Exhaust structure, battery cover assembly, battery and battery module

Abstract

The utility model discloses an exhaust structure, a battery cover assembly, a battery and a battery module. The exhaust structure comprises a supporting part and a sealing part, the exhaust structure is used for the battery cover, and a first exhaust hole is formed in the battery cover. The supporting part is arranged on the outer surface of the battery cover, a groove is formed in the side, away from the battery cover, of the supporting part, a second exhaust hole penetrating through the supporting part is formed in the bottom wall of the groove, the second exhaust hole is communicated with the first exhaust hole, and a third exhaust hole penetrating through the supporting part is formed in the peripheral wall of the groove; the sealing part comprises a sealing body, an elastic piece and a blocking piece, the sealing body is detachably arranged in the groove and blocks the opening of the groove, the elastic piece is arranged in the groove, one end of the elastic piece is connected with the sealing body, and the blocking piece is connected with the end, away from the sealing body, of the elastic piece and blocks the second exhaust hole. According to the exhaust structure disclosed by the utility model, the exhaust structure can be used for supplementing electrolyte to prolong the service life of the battery, and can also be used for automatically exhausting gas in the battery to ensure the safety performance of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an exhaust structure, a battery cover assembly, a battery and a battery module. Background Art

[0002] In the related technologies, facing the increasingly severe energy crisis and huge pressure to reduce emissions, it is an inevitable development trend for energy-saving and environmentally friendly new energy vehicles to replace traditional fuel vehicles. Lithium-ion or sodium-ion batteries, with their excellent electrical properties and no environmental pollution, have become the most promising power batteries for electric vehicles, with broad market application prospects. The industry has put forward higher and higher requirements on the technical performance, reliability and safety of lithium-ion or sodium-ion batteries. During the use of lithium-ion or sodium-ion batteries, gas will continue to be produced due to internal reactions. Excessive gas production will cause the internal gas pressure of the battery to increase, the battery performance will decrease, and there will be safety risks such as shell deformation, rupture and even explosion. In addition, the electrolyte inside the battery is continuously consumed during use. Once the electrolyte is missing, the battery can no longer be used, affecting the service life of the battery. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an exhaust structure, which can be used to replenish electrolyte to extend the life of the battery, and can also automatically exhaust the gas in the battery to ensure the safety performance of the battery.

[0004] The utility model also provides a battery cover assembly, and the battery cover assembly includes the above-mentioned exhaust structure.

[0005] The utility model also provides a battery, wherein the battery cover assembly comprises the above-mentioned battery cover assembly.

[0006] The utility model also provides a battery module, wherein the battery cover assembly includes the above-mentioned battery.

[0007] According to the exhaust structure of the embodiment of the utility model, it includes: a support part and a sealing part. The exhaust structure is used for a battery cover, and a first exhaust hole is provided on the battery cover. The support part is provided on the outer surface of the battery cover, and the side of the support part away from the battery cover has a groove, and the bottom wall of the groove has a second exhaust hole penetrating the support part, and the second exhaust hole is connected to the first exhaust hole, and the peripheral wall of the groove has a third exhaust hole penetrating the support part; the sealing part includes a sealing body, an elastic member and a blocking member, and the sealing body is detachably provided in the groove and blocks the open mouth of the groove, and at least part of the third exhaust hole is located on the side of the sealing body close to the bottom wall of the groove, the elastic member is provided in the groove and one end is connected to the sealing body, and the blocking member is connected to the end of the elastic member away from the sealing body and blocks the second exhaust hole.

[0008] According to the exhaust structure of the embodiment of the utility model, a support portion with a groove is provided on the outer surface of the battery cover, a second exhaust hole is provided on the bottom wall of the groove which penetrates the support portion and is connected with the first exhaust hole, and a sealing body is detachably arranged in the groove and blocks the open mouth of the groove. When the electrolyte inside the battery is missing, the sealing body can be opened and the electrolyte can be replenished from the open mouth of the groove, thereby extending the life of the battery. In addition, a third exhaust hole is provided on the peripheral wall of the groove and passes through the supporting part. The sealing part includes a sealing body, an elastic member and a blocking member. At least a part of the third exhaust hole is located on a side of the sealing body close to the bottom wall of the groove. The elastic member is arranged in the groove and one end is connected to the sealing body. The blocking member is connected to an end of the elastic member away from the sealing body and blocks the second exhaust hole. Therefore, when the air pressure inside the battery is too high, the elastic member is compressed by the pressure, and the blocking member moves in a direction away from the second exhaust hole, so that the gas can pass through the first exhaust hole and the second exhaust hole and then be automatically discharged from the third exhaust hole, thereby reducing the gas pressure in the battery, avoiding the risk of shell deformation, rupture or even explosion of the battery due to excessive internal pressure, reducing the safety risk of the battery, and ensuring the safety performance of the battery.

