CN206820086U - A kind of accumulator on-line maintenance control circuit and system - Google Patents

A kind of accumulator on-line maintenance control circuit and system Download PDF

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Publication number
CN206820086U
CN206820086U CN201720656373.3U CN201720656373U CN206820086U CN 206820086 U CN206820086 U CN 206820086U CN 201720656373 U CN201720656373 U CN 201720656373U CN 206820086 U CN206820086 U CN 206820086U
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China
Prior art keywords
batteries
bus
line maintenance
accumulator
control circuit
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CN201720656373.3U
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王凤仁
张文勇
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SHENZHEN AUTO ELECTRIC POWER PLANT CO Ltd
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SHENZHEN AUTO ELECTRIC POWER PLANT CO Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

It the utility model is related to a kind of accumulator on-line maintenance control circuit and system, including the first batteries, the second batteries, the first dc bus being connected with the first batteries and the second dc bus being connected with the second batteries, the two-way DC DC converters being connected respectively with the first dc bus and the second dc bus, first be connected with the first batteries charging unit, the second charging unit, the first battery data logging device, the second battery data logging device and the system monitor being connected with the second batteries;System monitor is connected with the first charging unit, the second charging unit, two-way DC DC converters, the first battery data logging device and the second battery data logging device respectively, the battery information of the first batteries and the second batteries is handled, output control instruction adjusts the working condition of two-way DC DC converters, the first charging unit and the second charging unit with to the first batteries or the second batteries progress on-line maintenance.This programme is simple and reliable, and on-line maintenance can be achieved.

