Ships

Abstract

To ensure a storage place of a storage battery and to suppress reduction of propulsion performance or restoration performance or reduction of cargo loading performance.SOLUTION: A vessel comprises: a hull; a propeller provided in the hull; an engine room provided on a stern side in the hull to store a propulsion motor for driving the propeller; a vehicle mounting section provided in the hull on the bow side of the engine room; and a side storage battery room provided along at least of one of the larboard side and the starboard side of the hull in the outside in a vessel width direction of the vehicle mounting section and capable of storing a storage battery for supplying power to at least the propulsion motor.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to marine vessels. [Background technology]

[0002] Patent Document 1 proposes a ship equipped with an electric propulsion system to reduce greenhouse gas emissions while the ship is sailing. The ship in Patent Document 1 is a small passenger ship that is not equipped with a generator and is normally operated solely by power from lithium-ion batteries that are charged while the ship is at anchor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-143099 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, it is desirable for large ships that travel at high speeds, such as car ferries and ROPAX (roll on / roll off passenger) ships, to be propelled by electric propulsion in order to reduce greenhouse gas emissions, just as is the case with small passenger ships such as those described in Patent Document 1. However, the larger the ship and the faster the ship's speed, the more energy it requires, and the more batteries it needs to install inside the hull. This increases the ship's weight, and there is a possibility that the propulsion and stability performance will decrease due to constraints on the ship's deadweight, maintaining the ship's proper attitude, and the ship's shape. Furthermore, since it is necessary to secure space within the hull to store a huge number of storage batteries, space for loading cargo, such as vehicle loading compartments, will be reduced, which could result in a decrease in cargo carrying capacity. In addition, the classification society's guidelines for large-capacity storage batteries stipulate that storage batteries cannot be installed in accommodation areas, and that storage batteries with a total capacity of 100 kWh or more must be installed in a dedicated compartment with a dedicated ventilation system, which can make it difficult to secure storage space for storage batteries within the hull. The present disclosure has been made to solve the above-mentioned problems, and aims to provide a ship that can secure storage space for batteries and suppress deterioration in propulsion performance, stability, and cargo carrying capacity. [Means for solving the problem]

[0005] In order to solve the above problems, the following configuration is adopted. A vessel according to the present disclosure includes a hull, a propeller mounted on the hull, an engine room mounted on the stern side of the hull and accommodating a propulsion motor that drives the propeller, a vehicle mounting compartment mounted on the hull on the bow side of the engine room, and a side battery compartment mounted along at least one of the port and starboard sides of the hull on the outer side in the ship's width direction of the vehicle mounting compartment and capable of accommodating a battery that supplies power to at least the propulsion motor. a bow-side battery room that is provided between the engine room and a collision bulkhead of the hull, the collision bulkhead being provided on the bow side of the ship opposite the engine room across the vehicle loading compartment, and that houses a battery that can supply power to at least the propulsion motor; Equipped with. [Effects of the Invention]

[0006] According to the ship of the above aspect, it is possible to secure a storage space for the storage battery, and to suppress a decrease in propulsion performance, stability, and cargo carrying capacity. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a side view schematically illustrating the arrangement of a battery compartment of the marine vessel according to the first embodiment of the present disclosure. [Figure 2] FIG. 2 is a plan view schematically illustrating the arrangement of battery compartments of the marine vessel according to the first embodiment of the present disclosure. [Figure 3] FIG. 10 is a view corresponding to FIG. 1 of a ship according to a second embodiment of the present disclosure. [Figure 4] FIG. 10 is a view corresponding to FIG. 2 of a vessel according to a second embodiment of the present disclosure. [Figure 5] FIG. 10 is a view corresponding to FIG. 1 of a ship according to a third embodiment of the present disclosure. [Figure 6] FIG. 10 is a view corresponding to FIG. 2 of a ship according to a third embodiment of the present disclosure. [Figure 7] FIG. 2 is a view corresponding to FIG. 1 of a ship according to a modified example of the first embodiment of the present disclosure. [Figure 8] FIG. 3 is a view corresponding to FIG. 2 of a ship according to a modified example of the first embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0008] [First embodiment] A marine vessel according to a first embodiment of the present disclosure will be described below with reference to the drawings. Fig. 1 is a side view schematically showing the arrangement of battery compartments in the marine vessel according to the first embodiment of the present disclosure. Fig. 2 is a plan view schematically showing the arrangement of battery compartments in the marine vessel according to the first embodiment of the present disclosure.

