Lithium battery safety valve with liquid leakage prevention function

Abstract

The utility model discloses a lithium battery safety valve with an anti-leakage function, which relates to the technical field of safety valves and comprises a valve seat, a valve cover and a centralizing groove, a centralizing shell is mounted on the inner wall of the centralizing groove, an integrated leakage sensor is mounted on the inner wall of the centralizing shell, and a collecting pipeline is mounted at the bottom of the centralizing shell. A warning groove is formed in the top of the valve seat, and a warning lamp is installed on the inner wall of the warning groove. According to the utility model, the leakage-proof mechanism is arranged to detect and collect the leakage, firstly, the collecting pipeline is communicated with the space filled with the electrolyte in the battery, and when the electrolyte space is broken and leaks, the electrolyte enters the concentrating shell through the collecting pipeline; and then an integrated liquid leakage sensor senses the electrolyte, so that a warning lamp gives an alarm, and light is emitted to remind that the battery needs to be replaced in time when the battery leaks liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a lithium battery safety valve with a liquid leakage prevention function. Background Art

[0002] A lithium battery safety valve is a device used to protect the safety of lithium batteries. Its main function is to control the gas pressure and temperature inside the lithium battery to prevent dangerous situations such as battery explosion or combustion. Its working principle is that when the internal pressure or temperature of the lithium battery rises, the valve cover will be pushed open to release the internal gas, reduce the pressure and temperature, and protect the battery safety. At the same time, the safety valve can also prevent external impurities such as dust and moisture from entering the battery to ensure the normal operation of the battery. In the design and manufacturing process of lithium batteries, the selection and setting of the safety valve is very important, and factors such as battery specifications, use environment and safety requirements need to be considered. At the same time, for lithium batteries that have been put into use, it is also necessary to regularly inspect and maintain the safety valve to ensure its normal operation, thereby ensuring the safety and reliability of lithium batteries.

[0003] Patent document CN219282515U discloses a lithium battery explosion-proof safety valve, which discloses "including a valve core, a valve bonnet, a sealing ring and an elastic member, the valve core having an outer flange in the middle, the valve core having a threaded end and an abutting end at both ends respectively, the sealing ring being sleeved on the threaded end and abutting against the axial end face of the outer flange, the valve bonnet being a hollow cylindrical structure, the abutting end being inserted into the valve bonnet, and the outer diameter of the outer flange being larger than the inner diameter of the valve bonnet, the elastic member being arranged in the valve bonnet, the abutting end being abutted against the elastic member, an air outlet being arranged at one axial end of the valve bonnet, the air outlet being a straight-line structure, the structural design being simple and ingenious, the response being rapid, the pressure discharge being sensitive, and the production and assembly being convenient, meeting the design and use requirements".

[0004] However, the lithium battery explosion-proof safety valve in the above-mentioned public document mainly considers simple and ingenious structural design, rapid response, sensitive pressure discharge, and convenient production and assembly to meet design and use requirements. It is not convenient to detect and collect leakage to avoid leakage in the battery from entering the valve seat. Because there is liquid inside the existing lithium battery, when the pressure inside the battery is too high, the battery shell may rupture, thereby causing electrolyte leakage, or during the battery manufacturing process, if there are welding leaks, cold welding, cracks and fissures in the weld when welding the battery shell and the cap, or the steel ball size is not appropriate when the steel ball is sealed, and the steel ball material is different from the cap material, all of which may cause battery leakage. When the battery leaks, the liquid will enter the safety valve, causing damage to the safety valve.

