Top cover assembly of battery and battery monomer

Abstract

The utility model discloses a top cover assembly of a battery and a single battery. The top cover assembly of the battery comprises a cover body, a pole, a riveting block and an upper insulating part, the cover body is provided with a mounting hole which penetrates through the cover body in the thickness direction of the cover body and allows the pole to penetrate through; the riveting block is positioned on one side of the cover body in the thickness direction and is fixedly sleeved on the pole; the upper insulating part comprises a first insulating section, a second insulating section and a third insulating section, the first insulating section sleeves the pole and is located between the riveting block and the cover body, the second insulating section sleeves the riveting block, and one end, close to the cover body, of the second insulating section is connected with one end, away from the center of the pole, of the first insulating section; the third insulating section is annular and is positioned on one side, deviating from the cover body, of the riveting block; one end, deviating from the center of the pole, of the third insulating section is connected with one end, deviating from the cover body, of the second insulating section. According to the top cover assembly of the battery, disclosed by the utility model, the short circuit risk can be reduced, the safety of the battery is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly and a battery monomer. Background Art

[0002] In the related art, the battery is a common energy storage device, which is widely used in electric vehicles, energy storage systems and other fields. The top cover assembly of the battery is one of the important components of the battery, which is used to seal the top of the battery and provide protection and sealing functions. In the top cover assembly of the existing battery, the rivet block is usually designed to be exposed. During the manufacturing process of the battery, it is easy to produce metal wires or metal chips due to scratches, etc., and the rivet block will overlap the battery top cover through the metal wire to conduct electricity, causing the battery to short-circuit, causing the risk of battery corrosion and leakage, greatly reducing the safety and stability of the battery. In addition, a battery short circuit may also cause the entire battery to fail and be scrapped, resulting in a certain waste of resources and economic losses, and the maintenance cost of the battery is also increased. 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 provides a battery top cover assembly, which can reduce the risk of short circuit, improve the safety of the battery and reduce the maintenance cost.

[0004] The utility model also provides a battery cell, which includes the battery top cover assembly mentioned above.

[0005] The top cover assembly of the battery according to the embodiment of the utility model comprises: a cover body, a pole, a rivet block and an upper insulating member. The cover body is provided with a mounting hole penetrating the cover body in the thickness direction of the cover body; the pole is inserted into the mounting hole; the rivet block is located on one side of the thickness direction of the cover body and is sleeved and fixed on the pole; the upper insulating member comprises a first insulating segment, a second insulating segment and a third insulating segment, the first insulating segment is sleeved on the pole and located between the rivet block and the cover body, the second insulating segment is sleeved on the rivet block, one end of the second insulating segment close to the cover body is connected to one end of the first insulating segment away from the center of the pole, the third insulating segment is annular and located on the side of the rivet block away from the cover body, and one end of the third insulating segment away from the center of the pole is connected to one end of the second insulating segment away from the cover body.

[0006] According to the top cover assembly of the battery in the embodiment of the utility model, by setting the upper insulating part as the first insulating section, the second insulating section and the third insulating section which are connected in sequence, the first insulating section is located between the riveted block and the cover body, thereby effectively improving the insulation effect between the riveted block and the cover body; the second insulating section is sleeved on the riveted block, the third insulating section is annular and is arranged on the side of the riveted block away from the cover body, and the end of the third insulating section away from the center of the pole is connected to the second insulating section, which can avoid the side wall surface of the riveted block away from the center of the pole and the surface of the riveted block away from the cover body being connected to the cover body for conduction and causing a short circuit, thereby reducing the risk of battery corrosion, leakage or even scrapping, thereby improving the safety and stability of the battery and reducing the maintenance cost of the battery.

[0007] According to some embodiments of the utility model, a side of the riveting block facing away from the cover body is provided with an annular groove extending along the circumferential direction of the riveting block, a side of the annular groove facing away from the pole is open, and the third insulating section is located in the annular groove.

