Pole, top cover assembly, battery monomer and mold core

Abstract

The utility model discloses a pole column, a top cover assembly of a battery, a battery monomer and a mold core. The pole column comprises a connecting column and a connecting plate, the pole is used for the top cover assembly of the battery, the top cover assembly comprises a cover body, a mounting hole penetrating through the cover body in the thickness direction of the cover body is formed in the cover body, and a connecting column is suitable for being arranged in the mounting hole in a penetrating manner; the connecting plate is located on one side of the cover body in the thickness direction and connected with the connecting column, and positioning notches are formed in the two sides of the connecting plate in the width direction of the cover body. According to the pole disclosed by the utility model, the pole can be positioned and limited in the width direction of the cover body through the positioning notch, so that the assembling efficiency, the assembling precision and the stability of the cover plate assembly of the battery are improved.

Description

Technical Field

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

[0002] In the related art, lithium-ion batteries are 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 close the top of the battery. The pole is one of the key components in the top cover assembly of the battery, which is used to connect the pole ears and external circuits of the battery. In the assembly process of the top cover assembly of the existing battery, the pole must first be installed in the fixing groove of the mold core, and then the sealing ring, lower plastic, plain aluminum plate, upper plastic, rivet block and other components are installed for riveting and fixing. However, when the pole is installed in the fixing groove of the mold core, there is a lack of accurate positioning mechanism in the width direction, which reduces the assembly efficiency. At the same time, it also causes the symmetry of the pole after riveting to be poor, which seriously affects the assembly accuracy of the subsequent process, and greatly reduces the reliability and stability of the battery cover assembly and the performance and quality 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 provides a pole, which can be positioned and limited in the width direction of the cover body through a positioning notch, thereby improving the assembly efficiency, assembly accuracy and stability of the battery cover assembly.

[0004] The utility model also provides a top cover assembly of a battery, and the top cover assembly of the battery comprises the above-mentioned pole.

[0005] The utility model also provides a battery cell, which includes the battery top cover assembly mentioned above.

[0006] The utility model also provides a mold core, which is used to assemble the top cover assembly of the battery.

[0007] The pole according to the embodiment of the utility model comprises: a connecting pole and a connecting plate. The pole is used for the top cover assembly of the battery, and the top cover assembly comprises a cover body, and the cover body is provided with a mounting hole penetrating the cover body in the thickness direction of the cover body, and the connecting pole is suitable for being penetrated in the mounting hole; the connecting plate is located on one side of the cover body in the thickness direction and connected to the connecting pole, and the connecting plate has positioning notches on both sides along the width direction of the cover body.

[0008] According to the pole of the embodiment of the utility model, by providing positioning notches on both sides of the connecting plate of the pole along the width direction of the cover body of the top cover assembly, and providing positioning protrusions that match the positioning notches on both sides of the receiving groove of the mold core along the width direction of the cover body, the connecting plate can be effectively positioned and limited in the width direction and length direction of the cover body during the assembly process of the top cover assembly of the battery, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly of the battery. On the other hand, it can also prevent the position of the pole and the cover body from being offset, improve the symmetry and assembly accuracy of the pole in the cover plate assembly of the battery, thereby improving the reliability and stability of the cover plate assembly of the battery, and helping to optimize the performance and quality of the battery.

[0009] According to some embodiments of the present invention, the two positioning notches are respectively located at two ends of the connecting plate along the length direction of the cover body.

[0010] According to some embodiments of the present invention, the two positioning notches are respectively located at two corners of the connecting plate.

[0011] In some embodiments of the present invention, the inner wall of the positioning notch is a plane.

[0012] In some embodiments of the present invention, the length of the positioning notch along the length direction of the cover body is 1.5-4.5 mm; and / or the width of the positioning notch along the width direction of the cover body is 1-2 mm.

[0013] The top cover assembly of the battery according to the embodiment of the utility model comprises: a cover body and the above-mentioned pole. The cover body has a mounting hole penetrating the cover body along the thickness direction of the cover body; the connecting pole is inserted into the mounting hole.

[0014] According to the battery top cover assembly of the embodiment of the utility model, by providing positioning notches on both sides of the connecting plate of the pole along the width direction of the cover body of the top cover assembly, and providing positioning protrusions that match the positioning notches on both sides of the receiving groove of the mold core along the width direction of the cover body, the connecting plate can be effectively positioned and limited in the width direction and length direction of the cover body during the assembly process of the battery top cover assembly, thereby improving the assembly accuracy and assembly efficiency of the battery top cover assembly. On the other hand, it can also prevent the position of the pole and the cover body from being offset, improve the symmetry and assembly accuracy of the pole in the battery cover assembly, thereby improving the reliability and stability of the battery cover assembly, and helping to optimize the performance and quality of the battery.

