Pull-out type marine battery stacking structure

Abstract

The invention discloses a pulling type marine battery stacking structure which comprises a plurality of marine battery stacks spliced side by side, each marine battery stack comprises a plurality of marine battery modules vertically stacked, each marine battery module comprises a shell, the left edge and the right edge of the top surface of each shell are concave downwards to form a front-back through groove respectively, and each groove is provided with a through hole. The left edge and the right edge of the bottom face of the shell protrude downwards respectively to form a protruding strip with the same length as the shell, and the protruding strip and the groove on the same side are matched to form a mortise and tenon joint structure. The mortise and tenon joint structures between the marine battery modules are used for replacing a traditional middle support, the longitudinal space occupied by the thickness and the size of the support is eliminated, the number of batteries capable of being contained in a ship power room is remarkably increased, the battery capacity of a ship is directly improved, and then the cruising ability is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of marine batteries, and in particular to a pull-out marine battery stacking structure. Background Art

[0002] Currently, most commercial ships rely primarily on heavy fuel oil as fuel, and their onboard electrical systems also rely primarily on the combustion of heavy fuel oil to power their vessels. However, the combustion of heavy fuel oil produces pollutants such as aromatic chemicals and carbon dioxide, which are highly harmful to the environment and human health. Furthermore, heavy fuel oil is viscous and difficult to evaporate, posing a serious threat to the marine environment should it leak from a ship. With these factors in mind, new energy vessels are gaining widespread adoption to conserve resources, protect the environment, and promote sustainable development. For example, battery-powered ships typically use high-performance batteries, such as lithium-ion batteries or nickel-metal hydride batteries, to power the vessel. Compared to traditional fuel-powered vessels, battery-powered ships offer advantages such as zero emissions, low noise levels, and low energy consumption, making them a more environmentally friendly and energy-efficient vessel.

[0003] Currently, the industry generally adopts a stacked installation solution for installing marine batteries within a vessel's powerhouse. Because ships are constantly in a state of dynamic sway due to factors such as wave impact and hull pitch during navigation, an intermediate bracket is installed between the stacked marine batteries to prevent relative displacement and collision. This creates a stable overall structure, offsetting the external forces caused by swaying and ensuring the positional stability of the battery pack under various navigation conditions.

[0004] However, the presence of the intermediate brackets introduces a new problem: the intermediate brackets themselves have a certain thickness and volume, inevitably occupying longitudinal space in the stacking direction. Within the limited vertical height of the ship's powerhouse, this space occupation directly compresses the effective area available for battery cell placement. Specifically, the additional height occupied by the intermediate brackets significantly reduces the number of batteries that can be accommodated in each battery stack, thereby limiting the ship's endurance. Summary of the Invention

[0005] In order to overcome the problem in the prior art of stacking and installing marine batteries, in which the number of batteries in each stack is small due to the provision of an intermediate bracket, the present invention provides a pull-out marine battery stacking structure.

[0006] The technical solution of the present invention is as follows: A pull-out marine battery stacking structure comprises several stacks of marine battery stacks spliced ​​side by side, wherein the marine battery stack comprises a plurality of vertically stacked marine battery modules, and the marine battery modules comprise a shell, wherein the left and right edges of the top surface of the shell are concave to form a groove running through the front and back, and the left and right edges of the bottom surface of the shell are convex to form a convex strip with the same length as the shell, and the convex strip on the same side cooperates with the groove to form a mortise and tenon structure.

[0007] As a preferred solution of the present invention, the longitudinal sections of the convex strips and the grooves are both non-right-angled parallelograms or right-angled trapezoids.

[0008] As a preferred solution of the present invention, the hypotenuse of the convex strip is inclined outward, and the outward side wall of the convex strip is provided with a plurality of first avoidance grooves at intervals along its length direction, and a first insertion portion is formed between two adjacent first avoidance grooves, and the outward side wall of the groove is provided with a plurality of second avoidance grooves matching the first insertion portion at intervals along its length direction, the second avoidance grooves correspond to the positions of the first avoidance groove one by one, and a second insertion portion matching the first avoidance groove is formed between two adjacent second avoidance grooves, and the longitudinal sections of the first avoidance groove, the first insertion portion, the second avoidance groove and the second insertion portion are all right triangles.

