Shell structure of marine battery pack

Abstract

The utility model belongs to a marine battery pack shell structure in the technical field of marine power batteries. The bottom protection plate (2) is of a hollow plate structure, protection plate screw holes (6) are formed in the bottom protection plate (2), the length and the width of the foam layer (3) are smaller than those of the bottom protection plate (2), the length and the width of the liquid cooling plate (4) are smaller than those of the bottom protection plate (2), the length and the width of the liquid cooling plate (2) are larger than those of the foam layer (3), a plurality of semicircular screw receding grooves (7) are formed in the side edge of the liquid cooling plate (4), and a plurality of partition plates (8) are arranged in the shell outer frame (5). The marine battery pack shell structure disclosed by the utility model is simple in structure, and on the premise of effectively ensuring the thermal management performance of a battery, the structure is simplified, the battery pack is ensured to be conveniently and reliably connected, the liquid cooling plate is prevented from occupying too much space, and the internal space of the battery pack is saved, so that the energy density of the battery pack is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship power batteries, and more specifically, relates to a shell structure of a ship battery pack. Background Art

[0002] In the development of the new energy industry, a reasonable thermal management solution for the battery pack is particularly important for the safety and lightweight of the entire pack. Most of the existing thermal management solutions for battery packs are to set up the liquid cooling plate and the shell separately, and then the liquid cooling plate and the shell are fixed together by screws. Since the existing liquid cooling plate itself is welded by harmonica tubes, inlet and outlet water pipes, mounting brackets and other parts, the overall structure is complex. After the battery pack is formed, the liquid cooling plate is in the style of a harmonica tube, and metal pipelines need to be added. The space utilization is poor, the battery pack integration is relatively low, and the energy density is low.

[0003] There is a technology named "a liquid-cooled battery pack shell" and the publication number is "CN205104538U" in the prior art. This technology provides a liquid-cooled battery pack shell, including a shunt pipe, a manifold, two delivery pipes, two collecting pipes and two cooling plates. The shunt pipe, the manifold, the delivery pipe, the collecting pipe and the cooling plate are all hollow structures. The shunt pipe, the manifold, the delivery pipe and the collecting pipe are all open at one end and closed at the other end. The open end of the delivery pipe is connected to the first connection port of the shunt pipe, the open end of the collecting pipe is connected to the second connection port of the manifold, the fifth connection port of the cooling plate is connected to the third connection port of the delivery pipe, the sixth connection port of the cooling plate is connected to the fourth connection port of the collecting pipe, and a battery pack placement slot is provided on one side of the cooling plate. The liquid-cooled battery pack shell of the utility model has a simple structure and good cooling effect. It can quickly reduce the temperature of the battery pack, which is beneficial to prolonging the service life of the battery pack.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a marine battery pack shell structure is provided which has a simple structure and effectively simplifies the structure while effectively ensuring the thermal management performance of the battery, ensures that the battery pack can be conveniently and reliably connected, avoids the liquid cooling plate from occupying too much space, saves the internal space of the battery pack, and thus improves the energy density of the battery pack.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is:

[0007] The utility model discloses a shell structure of a battery pack for a ship, comprising a bottom guard plate, a foam layer, a liquid cooling plate and a shell outer frame. The bottom guard plate is a hollow plate structure, guard plate screw holes are arranged on the bottom guard plate, the length and width of the foam layer are smaller than the bottom guard plate, the length and width of the liquid cooling plate are smaller than the bottom guard plate, the length and width of the liquid cooling plate are larger than the foam layer, a plurality of semicircular screw avoidance grooves are arranged on the side of the liquid cooling plate, and a plurality of partitions are arranged in the shell outer frame.

[0008] The upper part of the bottom guard plate is fitted with a foam layer, the upper part of the foam layer is fitted with a liquid cooling plate, and the upper part of the liquid cooling plate is fitted with a shell outer frame.

