Sealing device for magnesium / cuprous chloride seawater battery

Abstract

The invention discloses a sealing device for a magnesium / cuprous chloride seawater battery, which comprises a lower shell, an upper shell, a sealing assembly and an opening assembly, the upper shell and the lower shell are respectively provided with an inlet hole and an outlet hole, the upper shell and the lower shell form a cabin body for placing the magnesium / cuprous chloride seawater battery, and an outer cabin battery is placed outside the lower shell; the sealing assembly comprises a ball plug for sealing the access hole, a tension spring and a pull rope, the opening assembly comprises a battery lead and a heating wire, and the heating wire is in contact with the pull rope; the outer bin battery supplies power to the heating wire after entering water and being activated, the heating wire fuses the pull rope, the tension spring rebounds to open the ball plug to open the access hole, and external seawater enters the inner bin to activate the magnesium / cuprous chloride seawater battery.

Description

Technical Field

[0001] This invention belongs to the field of seawater battery application technology, specifically relating to a sealing device for magnesium / cuprous chloride seawater batteries. Background Technology

[0002] Seawater batteries are a type of reserve battery. These batteries do not have a liquid-dry storage state; they are activated by being immersed in water before use. Seawater batteries have advantages such as long storage life, safety and reliability, good low-temperature performance, and fast activation speed. They are widely used as power sources for underwater electric propulsion equipment, marine exploration equipment, marine emergency rescue equipment, detonation devices, and other equipment.

[0003] The positive electrode materials of seawater batteries mainly use halides and oxides of three metals: silver, copper, and lead. Among them, cuprous chloride, a copper halide, is a material with low electrochemical polarization and low price. The magnesium / cuprous chloride seawater battery composed of cuprous chloride and magnesium alloy has the characteristics of high specific power and high specific energy. Based on these advantages, this system of seawater batteries has the widest application.

[0004] Cuprous chloride has high chemical reactivity and is stable in dry environments, but it is easily degraded into basic cuprous chloride when exposed to humid and hot environments, causing electrode deformation and capacity loss. To ensure that magnesium / cuprous chloride seawater batteries can be stored for a long time, they must be stored in a sealed device, and the sealing cover / sealing valve of the sealing device should be opened before use.

[0005] The sealing cap / sealing valve of the magnesium / cuprous chloride seawater battery sealing device is mainly opened manually. With increasingly frequent human exploration and development of the ocean, air-dropped detection equipment, emergency rescue equipment, and position-indicating equipment have also developed rapidly. Magnesium / silver chloride, magnesium / cuprous iodide, and magnesium / lead chloride systems, due to the stable properties of their electrode materials, do not require sealing devices for storage and can be installed in an open state on air-dropped equipment, meeting the mobility requirements for immediate deployment. However, the cost-effective magnesium / cuprous chloride seawater battery system is limited by the manual opening method of the sealing device, making it difficult to adapt to the aforementioned scenarios. Therefore, designing a simple sealing device with a self-opening function has become an urgent technical problem to be solved for magnesium / cuprous chloride seawater batteries. Summary of the Invention

[0006] To address the technical problems mentioned above, this invention provides a quick-opening sealing device for magnesium / cuprous chloride seawater batteries. This device not only meets the requirement for sealed storage of magnesium / cuprous chloride seawater batteries but also has a self-opening function, making it suitable for highly mobile sea-dropped detection equipment, emergency rescue equipment, and positioning equipment.

