CN217468617U - Lithium battery pack for underwater vehicle - Google Patents

Abstract

The utility model relates to a lithium cell technical field specifically is a lithium cell group that underwater vehicle used. The battery pack for the high-speed underwater vehicle solves the technical problems that the battery pack for the current high-speed underwater vehicle is required to store enough energy within the specified volume and mass range, and the safety of the battery pack is required to be met in the discharging process. A lithium battery pack used by an underwater vehicle comprises a left large battery module and a right large battery module, wherein a water cooling plate which is vertically arranged is clamped between the two large battery modules; the top and the bottom of the two large battery modules are respectively provided with a top cover and a bottom cover; the top and the bottom of the water cooling plate are respectively fixedly connected with the top cover and the bottom cover. Lithium cell group, can install in the limited underwater vehicle casing of spatial structure, have multiple functions such as anti-vibration impact, protecting against shock, can satisfy the requirement of using for a long time in marine environment. By using the unique liquid cooling structure, the phenomena of combustion, explosion, thermal runaway and the like in the closed space can be effectively prevented, and the safety is high.

Description

Lithium battery pack for underwater vehicle

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell group that underwater vehicle used.

Background

The high-speed underwater vehicle requires that a battery for propulsion has excellent high-rate discharge performance, high mass specific power and volume specific power, and stores enough energy in a specified volume and mass range. The battery pack should ensure safety, should not suffer from combustion, explosion or thermal runaway, and should be easy to install and use and be as inexpensive as possible.

In summary, the underwater vehicle with high navigational speed needs a battery pack system which occupies a small space, has high discharge rate and is safe.

Disclosure of Invention

The utility model discloses a solve present high-speed for the underwater vehicle battery group requirement and store up sufficient energy at the volume of regulation and quality within range, and the group battery still need satisfy the technical problem of security at the in-process that discharges, provide a lithium cell group that the underwater vehicle used.

The utility model discloses an adopt following technical scheme to realize: a lithium battery pack used by an underwater vehicle comprises a left large battery module and a right large battery module, wherein a water cooling plate which is vertically arranged is clamped between the two large battery modules; the top and the bottom of the two large battery modules are respectively provided with a top cover and a bottom cover; the top and the bottom of the water cooling plate are respectively fixedly connected with the top cover and the bottom cover.

The utility model discloses a accompany the structural design of water-cooling board about in the middle of the big battery module, can ensure the heat-sinking capability of battery in limited, compact space, guarantee the firm in connection of group battery simultaneously, ensure the safe in utilization of battery.

Furthermore, one large battery module is divided into an upper small module, a middle small module and a lower small module; the middle small module and the upper and lower small modules are fastened by adopting a middle connecting piece; the positions of the left upper module and the right upper module, which are close to the upper ends, are connected through an upper connecting piece, and the positions of the left lower module and the right lower module, which are close to the lower ends, are connected through a lower connecting piece; and connecting lines among the battery strings in each small module are connected in a welding mode.

The battery pack is designed into an upper small module, a middle small module and a lower small module, so that the heat dissipation effect and the installation stability are improved; if a certain single battery is damaged, the workload of disassembly and repair can be properly reduced.

Furthermore, each small module comprises an electric core formed by combining a plurality of strings of single batteries and a bracket for fixing the electric core, an opening is formed in one side, facing the water cooling plate, of the bracket, and a copper sheet and a radiating fin fixing frame are sequentially mounted on the side face of the electric core at the opening; the battery cell top is fixed with the upper fixed frame with leg joint, and the battery cell below is fixed with the lower fixed frame with leg joint, and a protective cover is installed at the top of upper fixed frame, and a protective cover is installed to the bottom of lower fixed frame. One side edge of the copper sheet is designed into a flanged leading-out end, the leading-out end is contacted with the water cooling plate to fix the battery cell through the support, and meanwhile, the upper and lower fixing frames and the protective cover are also designed, so that the battery pack has better impact resistance and vibration resistance.

Each small battery module is provided with a copper sheet for heat dissipation, and the copper sheet is contacted with the water cooling plate through the leading-out end, so that the heat dissipation capacity of the small battery module can be further improved.

The utility model has the advantages that: 1. lithium cell group, can install in the limited underwater vehicle casing of spatial structure, have multiple functions such as anti-vibration impact, protecting against shock, can satisfy the requirement of using for a long time in marine environment.

2. The unique liquid cooling structure is used, so that the phenomena of combustion, explosion, thermal runaway and the like in the closed space can be effectively prevented, and the safety is high.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the installation of the present invention.

FIG. 3 is a schematic view of the small module installation.