Description

A kind of accumulator on-line maintenance control circuit and system
Technical field
Power domain is the utility model is related to, more specifically to a kind of accumulator on-line maintenance control circuit and is System.
Background technology
With the development of science and technology and the raising of application request, the reliability requirement of power system is also constantly carrying Height, wherein the batteries as energy storage device are essential, cause to exchange when accident occurs in the Alternating Current Power Supply end of power system During power-off, batteries will serve as power take-off, ensure important terminal device normal work, avoid the influence that causes the accident Extension.Therefore the reliability service of batteries is one of important leverage of Power System Reliability operation.In view of batteries Importance, in order to ensure that batteries can be run, it is necessary to periodically be safeguarded to batteries reliably and with long-term.
The maintaining method of conventional batteries is periodically to be discharged using battery discharging instrument in the market, is being discharged The method that journey detects single battery terminal voltage by battery data logging device is safeguarded.This maintenance is needed using maintenance off-line mode Professional operator's all-the-way tracking is wanted, and the time per group storage battery group maintenance once is about 10~20 hours, in power system The batteries substantial amounts used, therefore, it is necessary to substantial amounts of professional operator, human cost height.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided a kind of battery On-line maintenance control circuit and system.
Technical scheme is used by the utility model solves its technical problem:Construct a kind of accumulator on-line maintenance control Circuit, including the first batteries, the second batteries, the first dc bus being connected with first batteries and The second dc bus being connected with second batteries, in addition to it is female with first dc bus and the second direct current respectively The bidirectional DC-DC converter of line connection, the first charging unit being connected with first batteries and second battery The second charging unit, the first battery data logging device, the second battery data logging device and the system monitor of group connection;
First battery data logging device and the second battery data logging device are respectively to first batteries, the second batteries Working condition monitored in real time, export the battery information of first batteries and the battery of the second batteries respectively Information;
The system monitor respectively with the described first charging unit, the second charging unit, bidirectional DC-DC converter, the One logging and the connection of the second logging, handle the battery information of first batteries and second batteries Battery information, and output control instruction adjusts the bidirectional DC-DC converter, the first charging unit and the second charger The working condition of group is with to first batteries or the second batteries progress on-line maintenance.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that also include:It is straight with described first Flow bus or at least one terminal device of the second dc bus connection.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that the accumulator on-line maintenance Control circuit includes two terminal devices, and described two terminal devices include first terminal equipment and second terminal equipment;
The 3rd switch is provided between the first terminal equipment and first dc bus, the first terminal equipment exists Connected during the 3rd switch closure with first dc bus;
The 4th switch is provided between the second terminal equipment and second dc bus, the second terminal equipment exists Connected during the 4th switch closure with second dc bus.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that described also including first switch First switch is arranged between first dc bus and first batteries, by described in first switch control Connection or disconnection between first batteries and first dc bus.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that described also including second switch Second switch is arranged between second dc bus and second batteries, by described in second switch control Connection or disconnection between second batteries and second dc bus.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that also straight including being arranged on first The 5th switch between bus and the second dc bus is flowed, first dc bus and second are controlled by the described 5th switch The connection or disconnection of dc bus.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that the bidirectional DC-DC converter It is connected and by described with first dc bus provided with first interface and second interface, and by the first interface Second interface is connected with second dc bus.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that the first interface and described Second interface is the changeable interface of input-output characteristic.
In accumulator on-line maintenance control circuit described in the utility model, it is preferable that the bidirectional DC-DC converter Including the isolation circuit for isolating first dc bus and the second dc bus.
The utility model also provides a kind of accumulator on-line maintenance control system, including the battery described in any of the above-described On-line maintenance control circuit and host computer;
The host computer communicates to connect with the system monitor, and sends control instruction to the system monitor and connect Receive the system information of the system monitor transmission.