[0005] In view of this, it is necessary to develop an anti-leakage mechanism so that the leakage can be detected and collected to prevent the leakage in the battery from entering the valve seat. Utility Model Content

[0006] The utility model aims to provide a lithium battery safety valve with a leakage-proof function, so as to solve the technical problem of making the lithium battery safety valve have the leakage-proof function proposed in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical solutions: a lithium battery safety valve with anti-leakage function, comprising: a valve seat, a valve cover is installed on the inner wall of the valve seat, and an anti-leakage mechanism is provided on the outer wall of the valve seat, and the anti-leakage mechanism is used to detect and collect leakage to prevent leakage in the battery from entering the valve seat;

[0008] The anti-leakage mechanism includes a concentrating groove, which is arranged on the outer wall of the valve seat, a concentrating shell is installed on the inner wall of the concentrating groove, an integrated leakage sensor is installed on the inner wall of the concentrating shell, a collecting pipeline is installed at the bottom of the concentrating shell, a warning groove is provided on the top of the valve seat, and a warning light is installed on the inner wall of the warning groove.

[0009] Preferably, a diaphragm is installed on the inner wall of the valve cover, and a sealing ring is installed on the outer wall of the valve cover.

[0010] Preferably, the inner wall of the valve cover is provided with a replacement mechanism, and the replacement mechanism is used to facilitate the replacement of the diaphragm.

[0011] Preferably, the changing mechanism comprises an L bracket, and the L bracket is arranged on the inner wall of the valve cover.

[0012] Preferably, a locking plate is installed on the outer wall of the L bracket, and a locking screw is installed on the outer wall of the locking plate.

[0013] Preferably, the outer wall of the L bracket is provided with a locking screw groove.

[0014] Preferably, a fitting cushion is installed on the outer wall of the L bracket.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is equipped with a liquid leakage prevention mechanism to detect and collect the liquid leakage to prevent the liquid leakage in the battery from entering the valve seat. There is liquid inside the existing lithium battery, and when the pressure inside the battery is too high, the battery shell may be broken, thereby causing electrolyte leakage. Or in the battery manufacturing process, if there are welding leaks, cold welding, cracks and fissures in the weld when welding the battery shell and the cap, or the steel ball size is not appropriate when the steel ball is sealed, and the material of the steel ball is different from that of the cap, it may cause battery leakage. When the battery leaks, the liquid will enter the safety valve, causing the safety valve to be damaged. Therefore, it is necessary to make the safety valve have a liquid leakage prevention function. First, the collection pipeline is connected to the space inside the battery containing the electrolyte. When the electrolyte space is broken and leaks, the electrolyte will enter the collection shell through the collection pipeline. Then the integrated leakage sensor senses the electrolyte, and then the warning light alarms, and then the light is emitted to remind the battery to be leaking and needs to be replaced in time.

[0017] 2. The utility model is equipped with a convenient replacement mechanism to facilitate the replacement of the diaphragm. After the existing safety valve is used, the diaphragm will be damaged, and the diaphragm cannot be replaced conveniently, which results in that the entire safety valve is usually replaced directly after the safety valve is used, resulting in excessively high replacement costs. Therefore, it is necessary to improve this. When the diaphragm needs to be replaced, the new diaphragm is moved to the L bracket, and then the locking plate is taken out so that one side of the cushion is in contact with the diaphragm, and then the locking screw is fixed to the locking screw groove to limit the position of the diaphragm to prevent the position of the diaphragm from shifting, making it more convenient to replace the new diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a front structural schematic diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the concentrated tank portion of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the collection pipeline part of the utility model;

[0022] Figure 5 This is a schematic diagram of the L bracket structure of the utility model;

[0023] Figure 6 It is a partial structural schematic diagram of the locking plate of the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the fitting cushion part of the utility model.