[0009] The lower surface of the shell outer frame is provided with a lower screw hole of the outer frame, and the marine battery pack shell structure also includes screws, which pass through the screw holes of the bottom guard plate and the screw avoidance grooves of the liquid cooling plate and are screwed and connected with the lower screw holes of the outer frame.

[0010] The liquid cooling plate is provided with a liquid inlet hole and a liquid outlet hole, the liquid inlet hole is connected to multiple liquid inlet channels in the liquid cooling plate, the liquid outlet hole is connected to multiple liquid return channels in the liquid cooling plate, and each liquid inlet channel is connected to a liquid return channel.

[0011] A liquid inlet pipe and a liquid outlet pipe are arranged on the outer frame of the shell. The liquid inlet pipe is connected to the liquid inlet hole, and the liquid outlet pipe is connected to the liquid outlet hole.

[0012] The screws are hot-melt self-tapping screws, and the screw holes of the guard plate and the screw holes under the outer frame are structures formed after the screws are hot-melted and penetrated.

[0013] The upper part of the shell outer frame is provided with outer frame upper screw holes.

[0014] The shell outer frame and the plurality of partitions divide the shell outer frame into a plurality of battery placement cavities, and a group of battery modules is placed in each placement cavity.

[0015] The bottom guard plate, liquid cooling plate and shell outer frame are all structures made of metal materials.

[0016] The technical solution of the utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The shell structure of the marine battery pack described in the utility model is made of a bottom guard plate, a foam layer, a liquid cooling plate, and a shell outer frame. The bottom guard plate is a hollow plate structure. The bottom guard plate is provided with guard plate screw holes. The length and width of the foam layer are smaller than the bottom guard plate. The length and width of the liquid cooling plate are smaller than the bottom guard plate. The length and width of the liquid cooling plate are larger than the foam layer. A plurality of semicircular screw avoidance grooves are provided on the side of the liquid cooling plate. A plurality of partitions are provided inside the shell outer frame. Then, the bottom guard plate, the foam layer, the liquid cooling plate, and the shell outer frame need to be combined to form the shell structure of the marine battery pack. When combined, the upper part of the bottom guard plate is fitted with the foam layer, the upper part of the foam layer is fitted with the liquid cooling plate, and the upper part of the liquid cooling plate is fitted with the shell outer frame. The lower surface of the shell outer frame is provided with screw holes under the outer frame. The shell structure of the marine battery pack also includes screws. The screws pass through the screw holes of the bottom guard plate and the screw avoidance grooves of the liquid cooling plate and are screwed and connected with the screw holes under the outer frame. In this way, the shell structure of the marine battery pack is formed, the components are reliably connected, the structure is simplified, and there are no complicated components, which effectively saves the internal space of the battery pack and improves the energy density of the battery pack; because the liquid cooling plate does not need to be set up with many pipelines, the liquid cooling plate and the pipelines do not need to be fixed with screws, which not only saves battery pack space, but also simplifies the connection structure and improves the connection reliability and installation accuracy of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a schematic diagram of the exploded structure of the shell structure of the marine battery pack according to the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the liquid cooling plate of the marine battery pack shell structure described in the utility model;

[0021] The marks in the accompanying drawings are respectively: 1. screw; 2. bottom guard plate; 3. foam layer; 4. liquid cooling plate; 5. shell frame; 6. guard plate screw hole; 7. screw avoidance groove; 8. partition; 9. screw hole on the outer frame; 11. liquid inlet hole; 12. liquid outlet hole; 13. liquid inlet channel; 14. liquid return channel; 15. liquid inlet pipe; 16. liquid outlet pipe; 17. placement cavity. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connection relationships of the components involved, the functions and working principles of the components, etc., by referring to the accompanying drawings:

[0023] As attached Figure 1 , Attachment Figure 2As shown, the utility model is a shell structure of a marine battery pack, including a bottom guard plate 2, a foam layer 3, a liquid cooling plate 4, and a shell outer frame 5. The bottom guard plate 2 is a hollow plate structure, and a guard plate screw hole 6 is arranged on the bottom guard plate 2. The length and width of the foam layer 3 are smaller than the bottom guard plate 2, and the length and width of the liquid cooling plate 4 are smaller than the bottom guard plate 2. The length and width of the liquid cooling plate 4 are larger than the foam layer 3. A plurality of semicircular screw avoidance grooves 7 are arranged on the side of the liquid cooling plate 4, and a plurality of partitions 8 are arranged in the shell outer frame 5. The above structure proposes an improved technical solution in view of the deficiencies in the prior art. The above structure proposes an improved technical solution in view of the deficiencies in the prior art. When setting up the structure, the bottom guard plate 2, the foam layer 3, the liquid cooling plate 4, and the shell outer frame 5 are made separately. The bottom guard plate 2 is a hollow plate structure. The guard plate screw hole 6 is set on the bottom guard plate 2. The length and width of the foam layer 3 are smaller than the bottom guard plate 2. The length and width of the liquid cooling plate 4 are smaller than the bottom guard plate 2. The length and width of the liquid cooling plate 2 are larger than the foam layer 3. A plurality of semicircular screw avoidance grooves 7 are set on the side of the liquid cooling plate 4, and a plurality of partitions 8 are set in the shell outer frame 5. Then, the bottom guard plate 2, the foam layer 3, the liquid cooling plate 4, and the shell outer frame 5 need to be combined to form the shell structure of the marine battery pack. When combined, the foam layer 3 is set on the upper part of the bottom guard plate 2, the liquid cooling plate 4 is set on the upper part of the foam layer 3, and the shell outer frame 5 is set on the upper part of the liquid cooling plate 4. The lower surface of the outer frame 5 of the shell is provided with screw holes under the outer frame, and the shell structure of the marine battery pack also includes screws 1. The screws 1 pass through the screw holes 6 of the bottom guard plate 2 and the screw avoidance grooves 7 of the liquid cooling plate 4 and are screwed and connected with the screw holes under the outer frame. In this way, the shell structure of the marine battery pack is formed, and the components are reliably connected, the structure is simplified, and there are no complicated components, which effectively saves the internal space of the battery pack and improves the energy density of the battery pack; because the liquid cooling plate does not need to be provided with many pipelines, the liquid cooling plate and the pipeline do not need to be fixed with screws, which not only saves the battery pack space, but also simplifies the connection structure, and improves the connection reliability and installation accuracy of the battery pack. The shell structure of the marine battery pack described in the utility model has a simple structure. On the premise of effectively ensuring the thermal management performance of the battery, the structure is simplified to ensure that the battery pack can be conveniently and reliably connected, avoid the liquid cooling plate from occupying too much space, save the internal space of the battery pack, and thus improve the energy density of the battery pack.

[0024] The foam layer 3 is bonded to the upper part of the bottom guard plate 2, the liquid cooling plate 4 is bonded to the upper part of the foam layer 3, and the shell outer frame 5 is bonded to the upper part of the liquid cooling plate 4. In the above structure, the foam layer 3 is a foam material, which plays a role of heat insulation, buffering and flame retardancy, and improves the overall performance of the battery pack.

[0025] The lower surface of the shell outer frame 5 is provided with a screw hole under the outer frame, and the shell structure of the marine battery pack also includes a screw 1, which passes through the screw hole 6 of the bottom guard plate 2 and the screw avoidance groove 7 of the liquid cooling plate 4 and is screwed and connected with the screw hole under the outer frame. In the above structure, the length and width of the foam layer 3 are smaller than the bottom guard plate 2, the length and width of the liquid cooling plate 4 are smaller than the bottom guard plate 2, and the length and width of the liquid cooling plate 2 are larger than the foam layer 3. In this way, when connected by screws, the foam layer is sandwiched between the bottom guard plate and the liquid cooling plate, and the edge shrinks inward at the bottom of the liquid cooling plate. When connected, the foam layer will not hinder the screw, and the liquid cooling plate does not need to be provided with a screw hole, but only a screw avoidance groove 7 is provided. The screw avoidance groove 7 is a semicircular structure, which not only ensures that the screw can pass reliably, but also realizes the limit of the screw on the liquid cooling plate, and does not affect the reliable connection between the screw 1 and the shell outer frame 5.