Implement accumulator on-line maintenance control circuit of the present utility model, have the advantages that:It is of the present utility model Accumulator on-line maintenance control circuit is realized to the online of battery on the premise of may be implemented in the normal operation for not influenceing system Safeguard, efficiently solve the problem for how reliably realizing that batteries automatic on-line is safeguarded in DC power system, and controlling party Formula is simple, flexibly, can be arranged as required to battery service time and maintenance period, safeguards that whole process can be automatic by system monitor Realize and participated in without professional operator, and the first batteries and the second batteries can realize capacity equilibrium, safety automatically Reliably.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is a kind of structural representation of accumulator on-line maintenance control circuit first embodiment of the present utility model;
Fig. 2 is a kind of structural representation of accumulator on-line maintenance control system first embodiment of the present utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.
The problem of existing for prior art, the utility model provide a kind of accumulator on-line maintenance control circuit.Should On-line maintenance control circuit is by the real-time monitoring to batteries and when battery meets maintenance condition by system monitor 10 send corresponding control instruction and then realize on-line maintenance.
Referring to Fig. 1, Fig. 1 is the structural representation of accumulator on-line maintenance control circuit of the present utility model.Such as Fig. 1 institutes Show, the accumulator on-line maintenance control circuit of the present embodiment includes the first batteries 201, the second batteries 202 and first First dc bus 101 of the connection of batteries 201 and the second dc bus 102 being connected with the second batteries 202, The bidirectional DC-DC converter 20 and first for also including being connected with the first dc bus 101 and the second dc bus 102 respectively stores First charging unit 401 of the connection of battery pack 201, second the 402, first electricity of charging unit being connected with the second batteries 202 Pond logging 301, the second battery data logging device 302 and system monitor 10;
Wherein, the first battery data logging device 301 and the second battery data logging device 302 store to the first batteries 201, second respectively The working condition of battery pack 202 is monitored in real time, exports the battery information and the second battery of the first batteries 201 respectively The battery information of group 202;System monitor 10 becomes with the first charging charging of unit 401, second unit 402, bi-directional DC-DC respectively Parallel operation 20, the first battery data logging device 301 and the second battery data logging device 302 connect, for handling the first batteries 201 The battery information of battery information and the second batteries 202, and output control instruction adjustment bidirectional DC-DC converter 20, first The working condition of the charging charging unit 402 of unit 401 and second, is realized to the first batteries 201 or the second batteries 202 on-line maintenance.
In actual applications, the utility model is applied to generally require 2 group storage battery groups, such as Fig. 1 during DC power system It is shown, including the first batteries 201 and the second batteries 202, wherein, the first batteries 201 and the second batteries 202 be the maintenance object of the utility model accumulator on-line maintenance control circuit, usually, the first batteries 201 and second The configuration of batteries 202 can be identical.It is to be appreciated that batteries can use lead-acid accumulator to form.
Bidirectional DC-DC converter 20, under normal circumstances, bidirectional DC-DC converter 20 are stand-by state;When needing to When one batteries 201 or the second batteries 202 carry out on-line maintenance, that is, bidirectional DC-DC converter 20 is enabled, by two-way DC-DC converter 20 provides discharging condition to the first batteries 201 or the second batteries 202.
It is to be appreciated that the bidirectional DC-DC converter 20 of the present embodiment is provided with 2 interfaces, as shown in figure 1, including first Interface and second interface, wherein, first interface is connected with the first dc bus 101, and second interface connects with the second dc bus 102 Connect.Preferably, first interface and second interface are the changeable interface of input-output characteristic.When the system is normal, first connect Mouth and second interface are set to input interface, and now bidirectional DC-DC converter 20 is in stand-by state.
It should be noted that the bidirectional DC-DC converter 20 of the present embodiment is needed in system operation and system monitor 10 are communicated, and it can use RS485 or CAN to realize and be communicated with system monitor 10.
Further, the inside of bidirectional DC-DC converter 20 sets isolation circuit, and the first direct current can be realized by isolation circuit The isolation characteristic of the dc bus 102 of bus 101 and second.
The first charging charging unit 402 of unit 401 and second, is mainly used in and the first batteries 201 and the second electric power storage Pond group 202 realizes that pairing uses, i.e., in DC power system, one group of charger need to be configured per group storage battery.It is normal in system During operation, charger be dc bus on load supplying, while for batteries supplement electricity, when need to batteries carry out During on-line maintenance, then the working condition of adjustment charging unit is needed, and then maintenance condition is provided to batteries.
Charger it is to be appreciated that the first charging unit 401 and second of the present embodiment charges in unit 402 can be by electricity Power operation power is formed with high-frequency switching power supply module, and its capacity can be configured according to the capacity of batteries, general work Filling and floating charge both of which.