[0025] In the figure: 1. valve seat; 2. valve cover; 4. diaphragm; 5. sealing ring; 6. centralizing groove; 7. centralizing shell; 8. integrated leakage sensor; 9. collecting pipeline; 10. warning groove; 11. warning light; 12. L bracket; 13. locking plate; 14. locking screw groove; 15. locking screw; 16. fitting cushion. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in 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 in 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.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1 and Figure 2 A lithium battery safety valve with a leakage-proof function comprises: a valve seat 1, a valve cover 2 is installed on the inner wall of the valve seat 1, a diaphragm 4 is installed on the inner wall of the valve cover 2, and a sealing ring 5 is installed on the outer wall of the valve cover 2. The sealing ring 5 is placed under the valve cover 2, and the diaphragm 4 is adhered and installed inside the valve cover 2 by external adhesive, and then the valve cover 2 and the valve seat 1 are assembled and installed in the lithium battery. When the internal pressure or temperature of the lithium battery increases, the diaphragm 4 inside the valve cover 2 will be pushed open, thereby disconnecting the diaphragm 4 from the internal connecting wire of the battery, and when the diaphragm 4 is pushed open, the internal gas is released, the pressure and temperature are reduced, and the battery safety is protected.

[0030] See also Figure 3 and Figure 4 The outer wall of the valve seat 1 is provided with a liquid leakage prevention mechanism, which is used to detect and collect the leakage to prevent the leakage in the battery from entering the valve seat 1. The liquid leakage prevention mechanism includes a concentration groove 6, which is arranged on the outer wall of the valve seat 1. The inner wall of the concentration groove 6 is installed with a concentration shell 7, and the inner wall of the concentration shell 7 is installed with an integrated leakage sensor 8. The bottom of the concentration shell 7 is installed with a collection pipeline 9. The top of the valve seat 1 is provided with a warning groove 10, and the inner wall of the warning groove 10 is installed with a warning light 11. There is liquid inside the existing lithium battery, and when the pressure inside the battery is too high, the battery shell may rupture, thereby causing electrolyte leakage, or during the battery manufacturing process, if the battery shell and the cover are welded The battery may leak if there are welding leaks, cold welding, cracks or fissures in the welds, or the steel ball is of inappropriate size or the material of the steel ball is different from that of the cap. When the battery leaks, the liquid will enter the safety valve and cause damage to the safety valve. Therefore, the safety valve needs to have a leakage-proof function. First, the collecting pipe 9 is connected to the space containing electrolyte inside the battery. When the electrolyte space is broken and leaks, the electrolyte will enter the collecting shell 7 through the collecting pipe 9, and then the integrated leakage sensor 8 will sense the electrolyte, which will cause the warning light 11 to sound an alarm. The light will then be emitted to remind the battery to be leaking and need to be replaced in time.

[0031] See also Figure 5 , Figure 6 and Figure 7 The inner wall of the valve cover 2 is provided with a convenient replacement mechanism, which is used to facilitate the replacement of the diaphragm 4. The convenient replacement mechanism includes an L bracket 12, the L bracket 12 is arranged on the inner wall of the valve cover 2, the outer wall of the L bracket 12 is installed with a locking plate 13, the outer wall of the locking plate 13 is installed with a locking screw 15, the outer wall of the L bracket 12 is provided with a locking screw groove 14, and the outer wall of the L bracket 12 is installed with a fitting cushion 16. After the existing safety valve is used, the diaphragm 4 will be damaged, and the diaphragm 4 cannot be replaced conveniently, which leads to the fact that the entire safety valve is usually replaced directly after the use of the safety valve, resulting in excessively high replacement costs. Therefore, it is necessary to improve this. When the diaphragm 4 needs to be replaced, the new diaphragm 4 is moved into the L bracket 12, and then the locking plate 13 is taken out so that one side of the fitting cushion 16 contacts the diaphragm 4, and then the locking screw 15 is fixed to the locking screw groove 14 to limit the position of the diaphragm 4 to prevent the position of the diaphragm 4 from shifting, making it more convenient to replace the new diaphragm 4.

