Novel pressure relief core of energy storage battery

Abstract

The utility model discloses a novel pressure relief core of an energy storage battery, which belongs to the field of energy storage of new energy batteries and comprises a core body, and a pressure relief channel penetrating through two ends of the core body is arranged in the core body. A sealing hole is formed in one end of the pressure relief channel, an exhaust hole is formed in the other end of the pressure relief channel, the diameter of the sealing hole is smaller than that of the exhaust hole, a pressing sleeve is sleeved with the position, corresponding to the core body, of the exhaust hole end in an interference mode, and a pressure relief hole is formed in the pressing sleeve and communicated with the exhaust hole; a core rod is arranged in the pressure relief channel, a sealing gasket is arranged at one end of the core rod, a compression spring is arranged between the other end of the core rod and the pressing sleeve, and the compression spring enables the sealing gasket to block the sealing hole. By means of the structure, the requirements for high-pressure deflation and low-pressure sealing can be met, machining is easy, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the field of new energy battery energy storage, and in particular to a new type of energy storage battery pressure relief core. Background Art

[0002] In recent years, with the rapid development of the new energy industry, the energy storage market as its subsidiary industry has also ushered in explosive growth. In fact, whether it is photovoltaic, wind power, hydropower or other renewable energy, or traditional power grid or internal combustion engine distributed energy, it is inseparable from the support of energy storage technology. The energy storage battery industry has also become a strategic hub for energy transformation.

[0003] With the rapid development of the energy storage battery industry, its safety is also particularly valued by people. Gas will be generated inside the battery during use. When the gas pressure inside the battery is too high and cannot be relieved, the battery will explode, endangering the safety of life and property.

[0004] In view of the above problems existing in the prior art, the present invention combines many years of design and use experience in related fields with strong professional knowledge to design and manufacture a new type of energy storage battery pressure relief core to overcome the above defects. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a novel pressure relief core for an energy storage battery, which can realize the requirements of high-pressure deflation and low-pressure sealing, and is simple to process and convenient to assemble.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a new type of energy storage battery pressure relief core, including a core body, wherein the core body is provided with a pressure relief channel running through both ends of the core body;

[0007] One end of the pressure relief channel is set as a sealing hole, and the other end of the pressure relief channel is set as an exhaust hole. The diameter of the sealing hole is smaller than the diameter of the exhaust hole. A pressing sleeve is connected with an interference sleeve on the core body corresponding to the exhaust hole end. The pressing sleeve is provided with a pressure relief hole connected with the exhaust hole.

[0008] A core rod is provided in the pressure relief channel, a sealing gasket is provided at one end of the core rod, and a compression spring is provided between the other end of the core rod and the pressing sleeve, and the compression spring enables the sealing gasket to block the sealing hole.

[0009] Preferably, a guide column is integrally provided at the end of the core rod close to the sealing hole, and the guide column is matched with the sealing hole guide clearance.

[0010] Preferably, the core rod is provided with a flattened head at one end close to the pressing sleeve, the maximum radial dimension of the flattened head is larger than the diameter of the pressure relief hole, and the minimum radial dimension of the flattened head is smaller than the diameter of the pressure relief hole.

[0011] Preferably, a spacing of no more than 0.7 mm is provided between the end of the flattened head and the pressing sleeve.

[0012] Preferably, a sealing gasket ring groove is provided on the core rod, and the sealing gasket is installed in the sealing gasket ring groove.

[0013] Preferably, a conical transition step is provided between the sealing hole and the exhaust hole, and the sealing gasket abuts against the conical transition step.

[0014] Preferably, the compression spring is sleeved on the core rod, a boss is provided on the core rod, and two ends of the compression spring abut against the boss and the pressing sleeve respectively.

[0015] Preferably, a spring positioning groove is provided on one side of the compression sleeve close to the core body, and one end of the compression spring abuts against the spring positioning groove.

[0016] Preferably, the side wall of the core body close to the pressure relief hole is set as a clearance fit surface, and the clearance fit surface is clearance-fitted with the press sleeve, and the side wall of the core body away from the pressure relief hole is set as an interference fit surface, and the interference fit surface is interference-fitted with the press sleeve.

[0017] Preferably, a radial groove is provided on the end surface of the pressing sleeve away from the core body, and the pressure relief hole is communicated with the radial groove.

[0018] The utility model is beneficial in that:

[0019] 1. The cooperation between the pressing sleeve and the core body of the utility model adopts the interference fitting method, which can be easily achieved by crimping during assembly, and the rapid exhaust is achieved by directly connecting the pressure relief hole on the pressing sleeve with the exhaust hole. The clearance fitting surface on the core body ensures that the core body has a good guiding effect during the process of pressing into the pressing sleeve, and the interference fitting surface on the core body ensures the tightness and sealing of the connection between the core body and the pressing sleeve.