[0009] As a preferred solution of the present invention, the left and right outer walls of the shell are provided with multiple screw avoidance grooves along their length direction, the top of the screw avoidance groove is provided with a first screw hole that passes through the front and back, and the bottom of the screw avoidance groove is provided with a second screw hole that passes through the front and back and cooperates with the first screw hole.

[0010] As a preferred solution of the present invention, the marine battery stack further includes a fixing bracket, all the vertically stacked marine battery modules are fixed by the fixing bracket, and two adjacent marine battery stacks are fixed by the fixing bracket.

[0011] As a preferred solution of the present invention, the fixing bracket includes a fixing base, two front fixing strips arranged on the left and right sides of the front end of the fixing base, and two rear fixing strips arranged on the left and right sides of the rear end of the fixing base. The left and right edges of the top surface of the fixing base are concave to form a groove that cooperates with the convex strip. The two front fixing strips are fixed to the left and right sides of the front end of the fixing base and all vertically stacked marine battery modules by screws, and the two rear fixing strips are fixed to the left and right sides of the rear end of all vertically stacked marine battery modules by screws. The two adjacent front fixing strips and the two adjacent rear fixing strips are fixed by screws.

[0012] As a preferred solution of the present invention, a first fixing hole is provided on the fixed base to match the battery installation position of the ship's power room, and the bottom of the front fixing strip extends downward to form an extension portion lower than the bottom surface of the fixed base, and a second fixing hole is provided on the extension portion to match the battery installation position of the ship's power room.

[0013] As a preferred embodiment of the present invention, the shell has a accommodating cavity that passes through from front to back, and the marine battery module also includes a battery cell assembly arranged in the accommodating cavity, a front panel arranged on the front side of the accommodating cavity, and a rear panel arranged on the rear side of the accommodating cavity. The battery cell assembly is connected to the front panel and the rear panel to form a whole and can slide back and forth along the accommodating cavity. The front panel is connected to the front end of the shell by screws.

[0014] As a preferred solution of the present invention, T-shaped handles are detachably connected to both the left and right sides of the front panel.

[0015] As a preferred solution of the present invention, the left and right sides of the front panel are both provided with pull-out bolt holes that match the T-shaped handle, and the rear end of the T-shaped handle is provided with studs that match the pull-out bolt holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The mortise and tenon structure between the marine battery modules replaces the traditional intermediate bracket, eliminating the longitudinal space occupied by the thickness and volume of the bracket. This significantly increases the number of batteries that can be accommodated in the ship's power room, directly improving the ship's battery capacity and thus extending its cruising range. This fundamentally overcomes the cruising range limitation caused by the intermediate bracket in the existing technology. At the same time, the mortise and tenon structure achieves zero-gap fastening between the marine battery modules. The stacked modules are formed into a whole through the precise coordination of the ridges and grooves. This can effectively resist dynamic external forces such as wave impact and hull turbulence during navigation, avoid relative displacement and collision, and ensure the positional stability of the battery pack under various navigation conditions. 2. The special structural design of the ridges and grooves, namely the first avoidance groove, the first insertion part, the second avoidance groove, and the second insertion part, enables horizontal and vertical installation, breaking through the limitations of the traditional stacking method on installation direction. It can adapt to the complex and irregular spaces in the ship's power room, improve space utilization, and embody the practicality and flexibility of industrial design. 3. The marine battery module adopts a pull-out front maintenance design. When a battery module fails, you only need to remove the screws between the front panel and the shell to pull out the battery cell assembly, front panel, and rear panel along the accommodating cavity for maintenance. There is no need to remove the faulty marine battery module and all the marine battery modules above it, which greatly shortens the maintenance time, reduces the difficulty and cost of maintenance; 4. By setting a detachable T-shaped handle on the front panel, it can be installed only during maintenance, providing a stable force point for pulling. It can be removed during normal operation to avoid the T-shaped handle taking up extra space or interfering with other components in the power room. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a front view of a pull-out marine battery stacking structure according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a marine battery stack according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a marine battery module according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a housing in one embodiment of the present invention; Figure 5 A schematic structural diagram of a housing from another perspective in one embodiment of the present invention; Figure 6 is a front view of a housing according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure in which the battery cell assembly, the front panel and the rear panel form an integral whole in one embodiment of the present invention; Figure 8 This is a schematic diagram of a state in which the battery cell assembly, the front panel, and the rear panel are pulled out of the housing in one embodiment of the present invention; Figure 9 This is a structural diagram of a fixed base in one embodiment of the present invention; Figure 10 This is a schematic diagram of the state of disassembling the T-shaped handle of the marine battery module in one embodiment of the present invention.