1-a water cooling plate, 2-a top cover, 3-a bottom cover, 4-a middle connecting piece, 5-an upper connecting piece, 6-a lower connecting piece, 7-an electric core, 8-a bracket, 9-a copper sheet, 10-a radiating fin fixing frame, 11-an upper fixing frame, 12-a lower fixing frame and 13-a protective cover.

Detailed Description

As shown in fig. 1 and 2, a lithium battery pack for an underwater vehicle comprises a left large battery module and a right large battery module, wherein a vertically arranged water cooling plate 1 is clamped between the two large battery modules; the top and the bottom of the two large battery modules are respectively provided with a top cover 2 (two in total) and a bottom cover 3 (two in total); the top and the bottom of the water cooling plate 1 are respectively fixedly connected with the top cover 2 and the bottom cover 3; one large battery module is divided into an upper small module, a middle small module and a lower small module; the middle small module and the upper and lower small modules are fastened by adopting a middle connecting piece 4; the positions of the left upper module and the right upper module, which are close to the upper ends, are connected through an upper connecting piece 5, and the positions of the left lower module and the right lower module, which are close to the lower ends, are connected through a lower connecting piece 6; the middle connecting piece 4 consists of an upper connecting piece and a lower connecting piece which are parallel to each other and a middle mounting plate for connecting the upper connecting piece and the lower connecting piece; the upper and lower connecting pieces are provided with screw holes and connected with the upper and lower adjacent small modules through bolts. The support adopts aluminium alloy 7A09 material, and top cap 2 adopts magnalium alloy material, and bottom 3 adopts aluminium alloy 7A09 material, and the surface is spouted teflon, is insulating, anticorrosive treatment. As shown in fig. 3, each small module includes a battery core 7 (single batteries are all vertical and then arranged in parallel) composed of multiple strings of single batteries, and a bracket 8 for fixing the battery core, the bracket 8 is a cubic frame structure, one side of the bracket 8 facing the water cooling plate 1 is provided with an opening (as shown in fig. 3, a crosspiece on the right side is removed, and a crosspiece on the left side is retained), and a copper sheet 9 and a heat sink fixing frame 10 are sequentially installed on the side surface of the battery core 7 at the opening; an upper fixing frame 11 connected with the support 8 is fixed above the battery cell, a lower fixing frame 12 connected with the support 8 is fixed below the battery cell 7, a protective cover 13 is installed at the top of the upper fixing frame 11, and a protective cover 13 is installed at the bottom of the lower fixing frame 12; and connecting lines among the battery strings in each small module are connected in a welding mode. One side edge of the copper sheet 9 is designed into a flanged leading-out end (the position indicated by the reference numeral 9 in figure 3), and the leading-out end bypasses the heat radiating fin fixing frame from the side surface to be contacted with the water cooling plate 1. The upper edge and the lower edge of the radiating fin fixing frame are connected with the bracket through bolts, and the copper sheet is clamped on the side surface of the battery cell; the water cooling plate is connected with an external circulating cooling pipeline.

The water cooling plate comprises a water cooling plate, wherein a copper sheet with the thickness of 0.3mm is used between every two battery cores, the copper sheet is used for leading out heat under the action of the copper sheet, the leading-out ends are turned over, each leading-out end of the copper sheet is fixed by a fixing block, the leading-out ends can be effectively contacted with the water cooling plate, the two modules share one set of water cooling plate, the water cooling plate is composed of 15 through holes in total, and the inner wall of the water cooling plate is of a sawtooth structure so as to increase the contact area of water.

Referring to fig. 1-3, the bracket is made of aluminum alloy 7a 09; the top cover 2 and the bottom cover 3 are connected with the bracket 8 of the corresponding small module through fasteners; the adjacent end parts of the two top covers 2 are overlapped up and down and connected through bolts, and are connected with the top end of the water cooling plate 1; the adjacent end parts of the two bottom covers 3 are overlapped up and down and connected through bolts and are connected with the bottom end of the water cooling plate 1; the upper connecting piece 5 and the lower connecting piece 6 are connected with the bracket 8 corresponding to the left small module and the right small module through fasteners, and the fasteners adopt bolts, gaskets and elastic cushions; the bolt connecting position of the middle connecting piece 4 is also arranged on the bracket of the corresponding small module; the upper and lower fixing frames are bonded with the battery cell 7 through structural silica gel.

The utility model has the characteristics of as follows:

1. salt spray resistance design

After the metal materials (support, top cover and bottom cover) forming the battery pack are machined, a Teflon protective layer is sprayed on the surface of the metal materials, so that the battery pack is protected from being damaged by a salt spray environment.