[0009] (Vessel configuration) The ship 1 of this embodiment is a ship such as a ferry, a RORO ship, or a car carrier that has a boarding deck on which vehicles can board under their own power. As shown in FIGS. 1 and 2, the vessel 1 in this embodiment includes at least a hull 11, a propeller 12, an engine room 13, a vehicle mounting compartment 14, and a side battery room 15. The hull 11 comprises at least a pair of left and right side shell platings 16, a bottom shell plating 17 connecting these side shell platings 16 at the bottom, and a deck 18 dividing the interior of the hull 11 into multiple upper and lower levels. The hull 11 of this embodiment has a shore ramp (not shown) at the stern 11a and on the side of the ship that forms a running path between the quay and the vehicle boarding deck 18b. Of the multiple decks 18, the deck 18 that is continuous with the running path of the shore ramp (not shown) is the vehicle boarding deck 18b.

[0010] The propeller 12 is provided on the hull 11. The propeller 12 is attached to the end of the propeller shaft 19 on the stern 11a side, and is rotatable around an axis extending in the bow-stern direction FA. In this embodiment, the propeller shaft 19 is driven by the power of the main engine 20 and the power of the propulsion motor 21.

[0011] The engine room 13 accommodates at least the propulsion motor 21 that drives the propeller 12. The engine room 13 is a watertight compartment, and is located closer to the stern 11a than the center of the hull 11 in the fore-aft direction FA. The engine room 13 of this embodiment also accommodates the propulsion motor 21 and a main engine 20 that drives the propeller 12. The main engine 20 converts thermal energy into rotational energy by burning fuel, and rotates the propeller shaft 19. Examples of the main engine 20 include an engine such as a diesel engine or a gas turbine. In this embodiment, the propulsion motor 21 assists the main engine 20 in driving the propeller 12, constituting a so-called hybrid propulsion system.

[0012] In this embodiment, the bow 11f side and the stern 11a side of the engine room 13 are divided by two transverse bulkheads 22, 23 extending in the ship's width direction W. These two transverse bulkheads 22, 23 divide the space below the vehicle boarding deck 18b in the vertical direction H (in other words, toward the bottom of the ship) in the fore-and-aft direction FA. The engine room 13 in this embodiment is divided by the two transverse bulkheads 22, 23, the ship's side shell plating 16, the vehicle boarding deck 18b, and the bottom shell plating 17.

[0013] The propulsion motor 21 drives the propeller 12, similarly to the main engine 20. In this embodiment, the propulsion motor 21 is configured to be able to assist the power of the main engine 20. In other words, the ship 1 of this embodiment is configured as a so-called two-engine, one-shaft, one-rudder system in which one propeller shaft 19 is driven by the main engine 20 and the propulsion motor 21. Note that the ship 1 is not limited to a two-engine, one-shaft, one-rudder system. In addition, the ship 1 is not limited to a configuration in which the propulsion motor 21 assists the main engine 20 to drive the propeller 12; for example, the propulsion motor 21 may be configured to be able to drive the propeller 12 alone when the main engine 20 fails. In addition, the engine room 13 may house a plurality of main engines 20 and a plurality of propulsion motors 21.

[0014] The vehicle loading compartment 14 is a compartment in which vehicles such as passenger cars and trucks can be loaded as cargo, and is provided inside the hull 11 on the bow 11f side of the engine room 13. In this embodiment, the vehicle loading compartment 14 is provided below the vehicle boarding deck 18b. Vehicles that have boarded the vehicle boarding deck 18b can move to the vehicle loading compartment 14 by self-propelling via a rampway (not shown).

[0015] The bow 11f side and the stern 11a side of the vehicle loading compartment 14 are separated by transverse bulkheads 22, 24 extending in the ship's width direction W. Furthermore, the port side and starboard side of the vehicle loading compartment 14 are separated by longitudinal bulkheads 26, 27 extending in the ship's width direction FA. The port-side longitudinal bulkhead 26 is formed along the port-side portside shell plating 16, and the starboard-side longitudinal bulkhead 27 is formed along the starboard-side shell plating 16. Here, if the overall width of the hull 11 is "B", the longitudinal bulkheads 26, 27 that separate the vehicle loading compartments 14 in the ship's width direction W may be positioned inward of a range B / 10 from the ship's side shell plating 16 in the ship's width direction W.