[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 providing positioning notches on both sides of the connecting plate of the pole along the width direction of the cover body of the top cover assembly, and providing positioning protrusions that match the positioning notches on both sides of the receiving groove of the mold core along the width direction of the cover body, the connecting plate can be effectively positioned and limited in the width direction and length direction of the cover body during the assembly process of the top cover assembly of the battery, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly of the battery. On the other hand, it can also prevent the position of the pole and the cover body from being offset, improve the symmetry and assembly accuracy of the pole in the cover plate assembly of the battery, improve the reliability and stability of the cover plate assembly of the battery, and further improve the reliability and stability of the battery cell, and help optimize the performance and quality of the battery cell.

[0017] The mold core according to the embodiment of the utility model comprises: a plate body. The mold core is used to assemble the top cover assembly of the battery, and a receiving groove for receiving the connecting plate is provided on one side of the plate body in the thickness direction, and the receiving groove is open on both sides along the width direction of the cover body, and positioning protrusions are provided on both sides of the receiving groove along the width direction of the cover body to match the positioning notch.

[0018] According to the mold core of the embodiment of the utility model, by using the mold core provided with a receiving groove for accommodating the connecting plate to assemble the top cover assembly of the battery, it is convenient to assemble the top cover assembly of the battery. By providing positioning notches on both sides of the connecting plate of the pole along the width direction of the cover body of the top cover assembly, and providing positioning protrusions that cooperate with the positioning notches on both sides of the receiving groove along the width direction of the cover body, the accurate positioning and limiting of the connecting plate can be ensured, making the assembly of the top cover assembly of the battery simpler and more convenient, and improving the assembly accuracy and assembly efficiency of the top cover assembly of the battery. In addition, the positioning protrusion can ensure that the pole is in the correct position during the assembly process, prevent the position of the pole and the cover body from being offset, improve the symmetry and assembly accuracy of the pole in the cover assembly of the battery, and thus improve the reliability and stability of the cover assembly of the battery.

[0019] In some embodiments of the present invention, when the two positioning notches are respectively located at the two ends of the connecting plate along the length direction of the cover body, the two positioning protrusions are respectively located at the two ends of the accommodating groove along the length direction of the cover body; and / or, when the two positioning notches are respectively located at the two corners of the connecting plate, the two positioning protrusions are respectively located at the two corners of the accommodating groove.

[0020] In some embodiments of the present invention, the depth of the accommodating groove is A, the thickness of the mold core is B, and satisfies: 1 / 3≤A / B≤1 / 2; and / or, there are two mounting holes, two corresponding poles, and two corresponding accommodating grooves; and / or, the mold core is an integral part.

[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 an exploded view of a top cover assembly of a battery according to an embodiment of the utility model;

[0024] Figure 2 is a stereogram of a pole according to an embodiment of the utility model;

[0025] Figure 3 is a three-dimensional diagram of a mold core according to an embodiment of the utility model;

[0026] Figure 4 It is an exploded view of a battery cell according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] 100. Top cover assembly;

[0029] 1. Cover body; 110. Mounting hole;

[0030] 200, pole;

[0031] 2. Connecting column;

[0032] 3. Connecting plate; 31. Positioning notch;

[0033] 4. Riveting block; 41. First through hole;

[0034] 5. Apply plastic; 51. Second through hole;

[0035] 6. Remove plastic;

[0036] 7. Sealing ring;

[0037] 8. Liquid injection hole;

[0038] 9. Explosion-proof valve;

[0039] 10. Explosion-proof valve patch

[0040] 300, battery cell;

[0041] 11. Earpiece;

[0042] 12. Top cover patch;

[0043] 400, mold core;

[0044] 13. Plate body; 131. Accommodating groove; 132. Positioning protrusion. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Reference below Figure 1-Figure 4 A pole 200 according to an embodiment of the present invention is described.

[0049] like Figure 2 As shown, the pole 200 according to the embodiment of the utility model includes a connecting pole 2 and a connecting plate 3 .

[0050] Specifically, Figure 1 and Figure 2As shown, the pole 200 is used for the top cover assembly 100 of the battery, and the top cover assembly 100 includes a cover body 1, and the cover body 1 is provided with a mounting hole 110 which penetrates the cover body 1 in the thickness direction of the cover body 1. The connecting column 2 is suitable for being inserted into the mounting hole 110, and the connecting plate 3 is located on one side of the thickness direction of the cover body 1 and is connected to the connecting column 2. The existence of the connecting plate 3 can play a limiting role to prevent the pole 200 from escaping from the cover body 1, thereby ensuring the stability and reliability of the top cover assembly 100 of the battery.