[0007] The technical solution adopted by this invention patent to solve its technical problem is: a sealing device for a magnesium / cuprous chloride seawater battery, including a lower shell and an upper shell disposed on the lower shell, and further including sealing components disposed in the upper shell and the lower shell respectively, and an opening component disposed between the upper shell and the lower shell. The upper shell sidewall and the lower shell bottom are respectively provided with inlet and outlet holes. The lower shell and the upper shell are connected by a female stop and a male stop to form a sealable chamber for placing the magnesium / cuprous chloride seawater battery. The inner wall of the lower shell is provided with an inner chamber for placing the magnesium / cuprous chloride seawater battery, and the outer wall of the lower shell is provided with an outer chamber for placing the outer chamber battery. The bottom of the inner chamber is provided with a bottom flow channel for seawater inflow, and the bottom flow channel is directly connected to the inlet and outlet holes. The two battery wires of the outer chamber battery pass through the control chamber wall respectively. Two through holes lead into the control chamber; the sealing assembly includes a ball plug for sealing the inlet and outlet holes and a tension spring connecting the ball plug, with a pull rope connected to the tension spring; the opening assembly includes a heating wire connected to the outer chamber battery via battery wires, with two battery wires from the outer chamber battery passing through the two through holes on the control chamber wall to enter the control chamber, and the two battery wires being connected to both ends of the heating wire, placed on a fixed post, and finally tightened with bolts, bringing the heating wire into contact with the pull rope; after the magnesium / cuprous chloride seawater battery is placed into seawater using the sealing device, the outer chamber battery is activated. After the outer chamber battery is activated by entering the water, it supplies power to the heating wire on the rope-breaking platform, causing the heating wire to heat up and melt the pull rope wrapped around it. After the pull rope melts, the tension applied to the ball plug disappears, the tension spring rebounds quickly, pulling open the ball plug, opening the inlet and outlet holes, and allowing external seawater to enter the inner chamber to activate the magnesium / cuprous chloride seawater battery.

[0008] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery has a female stop and a male stop at the upper and lower ends of its upper housing, respectively. A female stop is correspondingly provided at the top opening of the lower housing, and a male stop is correspondingly provided at the bottom end of the top cover. The female stop of the lower housing and the male stop on the top cover of the control compartment of the upper housing are connected to form a sealable compartment. The mating surfaces of the female and male stops are bonded together using adhesive.

[0009] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery features flared inlet / outlet holes in both the lower and upper housings, with the inner diameter at the maximum point of the flare being the same as the outer diameter of the ball plug. When sealing the inlet / outlet holes, the flared shape allows for a larger contact surface with the ball plug, improving sealing reliability.

[0010] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery has a ball plug connected to a locking tube via a pull rope. The pull rope is used to fix the ball plug, the locking tube is used to fix the pull rope, a tension spring is used to open the ball plug sealing inlet and outlet hole, and the locking tube clamps and fixes the pull rope.

[0011] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery has a control chamber inside its upper housing, and a rope-breaking platform inside the control chamber, with the heating wire placed on the rope-breaking platform.

[0012] The sealing device for a magnesium / cuprous chloride seawater battery includes a broken rope column comprising a hollow cylinder and a broken rope platform, wherein the broken rope platform with a groove is installed inside the hollow cylinder.

[0013] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery has an inner chamber located on the inner wall of the lower shell. Two protrusions at the bottom of the lower shell's inner wall form a bottom flow channel, which is directly connected to the inlet / outlet holes on the lower shell wall. The upper shell is provided with a top flow channel, which is directly connected to the inlet / outlet holes on the upper shell wall.

[0014] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery has an outer chamber located on the outer wall of the lower housing. A fixing post is provided on the outer wall of the lower housing to fix the tension spring on the sealing assembly. Circular hollow conductor posts and rectangular hollow conductor posts are provided inside the outer wall of the lower housing. The bottom of the circular and rectangular hollow conductor posts has through holes penetrating the inner wall of the lower housing. After the battery conductors of the magnesium / cuprous chloride seawater battery in the inner chamber are led out to the outside through the through holes, the hollow parts of the circular and rectangular hollow conductor posts are sealed with adhesive.

[0015] The aforementioned sealing device for a magnesium / cuprous chloride seawater battery uses a chemically stable seawater battery system that can be stored openly in a natural environment for a long time. It is one of the following systems: magnesium / silver chloride, magnesium / cuprous iodide, and magnesium / lead chloride.

[0016] The sealing device for a magnesium / cuprous chloride seawater battery is provided with a pull rope made of nylon or polyethylene; the heating wire is made of an iron-chromium-aluminum alloy, a nickel-chromium alloy, a copper-nickel alloy, or a copper-manganese alloy; and the rope breakage platform is required to meet the requirements of high strength and low thermal conductivity, and its material is made of polyetheretherketone, zirconium oxide ceramic, calcium silicate ceramic, polymethyl methacrylate, polyimide, polyetherketoneketone, polyphenylene sulfide, polyoxymethylene, or glass fiber reinforced nylon.