[0016] Of the transverse bulkheads 22, 24 that define the vehicle loading compartment 14 of this embodiment, the transverse bulkhead 22 on the stern 11a side is the same transverse bulkhead as the transverse bulkhead 22 that defines the bow 11f side of the engine room 13. In other words, the vehicle loading compartment 14 of this embodiment is adjacent to the engine room 13. However, the vehicle loading compartment 14 is not limited to being adjacent to the engine room 13. For example, a fuel tank for the main engine 20 may be provided between the engine room 13 and the vehicle loading compartment 14. Furthermore, the ship 1 of this embodiment has a double bottom, and the hull inner wall 30 of this double bottom forms the so-called vehicle deck 31 on which vehicles can be loaded. In the above description, the vehicle loading compartment 14 is formed by surrounding a portion of the hull inner wall 30 with the longitudinal bulkheads 26, 27 and the transverse bulkheads 22, 24. However, this configuration is not limited to this, and for example, a vehicle loading compartment 14 may be formed by providing another vehicle deck between the hull inner wall 30 and the vehicle boarding deck 18b in the vertical direction H, and surrounding this other vehicle deck with longitudinal bulkheads 26, 27 and transverse bulkheads 22, 24.

[0017] The side battery rooms 15 are provided along the port and starboard side shell plating 16 of the hull 11 on both outer sides in the width direction W of the ship of the vehicle loading compartment 14. The side battery rooms 15 are configured to be able to accommodate a battery (not shown) that supplies power to at least the propulsion motor 21. The side battery rooms 15 are formed between the left and right longitudinal bulkheads 26, 27 that separate the vehicle loading compartment 14 and the left and right side shell plating 16, respectively. The side battery rooms 15 in this embodiment are watertight compartments.

[0018] In this embodiment, the port side battery room 15 is defined by the transverse bulkhead 22 that defines the bow 11f side of the engine room 13, the longitudinal bulkhead 26, the port side shell plating 16, a bow bulkhead 28 extending from the longitudinal bulkhead 26 toward the port side shell plating 16, the vehicle boarding deck 18b, and the double bottom inner hull wall 30. Similarly, the starboard side battery room 15 is defined by the transverse bulkhead 22, the longitudinal bulkhead 27, the starboard side shell plating 16, the bow bulkhead 28 extending from the longitudinal bulkhead 26 toward the starboard side shell plating 16, the vehicle boarding deck 18b, and the double bottom inner hull wall 30. That is, both of the two side battery compartments 15 on the left and right are provided above the inner wall 30 of the double-bottom hull.

[0019] Although the longitudinal bulkheads 26, 27 are formed so as to extend from the double-bottom hull inner wall 30 to the vehicle boarding deck 18b in the above example, the longitudinal bulkheads 26, 27 may be formed so as not to extend to the vehicle boarding deck 18b. In that case, a deck (not shown) separate from the vehicle boarding deck 18b may be provided to partition the area above the side battery room 15.

[0020] In this embodiment, the side battery room 15 has girders (not shown) that reinforce the floor (the double-bottom hull inner wall 30 or the deck 18) to accommodate the heavy batteries. The side battery room 15 is also provided with a ventilation system (not shown) for the battery room, which has better ventilation performance than the ventilation pipes typically provided in void spaces, to accommodate the batteries. Furthermore, the side battery room 15 is heat-insulated (not shown) to prevent fires caused by the batteries.

[0021] The storage battery in this embodiment is a large-capacity lithium-ion storage battery. A plurality of storage batteries are housed in the side battery compartment 15, for example, in a state where they are fixed to a dedicated frame or the like.

[0022] The bow battery room 34 is located on the bow 11f side, opposite the engine room 13, across the vehicle loading compartment 14. The bow battery room 34 is located between the engine room 13 and a collision bulkhead 35 located on the bow 11f side of the hull 11. Like the side battery rooms 15, the bow battery room 34 also houses batteries capable of supplying power to at least the propulsion motors 21. The batteries housed in the bow battery room 34 are also high-capacity lithium-ion batteries. Multiple batteries are fixed to a dedicated frame or the like and housed in the bow battery room 34. Like the side battery rooms 15, the bow battery room 34 is also provided with reinforcing beams and a battery room ventilation system with high ventilation performance, and is heat-insulated to prevent fires caused by the batteries.

