CN222867950U

CN222867950U - Laminated sodium ion battery structure

Info

Publication number: CN222867950U
Application number: CN202421146051.0U
Authority: CN
Inventors: 邹伟民; 康书文; 邹嘉逸
Original assignee: Jiangsu Chuanyi Na Ion Battery Research Institute Co ltd
Current assignee: Jiangsu Chuanyi Na Ion Battery Research Institute Co ltd
Priority date: 2024-05-24
Filing date: 2024-05-24
Publication date: 2025-05-13
Anticipated expiration: 2034-05-24

Abstract

The utility model relates to the technical field of lithium and sodium ion batteries, and provides a laminated sodium ion battery structure which comprises a shell, an electric core and a side cover, wherein the electric core is arranged in the shell, a pressure relief groove is formed in the inner wall of the shell, a pressure relief assembly is arranged in the pressure relief groove, and the pressure relief assembly comprises a pressure flow pipeline. The utility model designs the pressure relief assembly, when the pressure in the shell is overlarge, the pressure is transmitted into the pressure gathering cylinder, the compression spring and the sealing plate to move, so that the vent hole is finally opened and communicated with the pressure relief groove, thereby releasing the pressure in the shell, further reducing the risk of explosion and ensuring the safety and stability of the battery in the use process.

Description

Laminated sodium ion battery structure

Technical Field

The utility model relates to the technical field of lithium and sodium ion batteries, in particular to a laminated sodium ion battery structure.

Background

The sodium ion battery is a secondary battery (rechargeable battery) and has a working principle similar to that of a lithium ion battery, and mainly relies on movement of sodium ions between positive and negative electrodes to realize charge and discharge. During charging, sodium ions are separated from the positive electrode and are inserted into the negative electrode through the electrolyte, and during discharging, sodium ions are separated from the negative electrode and are inserted into the positive electrode through the electrolyte. This movement process stores and releases energy. The sodium ion battery mainly comprises an anode and cathode material, an electrolyte, a diaphragm and an anode and cathode shell. Because the sodium salt is used as the electrode material, compared with a lithium ion battery, the sodium ion battery has the advantages of rich raw material reserves, low price and the like. In addition, they also have the characteristics of high capacity, light weight, less heat generation, low self-discharge and the like. Although sodium ion batteries have a lower energy density than lithium ion batteries, they have a cost advantage in the area of large-scale energy storage, possibly replacing traditional lead acid batteries sodium ion batteries typically consisting of a cathode, an anode and an electrolyte.

In laminated sodium ion batteries, the individual cells are connected in series or in parallel by conductive connections to achieve the desired voltage and capacity. The structure can more flexibly adjust the voltage and the capacity of the battery, and is suitable for different application scenes. The laminated structure also helps to improve the overall performance and stability of the cell, while reducing the internal resistance, and extending the useful life of the cell, the cathode material may be an anode material, which may be carbon or other suitable material, and the electrolyte may be a liquid or solid capable of conducting sodium ions, which together form the structure of the sodium ion cell. The existing lithium ion battery and sodium ion battery have no pressure release function in the use process, particularly in the charging process, the explosion risk exists due to the fact that the pressure inside the battery is large, and the safety problem can be caused.

There is therefore a need for a laminated sodium ion battery structure.

Disclosure of utility model

The utility model aims to solve the defects in the prior art and provides a laminated sodium ion battery structure.

The technical scheme includes that the laminated sodium ion battery structure comprises a shell, an electric core and a side cover, wherein the electric core is arranged in the shell, a pressure relief groove is formed in the inner wall of the shell, and a pressure relief assembly is arranged in the pressure relief groove.

Preferably, the pressure relief assembly comprises a pressure flow pipeline, the pressure flow pipeline is fixed on the inner wall of the shell, and the end face of the pressure flow pipeline is fixedly communicated with a pressure gathering cylinder.

Preferably, the piston is sleeved in the pressure gathering cylinder, the bottom of the piston is fixedly connected with a sliding rod, and the bottom end of the sliding rod is fixedly connected with a sealing plate.

Preferably, the outer wall of the sliding rod is sleeved with a spring, and two ends of the spring are fixedly connected with the bottom of the piston and the inner bottom wall of the pressure gathering cylinder respectively.

Preferably, the inner bottom wall of the pressure relief groove is provided with a vent hole communicated with the inner cavity of the shell, the diameter of the sealing plate is larger than that of the vent hole, the top of the sealing plate is clung to the inner top wall of the shell, and the inner wall of the pressure relief groove is transversely provided with a plurality of through holes at equal intervals.

