阅读说明：本技术 一种船舶电力蓄电池低电流快速充电系统及方法 (Low-current quick charging system and method for ship power storage battery ) 是由 张雷 林洪山 吴峰 王淑红 杜巧玲 周兵 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种船舶电力蓄电池低电流快速充电系统,包括：充放电转换模块、充放电管理系统、船舶动力电源模块和对外充电连接器模块；对外充电连接器模块与充放电转换模块电连接,对外充电连接器模块与外部电源连接引入外部电源；船舶动力电源模块的电源输出端与充放电转换模块电连接,充放电转换模块中设置有放电单元和充电单元,通过放电单元和充电单元之间的切换控制船舶动力电源模块的充电或放电状态,以使外部电源通过对对外充电连接器模块对充电状态的船舶动力电源模块进行充电；充放电管理系统与充放电转换模块通信连接,充放电管理系统向充放电转换模块发送充电或放电指令,以使充放电转换模块控制放电单元和充电单元的闭合或断开。(The invention discloses a low-current quick charging system for a ship power storage battery, which comprises: the charging and discharging management system comprises a charging and discharging conversion module, a charging and discharging management system, a ship power supply module and an external charging connector module; the external charging connector module is electrically connected with the charging and discharging conversion module and is connected with an external power supply to introduce the external power supply; the power output end of the ship power supply module is electrically connected with the charge-discharge conversion module, the charge-discharge conversion module is internally provided with a discharge unit and a charge unit, and the charge or discharge state of the ship power supply module is controlled by switching between the discharge unit and the charge unit, so that an external power supply charges the ship power supply module in the charge state through the external charge connector module; the charging and discharging management system is in communication connection with the charging and discharging conversion module and sends a charging or discharging instruction to the charging and discharging conversion module so that the charging and discharging conversion module controls the charging unit and the discharging unit to be switched on or switched off.)

1. A low current fast charging system for a ship power storage battery, comprising: the charging and discharging management system comprises a charging and discharging conversion module, a charging and discharging management system, a ship power supply module and an external charging connector module;

the external charging connector module is electrically connected with the charging and discharging conversion module and is used for being connected with an external power supply to introduce the external power supply; the power output end of the ship power supply module is electrically connected with the charge-discharge conversion module, a discharge unit and a charge unit are arranged in the charge-discharge conversion module, and the charge or discharge state of the ship power supply module is controlled through switching between the discharge unit and the charge unit, so that an external power supply charges the ship power supply module in the charge state through the external charge connector module;

the charging and discharging management system is in communication connection with the charging and discharging conversion module and is used for sending a charging or discharging instruction to the charging and discharging conversion module so that the charging and discharging conversion module controls the charging unit and the discharging unit to be switched on or switched off.

2. The low-current rapid charging system for a ship power storage battery of claim 1, wherein the ship power supply module comprises a plurality of ship power battery units, and power output ends of the ship power battery units are electrically connected with the charge-discharge conversion module.

3. The marine vessel power storage battery low current fast charging system of claim 2, wherein the marine vessel power cell unit comprises a battery pack.

4. The low current rapid charging system for a marine power storage battery according to claim 2, wherein the charge-discharge conversion module comprises a plurality of charge-discharge conversion boxes, and a discharge switch and a charge switch are disposed in the charge-discharge conversion boxes.

5. The low current rapid charging system for a marine vessel power storage battery according to claim 4, wherein the charging terminals are electrically connected in series between the charging and discharging switching boxes.

6. The low current rapid charging system for a marine vessel power storage battery as claimed in claim 4, wherein the discharge switch and the charge switch are connected by an interlocking state.

7. The low current rapid charging system for a marine vessel power storage battery as claimed in claim 1, wherein the charge-discharge conversion module, the marine vessel power supply module and the external charging connector module are electrically connected by a power cable.

8. The low-current rapid charging system for a ship power storage battery according to claim 1, wherein the charge-discharge conversion module is connected with the charge-discharge management system through a communication cable.

9. A method for a low-current fast charging system of a ship power storage battery based on any one of claims 1 to 8, characterized by comprising the following steps:

judging the current working condition, sending a charging instruction or a discharging instruction to a charging and discharging conversion module according to a preset rule so as to realize the switching of a discharging unit or a charging unit of the charging and discharging conversion module, and controlling the charging or discharging state of the ship power supply module so that an external power supply charges the ship power supply module in the charging state through the external charging connector module;

wherein the preset rule comprises:

when the charging condition is judged, a charging instruction is sent to the charging and discharging conversion module, the discharging unit is controlled to be disconnected, and the charging unit is controlled to be closed;

and when the ship operation condition is judged, a discharging instruction is sent to the charging and discharging conversion module, the charging switch is controlled to be switched off, and the discharging switch is controlled to be switched on.

