Underwater propeller battery with pressure-resistant waterproof function

Abstract

The utility model discloses an underwater propeller battery with voltage resistance and waterproof function, including rectangular battery shell and the battery module encapsulated in the shell, the battery shell is by cylindrical metal inner cover and two end covers sealed connection constitution, the end cover is fixed with metal inner cover end portion through the flange, be provided with the stepped double compound sealing structure between the end face of metal inner cover and flange, the outer wall of metal inner cover is spaced apart and is provided with at least three T shaped support column along the axial direction, the bottom of each T shaped support column is fixed with metal inner wall welding, and the top of each T shaped support column is butted on the inner wall of battery shell. Stepped double compound sealing structure forms double waterproof barrier, and cooperates bolt connection and stress release groove of flange even distribution, and the sealing reliability is improved greatly, and the underwater pressure deformation is effectively resisted, and the air tightness detection valve is built -in waterproof air permeable membrane balance air pressure and block water.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an underwater propulsion battery with pressure resistance and waterproof function. Background Technology

[0002] In the field of underwater equipment, the endurance and operational stability of underwater thrusters depend heavily on battery performance. Existing underwater thruster batteries generally suffer from problems such as insufficient pressure resistance, sealing failure, and poor heat dissipation: traditional battery casings often employ rectangular structures, which are prone to deformation in deep water environments due to uneven pressure distribution, affecting the safety of the internal battery modules; sealing structures are mostly single-ring designs, which are susceptible to water leakage due to wear or assembly errors during long-term underwater operation, causing short circuits; the heat dissipation system lacks efficient airflow design, making it difficult to quickly dissipate the heat generated during battery operation, easily leading to capacity decay or even thermal runaway; simultaneously, existing structures lack sufficient support, and long-term use can easily lead to stress concentration causing casing cracks, and the lack of convenient airtightness and condition monitoring methods makes it difficult to monitor battery operating status in real time, severely limiting the operating depth and service life of underwater thrusters. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides an underwater propulsion battery with pressure resistance and waterproof function, which can effectively solve the problems mentioned in the background technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An underwater propulsion battery with pressure resistance and waterproof function includes a rectangular battery housing and a battery module encapsulated in the housing. The battery housing is composed of a cylindrical metal inner sleeve and two end caps that are sealed together. The end caps are welded to the end of the metal inner sleeve by a flange. A stepped double composite sealing structure is provided between the end faces of the metal inner sleeve and the flange.

[0006] The stepped double composite sealing structure includes an annular stepped groove on the end face of the metal inner sleeve, a main sealing ring embedded in the annular stepped groove, and a cured sealant layer coated on the mating surface of the flange and the metal inner sleeve.

[0007] The outer wall of the metal inner sleeve is provided with at least three T-shaped support columns spaced axially. The bottom of each T-shaped support column is welded and fixed to the inner wall of the metal inner sleeve, and the top of each T-shaped support column abuts against the inner wall of the battery casing.

[0008] As a further description of the above technical solution, an airtightness detection valve is embedded in the center of the end cap, the airtightness detection valve has a built-in waterproof and breathable membrane, and an LED indicator and a light guide column are provided on the side of the airtightness detection valve.

[0009] As a further description of the above technical solution, the top large-diameter end of the T-shaped support column is provided with an arc-shaped transition surface.

[0010] As a further description of the above technical solution, an annular cooling channel is provided between the battery module and the metal inner sleeve, and the end cover is provided with an inlet channel and an outlet channel communicating with the cooling channel, and a filter screen is embedded in the inlet channel.

[0011] As a further description of the above technical solution, a spiral guide vane is provided in the cooling channel, and the spiral angle of the spiral guide vane is less than 35°.

[0012] As a further description of the above technical solution, the outer surface of the metal inner sleeve is provided with a nano-ceramic coating, the thickness of which is 20-50μm.

[0013] As a further description of the above technical solution, the flange has 8-12 bolt holes evenly distributed around its circumference, and stress relief grooves are provided between adjacent bolt holes.