[0023] In this embodiment, the bow-side battery room 34 is defined by the transverse bulkhead on the bow 11f side that defines the vehicle loading compartment 14, the left and right side shell plating 16, the vehicle boarding deck 18b, and the double-bottom hull inner wall 30. That is, like the side battery rooms 15, the bow-side battery room 34 is located above the double-bottom hull inner wall 30. Furthermore, the transverse bulkhead 24 that defines the stern 11a side of the bow-side battery room 34 in this embodiment is the same transverse bulkhead as the transverse bulkhead 24 that defines the vehicle loading compartment 14. In other words, the bow-side battery room 34 in this embodiment is adjacent to the vehicle loading compartment 14. However, the bow-side battery room 34 is not limited to being adjacent to the vehicle loading compartment 14, and for example, a tank, void space, or the like may be provided between the bow-side battery room 34 and the vehicle loading compartment 14.

[0024] In this embodiment, the side battery room 15 is separated from the bow-side battery room 34 in the fore-and-aft direction FA. A void space, a ballast tank, etc. are formed between the side battery room 15 and the bow-side battery room 34 in the fore-and-aft direction FA. Note that in this embodiment, a case has been described in which the side battery room 15 and the bow-side battery room 34 are disposed separated from each other in the fore-and-aft direction FA, but, for example, the above-mentioned side battery room 15 may be extended toward the bow 11f so that the side battery room 15 and the bow-side battery room 34 are adjacent to each other.

[0025] (Action and effect) According to the ship 1 of the first embodiment described above, the ship 1 is provided with side battery rooms 15 that are arranged along the left and right side outer plates 16 of the hull 11 on both sides of the ship's width W of the vehicle mounting compartment 14 located within the hull 11 on the bow 11f side of the engine room 13, and are capable of accommodating batteries that supply power to at least the propulsion motors 21. This makes it possible to secure a storage space for the batteries outside the vehicle loading compartment 14. Furthermore, because the batteries, which are heavy objects, can be arranged on both outer sides of the vehicle loading compartment 14 in the ship's width direction W, it becomes possible, for example, to use the batteries instead of fixed ballast and adjust the number of batteries arranged on the left and right sides to adjust the heel of the hull 11. Therefore, it is possible to prevent an increase in the weight of the hull 11 and maintain an appropriate attitude of the hull 11 while adjusting the deadweight, thereby preventing a decrease in propulsion performance and stability.

[0026] According to the ship 1 of the first embodiment described above, a bow-side battery room 34 is further provided between the engine room 13 and the collision bulkhead 35 of the hull 11, which is located on the bow 11f side, opposite the engine room 13 across the vehicle loading compartment 14, and which houses a battery capable of supplying power to at least the propulsion motor 21. This allows the storage batteries, which are heavy objects, to be installed closer to the bow 11f than the transverse bulkhead 24 that separates the bow 11f side of the vehicle loading compartment 14. In other words, a storage space for the storage batteries can be secured outside the vehicle loading compartment 14. Therefore, it is possible to adjust the trim of the hull 11 by adjusting the number of storage batteries. Therefore, the fixed ballast on the bow 11f side of the vehicle loading section 14 can be reduced, which makes it possible to reduce the steel costs required for the fixed ballast. Furthermore, an increase in the weight of the hull 11 can be prevented, thereby preventing a decrease in propulsion performance and stability.

[0027] According to the ship 1 of the first embodiment, the side battery room 15 is provided between the longitudinal bulkheads 26, 27 that define the outer side of the vehicle loading compartment 14 in the ship width direction W and the side shell plating 16 of the hull 11. This allows the space between the longitudinal bulkheads 26, 27 and the side shell plating 16 to be effectively utilized, further preventing a decrease in the vehicle loading capacity of the vehicle loading compartment 14.

[0028] According to the vessel 1 of the first embodiment, the side battery compartment 15 is further provided above the hull inner wall 30 that forms the double bottom of the hull 11. This allows for easier battery replacement work when the battery reaches the end of its life, compared to when the battery is housed below the inner wall 30 of the double-bottom hull, thereby improving maintainability.

[0029] According to the ship 1 of the first embodiment, the engine room 13 further includes a main engine 20 . In this way, even when the engine room 13 is equipped with the main engine 20, which is a heavy object, it is possible to adjust the trim and heel using the batteries housed in the side battery room 15, which is located closer to the bow 11f than the engine room 13. Furthermore, by providing the main engine 20, even if the batteries housed in the side battery room 15 alone are insufficient for trim adjustment, further trim adjustment can be made using the batteries housed in the bow-side battery room 34. Therefore, it is possible to make appropriate trim adjustment.

