CN218731162U - High leakproofness sodium battery - Google Patents

Abstract

The utility model relates to a sodium battery technical field, and a high leakproofness sodium battery is disclosed, which comprises an outer shell, inside positive pole stick and the negative pole stick of setting up of shell, the top of shell sets up outer apron, the top surface fixed connection cylinder arch of outer apron, set up the exhaust hole on the bellied axial plane of cylinder, set up electrolyte in the shell, fixed connection blend stop on the inner wall of shell, the top surface of blend stop sets up interior apron, the sealed pad of top surface fixed connection of interior apron, the bottom surface fixed connection aiutage of interior apron, set up the piston on the inner wall of aiutage, the top surface fixed connection spring of piston. The utility model discloses if the unexpected oxidation of electrolyte produces gaseous back, gaseous oppression piston makes its upward movement, and the piston then drives the spring compression, so when the piston is in the top of aiutage, gaseous will be followed and discharged in the exhaust hole, so then avoided gaseous shell bulging deformation that leads to, prevent that the shell from suffering damage the battery leakproofness after the inflation, and strengthened the security.

Description

High leakproofness sodium battery

Technical Field

The utility model relates to a sodium battery technical field specifically is a high leakproofness sodium battery.

Background

The sodium ion battery is called sodium battery for short, is a secondary battery (rechargeable battery), mainly depends on the movement of sodium ions between a positive electrode and a negative electrode to work, and is similar to the working principle of a lithium ion battery. The electrode material used by the sodium ion battery is mainly sodium salt, and compared with lithium salt, the electrode material is richer in reserve and lower in price. Sodium ion batteries are a cost-effective alternative when the requirements on weight and energy density are not high, since sodium ions are larger than lithium ions.

According to the search, chinese patent documents, publication numbers: CN215911478U discloses a high leakproofness sodium battery, through when taking place expend with heat and contract with cold at the inside electrode liquid of inner tube, the inner tube lower extreme alright with can extrude or stretch the spring, the spring alright with better buffering to the inner tube lower extreme, the deformation of inner tube upper end can be cushioned through the buffer ring to further avoided the inner tube to take place serious deformation and influence sodium battery's leakproofness. However, because the electrode liquid is arranged in the inner cylinder, the electrode liquid can generate gas when expanding and directly act on the inner cylinder, so that the inner cylinder generates deformation and even expansion crack, and the real sealing effect can not be achieved. In view of the above, we propose a high-sealability sodium battery for solving the above problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a high leakproofness sodium battery, the leakproofness that possesses the battery is good to can in time discharge gas when the inside electrolyte of battery takes place the inflation, prevent the battery inflation and lead to damaging the advantage of leakproofness, solved above-mentioned technical problem.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a high leakproofness sodium battery, includes the shell, inside positive pole stick and the negative pole stick of setting up of shell, the top of shell sets up outer apron, the top surface fixed connection cylinder arch of outer apron, set up the exhaust hole on the bellied axial plane of cylinder, set up electrolyte in the shell, fixed connection blend stop on the inner wall of shell, the top surface of blend stop sets up interior apron, the top surface fixed connection of interior apron is sealed fills up, the bottom surface fixed connection aiutage of interior apron, set up the piston on the inner wall of aiutage, the top surface fixed connection spring of piston.

Preferably, the top of the shell is provided with a turned edge, and the top surface of the outer cover plate is fixedly connected with the positive electrode cap and the negative electrode cap.

Through the technical scheme, the outer cover plate forms the positive electrode cap, the negative electrode cap and the cylindrical protrusion in a stamping mode, the sealing performance is good due to the structural integrated forming, the top of the shell forms the turned edge through stamping, and the turned edge presses the periphery of the outer cover plate to form a sealed cavity between the outer cover plate and the shell.

Preferably, an inner cover plate and a sealing gasket are connected between the outer cover plate and the barrier strip, and the sealing gasket is a polytetrafluoroethylene gasket.

Through above-mentioned technical scheme, the turn-up cooperation blend stop of shell is in the same place interior apron, sealed pad and the inseparable pressfitting of outer apron, and sealed pad is used for strengthening the leakproofness, and sealed pad adopts polytetrafluoroethylene's material to have good corrosion resistance simultaneously, so makes the electrolyte sealed in the inside of shell, and the overall structure leakproofness is good.

