CN113708433A - Marine direct-current power supply comprehensive energy management system - Google Patents
Marine direct-current power supply comprehensive energy management system Download PDFInfo
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- CN113708433A CN113708433A CN202110812713.8A CN202110812713A CN113708433A CN 113708433 A CN113708433 A CN 113708433A CN 202110812713 A CN202110812713 A CN 202110812713A CN 113708433 A CN113708433 A CN 113708433A
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- charging
- discharging
- storage battery
- power supply
- battery pack
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- 238000007600 charging Methods 0.000 claims abstract description 119
- 238000007599 discharging Methods 0.000 claims abstract description 109
- 238000011161 development Methods 0.000 description 4
- 206010063385 Intellectualisation Diseases 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A marine DC power supply integrated energy management system comprises: the intelligent ship charging and discharging device comprises a charging and discharging plate of a storage battery pack on a ship, a storage battery information acquisition device respectively in circuit connection with the storage battery pack and the charging and discharging plate, and at least two intelligent discharging boxes in circuit connection with the charging and discharging plate; the charging and discharging board is used for realizing charging and discharging management of the storage battery pack, the storage battery information acquisition device acquires voltage and temperature information of the storage battery pack and sends the voltage and temperature information to the charging and discharging board, and the intelligent discharging box realizes discharging control of the storage battery pack. The invention realizes the efficient, intelligent and lossless charging of the ship storage battery pack, and effectively prolongs the service life of the ship storage battery pack.
Description
Technical Field
The invention relates to a marine direct-current power supply comprehensive energy management system.
Background
With the continuous propulsion of the intellectualization of ships, the traditional charging and discharging device is obviously lagged behind in the protection and automation degree of the service life of the storage battery.
Disclosure of Invention
The invention aims to provide a comprehensive energy management system of a marine direct-current power supply, which realizes the efficient, intelligent and lossless charging of a ship storage battery pack and effectively prolongs the service life of the ship storage battery pack.
In order to achieve the above object, the present invention provides a comprehensive energy management system for a marine dc power supply, comprising: the intelligent ship charging and discharging device comprises a charging and discharging plate of a storage battery pack on a ship, a storage battery information acquisition device respectively in circuit connection with the storage battery pack and the charging and discharging plate, and at least two intelligent discharging boxes in circuit connection with the charging and discharging plate;
the charging and discharging board is used for realizing charging and discharging management of the storage battery pack, the storage battery information acquisition device acquires voltage and temperature information of the storage battery pack and sends the voltage and temperature information to the charging and discharging board, and the intelligent discharging box realizes discharging control of the storage battery pack.
The charge and discharge panel includes: daily charge-discharge screens, wireless charge-discharge screens and temporary emergency charge-discharge screens;
the daily charge-discharge screen carries out floating charge on the daily storage battery pack in the storage battery pack;
the wireless charging and discharging screen performs charging and discharging type charging on a wireless storage battery pack in the storage battery pack;
and the temporary emergency charging and discharging screen performs floating charging on the temporary emergency storage battery pack in the storage battery pack.
The daily charge-discharge screen, the radio charge-discharge screen and the temporary emergency charge-discharge screen are consistent in structure and comprise a charge module and a power supply module, the charge module is used for charging the storage battery pack, and the power supply module is used for supplying power to a load user.
The daily charge-discharge screen, the radio charge-discharge screen and the temporary emergency charge-discharge screen also comprise a first diode group and a second diode group;
the anode of the first diode group is connected with the anode of the output end of the charging module, and the cathode of the first diode group is connected with the anode of the output end of the power supply module, so that the voltage of the charging module is reduced to be the same as that of the power supply module;
the cathodes of two diodes in the second diode group are connected to a load user side, the anode of one diode is connected to the anode of the charging module, and the anode of the other diode is connected to the anode of the power supply module, so that the power supply direction is ensured.
The two ends of the first diode group are connected with a relay contact in parallel, when the charging module carries out floating charging on the storage battery pack, the charging voltage of the charging module is the same as that of the power supply module, the relay contact is closed at the moment, and the direction of power supply is ensured by the second diode group.
The daily charging and discharging screen provides an AC220V power supply to an intelligent discharging box to provide a working power supply for the intelligent discharging box; the daily charging and discharging screen provides a DC24V power supply to the storage battery information acquisition device, and provides a working power supply for the storage battery information acquisition device.