[0014] As a further description of the above technical solution, the LED indicator extends to the outer surface of the end cover through a light guide post, and the assembly gap between the light guide post and the end cover is filled with transparent sealant.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The underwater propulsion battery of this utility model, which has pressure-resistant and waterproof functions, has at least one of the following beneficial effects during use:

[0017] For sealing and pressure resistance, the stepped double composite sealing structure forms a double waterproof barrier. Combined with evenly distributed bolt connections and stress relief grooves on the flange, this significantly improves sealing reliability. The cylindrical metal inner sleeve and axial T-shaped support column form a rigid support system, while the top arc-shaped transition surface reduces stress concentration and effectively resists underwater pressure deformation. Status monitoring is convenient; the airtightness detection valve has a built-in waterproof and breathable membrane to balance air pressure and block water. LED indicator lights clearly display the status via a light guide column, and transparent sealant ensures the seal does not affect heat conduction. For efficient heat dissipation, the annular cooling channel combined with spiral guide vanes extends heat exchange time, and the inlet water channel filter prevents clogging and avoids overheating that could affect performance. The nano-ceramic coating on the metal inner sleeve enhances wear and corrosion resistance. These detailed design features collectively improve the battery's stability and lifespan in complex underwater environments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first overall structure of an underwater propulsion battery with pressure resistance and waterproof function according to the present invention;

[0019] Figure 2This is a schematic diagram of the second integral structure of an underwater propulsion battery with pressure resistance and waterproof function according to the present invention;

[0020] Figure 3 This is a partial side view of a pressure-resistant and waterproof underwater propulsion battery according to the present invention.

[0021] Figure 4 This is a partial perspective structural diagram of an underwater propulsion battery with pressure resistance and waterproof function according to this utility model.

[0022] Numbering on the map:

[0023] 1. Battery casing; 101. T-shaped support column; 102. Arc-shaped transition surface; 2. Battery module; 201. End cap; 202. Air tightness detection valve; 203. Bolt connection hole; 204. Stress relief groove; 205. Water inlet channel; 206. Water outlet channel; 207. Waterproof and breathable membrane; 208. Cooling channel; 209. Spiral guide vane; 3. Metal inner sleeve; 301. Stepped double composite sealing structure; 302. Annular stepped groove; 303. Main sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 As shown, this utility model provides an underwater propulsion battery with pressure resistance and waterproof function, including a rectangular battery housing 1 and a battery module 2 encapsulated in the housing. The battery housing 1 is composed of a cylindrical metal inner sleeve 3 and two end caps 201 sealed together. The end caps 201 are welded to the ends of the metal inner sleeve 3 by flanges. A stepped double composite sealing structure 301 is provided between the end face of the metal inner sleeve 3 and the flange.

[0026] The stepped double composite sealing structure 301 includes an annular stepped groove 302 formed on the end face of the metal inner sleeve 3, a main sealing ring 303 embedded in the annular stepped groove 302, and a cured sealing adhesive layer coated on the mating surface of the flange and the metal inner sleeve 3.

[0027] In terms of sealing and pressure resistance, the battery casing 1 adopts a combined structure of a cylindrical metal inner sleeve 3 and an end cap 201 welded together via a flange. The cylindrical metal inner sleeve 3 itself has excellent water pressure resistance and can evenly distribute underwater pressure. The sealing between the end cap 201 and the metal inner sleeve 3 is achieved through a stepped double composite sealing structure 301. The main sealing ring 303 in the annular stepped groove 302 can initially block water intrusion, and together with the cured sealant layer on the mating surface of the flange and the metal inner sleeve 3, a secondary seal is formed, providing double protection against water entering the casing. At the same time, the 8-12 bolt connection holes 203 evenly distributed around the flange ensure a tight connection between the end cap 201 and the inner sleeve, and the stress relief grooves 204 between adjacent holes reduce stress concentration during tightening, further improving sealing reliability.

