Laminated sodium ion battery structure

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, a battery cell and a side cover, the battery cell 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. According to the utility model, the pressure relief assembly is designed, when the internal pressure of the shell is too large, the pressure is transmitted into the pressure gathering cylinder, the compression spring and the sealing plate to move, and finally the vent hole is opened and is communicated with the pressure relief groove, so that the internal pressure of the shell is released, the risk of explosion is reduced, and the battery is safer and more stable in the use process; according to the utility model, the sealing ring is designed to prevent liquid or gas around the battery cell from leaking, and the side cover can be ensured to be closed at a correct position through the adsorption of the iron clamping rod and the magnet, so that the side cover of the lithium / sodium ion battery can be conveniently disassembled and assembled, and the battery cell of the lithium / sodium ion battery can be conveniently taken out for reuse.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium and sodium ion batteries, and specifically to a laminated sodium ion battery structure. Background Art

[0002] Sodium-ion batteries are secondary batteries (rechargeable batteries) that work in a similar way to lithium-ion batteries, relying mainly on the movement of sodium ions between the positive and negative electrodes to achieve charging and discharging. When charging, sodium ions detach from the positive electrode and are embedded in the negative electrode through the electrolyte; when discharging, on the contrary, sodium ions detach from the negative electrode and are embedded in the positive electrode through the electrolyte. This movement process stores and releases energy. The composition of sodium-ion batteries mainly includes positive and negative electrode materials, electrolytes, separators, and positive and negative electrode shells. Because they use sodium salts as electrode materials, sodium-ion batteries have the advantages of abundant raw material reserves and low prices compared to lithium-ion batteries. In addition, they also have the characteristics of high capacity, light weight, less heat generation, and low self-discharge. Although the energy density of sodium-ion batteries is not as good as that of lithium-ion batteries, they have cost advantages in the field of large-scale energy storage and may replace traditional lead-acid batteries. Sodium-ion batteries are usually composed of cathodes, anodes, and electrolytes.

[0003] In a laminated sodium-ion battery, each battery cell is connected in series or in parallel through a conductive connection to achieve the required voltage and capacity. This structure can adjust the voltage and capacity of the battery more flexibly and is suitable for different application scenarios. The laminated structure also helps to improve the overall performance and stability of the battery, while reducing the internal resistance and extending the service life of the battery. The cathode material can be the anode material, the anode material can be carbon or other suitable materials, and the electrolyte is a liquid or solid that can conduct sodium ions. These parts together constitute the structure of the sodium-ion battery. Existing lithium and sodium-ion batteries do not have a pressure relief function during use. Especially during charging, due to the high pressure inside the battery, there is a risk of explosion, which may cause safety problems.

[0004] Therefore, a laminated sodium ion battery structure is needed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a laminated sodium ion battery structure.

[0006] The technical solution of the utility model is as follows: a laminated sodium ion battery structure, comprising a shell, a battery cell, and a side cover, wherein the battery cell is arranged inside the shell, a pressure relief groove is opened on the inner wall of the shell, and a pressure relief assembly is arranged inside the pressure relief groove.

[0007] Preferably, the pressure relief assembly comprises a pressure flow pipeline, the pressure flow pipeline is fixed to the inner wall of the shell, and the end surface of the pressure flow pipeline is fixedly connected to a pressure collecting cylinder.

[0008] Preferably, a piston is sleeved inside the pressure-gathering cylinder, a sliding rod is fixedly connected to the bottom of the piston, and a sealing plate is fixedly connected to the bottom end of the sliding rod.

[0009] Preferably, a spring is sleeved on the outer wall of the slide rod, and two ends of the spring are fixedly connected to the bottom of the piston and the inner bottom wall of the pressure-collecting cylinder respectively.

[0010] Preferably, the inner bottom wall of the pressure relief groove is provided with a vent hole connected to the inner cavity of the shell, the diameter of the sealing plate is larger than the diameter of the vent hole, the top of the sealing plate is in close contact with the inner top wall of the shell, and the inner wall of the pressure relief groove is provided with a plurality of flow holes equidistantly laterally.