[0019] In the figure, 1. Marine battery stack; 11. Marine battery module; 111. Housing; 1111. Accommodation cavity; 1112. Groove; 1113. Raised strip; 1114. First avoidance groove; 1115. First insertion portion; 1116. Second avoidance groove; 1117. Second insertion portion; 1118. Screw avoidance groove; 1119. First screw hole; 1120. Second screw hole; 112. Battery cell assembly; 113. Front panel; 1131. First pull-out bolt hole; 114. Rear panel; 115. T-handle; 1151. Stud; 116. I-shaped connector; 12. Fixing bracket; 121. Fixing base; 1211. First fixing hole; 122. Front fixing strip; 1221. Extension portion; 1222. Second fixing hole; 123. Rear fixing strip. DETAILED DESCRIPTION

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. It should also be noted that the embodiments described below are intended only to illustrate the present invention and are not intended to limit the present invention.

[0021] It should be noted that the terms "installed", "set", "connected", "fixed" and the like should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium; they can be internal communication between two elements or an interactive relationship between two elements, unless otherwise clearly defined. The orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly defined. "Several" means one or more, unless otherwise clearly defined.

[0022] See also Figures 1 to 8This embodiment provides a pull-out marine battery stack structure, comprising a plurality of stacked, side-by-side marine battery stacks 1. The marine battery stack 1 comprises a plurality of vertically stacked marine battery modules 11. The marine battery modules 11 include a housing 111 having a through-and-through accommodating cavity 1111, a cell assembly 112 disposed within the accommodating cavity 1111, a front panel 113 disposed in front of the accommodating cavity 1111, and a rear panel 114 disposed behind the accommodating cavity 1111. The cell assembly 112 is integrally connected to the front and rear panels 113 and 114, and can slide forward and backward along the accommodating cavity 1111. The front panel 113 is screwed to the front end of the housing 111, ensuring securement during normal operation while also providing a convenient point for quick disassembly during maintenance. When a battery module fails, it is only necessary to remove the screws between the front panel 113 and the outer shell 111, and the battery cell assembly 112, the front panel 113, and the rear panel 114 can be pulled out along the accommodating cavity 1111 for maintenance. This pull-out front maintenance design eliminates the need to remove the failed marine battery module 11 and all the marine battery modules 11 above it, greatly shortening the maintenance time and reducing the difficulty and cost of maintenance.

[0023] The left and right edges of the top surface of the shell 111 are concave, each forming a groove 1112 that runs through the front and back. The left and right edges of the bottom surface of the shell 111 are convex, each forming a ridge 1113 of the same length as the shell 111. The ridges 1113 on the same side cooperate with the grooves 1112 to form a mortise and tenon structure. By replacing the traditional intermediate bracket with the mortise and tenon structure between the marine battery modules 11, the thickness and volume of the brackets that occupy the longitudinal space are eliminated. Within the limited vertical height of the ship's power room, the number of batteries that can be accommodated is significantly increased, directly improving the ship's battery capacity and thus extending its endurance, fundamentally overcoming the endurance limitation caused by intermediate brackets in the prior art. At the same time, the mortise and tenon structure achieves zero-gap fastening between the marine battery modules 11. The stacked modules are formed into a whole through the precise cooperation of the ridges 1113 and the grooves 1112. This can effectively resist dynamic external forces such as wave impact and hull turbulence during navigation, avoid relative displacement and collision, and ensure the positional stability of the battery pack under various navigation conditions.

[0024] See also Figures 3 to 6In one embodiment, the longitudinal sections of the ridge 1113 and the groove 1112 are both right-angled trapezoids, the hypotenuse of the ridge 1113 is inclined outward, and the outward side wall of the ridge 1113 is provided with a plurality of first avoidance grooves 1114 at intervals along its length direction, and a first insertion portion 1115 is formed between two adjacent first avoidance grooves 1114, and the outward side wall of the groove 1112 is provided with a plurality of second avoidance grooves 1116 that cooperate with the first insertion portion 1115 at intervals along its length direction, the second avoidance grooves 1116 correspond to the positions of the first avoidance grooves 1114 one by one, and a second insertion portion 1117 that cooperates with the first avoidance groove 1114 is formed between two adjacent second avoidance grooves 1116, and the longitudinal sections of the first avoidance groove 1114, the first insertion portion 1115, the second avoidance groove 1116 and the second insertion portion 1117 are all right-angled triangles.