[0030] [Second embodiment] Next, a second embodiment of the present disclosure will be described with reference to the drawings. This second embodiment differs from the first embodiment only in that a watertight chamber is provided in the vessel 1. Therefore, the same parts as those in the first embodiment are designated by the same reference numerals, and redundant description will be omitted.

[0031] Fig. 3 is a view of a vessel according to a second embodiment of the present disclosure, corresponding to Fig. 1. Fig. 4 is a view of a vessel according to the second embodiment of the present disclosure, corresponding to Fig. 2. As shown in Figures 3 and 4, the ship 101 of the second embodiment, like the ship 1 of the first embodiment, has at least a hull 11, a propeller 12, an engine room 13, a vehicle mounting compartment 14, and a side battery room 115. The hull 11 of the ship 101 of the second embodiment is provided with a watertight compartment, a watertight room 40, between the engine room 13 and the side battery room 115 in the fore-aft direction FA. One watertight room 40 is provided on each of the port and starboard sides in the ship's width direction W. The watertight room 40 is partitioned by at least the ship's side shell plating 16 and the transverse bulkhead 22. In other words, by providing the watertight room 40, the side battery room 15 and the engine room 13 are spaced apart in the fore-aft direction FA.

[0032] In this embodiment, a watertight bulkhead 41 is formed between the watertight compartment 40 and the side battery compartment 115, separating the watertight compartment 40 and the side battery compartment 115 in the fore-aft direction FA. That is, the watertight compartment 40 in this embodiment is partitioned by the side shell plating 16, the double-bottom hull inner wall 30, the transverse bulkhead 22, the longitudinal bulkhead 26 or the longitudinal bulkhead 27, and the watertight bulkhead 41. Although the example described above is one in which the watertight compartment 40 is located closer to the bow 11f than the transverse bulkhead 22, as shown by the dashed line in Figure 4, the watertight compartment 40 may be located, for example, closer to the stern 11a than the transverse bulkhead 22, or may be located on both the bow 11f side and the stern 11a side of the transverse bulkhead 22 in the fore-aft direction FA.

[0033] According to the second embodiment, by providing the floodproof room 40, even if damage occurs to the side shell plating 16 near the transverse bulkhead 22 that separates the bow 11f side of the engine room 13, it is possible to prevent flooding of the floodproof room 40 and flooding of both the engine room 13 and the side battery room 115. Bulkheads may be provided within the floodproof room 40 to divide the space within the floodproof room 40 in the vertical direction H or the fore-aft direction FA.

[0034] [Third embodiment] Next, a third embodiment of the present disclosure will be described with reference to the drawings. This third embodiment differs from the boat 1 of the first embodiment described above only in the configuration of the side battery compartment 15 and the bow-side battery compartment 34. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

[0035] Fig. 5 is a view of a vessel according to a third embodiment of the present disclosure, corresponding to Fig. 1. Fig. 6 is a view of a vessel according to the third embodiment of the present disclosure, corresponding to Fig. 2. As shown in Figures 5 and 6, the ship 201 of the third embodiment, like the first embodiment, has a hull 11, a propeller 12, an engine room 13, a vehicle mounting compartment 14, and a side battery room 215. The side battery rooms 215 of the vessel 201 of the third embodiment are provided on the port and starboard sides, similar to the side battery rooms 15 of the first embodiment. The side battery room 215 of the third embodiment has a plurality of side battery compartments 50 that house batteries. Each of these side battery compartments 50 is a watertight compartment. In this embodiment, a first internal bulkhead 51 is provided that extends in the ship's width direction W and divides the interior of the side battery room 215 in the fore-aft direction FA, thereby forming a plurality of side battery compartments 50 lined up in the fore-aft direction FA. Each of these side battery compartments 50 houses a battery that can supply power to at least the propulsion motor 21.

[0036] Furthermore, like the side battery room 215, the bow-side battery room 234 of the third embodiment also has multiple bow-side battery compartments 52 that house batteries. Each of these multiple bow-side battery compartments 52 is also watertight. In this embodiment, the bow-side battery room 234 is provided with a second internal bulkhead 53 that divides the interior of the bow-side battery room 234 in the fore-stern direction FA and a third internal bulkhead that divides it in the up-down direction H, and multiple bow-side battery compartments 52 are formed side by side in the fore-stern direction FA and the up-down direction H. Each of these bow-side battery compartments 52 houses a battery that can supply power to at least the propulsion motor 21.