[0011] Preferably, the four corners of the side cover close to the shell are respectively fixedly connected with iron clamping rods, and the shell close to the side cover is provided with a slot for the iron clamping rod to be clamped, and the inner wall of the slot is fixedly connected with a magnet attracted to the iron clamping rod.

[0012] Preferably, a sealing ring is fixedly connected to a side of the side cover close to the shell, and a sealing groove for the sealing ring to engage is provided on a side of the shell close to the side cover.

[0013] The working principle and beneficial effects of the utility model are:

[0014] 1. The utility model is designed with a pressure relief assembly. When the pressure inside the shell is too high, the pressure is transmitted to the pressure-gathering cylinder, the compression spring and the movement of the sealing plate, and finally the vent hole is opened and connected with the pressure relief groove, thereby releasing the pressure inside the shell, thereby reducing the risk of explosion, ensuring that the battery is safer and more stable during use, and helping to extend the service life of the battery.

[0015] 2. The sealing ring designed in the utility model prevents leakage of liquid or gas around the battery cell, and the adsorption of the iron clamp rod and the magnet can ensure that the side cover is closed in the correct position, which is not only convenient for disassembly and assembly of the side cover of the lithium and sodium ion batteries, but also convenient for taking out the battery cells of the lithium and sodium ion batteries for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the separation structure proposed by the utility model;

[0019] Figure 3 It is a cross-sectional structural schematic diagram proposed by the utility model;

[0020] Figure 4 The utility model proposed Figure 3 Schematic diagram of the plan structure.

[0021] In the figure: 1. shell; 2. battery cell; 3. side cover; 4. sealing ring; 5. sealing groove; 6. iron clamping rod; 7. magnet; 9. pressure relief assembly; 91. pressure flow pipe; 93. pressure collecting cylinder; 94. piston; 95. sliding rod; 96. spring; 97. sealing plate; 98. vent hole; 99. flow hole. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4 The utility model provides a technical solution for a laminated sodium ion battery structure: a laminated sodium ion battery structure, comprising a shell 1, a battery cell 2, and a side cover 3, wherein the battery cell 2 is arranged inside the shell 1;

[0024] The four corners of the side cover 3 close to the shell 1 are respectively fixedly connected with iron clamping rods 6, a clamping groove 7 for clamping the iron clamping rod 6 is provided on the side of the shell 1 close to the side cover 3, and a magnet 7 attracted to the iron clamping rod 6 is fixedly connected to the inner wall of the clamping groove 7, and a sealing ring 4 is fixedly connected to the side of the side cover 3 close to the shell 1, and a sealing groove 5 for clamping the sealing ring 4 is provided on the side of the shell 1 close to the side cover 3. After the battery cell 2 is placed in the shell 1, the side cover 3 is carried to make the iron clamping rod 6 clamped into the clamping groove 7 to be attracted to the magnet 7, and at the same time, the sealing ring 4 is clamped into the sealing groove 5 to achieve a certain degree of sealing of the battery cell 2 after installation, because the function of the sealing ring 4 is to prevent the leakage of liquid or gas around the battery cell 2, and the adsorption of the iron clamping rod 6 and the magnet 7 can ensure that the side cover 3 is closed in the correct position;