The temporary emergency charging and discharging screen provides an AC220 power supply to the other intelligent discharging box to provide a working power supply for the other intelligent discharging box.
And a 450A fuse is connected in series between the daily charge-discharge screen and the daily storage battery pack to be used as charge-discharge protection.
A200A fuse is connected in series between the wireless charging and discharging screen and the wireless storage battery pack to be used as charging and discharging protection.
And a 260A fuse is connected in series between the temporary emergency charging and discharging screen and the temporary emergency storage battery pack to be used as charging and discharging protection.
The invention realizes the efficient, intelligent and lossless charging of the ship storage battery pack, effectively prolongs the service life of the ship storage battery pack, conforms to the trend of intelligent charging and discharging of ships, can reduce the harm of the scrapped storage battery to the environment, has promotion significance to green development, realizes online real-time monitoring and friendly human-computer interaction, promotes the development of the ship charging and discharging device, and promotes the process of ship intellectualization.
Drawings
Fig. 1 is a circuit block diagram of a marine dc power supply integrated energy management system according to the present invention.
Fig. 2 is a specific circuit diagram of the daily charge-discharge panel.
Detailed Description
The preferred embodiment of the present invention will be described in detail below with reference to fig. 1 to 2.
As shown in fig. 1, the present invention provides a comprehensive energy management system for a marine dc power supply, comprising: the charging and discharging device comprises a charging and discharging plate 1 which is connected with a storage battery pack 5 through a circuit, a storage battery information acquisition device 2 which is respectively connected with the storage battery pack 5 and the charging and discharging plate 1 through a circuit, and a first intelligent discharging box 3 and a second intelligent discharging box 4 which are connected with the charging and discharging plate 1 through a circuit. The charging and discharging board 1 is used for realizing charging and discharging management of the storage battery pack 5, the storage battery information acquisition device 2 acquires voltage and temperature information of the storage battery pack 5 and sends the voltage and temperature information to the charging and discharging board 1, and the first intelligent discharging box 3 and the second intelligent discharging box 4 realize discharging control of the storage battery pack 5. The load users in fig. 1 refer to devices that require direct current on board (i.e., direct current loads).
In one embodiment of the invention, the charging and discharging plate 1 comprises a daily charging and discharging screen, a radio charging and discharging screen and a temporary emergency charging and discharging screen, wherein the daily charging and discharging screen, the radio charging and discharging screen and the temporary emergency charging and discharging screen have basically the same circuit structure and are used for charging storage batteries in different areas on a ship. The daily charge-discharge screen is responsible for carrying out floating charge on the daily storage battery pack in the storage battery pack 5, a 450A fuse (1 FU31 and 1FU32 in fig. 2) is used for charge-discharge protection of the storage battery, and the capacity of the daily storage battery pack is DC24V and 800 Ah; the wireless charging and discharging screen is responsible for charging 2 groups of wireless storage battery packs in the storage battery pack 5 in a charging and discharging mode, a 200A fuse is adopted as storage battery pack charging and discharging protection, and the capacities of the 2 groups of wireless storage battery packs are DC24V and 400 Ah; the temporary emergency charging and discharging screen is responsible for carrying out floating charging on a temporary emergency storage battery pack in the storage battery pack 5, a 260A fuse is used for charging and discharging protection of the storage battery pack, and the capacity of the temporary emergency storage battery pack is DC220V and 400 Ah. The storage battery information acquisition device 2 acquires voltage and temperature information of the storage battery pack 5 and communicates the voltage and temperature information to the charge and discharge panel 1 through the programmable controller. The first intelligent discharging box 3 and the second intelligent discharging box 4 adopt a programmable controller to monitor discharging of the storage battery, adopt a PLC (programmable controller) to collect discharging parameters such as discharging current, discharging voltage and the like, control access of a PTC load (a resistance type component in the intelligent discharging box and used for consuming electric energy of the storage battery) through a direct current contactor in the intelligent discharging box to realize set current discharging of the storage battery pack, can set the discharging parameters on a text display of the charging and discharging panel 1, transmit control commands (such as starting and stopping and parameter setting) of the charging and discharging panel to the intelligent discharging box through RS485 communication, and transmit state parameters (such as discharging current, discharging voltage, temperature and the like) of the intelligent discharging box to the charging and discharging panel through RS485 communication.