[0017] Compared with the prior art, the present invention has the following advantages: the inlet and outlet holes are sealed by fixing the ball plug with a rope, the timing of the heating wire melting the rope is controlled by the outer battery, and the sealing effect of the ball plug on the opening is released by the external tension spring. The sealing device has a simple and reliable structure and does not require manual opening. It not only meets the sealed storage requirements of magnesium / cuprous chloride seawater batteries, but also enables magnesium / cuprous chloride seawater batteries to be adapted to highly mobile sea-dropped detection equipment, emergency rescue equipment and positioning equipment. Attached Figure Description

[0018] Figure 1 This is an exploded view of the overall structure of one embodiment of the present invention;

[0019] Figure 2 This is a top view schematic diagram of an embodiment of the present invention;

[0020] Figure 3 This is a perspective view of the lower housing according to an embodiment of the present invention;

[0021] Figure 4 This is a perspective view of the upper housing according to an embodiment of the present invention;

[0022] Figure 5 yes Figure 2 Schematic perspective view of section AA in the middle;

[0023] Figure 6 yes Figure 2 Schematic perspective view of section BB in the middle;

[0024] Figure 7 yes Figure 5 Schematic sectional view of the CC section;

[0025] Figure 8 This is a three-dimensional perspective view of a rope-breaking platform on a rope-breaking pillar according to an embodiment of the present invention.

[0026] The reference numerals in the attached drawings are as follows: 100—lower shell, 101—female stop, 102—inlet / outlet hole, 110—inner wall of lower shell, 111—inner compartment, 1111—boss, 112—boss with through hole, 113—bottom flow channel, 120—outer wall of lower shell, 121—circular hollow guide post, 122—rectangular hollow guide post, 123—outer compartment, 200—upper shell, 201—male stop, 202—top flow channel, 203—through hole, 210—control compartment, 211—filling compartment. Glue tray, 212—fixed post, 2121—bolt, 2122—washer, 2123—head bolt with hole, 213—rope break post, 214—top cover, 2131—hollow cylinder, 2132—rope break platform, 300—sealing assembly, 301—tension spring, 302—ball plug, 303—pull rope, 304—locking tube, 400—opening assembly, 401—heating wire, 410—outer battery compartment, 411—battery wire, 500—magnesium / cuprous chloride seawater battery. Detailed Implementation

[0027] To make the objectives and technical solutions of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] In the following, embodiments of the invention will be described in detail with reference to the accompanying drawings. Before describing the embodiments of the invention, some terms or expressions used in this specification and claims should not be construed as limited to what is commonly understood or defined in a commonly used dictionary, but should be understood according to the meaning and concept corresponding to the invention, based on the principles that the inventors of this application can appropriately define the terms or expressions to best interpret the invention.

[0029] Because the embodiments of the present invention are provided to explain the invention more fully to those skilled in the art, the shapes, dimensions, etc. of the components shown in the accompanying drawings may be enlarged, omitted, or illustrated schematically for clarity. Therefore, the dimensions or proportions of the components should not be construed as fully reflecting their actual dimensions or proportions.

[0030] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, a sealing device for a magnesium / cuprous chloride seawater battery is provided, including a lower housing 100, an upper housing 200, a sealing assembly 300, and an opening assembly 400.

[0031] The magnesium / cuprous chloride seawater battery 500 is placed inside the lower housing 100. The lower housing 100 and the upper housing 200 are connected by a female stop 101 and a male stop 201. The inlet and outlet holes 102 are located at the bottom of the lower housing 100 and on the side of the upper housing 200. The control compartment 210 is located on the side inside the upper housing 200. The control compartment 210 and the top cover 214 are connected by a female stop 101 and a male stop 201. In some embodiments, the positions can be arranged according to the overall size and actual needs. The inlet and outlet holes 102 can be located on the same side or different sides of the same wall of the outer casing, or on different walls of the device casing.