[0051] like Figure 1 In the example shown, the top cover assembly 100 of the battery also includes a rivet block 4, an upper plastic 5, a lower plastic 6 and a sealing ring 7. The rivet block 4 is located on the side away from the connecting plate 3 in the thickness direction of the cover body 1 and is sleeved and fixed on the pole 200. The rivet block 4 has a first through hole 41 that penetrates the rivet block 4 in the thickness direction of the rivet block 4, so that the pole 200 passes through the first through hole 41 and is assembled and fixed with the rivet block 4 by means such as laser welding. The upper plastic 5 is sleeved on the pole 200 and is located between the rivet block 4 and the cover body 1, which can prevent the cover body 1 from directly contacting the rivet block 4 and avoid the cover body 1 and the pole 200 from being connected and conducting and causing a short circuit. The upper plastic 5 has a second through hole 51 that penetrates the upper plastic 5 in the thickness direction of the upper plastic 5, so that the pole 200 passes through the upper plastic 5.

[0052] Furthermore, the sealing ring 7 is sleeved on the pole 200 and is at least partially located between the inner peripheral wall of the mounting hole 110 and the outer peripheral wall of the pole 200, which can play an insulating role to prevent the cover body 1 from directly contacting the pole 200 and conducting electricity to cause a short circuit. At the same time, the sealing ring 7 can also form an effective seal between the mounting hole 110 and the pole 200 to prevent the electrolyte and other materials inside the battery from leaking through the mounting hole 110. In addition, the lower plastic 6 is located on the side of the cover body 1 away from the riveting block 4 and is at least partially located between the connecting plate 3 and the cover body 1. The lower plastic 6 can play an insulating role to prevent the cover body 1 from directly contacting the connecting plate 3 of the pole 200 and conducting electricity to cause a short circuit, reduce the risk of leakage, and thus improve the safety and stability of the battery.

[0053] In addition, the top cover assembly 100 of the battery also includes a liquid injection hole 8, an explosion-proof valve 9 and an explosion-proof valve patch 10. The liquid injection hole 8 is on the cover body 1 and is used to inject liquid such as electrolyte into the battery. When the internal pressure of the battery is too high due to the generation of high-temperature and high-pressure gas during use, the explosion-proof valve 9 will automatically open to release the pressure to prevent the battery from exploding. The explosion-proof valve patch 10 is set on the upper surface of the explosion-proof valve 9 to protect the explosion-proof valve 9 to prevent the explosion-proof valve 9 from being accidentally damaged by foreign objects.

[0054] Among them, Figure 2As shown, the connection plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1, and the top cover assembly 100 of the battery is assembled through the mold core 400. The mold core 400 includes a plate body 13, and one side of the plate body 13 in the thickness direction is provided with a receiving groove 131 for accommodating the connection plate 3. The length of the receiving groove 131 along the length direction of the cover body 1 can match the length of the connection plate 3 along the length direction of the cover body 1. During the assembly process, the connection plate 3 can be effectively positioned and limited in the length direction of the cover body 1. For example, in the specific assembly process of the top cover assembly 100 of the battery, the assembler can first put the connection plate 3 of the pole 200 into the receiving groove 131 for positioning and limiting, and then sequentially install the sealing ring 7, the lower plastic 6, the plate body 13, the upper plastic 5 and the riveting block 4 for riveting and fixing. The mold core 400 can facilitate the assembly of the top cover assembly 100 of the battery and improve the assembly efficiency of the top cover assembly 100 of the battery.

[0055] Among them, the accommodating groove 131 is open on both sides along the width direction of the cover body 1, and the connecting plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1. The accommodating groove 131 is provided with positioning protrusions 132 that cooperate with the positioning notches 31 on both sides along the width direction of the cover body 1. Through the cooperation between the positioning notches 31 and the positioning protrusions 132, the accurate positioning and limiting of the connecting plate 3 in the width direction of the cover body 1 can be ensured, making the assembly of the battery top cover assembly 100 simpler and more convenient, and improving the assembly accuracy and assembly efficiency of the battery top cover assembly 100.

[0056] On the other hand, through the cooperation of the positioning notch 31 of the connecting plate 3 and the positioning protrusion 132 of the mold core 400, the position of the pole 200 and the cover body 1 can be prevented from being offset during the assembly process, ensuring that the pole 200 is in the correct position during the assembly process, greatly improving the symmetry of the pole 200 after the riveting of the battery cover assembly, ensuring the stacking accuracy of the components of the battery cover assembly, improving the reliability and stability of the battery cover assembly, and thus helping to optimize the performance and quality of the battery.