The charging and discharging panel 1 converts the input three-phase 380V alternating voltage into the voltage required by the storage battery pack 5, the first intelligent discharging box 3 and the second intelligent discharging box 4. The daily charge-discharge screen provides 1 path of AC220V power to the first intelligent discharge box 3 to provide a working power supply for the first intelligent discharge box, and the daily charge-discharge screen provides 1 path of DC24V power to the storage battery information acquisition device 2 to provide a working power supply for the storage battery information acquisition device; the temporary emergency charging and discharging screen provides 1 path of AC220 power to the second intelligent discharging box 4, and provides working power for the second intelligent discharging box. The charging and discharging panel 1 adopts a PWM high-frequency switching power supply as a charging and power supply module, an input three-phase 380V alternating current voltage is rectified and filtered into a direct current voltage of about 500V and then is sent to a high-voltage converter, the low-voltage output of the high-voltage converter is rectified and filtered into a direct current output, and the direct current output voltage is sampled and amplified to a pulse width control circuit, so that the pulse duty ratio of the high-voltage converter is changed, and the output voltage is kept stable.
As shown in fig. 2, a charging module 1KM1 and a power supply module 1KM2 are disposed in the daily charging and discharging screen, wherein the charging module 1KM1 is normally used for charging the storage battery pack, the voltage of the charging module is generally much higher than 24V due to the characteristic of battery charging, and the power supply module 1KM2 is used for supplying power to a load user, and the voltage of the power supply module is generally only slightly higher than 24V. Because the charging voltage of the charging module 1KM1 for constant voltage charging of the battery pack is generally higher than 24V (about 27.6V), in order to realize the function of automatically switching to the function of supplying power to the load by connecting the charging module 1KM1 and the power supply module 1KM2 in parallel when the load is larger than the power supply capability of the power supply module, a first diode group 1D2 and a second diode group 1D3 are arranged in the circuit, the anode of the first diode group 1D2 is connected to the anode of the output terminal of the charging module 1KM1 (or the anode of the storage battery), the cathode is connected to the anode of the output terminal of the power supply module, the main function is to reduce the voltage of the charging module 1KM1 to be the same as that of the power supply module 1KM2 when the charging module 1KM1 supplies power to the load, the cathodes of two diodes in the second diode group 1D3 are connected to the user terminal of the load, wherein the anode of one diode is connected to the anode of the charging module 1KM1, and the anode of the other diode is connected to the anode of the power supply module 1KM2, for ensuring the direction of the power supply. And the relay contact of 1KM1-1 is connected in parallel with the first diode group 1D2, when the charging module 1KM1 carries out floating charging on the storage battery pack, the charging voltage is the same as that of the power supply module 1KM2, the contact is closed, the directionality of power supply is ensured by the second diode group 1D3, and the contact of 1KM1-1 shorts the voltage reduction function of the first diode group 1D 2.
In another embodiment of the invention, in order to ensure the safety of the battery chamber (the safety hazards of heating, hydrogen generation and the like in the long-term use of the storage battery), the charge and discharge plate 1 is arranged in linkage with a fan signal of the battery chamber, the fan is started when charging is carried out, and the fan is stopped after the charging is stopped and is operated for a period of time. Meanwhile, the charge and discharge board 1 is also connected with a ship PMS (management information system) device and used for sending sound and light alarm signals to the ship PMS device under abnormal conditions (high temperature, overcurrent, overvoltage, low voltage and the like).
The invention realizes the efficient, intelligent and lossless charging of the ship storage battery pack, effectively prolongs the service life of the ship storage battery pack, conforms to the trend of intelligent charging and discharging of ships, can reduce the harm of the scrapped storage battery to the environment, has promotion significance to green development, realizes online real-time monitoring and friendly human-computer interaction, promotes the development of the ship charging and discharging device, and promotes the process of ship intellectualization.
It should be noted that, in the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A marine DC power supply comprehensive energy management system is characterized by comprising: the intelligent ship charging and discharging device comprises a charging and discharging plate of a storage battery pack on a ship, a storage battery information acquisition device respectively in circuit connection with the storage battery pack and the charging and discharging plate, and at least two intelligent discharging boxes in circuit connection with the charging and discharging plate;
the charging and discharging board is used for realizing charging and discharging management of the storage battery pack, the storage battery information acquisition device acquires voltage and temperature information of the storage battery pack and sends the voltage and temperature information to the charging and discharging board, and the intelligent discharging box realizes discharging control of the storage battery pack.