10. The low-current quick charging method for the ship power storage battery according to claim 9, characterized in that under the charging working condition, the discharging unit is controlled to be switched off, and then the charging unit is controlled to be switched on; under the operating condition of the ship, the charging switch is controlled to be switched off, and then the discharging switch is controlled to be switched on.

Technical Field

The invention relates to the technical field of ships, in particular to a low-current quick charging system and method for a ship power storage battery.

Background

Generally, a battery charging and discharging system of a battery-powered ship is a battery unit grid-connected system. The charging current of the ship power battery is increased due to the increase of the capacity of the ship-mounted battery, and the development, market popularization and operation efficiency of the battery power ship are always restricted by the problem of quick charging aiming at the power requirement of the high-power battery of a large freight ship in the future. In order to improve the safety, rapidity and practicability of the charging of the power battery in the operation of the battery-powered ship, the provision of a safe and applicable charging system for the battery-powered ship has become a core technical key point of the battery-powered ship.

Disclosure of Invention

The invention provides a low-current quick charging system and a low-current quick charging method for a ship power storage battery.

In order to solve the above technical problem, an embodiment of the present invention provides a low-current fast charging system for a ship power storage battery, including: the charging and discharging management system comprises a charging and discharging conversion module, a charging and discharging management system, a ship power supply module and an external charging connector module;

the external charging connector module is electrically connected with the charging and discharging conversion module and is used for being connected with an external power supply to introduce the external power supply; the power output end of the ship power supply module is electrically connected with the charge-discharge conversion module, a discharge unit and a charge unit are arranged in the charge-discharge conversion module, and the charge or discharge state of the ship power supply module is controlled through switching between the discharge unit and the charge unit, so that an external power supply charges the ship power supply module in the charge state through the external charge connector module;

the charging and discharging management system is in communication connection with the charging and discharging conversion module and is used for sending a charging or discharging instruction to the charging and discharging conversion module so that the charging and discharging conversion module controls the charging unit and the discharging unit to be switched on or switched off.

Preferably, the ship power supply module comprises a plurality of ship power battery units, and the power output ends of the ship power battery units are electrically connected with the charge-discharge conversion module.

Preferably, the ship power battery unit comprises a storage battery pack.

Preferably, the charge-discharge conversion module comprises a plurality of charge-discharge conversion boxes, and a discharge switch and a charge switch are arranged in each charge-discharge conversion box.

Preferably, the charging terminals of the charging and discharging switching boxes are electrically connected in series.

Preferably, the discharge switch and the charge switch are connected in an interlocked state.

Preferably, the charging and discharging conversion module, the ship power supply module and the external charging connector module are electrically connected through a power cable.

Preferably, the charge-discharge conversion module is connected with the charge-discharge management system through a communication cable.

The embodiment of the invention also provides a low-current quick charging method for the ship power storage battery, which comprises the following steps:

judging the current working condition, sending a charging instruction or a discharging instruction to a charging and discharging conversion module according to a preset rule so as to realize the switching of a discharging unit or a charging unit of the charging and discharging conversion module, and controlling the charging or discharging state of the ship power supply module so that an external power supply charges the ship power supply module in the charging state through the external charging connector module;

wherein the preset rule comprises:

when the charging condition is judged, a charging instruction is sent to the charging and discharging conversion module, the discharging unit is controlled to be disconnected, and the charging unit is controlled to be closed;

and when the ship operation condition is judged, a discharging instruction is sent to the charging and discharging conversion module, the charging switch is controlled to be switched off, and the discharging switch is controlled to be switched on.

As a preferred scheme, under the charging working condition, the discharging unit is controlled to be disconnected firstly, and then the charging unit is controlled to be closed; under the operating condition of the ship, the charging switch is controlled to be switched off, and then the discharging switch is controlled to be switched on.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

according to the invention, through the switch connection and the work conversion of the charge-discharge conversion module, the series charge and parallel discharge work of the battery power unit is realized, and the problems of heating and reasonable distribution of the charging current among the storage battery packs caused by the overlarge charging current during the parallel charging of the multi-battery pack are avoided; on the premise of ensuring the safe operation of the battery power freight ship, the charging voltage can be increased reasonably and flexibly, so that the rapidity and the safety of the charging work of the ship power storage battery pack are met, and the design and the production cost of a ship charging system are effectively reduced.

Drawings

FIG. 1: the structure schematic diagram of the low-current quick charging system of the ship power storage battery in the embodiment of the invention;

wherein the reference numbers of the drawings in the specification are as follows:

① charge-discharge conversion box, ② charge-discharge management system, ③ ship power accumulator unit, ④ external charging connector.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a preferred embodiment of the present invention provides a low-current fast charging system for a ship power storage battery, including: the charging and discharging management system comprises a charging and discharging conversion module, a charging and discharging management system, a ship power supply module and an external charging connector module;

the external charging connector module is electrically connected with the charging and discharging conversion module and is used for being connected with an external power supply to introduce the external power supply; the power output end of the ship power supply module is electrically connected with the charge-discharge conversion module, a discharge unit and a charge unit are arranged in the charge-discharge conversion module, and the charge or discharge state of the ship power supply module is controlled through switching between the discharge unit and the charge unit, so that an external power supply charges the ship power supply module in the charge state through the external charge connector module;

the charging and discharging management system is in communication connection with the charging and discharging conversion module and is used for sending a charging or discharging instruction to the charging and discharging conversion module so that the charging and discharging conversion module controls the charging unit and the discharging unit to be switched on or switched off.