[0009] According to some embodiments of the present invention, the surface of the sealing member facing away from the sealing body includes a first conical surface, the bottom wall of the groove is formed as a second conical surface, and the second conical surface and the first conical surface have the same inclination angle and abut against each other.

[0010] According to some embodiments of the present invention, a sealing ring is provided between the support portion and the battery cover, and the sealing ring surrounds the first exhaust hole.

[0011] In some embodiments of the present invention, a sealing groove is provided on a surface of the support portion facing the battery cover, the second exhaust hole passes through a bottom wall of the sealing groove, and the sealing ring is disposed in the sealing groove.

[0012] According to some embodiments of the present invention, an exhaust joint is provided on the outer peripheral wall of the support portion, and the exhaust joint is connected to the third exhaust hole.

[0013] In some embodiments of the present invention, the exhaust connector and the support portion are an integral piece.

[0014] The battery cover assembly according to the embodiment of the utility model comprises: a battery cover and the above-mentioned exhaust structure. The battery cover has a first exhaust hole; the support portion is arranged on the outer surface of the battery cover, the support portion has a groove on the side away from the battery cover, and the bottom wall of the groove has a second exhaust hole penetrating the support portion, and the second exhaust hole is connected to the first exhaust hole.

[0015] According to the battery cover assembly of the embodiment of the utility model, by providing a first exhaust hole on the battery cover and communicating the second exhaust hole of the exhaust structure with the first exhaust hole, the gas inside the battery can be discharged through the first exhaust hole and the second exhaust hole on the battery cover assembly, or the electrolyte can be injected from the outside. By detachably arranging the sealing body in the groove and blocking the opening of the groove, the sealing of the battery is ensured, and when the electrolyte inside the battery is missing, the sealing body in the battery cover assembly can be opened to replenish the electrolyte from the opening of the groove, thereby extending the life of the battery. In addition, a third exhaust hole is provided on the peripheral wall of the groove and passes through the supporting part. At least a part of the third exhaust hole is located on a side of the sealing body close to the bottom wall of the groove. The elastic member is arranged in the groove and one end is connected to the sealing body. The sealing member is connected to the end of the elastic member away from the sealing body and blocks the second exhaust hole. Thereby, the sealing of the battery can be ensured when the battery is in normal use. When the air pressure inside the battery is too high, the elastic member is compressed by the pressure, and the sealing member moves in a direction away from the second exhaust hole, so that the gas can pass through the first exhaust hole and the second exhaust hole and then be automatically discharged from the third exhaust hole, thereby reducing the gas pressure in the battery, avoiding the risk of shell deformation, rupture or even explosion of the battery due to excessive internal pressure, reducing the safety risk of the battery, and ensuring the safety performance of the battery.

[0016] In some embodiments of the present invention, a mounting groove is provided on the outer surface of the battery cover, and a portion of the support portion is located in the mounting groove and is welded to the battery cover.

[0017] A battery according to an embodiment of the utility model includes the above-mentioned battery cover assembly.

[0018] According to the battery of the embodiment of the utility model, by providing a first exhaust hole on the battery cover and communicating the second exhaust hole of the exhaust structure with the first exhaust hole, the gas inside the battery can be discharged through the first exhaust hole and the second exhaust hole on the battery cover assembly, or the electrolyte can be injected from the outside. By detachably arranging the sealing body in the groove and blocking the opening of the groove, the sealing of the battery is ensured, and when the electrolyte inside the battery is missing, the sealing body in the battery cover assembly can be opened to replenish the electrolyte from the opening of the groove, thereby extending the life of the battery. In addition, a third exhaust hole is provided on the peripheral wall of the groove and passes through the supporting part. At least a part of the third exhaust hole is located on a side of the sealing body close to the bottom wall of the groove. The elastic member is arranged in the groove and one end is connected to the sealing body. The sealing member is connected to the end of the elastic member away from the sealing body and blocks the second exhaust hole. Thereby, the sealing of the battery can be ensured when the battery is in normal use. When the air pressure inside the battery is too high, the elastic member is compressed by the pressure, and the sealing member moves in a direction away from the second exhaust hole, so that the gas can pass through the first exhaust hole and the second exhaust hole and then be automatically discharged from the third exhaust hole, thereby reducing the gas pressure in the battery, avoiding the risk of shell deformation, rupture or even explosion of the battery due to excessive internal pressure, reducing the safety risk of the battery, and ensuring the safety performance of the battery.