[0008] In some embodiments of the present invention, a surface of the third insulating segment facing away from the cover body is flush with a surface of the rivet block facing away from the cover body.

[0009] In some embodiments of the present invention, along the thickness direction of the cover body, the depth of the annular groove is 0.5 mm-1.5 mm.

[0010] In some embodiments of the present invention, along the radial direction of the pole, the distance between one end of the third insulating segment close to the pole and the inner circumferential wall of the second insulating segment is 0.5 mm-1.5 mm.

[0011] According to some embodiments of the present invention, a plurality of spaced-apart protrusions are provided on one side of the first insulating segment facing the riveting block, and the riveting block is provided with grooves matching with the protrusions.

[0012] In some embodiments of the present invention, the first insulating segment has a plurality of through holes, the plurality of through holes correspond to the plurality of protrusions one by one, and the plurality of through holes respectively penetrate the plurality of protrusions.

[0013] According to some embodiments of the utility model, the pole is provided with a connecting portion, and the connecting portion is located on the side of the cover body away from the riveting block. The top cover assembly of the battery also includes: a sealing ring and a lower plastic. The sealing ring is sleeved on the pole upper device and is at least partially located between the inner peripheral wall of the mounting hole and the outer peripheral wall of the pole; the lower plastic is located on the side of the cover body away from the riveting block and is at least partially located between the connecting portion and the cover body.

[0014] In some embodiments of the utility model, the sealing ring includes a first sealing section and a second sealing section, the first sealing section is at least partially located between the inner circumferential wall of the mounting hole and the outer circumferential wall of the pole, the second sealing section is connected to the first sealing section and is at least partially located between the connecting portion and the surface of the cover body facing away from the rivet block; and / or, an annular limiting portion is provided on the side of the lower plastic facing away from the cover body, and the annular limiting portion is sleeved outside the connecting portion.

[0015] A battery cell according to an embodiment of the utility model includes: the above-mentioned battery top cover assembly.

[0016] According to the battery cell of the embodiment of the utility model, by setting the upper insulating part as the first insulating section, the second insulating section and the third insulating section which are connected in sequence, the first insulating section is located between the riveted block and the cover body, thereby effectively improving the insulation effect between the riveted block and the cover body; the second insulating section is sleeved on the riveted block, the third insulating section is annular and is arranged on the side of the riveted block away from the cover body, and the end of the third insulating section away from the center of the pole is connected to the second insulating section, which can avoid the side wall surface of the riveted block away from the center of the pole and the surface of the riveted block away from the cover body being connected to the cover body for conduction and causing a short circuit, thereby reducing the risk of corrosion, leakage and even scrapping of the battery cell, thereby improving the safety and stability of the battery cell and reducing the maintenance cost of the battery cell.

[0017] 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

[0018] 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:

[0019] Figure 1 is a three-dimensional diagram of a top cover assembly of a battery according to an embodiment of the utility model;

[0020] Figure 2 is a top view of a top cover assembly of a battery according to an embodiment of the utility model;

[0021] Figure 3 is along Figure 2 Sectional view along line AA;

[0022] Figure 4 is a three-dimensional diagram of an upper insulating member according to an embodiment of the utility model;

[0023] Figure 5 It is a three-dimensional diagram of a riveting block according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 100. A top cover assembly of a battery;

[0026] 1. Cover body; 11. Mounting hole;

[0027] 2. Pole; 21. Positive pole; 22. Negative pole; 23. Connecting part;

[0028] 3. Riveting block; 31. Annular groove; 32. First through hole;

[0029] 4. upper insulating member; 41. first insulating section; 411. protrusion; 412. through hole; 413. second through hole; 42. second insulating section; 43. third insulating section;

[0030] 5. Sealing ring; 51. First sealing section; 52. Second sealing section; 521. Step;

[0031] 6. lower plastic; 61. annular limiting portion; 62. snap-fit ​​groove. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Reference below Figure 1-Figure 5 A top cover assembly 100 of a battery according to an embodiment of the present invention is described.