2. The integrated energy management system for dc power supply for ships according to claim 1, wherein the charging and discharging panel comprises: daily charge-discharge screens, wireless charge-discharge screens and temporary emergency charge-discharge screens;
the daily charge-discharge screen carries out floating charge on the daily storage battery pack in the storage battery pack;
the wireless charging and discharging screen performs charging and discharging type charging on a wireless storage battery pack in the storage battery pack;
and the temporary emergency charging and discharging screen performs floating charging on the temporary emergency storage battery pack in the storage battery pack.
3. The integrated energy management system for marine direct-current power supplies according to claim 2, wherein the daily charge-discharge screen, the radio charge-discharge screen and the temporary emergency charge-discharge screen have the same structure, and each of the daily charge-discharge screen, the radio charge-discharge screen and the temporary emergency charge-discharge screen comprises a charging module and a power supply module, wherein the charging module is used for charging the storage battery pack, and the power supply module is used for supplying power to a load user.
4. The integrated energy management system for direct-current power supply for ships according to claim 3, wherein the daily charge-discharge screen, the radio charge-discharge screen and the temporary emergency charge-discharge screen further comprise a first diode group and a second diode group;
the anode of the first diode group is connected with the anode of the output end of the charging module, and the cathode of the first diode group is connected with the anode of the output end of the power supply module, so that the voltage of the charging module is reduced to be the same as that of the power supply module;
the cathodes of two diodes in the second diode group are connected to a load user side, the anode of one diode is connected to the anode of the charging module, and the anode of the other diode is connected to the anode of the power supply module, so that the power supply direction is ensured.
5. The integrated energy management system for DC power supply of ship of claim 4, wherein the two terminals of the first diode set are connected in parallel with a relay contact, when the charging module performs floating charging on the storage battery set, the charging voltage of the charging module is the same as that of the power supply module, and the relay contact is closed, so that the direction of power supply is ensured by the second diode set.
6. The integrated energy management system for direct current power supply of ship of claim 2, wherein said daily charge-discharge panel provides AC220V power to an intelligent discharge box for providing working power; the daily charging and discharging screen provides a DC24V power supply to the storage battery information acquisition device, and provides a working power supply for the storage battery information acquisition device.
7. The integrated energy management system for direct current power supply for ships according to claim 2, wherein the temporary emergency charging and discharging screen supplies AC220 power to another intelligent discharging box to supply working power thereto.
8. The integrated energy management system for direct-current power supplies for ships according to claim 2, characterized in that a 450A fuse is connected in series between the daily charge-discharge screen and the daily storage battery pack to be used as charge-discharge protection.
9. The integrated energy management system for DC power supply of ship of claim 2, wherein a 200A fuse is connected in series between said wireless charging and discharging screen and wireless storage battery for charging and discharging protection.
10. The integrated energy management system for direct current power supply of ship of claim 2, characterized in that a 260A fuse is connected in series between the temporary emergency charging and discharging screen and the temporary emergency storage battery set as charging and discharging protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812713.8A CN113708433A (en) | 2021-07-19 | 2021-07-19 | Marine direct-current power supply comprehensive energy management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812713.8A CN113708433A (en) | 2021-07-19 | 2021-07-19 | Marine direct-current power supply comprehensive energy management system |
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| Publication Number | Publication Date |
|---|---|
| CN113708433A true CN113708433A (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110812713.8A Pending CN113708433A (en) | 2021-07-19 | 2021-07-19 | Marine direct-current power supply comprehensive energy management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340233A (en) * | 2021-11-30 | 2022-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Intelligent discharge box |
-
2021
- 2021-07-19 CN CN202110812713.8A patent/CN113708433A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 常红艳等: ""船用免维护蓄电池及其充放电板设计的改进"", 《船舶电气与通信》, no. 4, pages 67 - 70 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114340233A (en) * | 2021-11-30 | 2022-04-12 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Intelligent discharge box |
| CN114340233B (en) * | 2021-11-30 | 2024-09-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Intelligent discharge box |
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