[0019] According to an embodiment of the utility model, the battery module comprises the above-mentioned battery. The batteries are arranged in a plurality along a first direction, the battery cover is located on one side of the battery along a second direction, the exhaust structures of two adjacent batteries are located at opposite ends in a third direction, the third exhaust holes of the plurality of exhaust structures located at the same end in the third direction have the same orientation and are connected to an exhaust pipe, and the first direction, the second direction and the third direction are perpendicular to each other.

[0020] According to the battery module of the embodiment of the utility model, by providing a first exhaust hole on the battery cover and communicating the second exhaust hole of the exhaust structure with the first exhaust hole, the gas inside the battery can be discharged through the first exhaust hole and the second exhaust hole on the battery cover assembly, or the electrolyte can be injected from the outside. By detachably arranging the sealing body in the groove and blocking the opening of the groove, the sealing of the battery is ensured, and when the electrolyte inside the battery is missing, the sealing body in the battery cover assembly can be opened to replenish the electrolyte of the battery from the opening of the groove, thereby extending the life of the battery module. In addition, the peripheral wall of the groove is provided with a third exhaust hole penetrating the support portion, at least part of the third exhaust hole is located on a side of the sealing body close to the bottom wall of the groove, the elastic member is arranged in the groove and one end is connected to the sealing body, the blocking member is connected to the end of the elastic member away from the sealing body and blocks the second exhaust hole, thereby ensuring the sealing of the battery when the battery is in normal use, when the gas pressure inside the battery is too high, the elastic member is compressed by the pressure, and the blocking member moves in a direction away from the second exhaust hole, so that the gas can pass through the first exhaust hole and the second exhaust hole, and then automatically discharged from the third exhaust hole, reducing the gas pressure in the battery, avoiding the risk of shell deformation, rupture or even explosion of the battery due to excessive internal pressure, reducing the safety risk of the battery, and thus ensuring the safety performance of the battery module. By setting the third exhaust holes of multiple exhaust structures located at the same end in the third direction to face the same direction and be connected to an exhaust pipe, the gas discharged from each battery can be collected and discharged from the battery module in a unified manner, which is convenient for users to use the battery module and uniformly manage the gas discharged from the battery module.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a three-dimensional diagram of a battery according to an embodiment of the utility model, wherein the exhaust structure is an exploded diagram;

[0024] Figure 2 is a cross-sectional view of a battery according to an embodiment of the utility model;

[0025] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 It is a three-dimensional diagram of a battery module according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] 100. Exhaust structure;

[0029] 1. Supporting portion; 11. Groove; 111. Second conical surface; 12. Second exhaust hole; 13. Third exhaust hole; 14. Sealing groove; 15. Exhaust joint;

[0030] 2. Sealing part; 21. Sealing body; 22. Elastic member; 23. Blocking member; 231. First conical surface;

[0031] 3. Sealing ring;

[0032] 200. Battery;

[0033] 4. Battery cover; 41. First exhaust hole; 42. Mounting slot;

[0034] 300. Battery module;

[0035] 5. Exhaust pipe. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 indirectly connected 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.

[0039] Reference below Figure 1-Figure 4 An exhaust structure 100 according to an embodiment of the present invention is described.

[0040] like Figure 1 and Figure 3 As shown, the exhaust structure 100 according to the embodiment of the present utility model includes a supporting portion 1 and a sealing portion 2 .

[0041] Specifically, Figure 1 As shown, combined Figure 2 and Figure 3 , the exhaust structure 100 is used for the battery cover 4, and the battery cover 4 is provided with a first exhaust hole 41 for exhausting the gas generated inside the battery 200 during use. The support part 1 is provided on the outer surface of the battery cover 4. For example, the support part 1 and the outer surface of the battery cover 4 can be welded and connected, which can enhance the connection stability, so that the support part 1 and the battery cover 4 have good stability, sealing and structural strength. The support part 1 has a groove 11 on the side away from the battery cover 4, and the bottom wall of the groove 11 has a second exhaust hole 12 that penetrates the support part 1. The second exhaust hole 12 is connected with the first exhaust hole 41, so that the support part 1 will not block the first exhaust hole 41 on the battery cover 4, and the gas generated by the internal reaction of the battery 200 during use can be discharged through the first exhaust hole 41 and the second exhaust hole 12. On the other hand, the second exhaust hole 12 is connected with the first exhaust hole 41, which is convenient for injecting electrolyte into the battery 200 through the first exhaust hole 41 and the second exhaust hole 12, and the operation is simple and convenient. The peripheral wall of the groove 11 is provided with a third exhaust hole 13 penetrating the support portion 1 , so that the gas inside the battery 200 can be discharged from the support portion 1 through the third exhaust hole 13 after passing through the first exhaust hole 41 and the second exhaust hole 12 , thereby ensuring the smoothness of the exhaust passage.