[0036] like Figure 1 and Figure 2 As shown, combined Figure 3 According to an embodiment of the utility model, the top cover assembly 100 of the battery includes a cover body 1, a pole 2, a riveting block 3 and an upper insulating member 4.

[0037] Specifically, Figure 1 and Figure 2 As shown, combined Figure 3 The cover body 1 is provided with a mounting hole 11 which penetrates the cover body 1 in the thickness direction of the cover body 1. The pole 2 is inserted into the mounting hole 11. The pole 2 can be a positive pole 21 or a negative pole 22. The positive pole 21 is connected to the positive pole ear, and the negative pole 22 is connected to the negative pole ear. The pole 2 can extend through the cover body 1 through the mounting hole 11, so as to be conveniently connected with the pole 2 of other batteries or an external circuit.

[0038] In addition, the riveting block 3 is located on one side of the cover body 1 in the thickness direction and is sleeved and fixed on the pole 2. The riveting block 3 can be connected with other components to realize the connection between the pole 2 and the external components, which is convenient for the connection between the pole 2 and the external components. Specifically, the riveting block 3 has a first through hole 32 that penetrates the riveting block 3 in the thickness direction of the riveting block 3, which is convenient for the pole 2 to pass through the first through hole 32 and be fixed to the riveting block 3. The riveting block 3 and the pole 2 can be connected together by laser welding and riveting assembly. Among them, the riveting block 3 can be welded with the bus bar to realize the connection and conduction between different batteries.

[0039] Furthermore, the upper insulating member 4 includes a first insulating segment 41, a second insulating segment 42 and a third insulating segment 43. The upper insulating member 4 has good insulating properties. The first insulating segment 41 is sleeved on the pole 2 and is located between the riveting block 3 and the cover body 1. The first insulating segment 41 has a second through hole 413 that penetrates the first insulating segment 41 in the thickness direction of the first insulating segment 41, so that the pole 2 can pass through the first insulating segment 41. The first insulating segment 41 is arranged between the riveting block 3 and the cover body 1, which can prevent the cover body 1 from directly contacting the riveting block 3 and avoid short circuits caused by the connection and conduction between the cover body 1 and the pole 2, thereby reducing the risk of leakage, thereby improving the safety and stability of the battery.

[0040] The second insulating section 42 is sleeved on the riveting block 3, and one end of the second insulating section 42 close to the cover body 1 is connected to the end of the first insulating section 41 away from the center of the pole 2, which can cover the side wall surface of the riveting block 3 away from the center of the pole 2 with an insulating layer, so as to prevent the surface of the riveting block 3 away from the center of the pole 2 from being connected to the cover body 1 through the metal wire generated by the scratches during the production process and short-circuiting, thereby reducing the risk of battery corrosion, leakage or even scrapping, thereby improving the safety and stability of the battery. At the same time, it can also prevent the battery from being scrapped due to a short circuit, causing certain waste of resources and economic losses, thereby reducing the maintenance cost of the battery.

[0041] The third insulating section 43 is annular and is located on the side of the riveting block 3 away from the cover body 1. The end of the third insulating section 43 away from the center of the pole 2 is connected to the end of the second insulating section 42 away from the cover body 1. A circle of insulating layer can be covered on the surface of the riveting block 3 away from the cover body 1, further preventing the surface of the riveting block 3 away from the cover body 1 from being connected to the cover body 1 through metal wires generated by scratches during the production process and short-circuiting, reducing the risk of battery corrosion, leakage or even scrapping, and further improving the safety and stability of the battery. At the same time, it can also prevent the battery from being scrapped due to a short circuit, causing certain waste of resources and economic losses, thereby reducing the maintenance cost of the battery.