[0025] In this embodiment, the special structural design of the ridges 1113 and grooves 1112, namely the first avoidance groove 1114, the first insertion portion 1115, the second avoidance groove 1116, and the second insertion portion 1117, enables horizontal and vertical installation. This breaks through the limitations of traditional stacking methods on installation direction, can adapt to the complex and irregular spaces within the ship's power room, improves space utilization, and embodies the practicality and flexibility of industrial design. Specifically, when installing horizontally, the ridges 1113 of the marine battery module 11 to be installed are horizontally aligned with the grooves 1112 of the already installed marine battery module 11 located directly above. The marine battery module 11 to be installed is then pushed horizontally until it is aligned front to back with the marine battery module 11 below. When installing in the vertical direction, first place the marine battery module 11 to be installed above the installed marine battery module 11 directly above it, and align it left and right, then push the marine battery module 11 to be installed forward or backward, when the first avoidance groove 1114 and the first insertion part 1115 of its convex strip 1113 are respectively aligned with the second insertion part 1117 and the second avoidance groove 1116 of the groove 1112 of the marine battery module 11 below, the marine battery module 11 to be installed will drop under the action of gravity, so that its convex strip 1113 enters the groove 1112 of the marine battery module 11 below, and finally push the marine battery module 11 to be installed horizontally so that it is aligned front and back with the marine battery module 11 below.

[0026] In another embodiment, the longitudinal sections of the ridges 1113 and the grooves 1112 may also be non-rectangular parallelograms. The ridges 1113 and the grooves 1112 may be designed in a non-rectangular parallelogram shape to achieve the same effect as a right-angled trapezoid.

[0027] See also Figures 3 to 5In one embodiment, the left and right outer walls of the housing 111 are each provided with multiple screw-relief slots 1118 along their length. A first screw hole 1119 is defined at the top of each screw-relief slot 1118, extending from front to back. A second screw hole 1120 is defined at the bottom of each screw-relief slot 1118, extending from front to back and mating with the first screw hole 1119. After the upper and lower marine battery modules 11 are initially secured via the mortise and tenon structure of the ridges 1113 and grooves 1112, they are further secured using screws that engage the second screw holes 1120 in the upper marine battery module 11 and the first screw holes 1119 in the lower marine battery module 11, creating a dual-tenon and screw-relief fixation mechanism. Compared to a simple mortise and tenon structure, the additional screw connection further resists external forces such as shear and tension generated by the violent rocking of the ship, preventing loosening between modules due to long-term vibration. This makes the system particularly suitable for harsh sailing conditions (such as stormy weather) and significantly improves the reliability of the overall structure. The design of screw avoidance slots 1118 provides space for screw installation. In actual application, the use of screw reinforcement can be selected based on the severity of the ship's navigation environment: in calm waters, the mortise and tenon structure can be relied upon for simplified installation; in complex waters, screws can be used for enhanced fixation, achieving on-demand reinforcement and improving the structure's adaptability to different scenarios.

[0028] See also Figure 1 In one embodiment, the marine battery stack 1 further includes a fixing bracket 12, through which all vertically stacked marine battery modules 11 are fixed, and two adjacent marine battery stacks 1 are fixed by the fixing bracket 12. The fixing bracket 12 integrates all vertically stacked marine battery modules 11 into a rigid whole, preventing independent displacement of a single battery stack due to shaking. At the same time, adjacent battery stacks are connected by the fixing bracket 12, so that multiple groups of side-by-side battery stacks form a continuous structure, dispersing the external force caused by the rocking of the ship, reducing the load on a single module, and improving the impact resistance of the entire battery system.