[0042] In addition, the sealing part 2 includes a sealing body 21, an elastic member 22 and a plugging member 23. The sealing body 21 is detachably arranged in the groove 11 and plugs the open mouth of the groove 11. For example, the sealing body 21 and the groove 11 can be connected by threads. The outer peripheral wall of the sealing body 21 is provided with an external thread, and the open mouth of the groove 11 is provided with an internal thread corresponding to the external thread. The sealing body 21 can be screwed into the open mouth of the groove 11 and fixed by the cooperation of the internal and external threads. The structure is simple, and it can be flexibly disassembled and assembled while ensuring the sealing of the open mouth of the groove 11 by the sealing body 21. Further, when the battery 200 is used for a certain period of time and the electrolyte in the battery 200 is missing, the sealing body 21 can be opened to replenish the electrolyte from the open mouth of the groove 11, thereby extending the life of the battery 200.

[0043] In addition, at least part of the third vent hole 13 is located on the side of the sealing body 21 close to the bottom wall of the groove 11, so as to prevent the sealing body 21 from blocking the third vent hole 13, so as to ensure that the gas in the battery 200 can be discharged from the support part 1 through the third vent hole 13. The elastic member 22 is arranged in the groove 11 and one end is connected to the sealing body 21. The blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second vent hole 12. The elastic member 22 and the sealing body 21 and the blocking member 23 can be welded or clamped. The blocking member 23 blocks the second vent hole 12, which can ensure the sealing of the battery 200 during normal use.

[0044] In the process of using the battery 200, the battery 200 will continuously react to generate gas, and the gas will exert a force on the blocking member 23 in the direction of the elastic member 22, and the gas pressure inside the battery 200 will gradually increase. When the gas pressure inside the battery 200 reaches a certain level, the elastic member 22 is compressed by the pressure, and the blocking member 23 moves in the direction away from the second exhaust hole 12 under the force. At this time, the blocking member 23 no longer blocks the second exhaust hole 12, and the gas in the battery 200 can pass through the first exhaust hole 41 and the second exhaust hole 12, and then automatically discharge from the third exhaust hole 13, and the gas pressure in the battery 200 is reduced, avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200. When the gas pressure inside the battery 200 is reduced to a certain level, the blocking member 23 moves in the direction away from the sealing body 21 under the force of the elastic member 22, and re-blocks the second exhaust hole 12 to ensure the sealing of the battery 200.

[0045] According to the exhaust structure 100 of the embodiment of the utility model, a support portion 1 with a groove 11 is provided on the outer surface of the battery cover 4, a second exhaust hole 12 is provided on the bottom wall of the groove 11 and passes through the support portion 1 and is connected to the first exhaust hole 41, and a sealing body 21 is detachably arranged in the groove 11 and blocks the open mouth of the groove 11. When the electrolyte in the battery 200 is missing, the sealing body 21 can be opened to replenish the electrolyte from the open mouth of the groove 11, thereby extending the life of the battery 200. In addition, a third exhaust hole 13 penetrating the support portion 1 is provided on the peripheral wall of the groove 11, and the sealing portion 2 includes a sealing body 21, an elastic member 22 and a blocking member 23. At least part of the third exhaust hole 13 is located on a side of the sealing body 21 close to the bottom wall of the groove 11. The elastic member 22 is arranged in the groove 11 and one end is connected to the sealing body 21. The blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12. Therefore, when the air pressure inside the battery 200 is too high, the elastic member 22 is compressed by the pressure, and the blocking member 23 moves in a direction away from the second exhaust hole 12, so that the gas can pass through the first exhaust hole 41 and the second exhaust hole 12 and then be automatically discharged from the third exhaust hole 13, thereby reducing the gas pressure in the battery 200, avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200.

[0046] In some embodiments of the present invention, Figure 1 As shown, combined Figure 2 and Figure 3 The surface of the sealing member 23 facing away from the sealing body 21 includes a first conical surface 231, and the bottom wall of the groove 11 is formed as a second conical surface 111. The second conical surface 111 and the first conical surface 231 have the same inclination angle and abut against each other, so that the first conical surface 231 and the second conical surface 111 can fit each other, which can ensure the sealing of the second exhaust hole 12 by the sealing member 23, and further ensure the sealing of the battery 200 during normal use.

[0047] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, a sealing ring 3 is provided between the support portion 1 and the battery cover 4, and the sealing ring 3 surrounds the first exhaust hole 41. The sealing ring 3 can prevent gas from leaking from the contact surface between the support portion 1 and the battery cover 4, and play a role in sealing protection. At the same time, it can also reduce the friction and wear between the support portion 1 and the battery cover 4, and extend the service life of the support portion 1 and the battery cover 4.