[0025] refer to Figure 2-Figure 4As shown, in order to relieve the pressure in the inner cavity of the shell 1, the following arrangements are made: the inner wall of the shell 1 is provided with a pressure relief groove 11, and a pressure relief assembly 9 is arranged inside the pressure relief groove 11. The pressure relief assembly 9 includes a pressure flow pipeline 91, and the pressure flow pipeline 91 is fixed to the inner wall of the shell 1. The end surface of the pressure flow pipeline 91 is fixedly connected to a pressure-gathering cylinder 93, and a piston 94 is sleeved inside the pressure-gathering cylinder 93. The bottom of the piston 94 is fixedly connected to a sliding rod 95, and the bottom end of the sliding rod 95 is fixedly connected to a sealing plate 97. The outer wall of the rod 95 is sleeved with a spring 96, and the two ends of the spring 96 are fixedly connected to the bottom of the piston 94 and the inner bottom wall of the pressure-collecting cylinder 93 respectively. 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 slide rod 95 is sleeved inside the vent hole 98, and the outer wall of the slide rod 95 does not contact the inner wall of the vent hole 98. 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. The inner wall of the pressure relief groove 11 is transversely A number of flow holes 99 are equidistantly provided. When the pressure in the inner cavity of the shell 1 is too high, the pressure is transmitted into the pressure-gathering cylinder 93 through the pressure flow pipe 91 to push the piston 94 downward to compress the spring 96. At the same time, the slide rod 95 pushes the sealing plate 97 away from the inner top wall of the shell 1, and the vent 98 is opened. At this time, the inner cavity of the shell 1 is connected with the inner cavity of the pressure relief groove 11 through the vent 98. The pressure is discharged into the pressure relief groove 11 through the vent 98 and discharged through a number of flow holes 99, which can help release the pressure inside the shell 1, thereby reducing the risk of explosion and ensuring that the battery is safer and more stable during use. Timely release of internal pressure can reduce damage to battery materials and structures and help extend the service life of the battery. Discharging excessive internal pressure through the vent 98 can keep the battery in a working state within the designed range, thereby improving the stability and reliability of the battery. When the pressure in the inner cavity of the shell 1 returns to normal, the sealing plate 97 is reset by the spring 96 to fit tightly against the inner top wall of the shell 1, thereby ensuring the sealing of the battery.

[0026] The working principle and use process of the utility model are as follows: after the battery cell 2 is placed in the shell 1, the portable side cover 3 allows the iron clamping rod 6 to be clamped into the clamping groove 7 and attracted by the magnet 7, and at the same time, the sealing ring 4 is clamped into the sealing groove 5 to achieve a certain degree of sealing of the battery cell 2 after installation. When the pressure in the inner cavity of the shell 1 is too large, the pressure is transmitted into the pressure-gathering cylinder 93 through the pressure flow pipe 91 to push the piston 94 to move down the compression spring 96 and make the slide bar 95 push the sealing plate 97 away from the inner top wall of the shell 1. After the vent hole 98 is opened, the pressure in the inner cavity of the shell 1 is connected with the pressure relief groove 11 through the vent hole 98, and the pressure is discharged into the pressure relief groove 11 through the vent hole 98 and then discharged from a plurality of flow holes 99. Releasing the excessive internal pressure can help avoid explosion or leakage of the battery due to overpressure, thereby improving the safety of the battery. After the pressure in the inner cavity of the shell 1 returns to normal, the sealing plate 97 is reset by the spring 96 to be tightly attached to the inner top wall of the shell 1, thereby ensuring the sealing of the battery.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laminated sodium ion battery structure, comprising a housing (1), a battery cell (2), and a side cover (3), characterized in that: The battery core (2) is arranged inside the housing (1); a pressure relief groove (11) is provided on the inner wall of the housing (1); 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 pipeline (91), the pressure flow pipeline (91) is fixed to the inner wall of the shell (1), and the end surface of the pressure flow pipeline (91) is fixedly connected to a pressure collecting cylinder (93).

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

4. A laminated sodium ion battery structure according to claim 3, characterized in that: The outer wall of the slide rod (95) is sleeved with a spring (96), 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) which is in communication with 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) which are equidistantly spaced laterally.

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 clamping the iron clamping rod (6) is provided on the side of the shell (1) close to the side cover (3), and a magnet (7) attracted to 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 the side of the side cover (3) close to the housing (1), and a sealing groove (5) for the sealing ring (4) to be clamped is provided on the side of the housing (1) close to the side cover (3).

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