[0042] Preferably, the upper insulating member 4 is made of a material such as PPS (Polyphenylene sulfide), which has good insulation and corrosion resistance as well as good high temperature resistance, thereby avoiding damage to the upper insulating member 4 caused by high temperature generated by welding of the riveted block 3, ensuring the insulation effect of the upper insulating member 4, and preventing the battery from leaking, exploding or other safety accidents, thereby enhancing the safety and reliability of the battery.

[0043] According to the top cover assembly 100 of the battery of the embodiment of the utility model, by setting the upper insulating member 4 as the first insulating segment 41, the second insulating segment 42 and the third insulating segment 43 which are connected in sequence, the first insulating segment 41 is located between the riveting block 3 and the cover body 1, thereby effectively improving the insulation effect between the riveting block 3 and the cover body 1; the second insulating segment 42 is sleeved on the riveting block 3, the third insulating segment 43 is annular and is arranged on the side of the riveting block 3 away from the cover body 1, and the end of the third insulating segment 43 away from the center of the pole 2 is connected to the second insulating segment 42, which can avoid the side wall surface of the riveting block 3 away from the center of the pole 2 and the surface of the riveting block 3 away from the cover body 1 being connected to the cover body 1 for conduction and causing a short circuit, thereby reducing the risk of battery corrosion, leakage or even scrapping, thereby improving the safety and stability of the battery and reducing the maintenance cost of the battery.

[0044] In some embodiments of the present invention, Figure 3 and Figure 5 As shown, the side of the riveting block 3 away from the cover body 1 is provided with an annular groove 31 extending along the circumferential direction of the riveting block 3, and the side of the annular groove 31 away from the pole 2 is open, so as to facilitate the assembly of the riveting block 3 and the upper insulating member 4, and the third insulating segment 43 is located in the annular groove 31. As a result, it is beneficial to align and position the riveting block 3 and the upper insulating member 4 during assembly, reduce the difficulty of assembly, and help ensure the assembly quality. At the same time, it also increases the fit and contact area between the third insulating segment 43 and the riveting block 3, which can improve the stability of the connection between the riveting block 3 and the upper insulating member 4, thereby improving the stability of the battery.

[0045] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the surface of the third insulating segment 43 facing away from the cover body 1 is flush with the surface of the rivet block 3 facing away from the cover body 1, which increases the neatness of the structure and facilitates welding of the surface of the rivet block 3 facing away from the cover body 1 with a bus bar or the like to achieve connection and conduction between battery cells, which can reduce the difficulty of welding operation and is beneficial to ensuring the quality and reliability of the welding connection.

[0046] In some embodiments of the present invention, Figure 3As shown, along the thickness direction of the cover body 1, the depth of the annular groove 31 is 0.5mm-1.5mm. If the depth of the annular groove 31 is less than 0.5mm, the depth is too small, and the thickness of the third insulating segment 43 located in the annular groove 31 will be too thin accordingly, resulting in low structural strength, which affects the service life of the third insulating segment 43 and the stability of the connection between the rivet block 3 and the upper insulating member 4. If the depth of the annular groove 31 is greater than 1.5mm, the thickness of the end of the rivet block 3 away from the center of the pole 2 is too thin, which affects the structural strength and stability of the connection between the rivet block 3 and the third insulating segment 43. If the depth of the annular groove 31 is 0.5mm-1.5mm, the structural strength of the end of the rivet block 3 away from the center of the pole 2 and the third insulating segment 43 can be guaranteed, and the stability of the connection between the rivet block 3 and the upper insulating member 4 can be guaranteed.