[0048] In some embodiments of the present invention, Figure 3As shown, a sealing groove 14 is provided on the surface of one side of the support portion 1 facing the battery cover 4, the second exhaust hole 12 penetrates the bottom wall of the sealing groove 14, and the sealing ring 3 is arranged in the sealing groove 14. The sealing groove 14 provides a certain effective space for the sealing ring 3, which is convenient for installing the sealing ring 3. The second exhaust hole 12 penetrates the bottom wall of the sealing groove 14, so that it can be connected with the first exhaust hole 41, so that the gas inside the battery 200 can pass through and it is convenient to inject electrolyte into the battery 200.

[0049] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, an exhaust connector 15 is provided on the outer peripheral wall of the support portion 1, and the exhaust connector 15 is connected to the third exhaust hole 13. The exhaust connector 15 is provided to facilitate connection with the pipeline, so that the gas inside the battery 200 can be collected and centrally processed after being discharged from the third exhaust hole 13.

[0050] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the exhaust connector 15 and the support portion 1 are an integrated piece, which can enhance the connection stability between the exhaust connector 15 and the support portion 1, and can simplify the installation steps, facilitate assembly and reduce assembly costs.

[0051] The battery cover assembly according to an embodiment of the present utility model is described below.

[0052] The battery cover assembly according to the embodiment of the utility model comprises: a battery cover 4 and the above-mentioned exhaust structure 100 .

[0053] Specifically, Figure 1 As shown, combined Figure 2 and Figure 3 , the battery cover 4 has a first exhaust hole 41 for exhausting the gas generated inside the battery 200 during use. The support portion 1 of the exhaust structure 100 is arranged on the outer surface of the battery cover 4, and the support portion 1 has a groove 11 on the side away from the battery cover 4. The bottom wall of the groove 11 has a second exhaust hole 12 that penetrates the support portion 1, and the second exhaust hole 12 is connected to the first exhaust hole 41. The support portion 1 will not block the first exhaust hole 41 on the battery cover 4, and the gas generated by the internal reaction of the battery 200 during use can be discharged through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly. On the other hand, the second exhaust hole 12 is connected with the first exhaust hole 41, which is convenient for injecting electrolyte into the battery 200 from the groove 11 of the support portion 1 of the exhaust structure 100, and the operation is simple and convenient.

[0054] Among them, the sealing part 2 of the exhaust structure 100 includes a sealing body 21, an elastic member 22 and a sealing member 23. The sealing body 21 is detachably arranged in the groove 11 and seals the open mouth of the groove 11. When the battery 200 is used for a certain period of time and the electrolyte inside the battery 200 is missing, the sealing body 21 can be opened and the electrolyte can be replenished from the open mouth of the groove 11, thereby extending the life of the battery 200.

[0055] In addition, the peripheral wall of the groove 11 is provided with a third exhaust hole 13 penetrating the support portion 1, and at least part of the third exhaust hole 13 is located on the side of the sealing body 21 close to the bottom wall of the groove 11, so as to prevent the sealing body 21 from blocking the third exhaust hole 13, so as to ensure that the gas in the battery 200 can be discharged from the battery cover assembly through the third exhaust hole 13. The elastic member 22 is arranged in the groove 11 and one end is connected to the sealing body 21, and the blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, so as to ensure the sealing of the battery 200 during normal use.

[0056] Furthermore, when the gas pressure inside the battery 200 is too high, the elastic member 22 of the exhaust structure 100 is compressed by pressure, and the blocking member 23 moves in a direction away from the second exhaust hole 12 under the force. At this time, the blocking member 23 no longer blocks the second exhaust hole 12, and the gas in the battery 200 can pass through the first exhaust hole 41 and the second exhaust hole 12, and then automatically discharge from the third exhaust hole 13, and the gas pressure in the battery 200 is reduced, thereby avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200. When the gas pressure inside the battery 200 is reduced to a certain extent, the blocking member 23 moves in a direction close to the second exhaust hole 12 under the force of the elastic member 22, and blocks the second exhaust hole 12 again to ensure the sealing of the battery 200.

[0057] According to the battery cover assembly of the embodiment of the utility model, by providing the first exhaust hole 41 on the battery cover 4 and communicating the second exhaust hole 12 of the exhaust structure 100 with the first exhaust hole 41, the gas inside the battery 200 can be discharged or the electrolyte can be injected from the outside through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly. By detachably arranging the sealing body 21 in the groove 11 and blocking the opening of the groove 11, the sealing of the battery 200 is ensured, and when the electrolyte inside the battery 200 is missing, the sealing body 21 in the battery cover assembly can be opened to replenish the electrolyte from the opening of the groove 11, thereby extending the life of the battery 200. In addition, a third exhaust hole 13 penetrating the support portion 1 is provided on the peripheral wall of the groove 11, and at least a portion of the third exhaust hole 13 is located on a side of the sealing body 21 close to the bottom wall of the groove 11, and the elastic member 22 is disposed in the groove 11 and one end of the sealing body 21 is connected to the sealing body 21, and the sealing member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, thereby ensuring the sealing of the battery 200 when the battery 200 is in normal use. When the air pressure inside the battery 200 is too high, the elastic member 22 is compressed by the pressure, and the sealing member 23 moves in a direction away from the second exhaust hole 12, so that the gas can pass through the first exhaust hole 41 and the second exhaust hole 12, and then be automatically discharged from the third exhaust hole 13, thereby reducing the gas pressure in the battery 200, avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200.