[0029] For further information, see Figure 2 、 Figure 9The fixing bracket 12 includes a fixing base 121, two front fixing bars 122 disposed on the left and right sides of the front end of the fixing base 121, and two rear fixing bars 123 disposed on the left and right sides of the rear end of the fixing base 121. The left and right edges of the top surface of the fixing base 121 are recessed to form a groove 1112 that mates with a protrusion 1113. The groove 1112 mates with the protrusion 1113 of the bottommost marine battery module 11 to form a bottom mortise and tenon joint fixation, preventing the entire battery stack from sliding left and right. The two front fixing bars 122 are respectively fixed to the fixing base 121 and the left and right sides of the front end of all vertically stacked marine battery modules 11 with screws. The two rear fixing bars 123 are also fixed to the left and right sides of the rear end of all vertically stacked marine battery modules 11 with screws, forming a longitudinal clamping constraint to resist the fore-and-aft sway of the ship (such as the fore-and-aft pitching of the hull caused by wave impacts) and prevent the battery stack from tilting forward or backward. In addition, the two adjacent front fixing bars 122 and the two adjacent rear fixing bars 123 are fixed by screws, so that the side-by-side battery stacks form a transverse rigid connection through the bracket, transferring the force of multiple battery stacks to the entire bracket system, further dispersing external forces, and are suitable for scenarios where multiple battery stacks are jointly powered on large ships.

[0030] For further information, see Figure 2 、 Figure 9 The fixed base 121 is provided with a first fixing hole 1211 that matches the battery mounting position in the ship's power room. The bottom of the front fixing bar 122 extends downward to form an extension 1221 that is lower than the bottom surface of the fixed base 121. The extension 1221 is provided with a second fixing hole 1222 that matches the battery mounting position in the ship's power room. The first fixing hole 1211 of the fixed base 121 matches the ship's mounting position to secure the bottom of the battery stack to the hull, preventing the battery stack from sliding horizontally or vertically as a whole. The second fixing hole 1222 of the extension 1221 of the front fixing bar 122 is lower than the bottom surface of the fixed base 121. When connected to the hull mounting position, it forms a double fixation up and down, resisting vertical vibration of the battery stack caused by shaking (such as the up and down pitching of the hull), ensuring that the entire battery system and the hull are integrated.

[0031] See also Figure 3In one embodiment, both left and right sides of the front panel 113 are detachably connected with T-shaped handles 115. The T-shaped handle provides a stable force point for pulling, conforms to ergonomic design, and is convenient for the operator to exert force. Compared with directly pulling the edge of the front panel 113, the handle can reduce the risk of hand slippage, especially in scenarios where the space in the ship's power room is narrow and operation is restricted, the battery cell assembly 112 can be quickly pulled out, shortening maintenance time. At the same time, the handles arranged symmetrically on the left and right distribute the pulling force evenly on both sides of the front panel 113, reducing deformation or damage to the front panel 113 caused by single-point force, and extending the service life of the components. In addition, the detachable design of the T-shaped handle 115 allows it to be installed only during maintenance and can be removed during normal operation, avoiding the T-shaped handle 115 taking up extra space or interfering with other components in the power room.

[0032] For further information, see Figure 10 In one embodiment, first pull-out bolt holes 1131 are provided on both the left and right sides of the front panel 113, which mate with the T-shaped handle 115. A stud 1151 is provided at the rear end of the T-shaped handle 115, which mates with the first pull-out bolt holes 1131. The coordinated design of the first pull-out bolt holes 1131 and the stud 1151 ensures the positional accuracy of the T-shaped handle during installation, avoiding uneven pull-out force due to installation deviation. Furthermore, the bolt connection method is simple to operate and can be disassembled and assembled without special tools, improving maintenance efficiency. Furthermore, when the T-shaped handle 115 is not installed, the first pull-out bolt holes 1131 can be sealed with screws to block the connection between the accommodating chamber 1111 and the external environment, preventing seawater, moisture, dust, etc. from entering the accommodating chamber 1111, thereby ensuring the sealing of the marine battery module 11.

[0033] For further information, see Figure 7 、 Figure 8The battery cell assembly 112 is connected to the front panel 113 and the rear panel 114 through multiple I-shaped connectors 116 to form a whole, wherein there are two I-shaped connectors 116 between the battery cell assembly 112 and the front panel 113, which correspond to the positions of the two first pulling bolt holes 1131 respectively. The middle part of the front end of the two I-shaped connectors 116 is provided with a second pulling bolt hole that matches the first pulling bolt hole 1131. When the T-shaped handle 115 is installed, its stud 1151 passes through the first pulling bolt hole 1131 and is connected to the second pulling bolt hole. The I-shaped connector 116 itself has a high structural strength and can firmly connect the battery cell assembly 112, the front panel 113, and the rear panel 114 into a whole; and the cooperation between the second pulling bolt hole and the T-shaped handle stud 1151 allows the pulling force to be directly transmitted to the battery cell assembly 112 through the I-shaped connector 116, avoiding the front panel 113 from bearing the pulling force alone, fundamentally solving the problem of deformation of the front panel 113 due to excessive force when pulling, and is particularly suitable for battery cell assemblies 112 with heavier weight.