[0037] In the third embodiment, the bow-side battery room 234 has been described as having multiple bow-side battery compartments 52 arranged side by side in the fore-aft direction FA and the up-down direction H. However, the third internal bulkhead 54 may be omitted, and multiple bow-side battery compartments 52 may be arranged side by side only in the fore-aft direction FA, as in the side battery room 215. Also, the description has been given of the case where the side battery compartments 50 are arranged side by side in the fore-aft direction FA. However, this configuration is not limiting, and the side battery compartments 50 may be arranged side by side in the fore-aft direction FA and the up-down direction H, for example.

[0038] (Action and effect) According to the vessel 201 of the third embodiment, the first internal bulkhead 51 is provided to divide the interior of the side battery compartment 215 into a plurality of watertight compartments. Therefore, even if the side shell plating 16 is damaged and water enters the side battery room 215, it is possible to prevent the batteries housed away from the damaged area from becoming flooded. This makes it possible to maintain the power supply function of some of the unflooded batteries housed in the side battery room 15, ensuring redundancy.

[0039] The ship 201 of the third embodiment is provided with the second internal bulkhead 53 that divides the interior of the bow-side battery room 234 into a plurality of watertight compartments. Therefore, even if the ship's side shell plating 16 is damaged and water enters the bow battery room 234, it is possible to prevent the batteries housed away from the damaged area from becoming flooded. This makes it possible to maintain power supply from some of the unflooded batteries housed in the bow battery room 234, ensuring redundancy.

[0040] Furthermore, since multiple small chambers can be formed by the first internal partition 51 and the second internal partition 53, it is possible to narrow the area of ​​flooding compared to when no small chambers are formed.

[0041] Other Embodiments The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to the above embodiments, and also includes design modifications within the scope that does not deviate from the gist of the present disclosure. For example, in the above-described embodiments, the port side battery room 15, 115, 215 and the starboard side battery room 15, 115, 215 are described as being symmetrical. However, the port side battery room 15, 115, 215 and the starboard side battery room 15, 115, 215 are not limited to being symmetrical. Furthermore, the number of batteries housed in the port side battery room 15, 115, 215 and the number of batteries housed in the starboard side battery room 15, 115, 215 are not limited to being the same. When batteries are used instead of ballast to adjust the left-right balance (in other words, heel) of the hull 11, for example, the number of batteries housed in the left and right side battery rooms 15, 115, 215 may be different. Furthermore, the side battery rooms 15, 115, 215 do not necessarily have to be provided on both the port and starboard sides, but may be provided on only one of the port and starboard sides.

[0042] Furthermore, in each of the above embodiments, the description has been given of the case where the bow-side battery room 34, 234 is provided. However, the bow-side battery room 34, 234 may be omitted.

[0043] Fig. 7 is a diagram of a vessel according to a modification of the first embodiment of the present disclosure, corresponding to Fig. 1. Fig. 8 is a diagram of a vessel according to a modification of the first embodiment of the present disclosure, corresponding to Fig. 2. In the above embodiments, the bow-side battery room 34 is provided between the collision bulkhead 35 in the bow-stern direction FA and the vehicle loading compartment 14. However, if, for example, further trim adjustment toward the bow 11f side is required or if an increased number of batteries are required, a forward collision bulkhead battery room 60 that accommodates batteries may also be provided on the forward 11f side of the collision bulkhead 35, as shown in Figures 7 and 8. Also, if further trim adjustment toward the stern 11a side is required or if an increased number of batteries are required, an aft engine room battery room 61 that accommodates batteries may be provided on the aft 11a side of the engine room 13. Either the forward collision bulkhead battery room 60 or the aft engine room battery room 61 may be provided, or both, as needed. Similar to the bow-side battery room 34 described above, the battery room 60 in front of the collision bulkhead and the battery room 61 behind the engine room are provided with reinforcing girders and a battery room ventilation system with high ventilation performance, and are also heat-insulated to prevent fires caused by the batteries. Although a modified example of the first embodiment has been described with reference to Figures 7 and 8, the ship 101 of the second embodiment and the ship 201 of the third embodiment may be provided with at least one of the battery room 60 in front of the collision bulkhead and the battery room 61 behind the engine room.