[0058] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, a mounting groove 42 is provided on the outer surface of the battery cover 4, which is convenient for positioning the support part 1 during assembly, and part of the support part 1 is located in the mounting groove 42 and is welded to the battery cover 4. The connection stability can be enhanced, so that the support part 1 and the battery cover 4 have good stability, sealing and structural strength.

[0059] The battery 200 according to an embodiment of the present invention is described below.

[0060] The battery 200 according to the embodiment of the present invention includes the above-mentioned battery cover assembly.

[0061] Specifically, Figure 1 As shown, combined Figure 2 and Figure 3, the battery cover 4 has a first exhaust hole 41 for exhausting the gas generated inside the battery 200 during use. The support portion 1 of the exhaust structure 100 is arranged on the outer surface of the battery cover 4, and the support portion 1 has a groove 11 on the side away from the battery cover 4. The bottom wall of the groove 11 has a second exhaust hole 12 that penetrates the support portion 1, and the second exhaust hole 12 is connected to the first exhaust hole 41. The support portion 1 will not block the first exhaust hole 41 on the battery cover 4, and the gas generated by the internal reaction of the battery 200 during use can be discharged through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly. On the other hand, the second exhaust hole 12 is connected with the first exhaust hole 41, which is convenient for injecting electrolyte into the battery 200 from the groove 11 of the support portion 1 of the exhaust structure 100, and the operation is simple and convenient.

[0062] Among them, the sealing part 2 of the exhaust structure 100 includes a sealing body 21, an elastic member 22 and a sealing member 23. The sealing body 21 is detachably arranged in the groove 11 and seals the open mouth of the groove 11. When the battery 200 is used for a certain period of time and the electrolyte inside the battery 200 is missing, the sealing body 21 can be opened and the electrolyte can be replenished from the open mouth of the groove 11, thereby extending the life of the battery 200.

[0063] In addition, the peripheral wall of the groove 11 is provided with a third exhaust hole 13 penetrating the support portion 1, and at least part of the third exhaust hole 13 is located on the side of the sealing body 21 close to the bottom wall of the groove 11, so as to prevent the sealing body 21 from blocking the third exhaust hole 13, so as to ensure that the gas in the battery 200 can be discharged from the battery cover assembly through the third exhaust hole 13. The elastic member 22 is arranged in the groove 11 and one end is connected to the sealing body 21, and the blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, so as to ensure the sealing of the battery 200 during normal use.

[0064] Furthermore, when the gas pressure inside the battery 200 is too high, the elastic member 22 of the exhaust structure 100 is compressed by pressure, and the blocking member 23 moves in a direction away from the second exhaust hole 12 under the force. At this time, the blocking member 23 no longer blocks the second exhaust hole 12, and the gas in the battery 200 can pass through the first exhaust hole 41 and the second exhaust hole 12, and then automatically discharge from the third exhaust hole 13, and the gas pressure in the battery 200 is reduced, thereby avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200. When the gas pressure inside the battery 200 is reduced to a certain extent, the blocking member 23 moves in a direction close to the second exhaust hole 12 under the force of the elastic member 22, and blocks the second exhaust hole 12 again to ensure the sealing of the battery 200.

[0065] According to the battery 200 of the embodiment of the utility model, by providing the first exhaust hole 41 on the battery cover 4 and communicating the second exhaust hole 12 of the exhaust structure 100 with the first exhaust hole 41, the gas inside the battery 200 can be discharged through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly, or the electrolyte can be injected from the outside. By detachably arranging the sealing body 21 in the groove 11 and blocking the opening of the groove 11, the sealing of the battery 200 is ensured, and when the electrolyte inside the battery 200 is missing, the sealing body 21 in the battery cover assembly can be opened to replenish the electrolyte from the opening of the groove 11, thereby extending the life of the battery 200. In addition, a third exhaust hole 13 penetrating the support portion 1 is provided on the peripheral wall of the groove 11, and at least a portion of the third exhaust hole 13 is located on a side of the sealing body 21 close to the bottom wall of the groove 11, and the elastic member 22 is disposed in the groove 11 and one end of the sealing body 21 is connected to the sealing body 21, and the sealing member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, thereby ensuring the sealing of the battery 200 when the battery 200 is in normal use. When the air pressure inside the battery 200 is too high, the elastic member 22 is compressed by the pressure, and the sealing member 23 moves in a direction away from the second exhaust hole 12, so that the gas can pass through the first exhaust hole 41 and the second exhaust hole 12, and then be automatically discharged from the third exhaust hole 13, thereby reducing the gas pressure in the battery 200, avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200.