[0020] 2. The utility model utilizes the distance between the milling flat head and the pressing sleeve to limit the moving distance of the core rod, thereby ensuring that the compression spring will not be compressed indefinitely, ensuring that the compression spring is in the best compression state for a long time, and ensuring the stability of the pressure relief value of the product.

[0021] 3. The dimensions of the flattened head and the pressure relief hole of the utility model ensure a good air release channel during pressure release, and at the same time the moving distance of the core rod is limited by the flattened head.

[0022] 4. The guide column on the core rod of the utility model cooperates with the guide clearance of the sealing hole, which ensures that the core rod has a good guiding effect in the active state and does not affect the exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a cross-sectional view of a new type of energy storage battery pressure relief core;

[0024] Figure 2 It is a partial schematic diagram of the utility model at A;

[0025] Figure 3 It is a side sectional view of a new type of energy storage battery pressure relief core;

[0026] Figure 4 It is a cross-sectional view of the sealing hole of the utility model at the opening limit;

[0027] Figure 5 It is a top view of the utility model;

[0028] Figure 6 It is the airflow diagram of the utility model when deflated.

[0029] In the figure: 1-core, 2-pressing sleeve, 3-exhaust hole, 4-core rod, 5-pressure relief hole, 6-compression spring, 7-spring positioning groove, 8-milling flat head, 9-boss, 10-sealing gasket, 11-guide column, 12-sealing hole, 13-conical transition step, 14-clearance fitting surface, 15-interference fitting surface, 16-radial groove. DETAILED DESCRIPTION

[0030] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0031] like Figures 1 to 6 As shown, a new type of pressure relief core of an energy storage battery includes a core body 1, a pressure relief channel penetrating through both ends of the core body 1 is provided in the core body 1, one end of the pressure relief channel is set as a sealing hole 12, and the other end of the pressure relief channel is set as an exhaust hole 3, the diameter of the sealing hole 12 is smaller than the diameter of the exhaust hole 3, and a press sleeve 2 is provided on the end of the exhaust hole 3 corresponding to the core body 1 through interference sleeve connection, and a pressure relief hole 5 is provided on the press sleeve 2 and communicated with the exhaust hole 3. The cooperation of the press sleeve 2 and the core body 1 of the utility model adopts an interference sleeve connection mode, which can be easily achieved by crimping during assembly, and rapid exhaust is achieved by directly communicating the pressure relief hole 5 on the press sleeve 2 with the exhaust hole 3.

[0032] Furthermore, a core rod 4 is provided in the pressure relief channel of the utility model, and a sealing gasket 10 is provided at one end of the core rod 4. Specifically, a ring groove of the sealing gasket 10 is provided on the core rod 4, and the sealing gasket 10 is installed in the ring groove of the sealing gasket 10.

[0033] A compression spring 6 is provided between the other end of the core rod 4 and the pressing sleeve 2. Specifically, the compression spring 6 is sleeved on the core rod 4. A boss 9 is provided on the core rod 4. Both ends of the compression spring 6 are respectively abutted against the boss 9 and the pressing sleeve 2. The compression spring 6 enables the sealing gasket 10 to block the sealing hole 12. When the internal gas pressure of the battery is too large and exceeds the compression value of the compression spring 6, the compression spring 6 is compressed, and the sealing gasket 10 is driven away from the sealing hole 12 by the core rod 4. The internal gas of the battery enters the exhaust hole 3 through the sealing hole 12 and is then discharged through the pressure relief hole 5, thereby ensuring the safety of the battery.

[0034] The core rod 4 is preferably integrally provided with a guide column 11 near the sealing hole 12 end, and the guide column 11 cooperates with the sealing hole 12 with a guide clearance, and the clearance is preferably 0.1mm-0.3mm, thereby ensuring that the core rod 4 has a good guiding effect in the active state without affecting the exhaust.

[0035] The core rod 4 of the utility model is provided with a milled flat head 8 at one end close to the pressing sleeve 2. The maximum radial dimension of the milled flat head 8 is greater than the diameter of the pressure relief hole 5, and the minimum radial dimension of the milled flat head 8 is smaller than the diameter of the pressure relief hole 5. The dimensions of the milled flat head 8 and the pressure relief hole 5 ensure a good air release channel during pressure release.

[0036] A spacing of no more than 0.7 mm is preferably provided between the end of the flattening head 8 and the pressing sleeve 2. The utility model utilizes the spacing between the flattening head 8 and the pressing sleeve 2 to limit the moving distance of the core rod 4, thereby ensuring that the compression spring 6 will not be compressed indefinitely, ensuring that the compression spring 6 is in the optimal compression state for a long time, and ensuring the stability of the pressure relief value of the product.

[0037] In the utility model, a conical transition step 13 is provided between the sealing hole 12 and the exhaust hole 3 , and the sealing gasket 10 abuts against the conical transition step 13 .

[0038] A spring positioning groove 7 is preferably provided on one side of the compression sleeve 2 close to the core body 1, and one end of the compression spring 6 abuts against the spring positioning groove 7. This structure can prevent the compression spring 6 from radial movement, further ensuring the stability of the product pressure relief value.