[0047] In some embodiments of the present invention, Figure 3 As shown, along the radial direction of the pole 2, the distance between the end of the third insulating segment 43 close to the pole 2 and the inner circumferential wall of the second insulating segment 42 is 0.5mm-1.5mm. If the above distance is too small, the length of the third insulating segment 43 in the radial direction of the pole 2 is too small, and the structural strength is too low, which affects the service life of the third insulating segment 43 and the stability of the connection between the rivet block 3 and the upper insulating member 4. On the other hand, if the distance is too small, the insulating layer area covered on the surface of the rivet block 3 away from the cover body 1 is too small. The surface of the rivet block 3 away from the cover body 1 is easily connected to the cover body 1 through the metal wire generated by the scratches during the production process, resulting in a short circuit, and the risk of battery corrosion, leakage or even scrapping is increased, which greatly reduces the safety and stability of the battery. If the above distance is too large, the length of the third insulating segment 43 in the radial direction of the pole 2 is too large, which increases the difficulty of assembling the rivet block 3 and the upper insulating member 4, and is not conducive to the welding connection between the rivet block 3 and other components. The above distance is limited to 0.5mm-1.5mm, so that the length of the third insulating section 43 in the radial direction of the pole 2 is moderate, which is conducive to the assembly of the riveting block 3 and the upper insulating member 4 and the welding connection between the riveting block 3 and other components, and can ensure the stability of the connection between the riveting block 3 and the upper insulating member 4, reduce the risk of battery corrosion, leakage or even scrapping due to short circuit, and thus ensure the safety and stability of the battery.

[0048] In some embodiments of the present invention, Figure 4As shown, a plurality of spaced protrusions 411 are provided on one side of the first insulating section 41 facing the rivet block 3, and a groove cooperating with the protrusion 411 is provided on the rivet block 3. On the one hand, by respectively providing the protrusions 411 and the grooves that can correspond to each other on the first insulating section 41 and the rivet block 3, it is convenient to align and position the rivet block 3 and the upper insulating member 4 during assembly, reduce the difficulty of assembly, help to ensure the assembly quality, and also increase the stability of the connection between the rivet block 3 and the upper insulating member 4. On the other hand, the protrusions 411 and the grooves can also enhance the structural strength of the rivet block 3 and the upper insulating member 4. Through the mutual cooperation of the protrusions 411 and the grooves, the anti-rotation ability of the rivet block 3 and the upper insulating member 4 after assembly can be enhanced, thereby improving the anti-torsion and anti-thrust capabilities of the battery top cover assembly 100, and enhancing the reliability and stability of the battery.

[0049] In some embodiments of the present invention, Figure 4 As shown, the first insulating segment 41 has a plurality of through holes 412, and the plurality of through holes 412 correspond to the plurality of protrusions 411 one by one, and the plurality of through holes 412 respectively penetrate the plurality of protrusions 411. On the basis of ensuring the positioning of the protrusions 411 and the role of strengthening the structure, the material used in the structure of the protrusions 411 can be reduced, the weight of the first insulating segment 41 can be reduced, and the manufacturing cost of the first insulating segment 41 can be reduced, thereby reducing the weight and cost of the top cover assembly 100 of the battery.

[0050] In some embodiments of the present invention, Figure 3 As shown, a connecting portion 23 is provided on the pole 2, and the connecting portion 23 is located on the side of the cover body 1 away from the rivet block 3. The connecting portion 23 can be used for welding connection with the pole ear. The cover body 1 can fix the pole 2 through the connecting portion 23 and the rivet block 3 to prevent the pole 2 from moving toward the direction close to the rivet block 3, which is beneficial to the fixation and assembly of the battery top cover assembly 100 and can ensure the stability of the battery top cover assembly 100.