[0066] The battery module 300 according to an embodiment of the present invention is described below.

[0067] The battery module 300 according to the embodiment of the present invention includes the battery 200 mentioned above.

[0068] Specifically, Figure 4 As shown, the batteries 200 are arranged in a plurality along the first direction, the battery cover 4 is located on one side of the battery 200 along the second direction, the exhaust structures 100 of two adjacent batteries 200 are located at opposite ends in the third direction, and the battery module 300 has a simple structure and a compact and reasonable layout. The third exhaust holes 13 of the plurality of exhaust structures 100 located at the same end in the third direction have the same orientation and are commonly connected to an exhaust pipe 5, and the first direction, the second direction and the third direction are perpendicular to each other. The exhaust pipe 5 can be made of insulating material such as corrosion-resistant rubber and plastic. The third exhaust holes 13 of the plurality of exhaust structures 100 located at the same end have the same orientation, which can provide convenience for connecting the pipes. The third exhaust holes 13 of each battery 200 are commonly connected to an exhaust pipe 5, so that the gas discharged from each battery 200 can be collected and uniformly discharged from the battery module 300, which is convenient for users to use the battery module 300 and uniformly manage the gas discharged from the battery module 300.

[0069] Furthermore, if Figure 1 As shown, combined Figure 2 and Figure 3 , the battery cover 4 has a first exhaust hole 41 for exhausting the gas generated inside the battery 200 during use. The support portion 1 of the exhaust structure 100 is arranged on the outer surface of the battery cover 4, and the support portion 1 has a groove 11 on the side away from the battery cover 4. The bottom wall of the groove 11 has a second exhaust hole 12 that penetrates the support portion 1, and the second exhaust hole 12 is connected to the first exhaust hole 41. The support portion 1 will not block the first exhaust hole 41 on the battery cover 4, and the gas generated by the internal reaction of the battery 200 during use can be discharged through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly. On the other hand, the second exhaust hole 12 is connected with the first exhaust hole 41, which is convenient for injecting electrolyte into the battery 200 from the groove 11 of the support portion 1 of the exhaust structure 100, and the operation is simple and convenient.

[0070] Among them, the sealing part 2 of the exhaust structure 100 includes a sealing body 21, an elastic member 22 and a sealing member 23. The sealing body 21 is detachably arranged in the groove 11 and seals the open mouth of the groove 11. When the battery 200 is used for a certain period of time and the electrolyte inside the battery 200 is missing, the sealing body 21 can be opened and the electrolyte can be replenished from the open mouth of the groove 11, thereby extending the life of the battery 200.

[0071] In addition, the peripheral wall of the groove 11 is provided with a third exhaust hole 13 penetrating the support portion 1, and at least part of the third exhaust hole 13 is located on the side of the sealing body 21 close to the bottom wall of the groove 11, so as to prevent the sealing body 21 from blocking the third exhaust hole 13, so as to ensure that the gas in the battery 200 can be discharged from the battery cover assembly through the third exhaust hole 13. The elastic member 22 is arranged in the groove 11 and one end is connected to the sealing body 21, and the blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, so as to ensure the sealing of the battery 200 during normal use.

[0072] Furthermore, when the gas pressure inside the battery 200 is too high, the elastic member 22 of the exhaust structure 100 is compressed by pressure, and the blocking member 23 moves in a direction away from the second exhaust hole 12 under the force. At this time, the blocking member 23 no longer blocks the second exhaust hole 12, and the gas in the battery 200 can pass through the first exhaust hole 41 and the second exhaust hole 12, and then automatically discharge from the third exhaust hole 13, and the gas pressure in the battery 200 is reduced, thereby avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and ensuring the safety performance of the battery 200. When the gas pressure inside the battery 200 is reduced to a certain extent, the blocking member 23 moves in a direction close to the second exhaust hole 12 under the force of the elastic member 22, and blocks the second exhaust hole 12 again to ensure the sealing of the battery 200.