[0039] To facilitate the assembly of the core body 1 and the pressing sleeve 2, the side wall of the core body 1 close to the pressure relief hole 5 is set as a clearance fit surface 14, and the clearance fit surface 14 is clearance-fitted with the pressing sleeve 2. The clearance fit surface 14 on the core body 1 ensures that the core body 1 has a good guiding effect during the process of being pressed into the pressing sleeve 2. The side wall of the core body 1 away from the pressure relief hole 5 is set as an interference fit surface 15, and the interference fit surface 15 is interference-fitted with the pressing sleeve 2. The interference fit surface 15 on the core body 1 ensures the tightness and sealing of the connection between the core body 1 and the pressing sleeve 2.

[0040] The end surface of the compression sleeve 2 of the utility model away from the core body 1 is provided with a radial recessed groove 16, and the pressure relief hole 5 is connected with the radial recessed groove 16, so as to avoid the top of the pressure relief hole 5 being blocked to affect the exhaust.

[0041] The working principle of this utility model:

[0042] Under normal circumstances, the sealing gasket 10, under the action of the compression spring 6, closely adheres to the conical transition step 13 to block the sealing hole 12;

[0043] When the gas pressure inside the battery is too high and exceeds the compression value of the compression spring 6, the compression spring 6 is compressed, and the sealing gasket 10 moves away from the sealing hole 12 driven by the core rod 4. The gas inside the battery enters the exhaust hole 3 through the sealing hole 12 and is then discharged through the pressure relief hole 5.

[0044] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A new type of energy storage battery pressure relief core, characterized in that: It comprises a core body (1), wherein the core body (1) is provided with a pressure relief channel penetrating through two ends of the core body (1); One end of the pressure relief channel is set as a sealing hole (12), and the other end of the pressure relief channel is set as an exhaust hole (3); the diameter of the sealing hole (12) is smaller than the diameter of the exhaust hole (3); a pressing sleeve (2) is connected to the core (1) at the end of the exhaust hole (3) by an interference sleeve; and a pressure relief hole (5) is provided on the pressing sleeve (2) and is connected to the exhaust hole (3); A core rod (4) is provided in the pressure relief channel, a sealing gasket (10) is provided at one end of the core rod (4), a compression spring (6) is provided between the other end of the core rod (4) and the pressing sleeve (2), and the compression spring (6) enables the sealing gasket (10) to block the sealing hole (12).

2. A novel energy storage battery pressure relief core according to claim 1, characterized in that: The core rod (4) is integrally provided with a guide column (11) at the end close to the sealing hole (12), and the guide column (11) is in a guide clearance fit with the sealing hole (12).

3. A novel energy storage battery pressure relief core according to claim 1, characterized in that: The core rod (4) is provided with a flattened head (8) at one end close to the pressing sleeve (2), the maximum radial dimension of the flattened head (8) being greater than the diameter of the pressure relief hole (5), and the minimum radial dimension of the flattened head (8) being less than the diameter of the pressure relief hole (5).

4. A novel energy storage battery pressure relief core according to claim 3, characterized in that: A spacing of no more than 0.7 mm is provided between the end of the flattening head (8) and the pressing sleeve (2).

5. The novel energy storage battery pressure relief core according to claim 1 is characterized in that: The core rod (4) is provided with a sealing gasket (10) annular groove, and the sealing gasket (10) is installed in the sealing gasket (10) annular groove.

6. The novel energy storage battery pressure relief core according to claim 1 is characterized in that: A conical transition step (13) is provided between the sealing hole (12) and the exhaust hole (3), and the sealing gasket (10) abuts against the conical transition step (13).

7. The novel energy storage battery pressure relief core according to claim 1 is characterized in that: The compression spring (6) is sleeved on the core rod (4), a boss (9) is provided on the core rod (4), and two ends of the compression spring (6) are respectively abutted against the boss (9) and the pressing sleeve (2).

8. The novel energy storage battery pressure relief core according to claim 1 is characterized in that: A spring positioning groove (7) is provided on one side of the compression sleeve (2) close to the core body (1), and one end of the compression spring (6) abuts against the spring positioning groove (7).

9. The novel energy storage battery pressure relief core according to claim 1 is characterized in that: The side wall of the core body (1) at one end close to the pressure relief hole (5) is set as a clearance fit surface (14), and the clearance fit surface (14) is clearance-fitted with the pressing sleeve (2); the side wall of the core body (1) at one end away from the pressure relief hole (5) is set as an interference fit surface (15), and the interference fit surface (15) is interference-fitted with the pressing sleeve (2).

10. The novel energy storage battery pressure relief core according to claim 1, characterized in that: A radial recessed groove (16) is provided on the end surface of the pressing sleeve (2) away from the core body (1), and the pressure relief hole (5) is connected to the radial recessed groove (16).

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