Preferably, the four corners of the side cover, which is close to one side of the shell, are respectively fixedly connected with an iron clamping rod, a clamping groove for clamping the iron clamping rod is formed in one side of the shell, which is close to the side cover, and a magnet attracted with the iron clamping rod is fixedly connected to the inner wall of the clamping groove.

Preferably, a sealing ring is fixedly connected to one side of the side cover, which is close to the shell, and a sealing groove for clamping the sealing ring is formed in one side of the shell, which is close to the side cover.

The working principle and the beneficial effects of the utility model are as follows:

1. According to the utility model, the pressure release assembly is designed, when the pressure in the shell is overlarge, the pressure is transmitted into the pressure gathering cylinder, the compression spring and the sealing plate to move, so that the vent hole is finally opened and communicated with the pressure release groove, the pressure in the shell is released, the risk of explosion is further reduced, the safety and stability of the battery in the use process can be ensured, and the service life of the battery can be prolonged.

2. The utility model designs the function of the sealing ring to prevent the liquid or gas around the battery cell from leaking, and the iron clamping rod and the magnet can ensure the side cover to be closed at the correct position, thereby not only facilitating the disassembly and assembly of the side cover of the lithium ion battery and the sodium ion battery, but also facilitating the taking out and recycling of the battery cell of the lithium ion battery and the sodium ion battery.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of a split structure according to the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

Fig. 4 is a schematic plan view of the structure of fig. 3 according to the present utility model.

1, A shell, 2, a battery cell, 3, a side cover, 4, a sealing ring, 5, a sealing groove, 6, an iron clamping rod, 7, a magnet, 9, a pressure release assembly, 91, a pressure flow pipeline, 93, a pressure collecting cylinder, 94, a piston, 95, a sliding rod, 96, a spring, 97, a sealing plate, 98, a vent hole, 99 and a through hole.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, the present utility model provides a laminated sodium ion battery structure, which comprises a housing 1, a battery cell 2, and a side cover 3, wherein the battery cell 2 is disposed inside the housing 1;

Four corners of one side of the side cover 3, which is close to the shell 1, are respectively and fixedly connected with an iron clamping rod 6, one side of the shell 1, which is close to the side cover 3, is provided with a clamping groove 7 for clamping the iron clamping rod 6, the inner wall of the clamping groove 7 is fixedly connected with a magnet 7 attracted with the iron clamping rod 6, one side of the side cover 3, which is close to the shell 1, is fixedly connected with a sealing ring 4, one side of the shell 1, which is close to the side cover 3, is provided with a sealing groove 5 for clamping the sealing ring 4, after the battery cell 2 is placed in the shell 1, the iron clamping rod 6 is clamped into the clamping groove 7 to be attracted with the magnet 7, and meanwhile, the sealing ring 4 is clamped into the sealing groove 5 to realize a certain degree of sealing after the battery cell 2 is installed, because the sealing ring 4 is used for preventing liquid or gas around the battery cell 2 from leaking, and the side cover 3 can be ensured to be closed in a correct position by the adsorption of the iron clamping rod 6 and the magnet 7;

Referring to fig. 2-4, in order to release the pressure in the inner cavity of the casing 1, a pressure release groove 11 is specially formed in the inner wall of the casing 1, a pressure release component 9 is arranged in the pressure release groove 11, the pressure release component 9 comprises a pressure flow pipeline 91, the pressure flow pipeline 91 is fixed on the inner wall of the casing 1, the end face of the pressure flow pipeline 91 is fixedly communicated with a pressure collecting cylinder 93, a piston 94 is sleeved in the pressure collecting cylinder 93, a slide bar 95 is fixedly connected to the bottom of the piston 94, a sealing plate 97 is fixedly connected to the bottom of the slide bar 95, a spring 96 is sleeved on the outer wall of the slide bar 95, two ends of the spring 96 are fixedly connected with the bottom of the piston 94 and the inner bottom wall of the pressure collecting cylinder 93 respectively, a vent 98 communicated with the inner cavity of the casing 1 is formed in the inner bottom wall of the pressure release groove 11, the slide bar 95 is sleeved in the vent 98, and the outer wall of the slide bar 95 is not contacted with the inner wall of the vent 98, the diameter of the sealing plate 97 is larger than that of the vent hole 98, the top of the sealing plate 97 is tightly attached to the inner top wall of the shell 1, a plurality of through holes 99 are transversely formed in the inner wall of the pressure relief groove 11 at equal intervals, when the pressure in the inner cavity of the shell 1 is overlarge, the pressure is transmitted into the pressure gathering cylinder 93 through the pressure flow pipeline 91 to push the piston 94 to move the compression spring 96 downwards, meanwhile, the sliding rod 95 pushes the sealing plate 97 to be far away from the inner top wall of the shell 1, the vent hole 98 is opened, the inner cavity of the shell 1 is communicated with the inner cavity of the pressure relief groove 11 through the vent hole 98, the pressure is discharged into the pressure relief groove 11 through the plurality of through holes 99, the pressure in the shell 1 can be released, the explosion risk is reduced, the battery is ensured to be safer and more stable in the use process, the damage to the battery materials and the structure can be reduced by timely releasing the inner pressure, the service life of the battery can be prolonged, the battery can be kept in a working state within a design range by exhausting excessive internal pressure through the vent hole 98, the stability and the reliability of the battery are improved, and when the pressure in the inner cavity of the shell 1 is recovered to be normal, the sealing plate 97 is reset to be clung to the inner top wall of the shell 1 through the spring 96, so that the sealing of the battery is ensured.