[0034] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0035] The above is an exemplary description of the patent of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the patent of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the patent of the present invention, or the concept and technical solution of the patent of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A pull-out marine battery stacking structure, characterized in that: The marine battery stack comprises several stacks of marine battery modules stacked vertically, and the marine battery modules comprise a shell. The left and right edges of the top surface of the shell are concave to form a groove running through the front and back, and the left and right edges of the bottom surface of the shell are convex to form a convex strip with the same length as the shell. The convex strip on the same side cooperates with the groove to form a mortise and tenon structure.

2. The pull-out marine battery stacking structure according to claim 1, characterized in that: The longitudinal sections of the convex strips and the grooves are both non-right-angled parallelograms or right-angled trapezoids.

3. The pull-out marine battery stacking structure according to claim 2, characterized in that: The hypotenuse of the convex strip is inclined outward, and a plurality of first avoidance grooves are arranged at intervals along the length direction of the outward side wall of the convex strip, and a first insertion portion is formed between two adjacent first avoidance grooves. The outward side wall of the groove is arranged at intervals along the length direction of the groove and the plurality of second avoidance grooves matching the first insertion portion are arranged, and the positions of the second avoidance grooves correspond one-to-one to the positions of the first avoidance grooves, and a second insertion portion matching the first avoidance groove is formed between two adjacent second avoidance grooves. The longitudinal sections of the first avoidance groove, the first insertion portion, the second avoidance groove and the second insertion portion are all right triangles.

4. The pull-out marine battery stacking structure according to claim 1, characterized in that: The left and right outer walls of the shell are both provided with multiple screw avoidance grooves along their length direction. The top of the screw avoidance groove is provided with a first screw hole that passes through the front and back, and the bottom of the screw avoidance groove is provided with a second screw hole that passes through the front and back and matches the first screw hole.

5. The pull-out marine battery stacking structure according to claim 1, characterized in that: The marine battery stack further includes a fixing bracket, and all vertically stacked marine battery modules are fixed by the fixing bracket, and two adjacent marine battery stacks are fixed by the fixing bracket.

6. The pull-out marine battery stacking structure according to claim 5, characterized in that: The fixing bracket includes a fixing base, two front fixing strips arranged on the left and right sides of the front end of the fixing base, and two rear fixing strips arranged on the left and right sides of the rear end of the fixing base. The left and right edges of the top surface of the fixing base are concave to form a groove that matches the convex strip. The two front fixing strips are fixed to the left and right sides of the front end of the fixing base and all vertically stacked marine battery modules by screws, and the two rear fixing strips are fixed to the left and right sides of the rear end of all vertically stacked marine battery modules by screws. The two adjacent front fixing strips and the two adjacent rear fixing strips are fixed by screws.

7. The pull-out marine battery stacking structure according to claim 6, characterized in that: The fixed base is provided with a first fixing hole that matches the battery installation position of the ship's power room. The bottom of the front fixing strip extends downward to form an extension portion that is lower than the bottom surface of the fixed base. The extension portion is provided with a second fixing hole that matches the battery installation position of the ship's power room.

8. The pull-out marine battery stacking structure according to claim 1, characterized in that: The shell has a accommodating cavity that passes through from front to back. The marine battery module also includes a battery cell assembly arranged in the accommodating cavity, a front panel arranged on the front side of the accommodating cavity, and a rear panel arranged on the rear side of the accommodating cavity. The battery cell assembly is connected to the front panel and the rear panel to form a whole and can slide back and forth along the accommodating cavity. The front panel is connected to the front end of the shell by screws.

9. The pull-out marine battery stacking structure according to claim 8, characterized in that: The left and right sides of the front panel are detachably connected with T-shaped handles.

10. The pull-out marine battery stacking structure according to claim 9, characterized in that: The left and right sides of the front panel are both provided with pull-out bolt holes that match the T-shaped handle, and the rear end of the T-shaped handle is provided with studs that match the pull-out bolt holes.

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