Preferably, the outer surface of the housing is fixedly connected with a plurality of radiating fins.

Through above-mentioned technical scheme, because sodium battery can produce certain heat at the in-process that charges and discharge, the shell adopts aluminium system material self to have the fast performance of heat dissipation, and the cooperation a plurality of radiating fin can distribute away the heat fast, so improved sodium battery's heat dispersion.

Preferably, the exhaust funnel is fixedly connected to the inner wall of the cylindrical protrusion, and a spring is arranged inside the exhaust funnel.

Through the technical scheme, the positive electrode material and the negative electrode material are respectively arranged outside the electrolyte, the isolating film is arranged between the positive electrode material and the negative electrode material, the positive electrode material and the negative electrode material are crossed to enable the positive electrode and the negative electrode to be in short circuit once the isolating film is abraded unexpectedly, meanwhile, the electrolyte can generate gas once electrolytic oxidation is carried out, the gas can oppress the piston to enable the piston to move upwards, the piston drives the spring to compress, so when the piston is positioned at the uppermost end of the exhaust funnel, the gas can be discharged from the exhaust hole, so that the expansion deformation of the shell caused by the gas is avoided, and the safety is enhanced.

Compared with the prior art, the utility model provides a high leakproofness sodium battery possesses following beneficial effect:

1. the utility model discloses a punching press forms positive electrode cap, negative electrode cap and cylinder arch on the outer apron to thereby the pressfitting outer apron, sealed pad and inner cup board form sealed cavity with the inside of shell between the turn-up of shell and blend stop, overall structure makes sodium battery's sealing performance good.

2. The utility model discloses a be provided with the aiutage in the cylinder arch, if the unexpected oxidation of electrolyte produces gaseous after, gaseous oppression piston makes its upward movement, and the piston then drives the spring compression, so when the piston is in the top of aiutage, gaseous will be followed and discharged in the exhaust hole, so then avoided gaseous shell expansion deformation that leads to, prevent that the shell from suffering damage the battery leakproofness after the inflation, and strengthened the security.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a partially enlarged schematic view of A in FIG. 1;

FIG. 3 is a schematic front sectional view of the structure of the present invention;

fig. 4 is a partially enlarged schematic view of B in fig. 3 according to the present invention;

fig. 5 is a partially enlarged schematic view of C in the structure diagram 3 of the present invention.

Wherein: 1. a housing; 101. a heat dissipating fin; 2. an outer cover plate; 21. a positive electrode cap; 22. a negative electrode cap; 3. a cylindrical bulge; 4. an exhaust hole; 5. a positive electrode bar; 6. a negative electrode bar; 7. an electrolyte; 8. blocking strips; 9. an inner cover plate; 10. a gasket; 11. an exhaust funnel; 12. a piston; 13. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a high-sealing sodium battery comprises a housing 1, a positive electrode rod 5 and a negative electrode rod 6 are arranged inside the housing 1, an outer cover plate 2 is arranged at the top of the housing 1, a cylindrical protrusion 3 is fixedly connected to the top surface of the outer cover plate 2, an exhaust hole 4 is formed in the axial surface of the cylindrical protrusion 3, electrolyte 7 is arranged in the housing 1, a barrier strip 8 is fixedly connected to the inner wall of the housing 1, an inner cover plate 9 is arranged on the top surface of the barrier strip 8, a sealing gasket 10 is fixedly connected to the top surface of the inner cover plate 9, an exhaust cylinder 11 is fixedly connected to the bottom surface of the inner cover plate 9, a piston 12 is arranged on the inner wall of the exhaust cylinder 11, and a spring 13 is fixedly connected to the top surface of the piston 12.

Specifically, the top of the housing 1 is provided with a curled edge, and the top surface of the outer cover plate 2 is fixedly connected with the positive electrode cap 21 and the negative electrode cap 22. The advantage is, outer apron 2 forms positive electrode cap 21 and negative electrode cap 22 and cylindrical protrusion 3 through the mode of punching press, and structural integrated into one piece makes the leakproofness good, and the shell 1 top is the turn-up through the punching press formation again for thereby the turn-up oppresses outer apron 2 and makes and form a sealed cavity between outer apron 2 and the shell 1 all around.