Further, the first charging charging unit 402 of unit 401 and second is both needed to be communicated with system monitor 10, RS485 or CAN can be used to realize the communication connection with system monitor 10.
Battery data logging device, is mainly used in the working condition of detection batteries in real time, and testing result is uploaded into system Monitor 10.Further,, can be effective by detecting each single battery voltage in batteries when batteries are discharged And reliably detect single battery abnormal in batteries.
In addition, the present embodiment battery data logging device according to the configuration of batteries, each group storage battery, which assembles, puts one Battery data logging device.As shown in figure 1, including the first battery data logging device 301 and the second battery data logging device 302, patrolled by the first battery The inspection battery data logging device 302 of instrument 301 and second enters to the working condition of the first batteries 201 and the second batteries 202 respectively Row monitoring in real time, exports the battery information of the first batteries 201 and the battery information of the second batteries 202 respectively.
System monitor 10, it is mainly used in being monitored and controlled the working condition of whole DC power system, has been responsible for electric power storage The on-line maintenance of pond group, and maintenance period and maintenance time of batteries etc. can be set in system monitor 10.Specifically, When batteries meet maintenance condition, system monitor 10 is by the maintenance of automatic start batteries, and according to default dimension The working condition of the charging charging unit 402 of unit 401, second of shield Developing Tactics bidirectional DC-DC converter 20 and first is simultaneously timely The battery information that the first battery data logging device 301 and the second battery data logging device (302) 302 upload is handled, is realized to the first battery The on-line maintenance of the batteries 202 of group 201 or second.
Alternatively, accumulator on-line maintenance control circuit of the present utility model also includes at least one terminal device, its In, terminal device referred herein is the electrical equipment of DC power system, equivalent to the load of batteries, may generally be after Equipment etc. is protected, terminal device can be connected with the first dc bus 101 or the second dc bus 102.
Further, in the present embodiment, accumulator on-line maintenance control circuit of the present utility model may include two ends End equipment, as shown in figure 1, including first terminal equipment 501 and second terminal equipment 502, first terminal equipment 501 and first straight Stream bus 101 is connected, and second terminal equipment 502 is connected with the second dc bus 102.Alternatively, in first terminal equipment 501 The 3rd switch K3 can be set between the first dc bus 101, first terminal equipment 501 and the can be realized by the 3rd switch K3 Connection or disconnection between one dc bus 101;The can be set between the dc bus 102 of second terminal equipment 502 and second Four switch K4, company's on-off between the dc bus 102 of second terminal equipment 502 and second can be realized by the 4th switch K4 Open.
In addition, between the first batteries 201 and the first dc bus 101, the second batteries 202 and the second direct current First switch K1 and second switch K2 can be also respectively set between bus 102, the first battery can be realized by first switch K1 201 and first connection or disconnection between dc bus 101 of group, by second switch K2 can realize the second batteries 202 with Connection or disconnection between second dc bus 102.
As shown in figure 1, may also include the 5th switch K5 in the accumulator on-line maintenance control circuit of this example, the is arranged on Between one dc bus 101 and the second dc bus 102, for realizing the first dc bus 101 and the second dc bus 102 Connection disconnects.
The technical solution of the utility model is described in detail with a specific application example below:
Assuming that system is 220VDC systems, 2 sections of dc bus (i.e. the first dc bus 101 and the second dc bus 102), 2 groups of charging units (the first charging unit 401 and second charge unit 402), 2 group storage battery groups (the first batteries 201 and the Two batteries 202), and the configuration of the first batteries 201 and the second batteries 202 is completely the same, the appearance of batteries Measure as 200AH, even charging voltage 242VDC, float charge voltage 230VDC, the first batteries 201 or the second batteries 202 Final discharging voltage is 198VDC.
As shown in figure 1, when system is normal, first switch K1, second switch K2, the 3rd switch K3 and the 4th switch K4 Closure state is handled, the 5th switch K5 is off, and the first batteries 201 are connected with the first dc bus 101, the Two batteries 202 are connected with the second dc bus 102, and first terminal equipment 501 is connected with the first dc bus 101, and second Terminal device 502 is connected with the second dc bus 102;Now the first charging unit 401 is that first terminal equipment 501 is powered and is First batteries 201 supplement electricity, and output voltage is the float charge voltage of the first batteries 201;Second charging unit 402 is the Two terminal devices 502 are powered and are that the second batteries 202 supplement electricity, and output voltage is the floating charging of the second batteries 202 Pressure;When i.e. system is normal, the first batteries 201 and the second batteries 202 are in floating charge state, and terminal voltage is 230VDC;First battery data logging device 301 monitors the running status of the first batteries 201 in real time, and the second battery data logging device 302 is real When monitor the running statuses of the second batteries 202;The first interface and second interface of bidirectional DC-DC converter 20 are disposed as Input interface, i.e. bidirectional DC-DC converter 20 are in stand-by state.202 equal work of first batteries 201 and the second batteries Make under float charge voltage state, it is assumed that when meeting maintenance condition, system monitor 10 will send corresponding control instruction, and then right First batteries 201 or the second batteries 202 perform electric discharge and safeguarded.