[0032] The tension spring 301 and ball plug 302 in the sealing assembly 300 are disposed on the outer wall surface where the inlet / outlet hole 102 is located. The hook of the tension spring 301 is fixed to the fixing post 212 by bolts 2121. In some embodiments, one hook of the tension spring 301 can be directly hooked to the fixing post 212, or a connecting piece can be provided between the tension spring 301 and the fixing post 212, and then the connecting piece is fixed.

[0033] When the sealing assembly 300 seals the inlet and outlet hole 102 of the upper housing 200, it first fixes the tension spring 301 to the fixing post 212 with bolts 2121, then passes the pull rope 303 through the hole of the head bolt 2123 provided in the top flow channel 202, and finally passes the pull rope 303 through the through hole 203 on the side wall of the control chamber 210 and enters the control chamber 210.

[0034] When the sealing assembly 300 seals the inlet and outlet hole 102 of the lower housing 100, it first fixes the tension spring 301 to the fixing post 212 with bolts 2121, then passes the pull rope through the hole of the head bolt 2123 provided in the bottom flow channel, then passes the pull rope 303 through the channel of the through hole boss 112, and finally passes the pull rope 303 through the through hole 203 at the bottom of the control chamber 210 and enters the control chamber 210.

[0035] The outer battery 410 in the opening assembly 400 is placed in an outer compartment 123 provided on the outer wall 120 of the lower housing. In some embodiments, the outer compartment 123 is provided on other outer wall surfaces of the outer wall 120 of the lower housing.

[0036] The ball plug 302 is connected to the locking tube 304 via a pull rope 303. The pull rope 303 is used to fix the ball plug 302, and the locking tube 304 is used to fix the pull rope 303. The tension spring 301 is used to open the ball plug 302 to seal the inlet / outlet hole 102. The locking tube 304 clamps and fixes the pull rope 303. After the pull rope 303 enters the control chamber 210 and comes into contact with the heating wire 401, tightening the pull rope 303 causes the ball plug 302 to block the inlet / outlet hole 102. The tension spring 301 is in an extended state. At the same time, the pull rope 303 and the heating wire 401 are in close contact with the inner wall of the groove of the rope breaking platform 2132. The locking tube 304 fixes the pull rope 303 to the fixing post 212 inside the control chamber 210.

[0037] After the magnesium / cuprous chloride seawater battery 500 is placed in seawater using the sealing device of this invention, the outer chamber battery 410 is activated. After the outer chamber battery 410 is activated in the water, it supplies power to the heating wire 401 on the rope breaking platform 2132. The heating wire 401 heats up and melts the pull rope 303 wrapped around the heating wire 401. After the pull rope 303 melts, the tension applied to the ball plug 302 disappears, the tension spring 301 quickly rebounds, pulls open the ball plug 302, opens the inlet and outlet hole 102, and the external seawater enters the inner chamber 111 to activate the magnesium / cuprous chloride seawater battery 500.

[0038] In one embodiment of the present invention, such as Figure 1 , Figure 3 and Figure 5 As shown, the two protrusions 1111 on the side wall of the inner wall 110 of the lower housing and their respective side wall surfaces, together with the inner wall of the housing where the rectangular hollow conductor post 122 is located, form the inner chamber 111. The magnesium / cuprous chloride seawater battery 500 is placed in the inner chamber 111. All types of seawater batteries need to communicate with the external water environment through a flow channel during liquid filling and discharge. The two protrusions 1111 at the bottom of the inner wall 110 of the lower housing form the bottom flow channel 113, which communicates with the inlet / outlet hole 102 on the housing wall of the lower housing 100. Figure 2 , Figure 5 and Figure 6As shown, a fixing post 212 is provided on the bottom flow channel 113. The fixing post 212 is used to install the head bolt with hole 2123. The inner wall 110 of the lower housing is provided with a boss 112 with through hole. The fixing post 212 and the boss with through hole 112 are used for directional positioning of the pull rope 303. In some embodiments, the fixing post 212 and the head bolt with hole 2123 are directly injection molded into a single fixing post with hole.