[0026] The liquid cooling plate 4 is provided with a liquid inlet hole 11 and a liquid outlet hole 12. The liquid inlet hole 11 is connected to multiple liquid inlet channels 13 in the liquid cooling plate 4. The liquid outlet hole 12 is connected to multiple liquid return channels 14 in the liquid cooling plate 4. Each liquid inlet channel 13 is connected to a liquid return channel 14. The shell outer frame 5 is provided with a liquid inlet pipe 15 and a liquid outlet pipe 16. The liquid inlet pipe 15 is connected to the liquid inlet hole 11, and the liquid outlet pipe 16 is connected to the liquid outlet hole 12. The above structure improves the structure of the liquid cooling plate 4. The liquid cooling plate 4 is no longer connected by a large number of pipes to realize the circulation of the coolant. The liquid cooling plate 4 is formed by plate stamping. After the shell is assembled and formed, when the battery needs to be cooled during use, the coolant enters from the liquid inlet pipe 15, and then enters the cold liquid plate 4 through the liquid inlet hole 11, and then the coolant is dispersed to multiple liquid inlet channels 13, and the multiple liquid inlet channels 13 cover part of the cold liquid plate 4, and then the coolant enters multiple liquid return channels 14, and then flows out of the liquid outlet hole 12, and then enters the liquid outlet pipe 16, so as to realize the reliable circulation of the coolant in the liquid cold plate 4 and ensure the cooling of the battery module in the outer frame of the shell.

[0027] The screw 1 is a hot-melt self-tapping screw, and the guard plate screw hole 6 and the lower screw hole of the outer frame are both structures formed after the screw 1 is hot-melted and penetrated. In the above structure, the guard plate screw hole 6 on the bottom guard plate and the lower screw hole of the outer frame on the shell outer frame do not need to be processed separately, but when connected by hot-melt self-tapping screws, the hot melt penetrates through the bottom guard plate to form the guard plate screw hole 6, and the hot melt penetrates through the shell outer frame to form the lower screw hole of the outer frame, thereby realizing the connection of the screw to the bottom frame and other components.

[0028] The upper part of the shell outer frame 5 is provided with an outer frame upper screw hole 9. In the above structure, an upper cover plate is provided on the upper part of the shell outer frame 5, and screws are connected with the outer frame upper screw holes 9 through the through holes of the upper cover plate to achieve the closure of the upper part of the shell, ensuring that the battery module is reliably positioned inside the battery shell.

[0029] The shell frame 5 and the plurality of partitions 8 divide the shell frame 5 into a plurality of battery placement chambers 17, and a group of battery modules are placed in each placement chamber 17. In the above structure, each shell structure includes a partition, which also includes a plurality of placement chambers, and thus also includes a plurality of battery modules.

[0030] The bottom guard plate 2, the liquid cooling plate 4, and the outer shell frame 5 are all made of metal materials. The above structure ensures that the strength of the battery pack shell meets the requirements after the above components are assembled and connected.