According to the invention, through the switch connection and the work conversion of the charge-discharge conversion module, the series charge and parallel discharge work of the battery power unit is realized, and the problems of heating and reasonable distribution of the charging current among the storage battery packs caused by the overlarge charging current during the parallel charging of the multi-battery pack are avoided.

In this embodiment, the ship power supply module includes a plurality of ship power battery units, and the power output end of the ship power battery unit is electrically connected with the charge-discharge conversion module. In this embodiment, the charge-discharge conversion module includes a plurality of charge-discharge conversion boxes, and a discharge switch and a charge switch are disposed in the charge-discharge conversion boxes.

In this embodiment, the marine power cell unit includes a battery pack. In this embodiment, the charging terminals are electrically connected in series between the charging and discharging switching boxes. In this embodiment, the discharge switch and the charge switch are connected by an interlock state.

In this embodiment, the charging/discharging conversion module, the ship power supply module, and the external charging connector module are electrically connected through a power cable. In this embodiment, the charging and discharging conversion module is connected to the charging and discharging management system through a communication cable.

Referring to fig. 1, the schematic diagram of the low-current fast charging system for the ship power storage battery provided by the invention comprises ① a charging and discharging conversion box, ② a charging and discharging management system, ③ a ship power storage battery unit and ④ an external charging connector;

① the charging end of the charging and discharging conversion box can form ③ ship power accumulator unit series structure through cable connection, the ② charging and discharging management system ensures ③ ship power accumulator unit in series charging or working discharging state through the control to ① charging and discharging conversion box, the external high voltage DC power supply charges the series accumulator battery in charging state through ④ external charging connector.

Under the charging working condition, the ① charge-discharge conversion box is in the charging working mode, the discharge switch is switched off, the charge switch is switched on, and the charge switch and the discharge switch are in a linkage state, so that the charging working safety is ensured;

under the operation working condition of the ship, the ① charge-discharge conversion box is in a discharge working mode, the charge switch is switched off, the discharge switch is switched on, and the charge switch and the discharge switch are in a linkage state, so that the safety of discharge work is ensured;

① when the charge-discharge conversion box switches the working mode, the switch is required to be opened first, and the switch is required to be closed when the switch is closed, so as to ensure the safety of the charge-discharge work of the system.

The charging and discharging conversion box can enable the ship storage battery unit to work in two working modes and charging modes through the working mode conversion of the interlocking switch. A plurality of charge-discharge conversion boxes are connected in series in a charging mode through cables, and the charging voltage is improved through a series storage battery pack. The maximum charging working current of the battery pack after series connection is unchanged, and the power of the charging system is improved in multiples according to the number of the battery packs in series connection.

The embodiment of the invention also provides a low-current quick charging method for the ship power storage battery, which comprises the following steps:

judging the current working condition, sending a charging instruction or a discharging instruction to a charging and discharging conversion module according to a preset rule so as to realize the switching of a discharging unit or a charging unit of the charging and discharging conversion module, and controlling the charging or discharging state of the ship power supply module so that an external power supply charges the ship power supply module in the charging state through the external charging connector module;

wherein the preset rule comprises:

when the charging condition is judged, a charging instruction is sent to the charging and discharging conversion module, the discharging unit is controlled to be disconnected, and the charging unit is controlled to be closed;

and when the ship operation condition is judged, a discharging instruction is sent to the charging and discharging conversion module, the charging switch is controlled to be switched off, and the discharging switch is controlled to be switched on.

In this embodiment, under the charging condition, the discharging unit is controlled to be turned off first, and then the charging unit is controlled to be turned on; under the operating condition of the ship, the charging switch is controlled to be switched off, and then the discharging switch is controlled to be switched on.

The embodiment of the invention provides a low-current quick charging system for a ship power storage battery, which realizes series charging and parallel discharging work of a battery power unit through connection and work conversion of a charging and discharging conversion box, and avoids the problems of heating and reasonable distribution of charging current among storage battery packs caused by overlarge charging current during parallel charging of multiple battery packs. Under the premise of ensuring the safe operation of the battery power freight ship, the scheme can promote through reasonable and flexible charging voltage, not only meets the rapidity and the safety of the charging work of the ship power storage battery pack, but also effectively reduces the design and the production cost of a ship charging system.

The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.