[0039] In one embodiment of the present invention, such as Figure 1 , Figure 2 and Figure 3 As shown, a circular hollow conductor post 121 and a rectangular hollow conductor post 122 are provided on the outer wall 120 of the lower housing. The battery conductors 411 of the magnesium / cuprous chloride seawater battery 500 placed in the inner compartment 111 are led out through the through holes 203 at the bottom of the circular hollow conductor post 121 and the rectangular hollow conductor post 122. After the battery conductors 411 are led out, the hollow conductor posts are sealed with adhesive. In some embodiments, the hollow conductor posts can be set as hollow square posts, hollow polygonal posts, hollow elliptical posts, or other hollow irregular posts.

[0040] In one embodiment of the present invention, such as Figure 4 As shown, the upper housing 200 includes a control compartment 210, a top flow channel 202, and an inlet / outlet port 102. Figure 3 and Figure 6 As shown, the top flow channel 202 is connected to the inlet / outlet hole 102 on the shell wall of the upper housing 200. A fixing post 212 is provided on the top flow channel 202. The fixing post 212 is used to install the head bolt with hole 2123 and is used for directional limiting of the pull rope 303. In some embodiments, the fixing post 212 and the head bolt with hole 2123 are directly injection molded into a single fixing post with hole.

[0041] In one embodiment of the present invention, the installation process of the sealing assembly 300 used in the inlet / outlet hole 102 of the lower housing 100 is as follows: first, the tension spring 301 is fixed to the inlet / outlet hole 102 using bolts 2121. Figure 1 As shown, the fixing post 212 is located on the outer wall 120 of the lower housing, and then as... Figure 5 and Figure 6 As shown, the pull rope 303 is passed through the hole of the bolt 2123 with a hole on the head of the bottom flow channel 113, then the pull rope 303 is passed through the hole of the boss 112 with a through hole, and finally the pull rope 303 is... Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, it enters the control chamber 210 after passing through the through hole 203 at the bottom of the control chamber 210.

[0042] In one embodiment of the present invention, the installation process of the sealing assembly 300 used in the inlet / outlet hole 102 of the upper housing 200 is as follows: first, the tension spring 301 is fixed to the inlet / outlet hole 102 using bolts 2121. Figure 1 As shown, the fixing post 212 is located on the outer wall 120 of the lower housing, and then as... Figure 5 and Figure 6 As shown, the pull rope 303 is passed through the hole of the head bolt 2123 on the top flow channel 202, and finally the pull rope 303 is... Figure 4 , Figure 6 and Figure 7 As shown, it enters the control chamber 210 after passing through the through hole 203 on the side wall of the control chamber 210.

[0043] After the female stop 101 of the lower housing 100 and the male stop 201 of the upper housing 200 are bonded together with adhesive, the installation operation inside the control compartment 210 is carried out.

[0044] In one embodiment of the present invention, such as Figure 4 and Figure 7 As shown, the control compartment 210 has an internal potting groove 211 formed by a boss 1111. The two battery wires 411 of the outer battery 410 pass through two through holes 203 on the wall of the control compartment 210 into the potting groove 211, and then through the two through holes 203 on the boss 1111 before being placed at both ends of the heating wire 401 in the opening assembly 400. The control compartment 210 also has an internal broken rope post 213, which includes a hollow cylinder 2131 with a positioning groove and... Figure 8 When installing the rope breaking platform 2132 shown, first vertically insert the rope breaking platform 2132 into the positioning groove of the hollow cylinder 2131, then place the heating wire 401 on the rope breaking platform 2132, and initially fix both ends of the heating wire 401 with bolts 2121 and washers 2122 respectively.

[0045] In one embodiment of the present invention, a pull rope 303, which passes through the through hole 203 at the bottom of the control chamber 210, is wrapped around the heating wire 401 and passes through the groove of the rope breaking platform 2132. The pull rope 303 is then passed through the hole of the head bolt 2123 on the fixing post 212 and the through hole of the locking tube 304 in sequence. The ball plug 302 is then pulled to the inlet / outlet hole 102 of the lower housing 100. The pull rope 303 is then tightened until the ball plug 302 is stuck in the inlet / outlet hole 102. At the same time, the pull rope 303 and the heating wire 401 are pressed tightly against the inner wall of the groove of the rope breaking platform 2132. The locking tube 304 is moved to a position that is pressed tightly against the head bolt 2123. A clamp is used to clamp the locking tube 304 and the pull rope 303 together.