Specifically, an inner cover plate 9 and a sealing gasket 10 are connected between the outer cover plate 2 and the barrier strip 8, and the sealing gasket 10 is a polytetrafluoroethylene gasket. The advantage is, the turn-up cooperation blend stop 8 of shell 1 is in the same place interior apron 9, sealed 10 and the inseparable pressfitting of outer apron 2, and sealed 10 of filling up is used for strengthening the leakproofness, and sealed 10 of filling up simultaneously adopts polytetrafluoroethylene's material to have good corrosion resistance, so makes electrolyte 7 sealed in the inside of shell 1, and overall structure leakproofness is good.

Specifically, a plurality of heat dissipating fins 101 are fixedly connected to the outer surface of the housing 1. The advantage is, because sodium battery can produce certain heat at the in-process of charging and discharging, shell 1 adopts aluminium system material to have fast performance of heat dissipation on its own, and the cooperation is a plurality of radiating fin 101 can distribute away the heat fast, so improved sodium battery's heat dispersion.

Specifically, the exhaust funnel 11 is fixedly connected to the inner wall of the cylindrical protrusion 3, and the spring 13 is arranged inside the exhaust funnel 11. The advantage is, be provided with anodal material and negative pole material respectively in the outside of electrolyte 7, be provided with the barrier film between the positive negative pole material, in case the unexpected wearing and tearing of barrier film will make anodal material and negative pole material intersect and make positive negative pole short circuit, in case electrolyte 7 in case electrolytic oxidation these all can cause gas production simultaneously, gas can oppress piston 12 and make its upward movement, piston 12 then drives spring 13 compression, so when piston 12 is in the top of aiutage 11, gas will be followed exhaust hole 4 and discharged, so then avoided gas to lead to shell 1 bulging deformation, the security has been strengthened.

When the sodium battery sealing device is used, after the electrolyte 7 is oxidized unexpectedly to generate gas, the gas presses the piston 12 to move upwards, the piston 12 drives the spring 13 to deform in a compression mode, when the piston 12 is located at the uppermost end of the exhaust cylinder 11, the gas can be discharged from the exhaust hole 4, and therefore expansion and deformation of the shell 1 caused by the gas are avoided, the outer cover plate 2 is pressed between the blocking strip 8 and the turned edge of the shell 1, the sealing gasket 10 and the inner cover plate 9 enable the inside of the shell 1 to form a sealed cavity, and the sodium battery sealing performance is good due to the integral structure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a high leakproofness sodium battery, includes shell (1), shell (1) is inside to set up positive pole stick (5) and negative pole stick (6), its characterized in that: the top of shell (1) sets up outer apron (2), the protruding (3) of top surface fixed connection cylinder of outer apron (2), set up exhaust hole (4) on the axial plane of the protruding (3) of cylinder, set up electrolyte (7) in shell (1), fixed connection blend stop (8) on the inner wall of shell (1), the top surface of blend stop (8) sets up interior apron (9), the sealed pad (10) of top surface fixed connection of interior apron (9), bottom surface fixed connection aiutage (11) of interior apron (9), set up piston (12) on the inner wall of aiutage (11), the top surface fixed connection spring (13) of piston (12).

2. A high-sealability sodium battery according to claim 1, wherein: the top of the shell (1) is provided with a turned edge, and the top surface of the outer cover plate (2) is fixedly connected with a positive electrode cap (21) and a negative electrode cap (22).

3. A high-sealability sodium battery according to claim 1, wherein: an inner cover plate (9) and a sealing gasket (10) are connected between the outer cover plate (2) and the barrier strip (8), and the sealing gasket (10) is a polytetrafluoroethylene gasket.

4. A high-sealability sodium battery according to claim 1, wherein: the outer surface of the shell (1) is fixedly connected with a plurality of radiating fins (101).

5. A high-sealability sodium battery according to claim 1, wherein: exhaust funnel (11) fixed connection is on the inner wall of cylinder arch (3), and the inside of exhaust funnel (11) sets up spring (13).

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