[0051] In this application, if Figure 3As shown, the top cover assembly 100 of the battery also includes: a sealing ring 5 and a lower plastic 6. The sealing ring 5 is sleeved on the pole 2 and is at least partially located between the inner peripheral wall of the mounting hole 11 and the outer peripheral wall of the pole 2. On the one hand, the sealing ring 5 can play an insulating role to prevent the cover body 1 from directly contacting and conducting with the pole 2 and causing a short circuit, thereby reducing the risk of leakage, thereby improving the safety and stability of the battery. On the other hand, the sealing ring 5 can form an effective seal between the mounting hole 11 and the pole 2 to prevent the electrolyte and other materials inside the battery from leaking through the mounting hole 11, and at the same time, it can also protect the battery from the influence of the external environment. In addition, the lower plastic 6 is located on the side of the cover body 1 away from the riveting block 3 and is at least partially located between the connecting portion 23 and the cover body 1. The lower plastic 6 can play an insulating role to prevent the cover body 1 from directly contacting and conducting with the connecting portion 23 of the pole 2 and causing a short circuit, thereby reducing the risk of leakage, thereby improving the safety and stability of the battery.

[0052] In the present application, the top cover assembly 100 of the battery has a stable structure through the combination of the cover body 1, the pole 2, the riveted block 3, the upper insulating member 4, the sealing ring 5 and the lower plastic 6, which helps to protect the internal components of the battery from external impact and vibration, and improve the mechanical strength and reliability of the battery. At the same time, the top cover assembly 100 of the battery also has the function of moisture-proof and anti-oxidation, which can block moisture and oxygen from entering the battery and protect the internal components of the battery from corrosion and oxidation.

[0053] In some embodiments of the present invention, Figure 3 As shown, the sealing ring 5 includes a first sealing section 51 and a second sealing section 52. The first sealing section 51 is at least partially located between the inner peripheral wall of the mounting hole 11 and the outer peripheral wall of the pole 2, and can form an effective seal between the mounting hole 11 and the pole 2. The second sealing section 52 is connected to the first sealing section 51 and is at least partially located between the connecting portion 23 and the surface of the cover body 1 away from the riveting block 3, which can provide a good sealing effect between the connecting portion 23 and the cover body 1, can better prevent the leakage of materials such as electrolyte inside the battery, and can also protect the battery from the influence of the external environment.

[0054] Furthermore, if Figure 3As shown, one end of the second sealing segment 52 away from the center of the pole 2 abuts against the radial inner end of the lower plastic 6, and a side of the lower plastic 6 away from the cover body 1 is provided with a clamping groove 62 extending in the circumferential direction of the radial inner end of the lower plastic 6, and the side of the clamping groove 62 close to the pole 2 is open, and one end of the second sealing segment 52 away from the center of the pole 2 is provided with a step 521 that can match the clamping groove 62 at the radial inner end of the lower plastic 6, which is convenient for positioning the sealing ring 5 and the lower plastic 6 during assembly, and also provides a good sealing effect between the connecting portion 23 and the lower plastic 6, better fills the gap between the connecting portion 23 and the lower plastic 6, further prevents the leakage of materials such as electrolyte inside the battery, and also protects the battery from the influence of the external environment.

[0055] In this application, if Figure 3 As shown, the side of the lower plastic 6 away from the cover body 1 is provided with an annular limiting portion 61, which is sleeved outside the connecting portion 23, and provides insulation protection for the surface of the connecting portion 23 away from the center of the pole 2, and also plays a limiting role, which helps to prevent the displacement of the pole 2 and further enhance the structural stability of the battery. Of course, the annular limiting portion 61 can also play a positioning role, which facilitates the assembly of the pole 2 and the lower plastic 6.

[0056] A battery cell according to an embodiment of the present invention is described below.

[0057] The battery cell according to the embodiment of the present invention includes: the battery top cover assembly 100 mentioned above.

[0058] Specifically, Figure 1 and Figure 2 As shown, combined Figure 3 The top cover assembly 100 of the battery includes a cover body 1, a pole 2, a riveting block 3 and an upper insulating member 4. The cover body 1 is provided with a mounting hole 11 that penetrates the cover body 1 in the thickness direction of the cover body 1. The pole 2 is inserted into the mounting hole 11. The pole 2 can be a positive pole 21 or a negative pole 22. The positive pole 21 is connected to the positive pole ear, and the negative pole 22 is connected to the negative pole ear. The pole 2 can pass through the cover body 1 and extend through the mounting hole 11, so as to be conveniently connected with the pole 2 of other battery cells or an external circuit.