[0046] In one embodiment of the present invention, a pull rope 303, which passes through the through hole 203 on the side wall of the control compartment 210, is wrapped around the heating wire 401 and passes through the groove of the rope breaking platform 2132. The pull rope 303 is then passed through the hole of the bolt with a hole 2123 on the head of the fixing column 212 and the through hole of the locking tube 304 in sequence. The ball plug 302 is then pulled to the inlet / outlet hole 102 of the lower housing 100. The pull rope 303 is then tightened until the ball plug 302 is stuck in the inlet / outlet hole 102. At the same time, the pull rope 303 and the heating wire 401 are pressed tightly against the inner wall of the groove of the rope breaking platform 2132. The locking tube 304 is moved to a position that is pressed tightly against the bolt with a hole 2123 on the head, and a clamp is used to clamp the locking tube 304 and the pull rope 303 together.

[0047] In some embodiments, two pull ropes 303 can be simultaneously wrapped around the heating wire 401.

[0048] In one embodiment of the present invention, after the locking tube 304 and the pull rope 303 are clamped and fixed, the two ends of the heating wire 401 are respectively connected to the two battery wires 411 and placed on the fixing post 212. The bolts 2121 are tightened so that the heating wire 401 and the battery wires 411 are in close contact.

[0049] The rope breaking platform 2132 needs to meet the requirements of high strength and low thermal conductivity. In some embodiments, the rope breaking platform 2132 is made of a material with high hardness and low thermal conductivity, including one of zirconium oxide ceramic, calcium silicate ceramic, polymethyl methacrylate, polyimide, polyetheretherketone, polyetherketoneketone, polyphenylene sulfide, polyoxymethylene, and glass fiber reinforced nylon. In some embodiments, when the upper shell 200 is processed using the aforementioned material, the rope breaking column 213 can be directly processed into shape without disassembling it into a hollow cylinder 2131 and a rope breaking platform 2132.

[0050] In some embodiments, the pull cord 303 contacts the heating wire 401 through winding contact, and the number of turns of the pull cord 303 on the heating wire 401 is not limited to 0.5 turns, 1.5 turns, or 2 turns.

[0051] The locking tube 304 is used to fix the pull rope 303. In some embodiments, the pull rope 303 is passed through the locking tube 304 and the hole of the head-hole bolt 2123 on the fixing post 212 in sequence, and then passed through the locking tube 304 again. The pull rope 303 is then tightened, and the locking tube 304 is moved to a position close to the head-hole bolt 2123. A clamp is used to clamp the locking tube 304 and the pull rope 303 together, so that the tail of the pull rope 303 forms a fixing loop. In some embodiments, the head-hole bolt 2123 can be replaced with a bolt with holes. In some embodiments, the head-hole bolt 2123 can be replaced. The pull rope 303 is passed sequentially through the locking tube 304, around the screw of the bolt, and then through the locking tube 304 again. The pull rope 303 is then tightened, and the locking tube 304 is moved to a position close to the screw of the bolt. A clamp is used to secure the locking tube 304 and the pull rope 303 together, so that the tail of the pull rope 303 forms a fixing loop. In some embodiments, the fixing post 212 and the head-hole bolt 2123 are directly injection molded as a single fixing post.

[0052] After the internal components of the control compartment 210 are installed, the mating surfaces of the female stop 101 of the control compartment 210 and the male stop 201 of the top cover 214 are bonded together with adhesive.