[0044] In each of the above embodiments, the engine room 13 is provided with a main engine 20 that burns fuel to drive the propeller 12. However, the ship may not be provided with a main engine 20 in the engine room 13. Furthermore, in each of the above embodiments, a case has been described in which the propulsion motor 21 configures a so-called hybrid propulsion system in which the propulsion motor 21 assists the main engine 20. However, the present invention is not limited to the case of configuring a hybrid propulsion system, and for example, the propulsion motor 21 may drive an auxiliary propulsion device such as an azimuth thruster or a thruster, and the main engine 20 may drive the main propulsion device.

[0045] <Additional Notes> The ships 1, 101, and 201 described in the embodiments can be understood, for example, as follows.

[0046] (1) According to the first aspect, the ship 1, 101, 201 comprises a hull 11, a propeller 12 provided on the hull 11, an engine room 13 provided on the stern 11a side of the hull 11 and accommodating a propulsion motor 21 that drives the propeller 12, a vehicle mounting compartment 14 provided in the hull 11 on the bow 11f side of the engine room 13, and a side battery room 15, 115, 215 provided along at least one of the port side and starboard side of the hull 11 on both outer sides of the vehicle mounting compartment 14 in the ship's width direction W and capable of accommodating a battery that supplies power to at least the propulsion motor 21. Examples of vessels 1,101,201 include ferries, RORO ships, and car carriers.

[0047] This makes it possible to secure a storage space for the storage batteries outside the vehicle loading compartment 14. Furthermore, because the storage batteries, which are heavy objects, can be placed on both sides of the vehicle loading compartment 14 in the width direction W, it becomes possible to adjust the heel of the hull 11 by adjusting the number of storage batteries placed on the left and right sides using the storage batteries instead of fixed ballast, for example. Therefore, an increase in the hull weight can be suppressed, and the appropriate attitude of the hull 11 can be maintained while maintaining the deadweight, thereby suppressing a decrease in propulsion performance and stability.

[0048] (2) The vessel 201 according to the second aspect is the vessel 201 of (1), and includes a first internal bulkhead 51 that divides the interior of the side battery compartment 215 into a plurality of watertight compartments. This prevents flooding of batteries housed away from the damaged area, even if the side shell plating 16 is damaged and water seeps into the side battery room 215. This makes it possible to maintain the power supply function of some of the unflooded batteries housed in the side battery room 215, ensuring redundancy.

[0049] (3) The vessel 1, 101, 201 according to the third aspect is the vessel 1, 101, 201 according to (1) or (2), and further comprises a bow-side battery room 34, 234 located between the engine room 13 and the collision bulkhead 35 of the hull 11, which is located on the bow 11f side opposite the engine room 13 across the vehicle loading compartment 14, and which houses a battery capable of supplying power to at least the propulsion motor 21. This allows the storage batteries, which are heavy objects, to be installed closer to the bow 11f than the collision bulkhead 35, making it possible to adjust the trim of the hull 11 by adjusting the number of storage batteries. Therefore, the fixed ballast on the bow 11f side of the vehicle loading section 14 can be reduced, which makes it possible to reduce the steel costs required for the fixed ballast. Furthermore, an increase in the hull weight can be suppressed, which prevents a decrease in propulsion performance and stability.

[0050] (4) The ship 201 according to a fourth aspect is the ship 201 of (3), and includes a second internal bulkhead 53 that divides the interior of the bow-side battery room 234 into a plurality of watertight compartments. This prevents flooding of the batteries housed away from the damaged area, even if the ship's side shell plating 16 is damaged and water seeps into the bow battery room 234. This makes it possible to maintain power supply from some of the unflooded batteries housed in the bow battery room 234, ensuring redundancy.

[0051] (5) The ship 1, 101, 201 according to the fifth aspect is any one of the ships 1, 101, 201 of (1) to (4), and the side battery compartment 15, 115, 215 is provided between the longitudinal bulkheads 26, 27 that define the outer side of the vehicle loading compartment 14 in the ship's width direction W and the side shell plating 16 of the hull 11. This allows the space between the longitudinal bulkheads 26, 27 and the side shell plating 16 to be effectively utilized, further preventing a decrease in the vehicle loading capacity of the vehicle loading compartment 14.

[0052] (6) The sixth aspect of the vessel 1, 101, 201 is any one of the vessels 1, 101, 201 of (1) to (5), in which the side battery compartment 15, 115, 215 is located above the hull inner wall 30 that forms the double bottom of the hull 11. This allows for easier battery replacement work when the battery reaches the end of its life, compared to when the battery is housed below the inner wall 30 of the double-bottom hull, thereby improving maintainability.