After the battery core 2 is placed in the shell 1, the portable side cover 3 enables the iron clamping rod 6 to be clamped into the clamping groove 7 and be attracted with the magnet 7, meanwhile, the sealing ring 4 is clamped into the sealing groove 5, sealing of a certain degree after the battery core 2 is installed can be achieved, when the pressure in the inner cavity of the shell 1 is overlarge, the pressure is transmitted into the pressure gathering cylinder 93 through the pressure flow pipeline 91 to push the piston 94 to move the compression spring 96 downwards, the sliding rod 95 pushes the sealing plate 97 to be far away from the inner top wall of the shell 1, the pressure in the inner cavity of the shell 1 is communicated with the pressure release groove 11 through the air hole 98 after the air hole 98 is opened, the pressure is discharged from the plurality of through holes 99 after being discharged into the pressure release groove 11 through the air hole 98, the overlarge internal pressure can help to avoid explosion or leakage of the battery due to overpressure, so that the safety of the battery is improved, and after the pressure in the inner cavity of the shell 1 is restored to be restored to normal, the sealing plate 97 is reset to be tightly attached to the inner top wall of the shell 1 through the spring 96, and sealing of the battery is guaranteed.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A laminated sodium ion battery structure, comprising a shell (1), a battery cell (2), and a side cover (3), characterized in that the battery cell (2) is arranged inside the shell (1), the inner wall of the shell (1) is provided with a pressure relief groove (11), and a pressure relief component (9) is arranged inside the pressure relief groove (11).

2. A laminated sodium ion battery structure according to claim 1, characterized in that the pressure relief assembly (9) comprises a pressure flow pipe (91), the pressure flow pipe (91) is fixed to the inner wall of the shell (1), and the end face of the pressure flow pipe (91) is fixedly connected to a pressure collecting cylinder (93).

3. A laminated sodium ion battery structure according to claim 2, characterized in that a piston (94) is sleeved inside the pressure-collecting cylinder (93), a sliding rod (95) is fixedly connected to the bottom of the piston (94), and a sealing plate (97) is fixedly connected to the bottom end of the sliding rod (95).

4. A laminated sodium ion battery structure according to claim 3, characterized in that a spring (96) is sleeved on the outer wall of the slide rod (95), and the two ends of the spring (96) are respectively fixedly connected to the bottom of the piston (94) and the inner bottom wall of the pressure-collecting cylinder (93).

5. A laminated sodium ion battery structure according to claim 1, characterized in that the inner bottom wall of the pressure relief groove (11) is provided with a vent hole (98) connected to the inner cavity of the shell (1), the diameter of the sealing plate (97) is larger than the diameter of the vent hole (98), the top of the sealing plate (97) is in close contact with the inner top wall of the shell (1), and the inner wall of the pressure relief groove (11) is provided with a plurality of flow holes (99) at equal intervals in the horizontal direction.

6. A laminated sodium ion battery structure according to claim 1, characterized in that iron clamping rods (6) are fixedly connected to the four corners of the side cover (3) close to the shell (1), and a clamping groove (7) for the iron clamping rod (6) to be clamped is provided on the side of the shell (1) close to the side cover (3), and a magnet (7) that attracts the iron clamping rod (6) is fixedly connected to the inner wall of the clamping groove (7).

7. A laminated sodium ion battery structure according to claim 1, characterized in that a sealing ring (4) is fixedly connected to a side of the side cover (3) close to the shell (1), and a sealing groove (5) for the sealing ring (4) to be clamped is provided on a side of the shell (1) close to the side cover (3).