[0031] The shell structure of the battery pack for ship described in the utility model is that when the structure is set, the bottom guard plate 2, the foam layer 3, the liquid cooling plate 4, and the shell outer frame 5 are made separately. The bottom guard plate 2 is a hollow plate structure, and the guard plate screw hole 6 is set on the bottom guard plate 2. The length and width of the foam layer 3 are smaller than the bottom guard plate 2, the length and width of the liquid cooling plate 4 are smaller than the bottom guard plate 2, and the length and width of the liquid cooling plate 2 are larger than the foam layer 3. A plurality of semicircular screw avoidance grooves 7 are set on the side of the liquid cooling plate 4, and a plurality of partitions 8 are set in the shell outer frame 5. The bottom guard plate 2, the foam layer 3, the liquid cooling plate 4, and the shell outer frame 5 need to be combined to form the shell structure of the battery pack for ship. When combined, the foam layer 3 is set on the upper part of the bottom guard plate 2, the liquid cooling plate 4 is set on the upper part of the foam layer 3, and the shell outer frame 5 is set on the upper part of the liquid cooling plate 4. The lower surface of the shell outer frame 5 is provided with a screw hole under the outer frame, and the shell structure of the marine battery pack also includes a screw 1, which passes through the screw hole 6 of the bottom guard plate 2 and the screw avoidance groove 7 of the liquid cooling plate 4 and is screwed and connected with the screw hole under the outer frame. In this way, the shell structure of the marine battery pack is formed, and the components are reliably connected, the structure is simplified, there are no complicated components, the internal space of the battery pack is effectively saved, and the energy density of the battery pack is improved; since the liquid cooling plate does not need to be provided with many pipelines, the liquid cooling plate 4 and the pipeline do not need to be fixed with screws, which not only saves the battery pack space, but also simplifies the connection structure and improves the connection reliability and installation accuracy of the battery pack.

[0032] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A marine battery pack housing structure, characterized in that: The invention comprises a bottom guard plate (2), a foam layer (3), a liquid cooling plate (4), and a shell outer frame (5); the bottom guard plate (2) is a hollow plate structure; guard plate screw holes (6) are arranged on the bottom guard plate (2); the length and width of the foam layer (3) are smaller than the bottom guard plate (2); the length and width of the liquid cooling plate (4) are smaller than the bottom guard plate (2); the length and width of the liquid cooling plate (4) are larger than the foam layer (3); a plurality of semicircular screw avoidance grooves (7) are arranged on the side of the liquid cooling plate (4); and a plurality of partition plates (8) are arranged inside the shell outer frame (5).

2. The marine battery pack housing structure according to claim 1, characterized in that: The upper part of the bottom guard plate (2) is fitted with a foam layer (3), the upper part of the foam layer (3) is fitted with a liquid cooling plate (4), and the upper part of the liquid cooling plate (4) is fitted with a shell outer frame (5).

3. The marine battery pack housing structure according to claim 1 or 2, characterized in that: The lower surface of the shell outer frame (5) is provided with an outer frame lower screw hole, and the marine battery pack shell structure further comprises a screw (1), which passes through a screw hole (6) of the bottom guard plate (2) and a screw avoidance groove (7) of the liquid cooling plate (4) and is screwed and connected with the outer frame lower screw hole.

4. The marine battery pack housing structure according to claim 1 or 2, characterized in that: The liquid cooling plate (4) is provided with a liquid inlet hole (11) and a liquid outlet hole (12); the liquid inlet hole (11) is connected to a plurality of liquid inlet channels (13) in the liquid cooling plate (4); the liquid outlet hole (12) is connected to a plurality of liquid return channels (14) in the liquid cooling plate (4); each liquid inlet channel (13) is connected to a liquid return channel (14).

5. The marine battery pack housing structure according to claim 4, characterized in that: A liquid inlet pipe (15) and a liquid outlet pipe (16) are provided on the shell outer frame (5); the liquid inlet pipe (15) is connected to the liquid inlet hole (11), and the liquid outlet pipe (16) is connected to the liquid outlet hole (12).

6. The marine battery pack housing structure according to claim 3, characterized in that: The screw (1) is a hot-melt self-tapping screw, and the guard plate screw hole (6) and the screw hole under the outer frame are both structures formed after the screw (1) is hot-melted and penetrated.

7. The marine battery pack housing structure according to claim 1 or 2, characterized in that: The upper portion of the shell outer frame (5) is provided with outer frame upper screw holes (9).

8. The marine battery pack housing structure according to claim 1 or 2, characterized in that: The shell outer frame (5) and the plurality of partitions (8) divide the shell outer frame (5) into a plurality of battery placement cavities (17), and a group of battery modules is placed in each placement cavity (17).

9. The marine battery pack housing structure according to claim 1 or 2, characterized in that: The bottom guard plate (2), the liquid cooling plate (4), and the shell outer frame (5) are all structures made of metal materials.

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