[0028] At least three T-shaped support columns 101 are axially spaced along the outer wall of the metal inner sleeve 3. The bottom of each T-shaped support column 101 is welded to the inner wall of the metal inner sleeve 3, and the top of each T-shaped support column 101 abuts against the inner wall of the battery casing 1. Structurally, the bottom of the T-shaped support columns 101 on the outer wall of the metal inner sleeve 3 is welded to the inner wall of the inner sleeve, and the top abuts against the inner wall of the battery casing 1, forming a rigid support structure that can effectively resist casing deformation caused by underwater pressure and enhance the overall structural strength. The arc-shaped transition surface 102 at the top of the support column can distribute the force and avoid excessive local stress.

[0029] For status monitoring, the airtightness detection valve 202 at the center of the end cap 201 has a built-in waterproof and breathable membrane 207, which can prevent moisture from entering while balancing the air pressure inside and outside the shell. The airtightness of the shell can be easily detected through this valve. The LED indicator on the side of the valve is used to display the battery status (such as power, airtightness, etc.). The light is transmitted to the outer surface of the end cap 201 through the light guide column. The transparent sealant in the assembly gap between the light guide column and the end cap 201 ensures a watertight seal without affecting the light transmission.

[0030] In the heat dissipation system, the annular cooling channel 208 between the battery module 2 and the metal inner sleeve 3 is connected to the outside through the water inlet channel 205 and the water outlet channel 206 on the end cover 201. During operation, water flows into the channel through the water inlet channel 205. The filter screen filters impurities to prevent clogging. The spiral guide vanes 209 (with a spiral angle of less than 35°) inside the channel cause the water to flow in a spiral, increasing the contact time and area between the water and the channel wall, thus improving heat dissipation efficiency. Finally, the water flows out through the water outlet channel 206, carrying away the heat generated by the battery during operation.

[0031] In terms of protective performance, the 20-50μm nano-ceramic coating on the outer surface of the metal inner sleeve 3 has wear-resistant and corrosion-resistant properties, which can protect the inner sleeve from corrosion and wear in complex underwater environments and extend its service life.

[0032] Furthermore, an airtightness detection valve 202 is embedded in the center of the end cap 201. The airtightness detection valve 202 has a built-in waterproof and breathable membrane 207, and an LED indicator and a light guide are located on its side. The airtightness detection valve 202 can monitor the airtightness of the casing in real time, while the waterproof and breathable membrane 207 achieves air pressure balance and water resistance. The LED indicator clearly displays the battery status via the light guide, and the transparent sealant ensures a seal without affecting light transmission, allowing users to monitor the battery's operation underwater in real time.

[0033] Furthermore, the T-shaped support column 101 has an arc-shaped transition surface 102 at its top large-diameter end. The distribution design of the T-shaped support columns 101 enhances the overall deformation resistance of the shell, while the arc-shaped transition surface 102 at the top reduces stress concentration and avoids structural damage. The evenly distributed bolt connection holes 203 and stress relief grooves 204 on the flange ensure uniform stress distribution at the connection points, reduce the risk of deformation, and guarantee structural stability during long-term use.

[0034] The stepped double composite sealing structure 301 (main sealing ring 303 + cured sealing adhesive layer) forms a double waterproof barrier. Combined with the precision welding of the flange and the bolt fastening design, it significantly improves the waterproof sealing performance of the shell. The pressure-resistant structure of the cylindrical metal inner sleeve 3 and the rigid support of the T-shaped support column 101 enable the battery to withstand greater underwater pressure and adapt to underwater operating environments at different depths.

[0035] Furthermore, an annular cooling channel 208 is provided between the battery module 2 and the metal inner sleeve 3. The end cap 201 is provided with a water inlet channel 205 and a water outlet channel 206 that communicate with the cooling channel 208. A filter screen is embedded in the water inlet channel 205.

[0036] A spiral guide vane 209 is provided inside the cooling channel 208, and the spiral angle of the spiral guide vane 209 is less than 35°.