[0032] Working principle: the sealing ring 5 is placed under the valve cover 2, and the diaphragm 4 is adhered and installed inside the valve cover 2 through external adhesive, and then the valve cover 2 and the valve seat 1 are assembled and installed in the lithium battery. When the internal pressure or temperature of the lithium battery increases, the diaphragm 4 inside the valve cover 2 will be pushed open, thereby disconnecting the diaphragm 4 from the internal connection line of the battery, and the diaphragm 4 is pushed open to release the internal gas, reduce the pressure and temperature, and protect the battery safety. There is liquid inside the existing lithium battery, and when the pressure inside the battery is too high, the battery shell may rupture, thereby causing the electrolyte to leak, or in the battery manufacturing process, if there are welding leaks, cold welding, cracks and fissures in the weld when welding the battery shell and the cap, or the steel ball size is not suitable when the steel ball is sealed, and the steel ball material is different from the cap material, it may cause the battery to leak, and when the battery leaks, the liquid will enter the safety valve, causing the safety valve to be damaged, so it is necessary to make the safety valve The valve has a leakage-proof function. First, the collecting pipe 9 is connected to the space containing electrolyte inside the battery. When the electrolyte space is broken and leaks, the electrolyte will enter the collecting shell 7 through the collecting pipe 9, and then the integrated leakage sensor 8 will sense the electrolyte, so that the warning light 11 will sound an alarm, and then the light will be emitted to remind the battery to be leaking and need to be replaced in time. After the existing safety valve is used, the diaphragm 4 will be damaged, and the diaphragm 4 cannot be replaced conveniently, which leads to the direct replacement of the entire safety valve after the use of the safety valve, resulting in excessive replacement cost. Therefore, it is necessary to improve this. When the diaphragm 4 needs to be replaced, the new diaphragm 4 is moved to the L bracket 12, and then the locking plate 13 is taken out to make one side of the fitting cushion 16 contact with the diaphragm 4, and then the locking screw 15 is fixed to the locking screw groove 14 to limit the position of the diaphragm 4 to prevent the position of the diaphragm 4 from shifting, making it more convenient to replace the new diaphragm 4.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A lithium battery safety valve with a leakage prevention function, comprising: a valve seat (1), the inner wall of the valve seat (1) being provided with a valve cover (2), characterized in that: The outer wall of the valve seat (1) is provided with a liquid leakage prevention mechanism, and the liquid leakage prevention mechanism is used to detect and collect liquid leakage, thereby preventing liquid leakage in the battery from entering the valve seat (1); The anti-leakage mechanism comprises a concentration groove (6), the concentration groove (6) is arranged on the outer wall of the valve seat (1), a concentration shell (7) is installed on the inner wall of the concentration groove (6), an integrated leakage sensor (8) is installed on the inner wall of the concentration shell (7), a collection pipeline (9) is installed on the bottom of the concentration shell (7), a warning groove (10) is provided on the top of the valve seat (1), and a warning light (11) is installed on the inner wall of the warning groove (10).

2. A lithium battery safety valve with anti-leakage function according to claim 1, characterized in that: A diaphragm (4) is installed on the inner wall of the valve cover (2), and a sealing ring (5) is installed on the outer wall of the valve cover (2).

3. A lithium battery safety valve with anti-leakage function according to claim 2, characterized in that: The inner wall of the valve cover (2) is provided with a replacement mechanism, and the replacement mechanism is used to facilitate the replacement of the diaphragm (4).

4. A lithium battery safety valve with anti-leakage function according to claim 3, characterized in that: The changing mechanism comprises an L bracket (12), and the L bracket (12) is arranged on the inner wall of the valve cover (2).

5. A lithium battery safety valve with anti-leakage function according to claim 4, characterized in that: A locking plate (13) is installed on the outer wall of the L bracket (12), and a locking screw (15) is installed on the outer wall of the locking plate (13).

6. A lithium battery safety valve with anti-leakage function according to claim 4, characterized in that: The outer wall of the L bracket (12) is provided with a locking screw groove (14).

7. A lithium battery safety valve with anti-leakage function according to claim 4, characterized in that: The outer wall of the L bracket (12) is provided with a fitting cushion (16).

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