2. Anti-vibration design

The single batteries are bonded with the upper fixing seat and the lower fixing seat by structural silica gel, so that the single batteries in the battery pack module cannot fall off under the vibration condition; the battery module is fixed by adopting an upper aluminum alloy connecting piece and a lower aluminum alloy connecting piece, and the fastener adopts the anti-loosening design of a bolt, a gasket and an elastic cushion, so that the battery module is ensured not to be loosened under the vibration condition; and each connecting cable in the battery pack is welded, so that the cable cannot fall off due to vibration.

3. Anti-impact design

Group battery support and bottom all adopt high strength aluminum alloy 7A09 material, and the top cap adopts magnesium-aluminum alloy material, uses the high performance bolt to improve the protecting against shock performance simultaneously.

4. Design for preventing thermal runaway

The battery pack adopts a liquid cooling scheme, the copper sheets are used for leading out heat, the leading-out end of each copper sheet can be effectively contacted with the water cooling plate, the inner wall of the water cooling plate adopts a sawtooth structure to increase the contact area of water, the heat generated by high-rate discharge of the battery pack is facilitated to be brought away, the heat accumulation is reduced, and the heat productivity is effectively reduced.

Claims (9)

1. A lithium battery pack used by an underwater vehicle is characterized by comprising a left large battery module and a right large battery module, wherein a water cooling plate (1) which is vertically arranged is clamped between the two large battery modules; the top and the bottom of the two large battery modules are respectively provided with a top cover (2) and a bottom cover (3); the top and the bottom of the water cooling plate (1) are respectively fixedly connected with the top cover (2) and the bottom cover (3).

2. The lithium battery pack for an underwater vehicle according to claim 1, wherein one large battery module is divided into three small modules, namely an upper small module, a middle small module and a lower small module; the middle small module and the upper and lower small modules are fastened by adopting a middle connecting piece (4); the positions of the left upper module and the right upper module, which are close to the upper end, are connected through an upper connecting piece (5), and the positions of the left lower module and the right lower module, which are close to the lower end, are connected through a lower connecting piece (6).

3. The lithium battery pack for use in underwater vehicles according to claim 2, characterized in that said intermediate connection element (4) consists of an upper and a lower connection tab parallel to each other and a central mounting plate connecting the upper and the lower connection tabs; the upper and lower connecting pieces are provided with screw holes and connected with the upper and lower adjacent small modules through bolts.

4. The lithium battery pack for the underwater vehicle according to claim 3, wherein each small module comprises an electric core (7) formed by combining a plurality of strings of single batteries and a bracket (8) for fixing the electric core, an opening is formed in one side, facing the water cooling plate (1), of the bracket (8), and a copper sheet (9) and a heat sink fixing frame (10) are sequentially installed on the side face of the electric core (7) at the opening; an upper fixing frame (11) connected with the support (8) is fixed above the battery cell, a lower fixing frame (12) connected with the support (8) is fixed below the battery cell (7), a protective cover (13) is installed at the top of the upper fixing frame (11), and a protective cover (13) is installed at the bottom of the lower fixing frame (12); and connecting lines among the battery strings in each small module are connected in a welding mode.

5. The lithium battery pack for an underwater vehicle according to claim 4, characterized in that one side edge of the copper sheet (9) is designed as a flanged lead-out, which is in contact with the water-cooled plate (1).

6. The lithium battery pack for an underwater vehicle according to claim 5, characterized in that the copper sheet (9) has a thickness of 0.3 mm.

7. The lithium battery pack for an underwater vehicle according to any of the claims from 3 to 6, characterized in that the bracket (8) is made of aluminium alloy 7A 09; the top cover (2) and the bottom cover (3) are connected with the bracket (8) of the corresponding small module through fasteners; the adjacent end parts of the two top covers (2) are overlapped up and down and connected through bolts, and are connected with the top end of the water cooling plate (1); the adjacent end parts of the two bottom covers (3) are overlapped up and down and connected through a bolt, and are connected with the bottom end of the water cooling plate (1); the upper connecting piece (5) and the lower connecting piece (6) are connected with the bracket (8) corresponding to the left small module and the right small module through fasteners, and the fasteners adopt bolts, gaskets and elastic cushions; the bolt connecting position of the middle connecting piece (4) is also arranged on the bracket of the corresponding small module; the upper and lower fixing frames are bonded with the battery cell (7) through structural silica gel.

8. Lithium battery pack for an underwater vehicle according to any of the claims from 1 to 6, characterized in that the water-cooled plate (1) is provided with 15 through holes, the inner walls of which are of a saw-tooth structure.

9. The lithium battery pack for an underwater vehicle according to any of claims 1 to 6, wherein the top cover (2) is made of magnesium aluminum alloy, the bottom cover (3) is made of aluminum alloy 7A09, and the surfaces of the top cover (2) and the bottom cover (3) are sprayed with Teflon.

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