[0037] The annular cooling channel 208, in conjunction with the spiral guide vane 209 (small spiral angle design), extends the residence time of water in the channel, increases the heat exchange area, and improves heat dissipation efficiency. The filter screen of the water inlet channel 205 effectively prevents impurities from clogging the channel, ensuring the long-term stable operation of the cooling system and preventing the battery from being affected by overheating, thus avoiding impact on performance or lifespan.

[0038] Furthermore, the outer surface of the metal inner sleeve 3 is provided with a nano-ceramic coating, the thickness of which is 20-50μm.

[0039] The thickness of the nano-ceramic coating on the outer surface of the metal inner sleeve 3 is controlled at 20-50μm, which can effectively resist underwater corrosion and wear, protect the inner sleeve structure, and at the same time have certain insulation and heat insulation properties, providing a safe operating environment for the battery module 2.

[0040] Furthermore, the flange has 8-12 bolt holes 203 evenly distributed around its circumference, and stress relief grooves 204 are provided between adjacent bolt holes 203.

[0041] The LED indicator extends to the outer surface of the end cover 201 through a light guide post, and the assembly gap between the light guide post and the end cover 201 is filled with transparent sealant.

[0042] The transparent sealant between the light guide post and the end cap 201, and the stress relief groove 204 of the flange, further enhance the overall reliability of the battery from the perspectives of sealing and stress dispersion, ensuring stable operation in complex underwater environments.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An underwater propulsion battery with pressure and water resistance, comprising a rectangular battery casing and a battery module encapsulated within the casing, characterized in that: The battery casing is composed of a cylindrical metal inner sleeve and two end caps that are sealed together. The end caps are welded to the end of the metal inner sleeve via flanges. A stepped double composite sealing structure is provided between the end faces of the metal inner sleeve and the flanges. The stepped double composite sealing structure includes an annular stepped groove on the end face of the metal inner sleeve, a main sealing ring embedded in the annular stepped groove, and a cured sealant layer coated on the mating surface of the flange and the metal inner sleeve. The outer wall of the metal inner sleeve is provided with at least three T-shaped support columns spaced axially. The bottom of each T-shaped support column is welded and fixed to the inner wall of the metal inner sleeve, and the top of each T-shaped support column abuts against the inner wall of the battery casing.

2. The underwater propulsion battery with pressure resistance and waterproof function according to claim 1, characterized in that: An airtightness detection valve is embedded in the center of the end cap. The airtightness detection valve has a built-in waterproof and breathable membrane. An LED indicator and a light guide are provided on the side of the airtightness detection valve.

3. The underwater propulsion battery with pressure resistance and waterproof function according to claim 1, characterized in that: The T-shaped support column has an arc-shaped transition surface at its top large-diameter end.

4. The underwater propulsion battery with pressure resistance and waterproof function according to claim 1, characterized in that: An annular cooling channel is provided between the battery module and the metal inner sleeve. The end cover is provided with an inlet channel and an outlet channel that communicate with the cooling channel. A filter screen is embedded in the inlet channel.

5. The underwater propulsion battery with pressure resistance and waterproof function according to claim 4, characterized in that: The cooling channel is provided with a spiral guide vane, and the spiral angle of the spiral guide vane is less than 35°.

6. The underwater propulsion battery with pressure resistance and waterproof function according to claim 1, characterized in that: The outer surface of the metal inner sleeve is provided with a nano-ceramic coating, the thickness of which is 20-50 μm.

7. The underwater propulsion battery with pressure resistance and waterproof function according to claim 1, characterized in that: The flange has 8-12 bolt holes evenly distributed around its circumference, and stress relief grooves are provided between adjacent bolt holes.

8. The underwater propulsion battery with pressure resistance and waterproof function according to claim 2, characterized in that: The LED indicator extends to the outer surface of the end cap via a light guide post, and the assembly gap between the light guide post and the end cap is filled with transparent sealant.

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