[0053] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The description of the embodiments above is only for the purpose of helping to understand the method and core ideas of this application. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A sealing device for a magnesium / cuprous chloride seawater battery, characterized in that: The device includes a lower housing (100) and an upper housing (200) disposed on the lower housing (100). It also includes a sealing assembly (300) disposed in the upper housing (200) and the lower housing (100) respectively, and an opening assembly (400) disposed between the upper housing (200) and the lower housing (100). The upper housing (200) and the lower housing (100) are respectively provided with inlet and outlet holes (102). The lower housing (100) and the upper housing (200) are connected to form a chamber for a sealed magnesium / cuprous chloride seawater battery (500). The lower housing (100) has an inner chamber (111) for placing the magnesium / cuprous chloride seawater battery (500). The lower housing (100) has an outer chamber (123) for placing the outer chamber battery (410) outside the lower housing (100). The inner chamber (111) is provided with a bottom flow channel (11) for seawater to flow in. 3) The bottom flow channel (113) is connected to the inlet and outlet hole (102); the sealing assembly (300) includes a ball plug (302) for sealing the inlet and outlet hole (102) and a tension spring (301) for connecting the ball plug (302), and a pull rope (303) is connected to the tension spring (301); the opening assembly (400) includes a heating wire (401) connected to the outer chamber battery (410) through a battery wire (411), and the heating wire (401) is in contact with the pull rope (303); after the outer chamber battery (410) is activated by entering water, it supplies power to the heating wire (401), the heating wire (401) melts the pull rope (303), the tension spring (301) rebounds and pulls open the ball plug (302) to open the inlet and outlet hole (102), and the external seawater enters the inner chamber (111) to activate the magnesium / cuprous chloride seawater battery (500).

2. The sealing device for a magnesium / cuprous chloride seawater battery according to claim 1, characterized in that, The upper shell (200) is provided with a female stop (101) and a male stop (201) at its upper and lower ends, respectively. The lower shell (100) is provided with a female stop (101) at its top opening, and the top cover (214) is provided with a male stop (201) at its bottom end.

3. The sealing device for a magnesium / cuprous chloride seawater battery according to claim 1, characterized in that, The inlet / outlet hole (102) is trumpet-shaped, and its maximum inner diameter is the same as the outer diameter of the ball plug (302).

4. The sealing device for a magnesium / cuprous chloride seawater battery according to claim 1, characterized in that, The ball plug (302) is connected to the locking tube (304) via a pull rope (303).

5. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 1, 2, 3, or 4, characterized in that, The upper housing (200) is provided with a control compartment (210), and the control compartment (210) is provided with a rope breaking platform (2132). The heating wire (401) is placed on the rope breaking platform (2132).

6. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 5, characterized in that, The rope-breaking column (213) includes a hollow cylinder (2131) and a rope-breaking platform (2132), with the rope-breaking platform (2132) having a groove installed inside the hollow cylinder (2131).

7. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 6, characterized in that, The inner compartment (111) is located on the inner wall (110) of the lower shell. The bottom of the inner wall (110) of the lower shell is provided with a bottom flow channel (113) consisting of two protrusions (1111), and the bottom flow channel (113) is connected to the inlet and outlet hole (102).

8. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 7, characterized in that, The outer compartment (123) is located on the outer wall (120) of the lower shell. A fixing post (212) for fixing the tension spring (301) is provided on the outer wall (120) of the lower shell. A circular hollow guide post (121) and a rectangular hollow guide post (122) are provided inside the outer wall (120) of the lower shell. The bottom of the circular hollow guide post (121) and the rectangular hollow guide post (122) has a through hole (203) that penetrates the inner wall (110) of the lower shell.

9. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 8, characterized in that, The outer battery (410) is one of the following: magnesium / silver chloride system, magnesium / cuprous iodide system, and magnesium / lead chloride system.

10. A sealing device for a magnesium / cuprous chloride seawater battery according to claim 9, characterized in that, The material of the pull rope (303) is one of nylon and polyethylene; the material of the heating wire (401) is one of iron-chromium-aluminum alloy, nickel-chromium alloy, copper-nickel alloy, and copper-manganese alloy; the material of the rope breaking platform (2132) is one of polyetheretherketone, zirconium oxide ceramic, calcium silicate ceramic, polymethyl methacrylate, polyimide, polyetherketoneketone, polyphenylene sulfide, polyoxymethylene, and glass fiber reinforced nylon.

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