[0073] According to the battery module 300 of the embodiment of the utility model, by providing the first exhaust hole 41 on the battery cover 4 and communicating the second exhaust hole 12 of the exhaust structure 100 with the first exhaust hole 41, the gas inside the battery 200 can be discharged through the first exhaust hole 41 and the second exhaust hole 12 on the battery cover assembly, or the electrolyte can be injected from the outside. By detachably arranging the sealing body 21 in the groove 11 and blocking the opening of the groove 11, the sealing of the battery 200 is ensured, and when the electrolyte inside the battery 200 is missing, the sealing body 21 in the battery cover assembly can be opened to replenish the electrolyte of the battery 200 from the opening of the groove 11, thereby extending the life of the battery module 300. In addition, a third exhaust hole 13 penetrating the support portion 1 is provided on the peripheral wall of the groove 11, and at least a portion of the third exhaust hole 13 is located on a side of the sealing body 21 close to the bottom wall of the groove 11, and the elastic member 22 is disposed in the groove 11 and one end is connected to the sealing body 21, and the blocking member 23 is connected to the end of the elastic member 22 away from the sealing body 21 and blocks the second exhaust hole 12, thereby ensuring the sealing of the battery 200 when the battery 200 is in normal use. When the air pressure inside the battery 200 is too high, the elastic member 22 is compressed by the pressure, and the blocking member 23 moves in a direction away from the second exhaust hole 12, so that the gas can pass through the first exhaust hole 41 and the second exhaust hole 12, and then be automatically discharged from the third exhaust hole 13, thereby reducing the gas pressure in the battery 200, avoiding the risk of shell deformation, rupture or even explosion of the battery 200 due to excessive internal pressure, reducing the safety risk of the battery 200, and thereby ensuring the safety performance of the battery module 300. By setting the third exhaust holes 13 of multiple exhaust structures 100 located at the same end in the third direction to have the same direction and to be connected to an exhaust pipe 5, the gases exhausted from each battery 200 can be collected and uniformly discharged from the battery module 300, making it convenient for users to use the battery module 300 and to uniformly manage the gases exhausted from the battery module 300.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An exhaust structure, characterized in that: Used for a battery cover, the battery cover is provided with a first exhaust hole, and the exhaust structure comprises: A support portion, the support portion is arranged on the outer surface of the battery cover, the support portion has a groove on a side away from the battery cover, the bottom wall of the groove has a second exhaust hole penetrating the support portion, the second exhaust hole is connected to the first exhaust hole, and the peripheral wall of the groove has a third exhaust hole penetrating the support portion; The sealing part comprises a sealing body, an elastic member and a blocking member, the sealing body being detachably arranged in the groove and blocking the open mouth of the groove, at least a part of the third exhaust hole being located on a side of the sealing body close to the bottom wall of the groove, the elastic member being arranged in the groove and one end being connected to the sealing body, the blocking member being connected to one end of the elastic member away from the sealing body and blocking the second exhaust hole.

2. The exhaust structure according to claim 1, characterized in that: The surface of the blocking member facing away from the sealing body includes a first conical surface, and the bottom wall of the groove is formed as a second conical surface. The second conical surface and the first conical surface have the same inclination angle and abut against each other.

3. The exhaust structure according to claim 1, characterized in that: A sealing ring is provided between the support portion and the battery cover, and the sealing ring surrounds the first exhaust hole.

4. The exhaust structure according to claim 3, characterized in that: A sealing groove is formed on a surface of the support portion facing the battery cover, the second exhaust hole penetrates through a bottom wall of the sealing groove, and the sealing ring is disposed in the sealing groove.

5. The exhaust structure according to claim 1, characterized in that: An exhaust joint is provided on the outer peripheral wall of the support portion, and the exhaust joint is connected to the third exhaust hole.

6. The exhaust structure according to claim 5, characterized in that: The exhaust connector and the support portion are an integral piece.

7. A battery cover assembly, characterized in that: include: A battery cover, wherein the battery cover has a first exhaust hole; According to the exhaust structure described in any one of claims 1 to 6, the support portion is arranged on the outer surface of the battery cover, the support portion has a groove on the side facing away from the battery cover, the bottom wall of the groove has a second exhaust hole penetrating the support portion, and the second exhaust hole is connected to the first exhaust hole.

8. The battery cover assembly according to claim 7, characterized in that: A mounting groove is provided on the outer surface of the battery cover, and a portion of the support portion is located in the mounting groove and is welded to the battery cover.

9. A battery, characterized in that: Comprising the battery cover assembly according to claim 7 or 8.

10. A battery module, characterized in that: include: According to the battery according to claim 9, the batteries are arranged in plurality along a first direction, the battery cover is located on one side of the battery along a second direction, the exhaust structures of two adjacent batteries are located at opposite ends in a third direction, the third exhaust holes of the plurality of exhaust structures located at the same end in the third direction have the same orientation and are connected to an exhaust pipe in common, and the first direction, the second direction and the third direction are perpendicular to each other.

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