[0053] (7) The ship 101 according to the seventh aspect is any one of the ships 101 (1) to (6), and has a watertight compartment between the engine room 13 and the side battery room 115 in the bow-stern direction FA. This prevents the watertight compartment from being flooded and both the engine room 13 and the side battery room 115 from being flooded, even if damage occurs to the side shell plating 16 near the transverse bulkhead 22 that separates the bow 11f side of the engine room 13, for example.

[0054] (8) The ships 1, 101, 201 according to an eighth aspect are the ships 1, 101, 201 according to (3), and further include a forward collision bulkhead battery room 60 that houses the batteries on the bow 11f side of the collision bulkhead 35. This allows the storage batteries to be accommodated closer to the bow 11f than the collision bulkhead 35, thereby increasing the number of storage batteries that can be installed in the hull 11 and enabling further trim adjustments toward the bow 11f.

[0055] (9) The vessel 1, 101, 201 according to the ninth aspect is any one of the vessels 1, 101, 201 according to (1) to (8), and is provided with an engine room rear battery room 61 that houses the battery on the stern 11a side of the engine room 13. This allows the storage batteries to be accommodated closer to the stern 11a than the engine room 13, thereby increasing the number of storage batteries that can be installed in the hull 11 and making it possible to perform further trim adjustments towards the stern 11a.

[0056] (10) The ship 1, 101, 201 according to the tenth aspect is any one of the ships 1, 101, 201 of (1) to (9), and further comprises a main engine 20 provided in the engine room 13 and configured to drive the propeller 12 by burning fuel. As a result, even if the engine room 13 is equipped with the main engine 20, which is a heavy load, it is possible to adjust the trim and heel using the batteries housed in the side battery rooms 15, 115, 215 located closer to the bow 11f than the engine room 13. Therefore, it is possible to perform appropriate trim adjustment. [Explanation of symbols]

[0057] 1,101...Vessel 11...Hull 11a...Stern 11f...Bow 12...Propulsion unit 13...Engine room 14...Vehicle storage space 15,115,215...Side battery room 16...Side shell plating 17...Bottom shell plating 18...Deck 18b...Vehicle boarding deck 19...Propeller shaft 20...Main engine 21...Propulsion motor 22,23,24...Transverse bulkhead 26,27...Longitudinal bulkhead 28...Fore bulkhead 30...Inner hull wall 31...Vehicle deck 34,234...Fore battery room 35...Collision bulkhead 40...Flood prevention room 41...Watertight bulkhead 50...Side battery compartment 51...First internal bulkhead 52...Fore battery compartment 53...Second internal bulkhead 54...Third internal bulkhead 60...Storage compartment in front of collision bulkhead

Claims

1. The hull and a propeller provided on the hull; an engine room provided on the stern side of the hull and accommodating a propulsion motor that drives the propeller; a vehicle loading compartment provided within the hull on the bow side of the engine room; a side battery compartment provided along at least one of the port side and starboard side of the hull outside the vehicle mounting compartment in the ship width direction, the side battery compartment being capable of accommodating a battery that supplies power to at least the propulsion motor; a bow-side battery room that is provided between the engine room and a collision bulkhead of the hull, the collision bulkhead being provided on the bow side of the ship opposite the engine room across the vehicle loading compartment, and that houses a battery that can supply power to at least the propulsion motor; A vessel equipped with:

2. a first internal partition dividing the interior of the side battery compartment into a plurality of watertight compartments; 2. The watercraft of claim 1.

3. A second internal bulkhead is provided to divide the interior of the forward battery room into a plurality of watertight compartments.

3. A vessel according to claim 1 or 2.

4. The side battery compartment is provided between a longitudinal bulkhead that defines the outer side of the vehicle loading compartment in the ship width direction and the side shell plating of the hull. A vessel according to any one of claims 1 to 3.

5. The side battery compartment is provided above the inner wall of the hull that forms the double bottom of the hull. A vessel according to any one of claims 1 to 4.

6. A watertight compartment is provided between the engine room and the side battery room in the bow and stern direction. A vessel according to any one of claims 1 to 5.

7. A battery room in front of the collision bulkhead is provided on the bow side of the collision bulkhead to accommodate the battery. A watercraft according to any one of claims 1 to 6.

8. A battery room behind the engine room is provided to accommodate the battery on the stern side of the engine room. A watercraft according to any one of claims 1 to 7.

9. a main engine provided in the engine room and configured to drive the propeller by burning fuel; A watercraft according to any one of claims 1 to 8.

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