Specifically, exemplified by safeguarding the first batteries 201, when the first batteries 201 reach the condition that needs safeguard When, system monitor 10 issues the instruction for safeguarding the first batteries 201, and the first charging unit 401 receives maintenance the simultaneously The instruction of one batteries 201, and voltage is output it according to the instruction received and is adjusted to final voltage 198VDC;It is two-way DC-DC converter 20 receives the instruction for safeguarding the first batteries 201, and first interface is arranged into input according to the instruction and connect Mouthful, second interface is arranged to output interface, starts bidirectional DC-DC converter 20, and the output voltage for adjusting second interface is equal Charging voltage 242VDC;After second charging unit 402 receives the instruction for safeguarding the first batteries 201, i.e., by its output voltage Remain float charge voltage 230VDC.
Now, because the output voltage of the first charging unit 401 is terminal voltages of the 198VDC less than the first batteries 201 (230VDC), and the output voltage of bidirectional DC-DC converter 20 is the terminal voltage that 242VDC is higher than the second batteries 202 (230VDC), therefore, the first batteries 201 will be discharged, and the second batteries 202 will be electrically charged.In the first batteries In 201 discharge processes, the first battery data logging device 301 detects each single battery voltage in the first battery in real time, and will detection As a result (i.e. the battery informations of the first batteries 201) are uploaded to system monitor 10, the timely processing of system monitor 10 in real time The battery information for the first batteries 201 that first battery data logging device 301 uploads, when the first batteries 201 have abnormal, Give a warning in time.When reaching default maintenance time, system monitor 10 sends the instruction for terminating to safeguard automatically, and now the One batteries 201 require supplementation with charging, and system monitor 10 can select the first charging unit 401 as the first batteries 201 supplement electricity, it is that the first batteries 201 are electrically charged that bidirectional DC-DC converter 20, which also may be selected,.
When selecting bidirectional DC-DC converter 20 to supplement electricity for the first batteries 201, now enter to the second battery The electric discharge maintenance program of group 202, the maintenance process of the second batteries 202 is identical with the maintenance process of the first batteries 201, So far, the maintenance process of the first batteries 201 terminates.
It should be noted that the first batteries 201 in the utility model embodiment in discharge process, need to pass through One dc bus 101 discharges its electric energy;Similarly, the second batteries 202 pass through the second dc bus 102 in discharge process Discharge its electric energy.
It is to be appreciated that in the maintenance process of the first batteries 201, if finding the abnormal state of the first batteries 201 Or during AC power dead electricity, system monitor 10 can terminate maintenance process immediately, and automatically by the electric energy of the second batteries 202 The first batteries 201 are transferred to, the electric energy of the first batteries 201 is kept close with the electric energy of the second batteries 202.
It can be found from above-mentioned control process, system monitor 10 can pre-set the on-line maintenance strategy of batteries, The maintenance process of batteries can be automatically performed, and batteries all without departing from system, realize storage in whole maintenance process The automatic on-line maintenance function of battery pack.
To sum up, the utility model provides a kind of accumulator on-line maintenance control circuit, and the circuit is to the online of battery Safeguard that implementation is simple and reliable, and can be transformed on the basis of existing DC power system, securely and reliably, not only effectively Ground solves the problem for how realizing batteries on-line maintenance, and on-line maintenance process can be completely automatic by system monitor 10 Realize, participated in without professional operator, do not influence the normal operation of system during on-line maintenance, two group storage batteries can be automatic Realize capacity equilibrium.
As shown in Fig. 2 present invention also offers a kind of accumulator on-line maintenance control system, it includes host computer and figure Accumulator on-line maintenance control circuit shown in 1.In this embodiment, host computer enters row data communication with system monitor 10, Specially host computer can send control instruction to system monitor 10, particularly send batteries maintenance instruction to start to the The maintenance of one batteries 201 or the second batteries 202, can also receive the system information returned by system monitor 10. It is to be appreciated that the system information that system monitor 10 returns includes battery information and the second electric power storage of the first batteries 201 The battery information of pond group 202.
For above example only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique Personage can understand content of the present utility model and implement accordingly, the scope of protection of the utility model can not be limited.It is all with The equivalent changes and modifications that the utility model claims scope is done, all should belong to the utility model claims covers model Enclose.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted, And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.