[0059] In addition, the rivet block 3 is located on one side of the cover body 1 in the thickness direction and is fixedly mounted on the pole 2. The rivet block 3 can be connected to other components to achieve the connection between the pole 2 and external components, which is convenient for the connection between the pole 2 and external components. Specifically, the rivet block 3 has a first through hole 32 that penetrates the rivet block 3 in the thickness direction of the rivet block 3, which is convenient for the pole 2 to pass through the first through hole 32 and be fixed to the rivet block 3. The rivet block 3 and the pole 2 can be connected together by laser welding and riveting assembly. Among them, the rivet block 3 can be welded to the bus bar to achieve connection and conduction between different battery cells, and multiple battery cells can be connected in series and parallel to form a battery pack.

[0060] Furthermore, the upper insulating member 4 includes a first insulating segment 41, a second insulating segment 42 and a third insulating segment 43. The upper insulating member 4 has good insulating properties. The first insulating segment 41 is sleeved on the pole 2 and is located between the riveting block 3 and the cover body 1. The first insulating segment 41 has a hole that penetrates the first insulating segment 41 in the thickness direction of the first insulating segment 41, so that the pole 2 can pass through the first insulating segment 41. The first insulating segment 41 is arranged between the riveting block 3 and the cover body 1, which can prevent the cover body 1 from directly contacting the riveting block 3 and avoid the cover body 1 and the pole 2 from being connected and conductive and causing a short circuit, thereby reducing the risk of leakage, and thus improving the safety and stability of the battery cell.

[0061] The second insulating section 42 is sleeved on the riveted block 3, and one end of the second insulating section 42 close to the cover body 1 is connected to the end of the first insulating section 41 away from the center of the pole 2, so that a layer of insulating layer can be covered on the side wall surface of the riveted block 3 away from the center of the pole 2, thereby preventing the surface of the riveted block 3 away from the center of the pole 2 from being connected to the cover body 1 through metal wires generated by scratches during the production process and causing short circuits, thereby reducing the risk of corrosion, leakage, and even scrapping of the battery cell, thereby improving the safety and stability of the battery cell and reducing the maintenance cost of the battery cell.

[0062] The third insulating section 43 is annular and is located on the side of the riveting block 3 away from the cover body 1, and the end of the third insulating section 43 away from the center of the pole 2 is connected to the end of the second insulating section 42 away from the cover body 1. A circle of insulating layer can be covered on the surface of the riveting block 3 away from the cover body 1, further preventing the surface of the riveting block 3 away from the cover body 1 from being connected to the cover body 1 through metal wires generated by scratches during the production process to conduct electricity and cause a short circuit, reducing the risk of corrosion, leakage, or even scrapping of the battery cell, thereby further improving the safety and stability of the battery cell and reducing the maintenance cost of the battery cell.

[0063] Preferably, the upper insulating member 4 is made of a material such as PPS (Polyphenylene sulfide), which has good insulation and corrosion resistance as well as good high temperature resistance, thereby avoiding damage to the upper insulating member 4 caused by high temperature generated by welding of the riveted block 3, ensuring the insulation effect of the upper insulating member 4, and thereby enhancing the safety and reliability of the battery cell.

[0064] According to the battery cell of the embodiment of the utility model, by setting the upper insulating member 4 as the first insulating segment 41, the second insulating segment 42 and the third insulating segment 43 which are connected in sequence, the first insulating segment 41 is located between the riveting block 3 and the cover body 1, thereby effectively improving the insulation effect between the riveting block 3 and the cover body 1; the second insulating segment 42 is sleeved on the riveting block 3, the third insulating segment 43 is annular and is arranged on the side of the riveting block 3 away from the cover body 1, and the end of the third insulating segment 43 away from the center of the pole 2 is connected to the second insulating segment 42, which can avoid the side wall surface of the riveting block 3 away from the center of the pole 2 and the surface of the riveting block 3 away from the cover body 1 being connected to the cover body 1 for electrical conduction and causing a short circuit, thereby reducing the risk of corrosion, leakage or even scrapping of the battery cell, thereby improving the safety and stability of the battery cell and reducing the maintenance cost of the battery cell.

[0065] Other components of the battery cell according to the embodiment of the present invention, such as the positive electrode ear and the negative electrode ear, are known to those skilled in the art and will not be described in detail here.

[0066] 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.

[0067] 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. A top cover assembly of a battery, characterized in that: include: A cover body, wherein the cover body is provided with a mounting hole penetrating the cover body in a thickness direction of the cover body; A pole, the pole being inserted into the mounting hole; A riveting block, the riveting block is located at one side of the cover body in the thickness direction and is sleeved and fixed on the pole; An upper insulating member, the upper insulating member includes a first insulating segment, a second insulating segment and a third insulating segment, the first insulating segment is sleeved on the pole and located between the rivet block and the cover body, the second insulating segment is sleeved on the rivet block, one end of the second insulating segment close to the cover body is connected to an end of the first insulating segment away from the center of the pole, the third insulating segment is annular and is located on a side of the rivet block away from the cover body, and one end of the third insulating segment away from the center of the pole is connected to an end of the second insulating segment away from the cover body.

2. The top cover assembly of the battery according to claim 1, characterized in that: An annular groove extending along the circumferential direction of the rivet block is provided on one side of the rivet block away from the cover body, and the side of the annular groove away from the pole is open, and the third insulating section is located in the annular groove.

3. The top cover assembly of the battery according to claim 2, characterized in that: A surface of the third insulating segment facing away from the cover body is flush with a surface of the rivet block facing away from the cover body.

4. The top cover assembly of the battery according to claim 2, characterized in that: Along the thickness direction of the cover body, the depth of the annular groove is 0.5mm-1.5mm.

5. The top cover assembly of the battery according to claim 2, characterized in that: Along the radial direction of the pole, the distance between one end of the third insulating segment close to the pole and the inner circumferential wall of the second insulating segment is 0.5 mm-1.5 mm.

6. The top cover assembly of the battery according to claim 1, characterized in that: A plurality of spaced-apart protrusions are provided on one side of the first insulating section facing the riveting block, and a groove cooperating with the protrusions is provided on the riveting block.

7. The top cover assembly of the battery according to claim 6, characterized in that: The first insulating section has a plurality of through holes, the plurality of through holes correspond to the plurality of protrusions one by one, and the plurality of through holes penetrate the plurality of protrusions respectively.

8. The top cover assembly of the battery according to claim 1, characterized in that: The pole is provided with a connecting portion, and the connecting portion is located on a side of the cover body away from the riveting block. The top cover assembly of the battery also includes: A sealing ring, which is sleeved on the pole and at least partially located between the inner peripheral wall of the mounting hole and the outer peripheral wall of the pole; The lower plastic is located at a side of the cover body away from the riveting block and is at least partially located between the connecting portion and the cover body.

9. The top cover assembly of the battery according to claim 8, characterized in that: The sealing ring comprises a first sealing section and a second sealing section, wherein the first sealing section is at least partially located between the inner peripheral wall of the mounting hole and the outer peripheral wall of the pole, and the second sealing section is connected to the first sealing section and is at least partially located between the connecting portion and a surface of the cover body facing away from the riveting block; And / or, a side of the lower plastic facing away from the cover body is provided with an annular limiting portion, and the annular limiting portion is sleeved outside the connecting portion.

10. A battery cell, characterized in that: A top cover assembly comprising a battery according to any one of claims 1-9.

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