Claims (10)

1. a kind of accumulator on-line maintenance control circuit, including the first batteries (201), the second batteries (202) and institute State the first dc bus (101) of the first batteries (201) connection and be connected with second batteries (202) Second dc bus (102), it is characterised in that also include respectively with first dc bus (101) and the second dc bus (102) bidirectional DC-DC converter (20) of connection, the first charging unit being connected with first batteries (201) (401), be connected with second batteries (202) second charging unit (402), the first battery data logging device (301), second Battery data logging device (302) and system monitor (10);
First battery data logging device (301) and the second battery data logging device (302) respectively to first batteries (201), The working condition of second batteries (202) is monitored in real time, exports the battery letter of first batteries (201) respectively The battery information of breath and the second batteries (202);
The system monitor (10) respectively with described first charging unit (401), second charging unit (402), bi-directional DC-DC Converter (20), the first battery data logging device (301) and the second battery data logging device (302) connection, handle first battery The battery information of the battery information of group (201) and second batteries (202), and output control instruction adjustment is described two-way The working condition of DC-DC converter (20), the first charging unit (401) and the second charging unit (402) is with to described first Batteries (201) or the second batteries (202) carry out on-line maintenance.
2. accumulator on-line maintenance control circuit according to claim 1, it is characterised in that also include:With described first Dc bus (101) or at least one terminal device of the second dc bus (102) connection.
3. accumulator on-line maintenance control circuit according to claim 2, it is characterised in that the accumulator on-line maintenance Control circuit includes two terminal devices, and described two terminal devices include first terminal equipment (501) and second terminal equipment (502);
The 3rd switch, the first terminal are provided between the first terminal equipment (501) and first dc bus (101) Equipment (501) connects in the described 3rd switch closure with first dc bus (101);
The 4th switch, the second terminal are provided between the second terminal equipment (502) and second dc bus (102) Equipment (502) connects in the described 4th switch closure with second dc bus (102).
4. accumulator on-line maintenance control circuit according to claim 1, it is characterised in that also including first switch, institute State first switch to be arranged between first dc bus (101) and first batteries (201), pass through described first Switch controls the connection or disconnection between first batteries (201) and first dc bus (101).
5. accumulator on-line maintenance control circuit according to claim 1, it is characterised in that also including second switch, institute State second switch to be arranged between second dc bus (102) and second batteries (202), pass through described second Switch controls the connection or disconnection between second batteries (202) and second dc bus (102).
6. accumulator on-line maintenance control circuit according to claim 1, it is characterised in that also straight including being arranged on first The 5th switch between bus (101) and the second dc bus (102) is flowed, first direct current is controlled by the described 5th switch The connection or disconnection of bus (101) and the second dc bus (102).
7. accumulator on-line maintenance control circuit according to claim 1, it is characterised in that the bidirectional DC-DC converter Device (20) is provided with first interface and second interface, and be connected by the first interface with first dc bus (101), with And it is connected by the second interface with second dc bus (102).
8. accumulator on-line maintenance control circuit according to claim 7, it is characterised in that the first interface and described Second interface is the changeable interface of input-output characteristic.
9. accumulator on-line maintenance control circuit according to claim 8, it is characterised in that the bidirectional DC-DC converter Device (20) includes being used for the isolation circuit for isolating first dc bus (101) and the second dc bus (102).
10. a kind of accumulator on-line maintenance control system, it is characterised in that including the electric power storage described in any one of claim 1 to 9 Pond on-line maintenance control circuit and host computer;
The host computer communicates to connect with the system monitor (10), and sends control instruction to the system monitor (10) And receive the system information of system monitor (10) transmission.
CN201720656373.3U 2017-06-07 2017-06-07 A kind of accumulator on-line maintenance control circuit and system Active CN206820086U (en)

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CN201720656373.3U CN206820086U (en) 2017-06-07 2017-06-07 A kind of accumulator on-line maintenance control circuit and system

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Application Number Priority Date Filing Date Title
CN201720656373.3U CN206820086U (en) 2017-06-07 2017-06-07 A kind of accumulator on-line maintenance control circuit and system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108879879A (en) * 2018-08-10 2018-11-23 广东电网有限责任公司 Battery group is discharged maintenance device and method online

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108879879A (en) * 2018-08-10 2018-11-23 广东电网有限责任公司 Battery group is discharged maintenance device and method online

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