[0057] According to the pole 200 of the embodiment of the utility model, by providing positioning notches 31 on both sides of the connecting plate 3 of the pole 200 along the width direction of the cover body 1 of the top cover assembly 100, and providing positioning protrusions 132 that cooperate with the positioning notches 31 on both sides of the receiving groove 131 of the mold core 400 along the width direction of the cover body 1, the connecting plate 3 can be effectively positioned and limited in the width direction and length direction of the cover body 1 during the assembly process of the top cover assembly 100 of the battery, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery. On the other hand, it can also prevent the position of the pole 200 and the cover body 1 from being offset, improve the symmetry and assembly accuracy of the pole 200 in the cover assembly of the battery, and thus improve the reliability and stability of the cover assembly of the battery, and help optimize the performance and quality of the battery.

[0058] In some embodiments of the present invention, Figure 2 As shown, the two positioning notches 31 are respectively located at the two ends of the connecting plate 3 along the length direction of the cover body 1, which can provide accurate positioning and limiting functions in the length direction of the cover body 1, and prevent the position of the pole 200 and the cover body 1 from being offset during the assembly process of the top cover assembly 100 of the battery, which is beneficial to improving the symmetry and assembly accuracy of the pole 200 in the cover assembly of the battery, thereby improving the reliability and stability of the cover assembly of the battery.

[0059] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the connecting plate 3 can be a plate-like structure with a roughly rectangular outline, which is conducive to matching and assembling with the cover body 1 of the top cover assembly 100 of the battery, and is also convenient for processing and manufacturing. Among them, the two positioning notches 31 are respectively located at the two corners of the connecting plate 3, which can provide accurate positioning and limiting functions in the length direction and width direction of the cover body 1, and prevent the position of the pole 200 and the cover body 1 from being offset during the assembly process of the top cover assembly 100 of the battery, which is conducive to improving the symmetry and assembly accuracy of the pole 200 in the battery cover assembly, thereby improving the reliability and stability of the battery cover assembly. At the same time, it is also convenient for processing and manufacturing, which can reduce the difficulty of producing and processing the connecting plate 3, and thereby reduce the production cost of the pole 200.

[0060] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the inner wall of the positioning notch 31 is a plane, which can provide a better support area and contact surface, and is convenient for effectively positioning and limiting the connection plate 3 through the inner wall of the positioning notch 31. On the other hand, the plane structure is simple and easy to manufacture, which can reduce the difficulty of manufacturing the connection plate 3, and further reduce the production cost of the pole 200.

[0061] In some embodiments of the present invention, Figure 2 As shown, the length of the positioning notch 31 along the length direction of the cover body 1 is 1.5-4.5mm. If the length of the positioning notch 31 along the length direction of the cover body 1 is less than 1.5mm, the size of the positioning notch 31 is too small, which greatly reduces the positioning and limiting effect of the positioning notch 31; if the length of the positioning notch 31 along the length direction of the cover body 1 is greater than 4.5mm, the size of the positioning notch 31 is too large, the size of the connecting plate 3 connected to the cover body 1 is too small, and the welding area between the connecting plate 3 and the pole lug 11 is too small, which is not conducive to the connection stability of the battery cover assembly, and also cannot meet the area requirements for the welding connection between the connecting plate 3 and the pole lug 11. Limiting the length of the positioning notch 31 along the length direction of the cover body 1 to 1.5-4.5mm can not only meet the positioning and limiting requirements of the positioning notch 31, but also ensure the connection area between the connecting plate 3 and the cover body 1 and the welding area between the connecting plate 3 and the pole lug 11, thereby ensuring the connection stability of the battery cover assembly and ensuring the performance of the battery.

[0062] In some embodiments of the present invention, Figure 2 As shown, the width of the positioning notch 31 along the width direction of the cover body 1 is 1-2mm. If the length of the positioning notch 31 along the width direction of the cover body 1 is less than 1mm, the size of the positioning notch 31 is too small, which greatly reduces the positioning and limiting effect of the positioning notch 31; if the length of the positioning notch 31 along the width direction of the cover body 1 is greater than 2mm, the size of the positioning notch 31 is too large, the size of the connecting plate 3 connected to the cover body 1 is too small, and the welding area between the connecting plate 3 and the pole lug 11 is too small, which is not conducive to the connection stability of the battery cover assembly, and also cannot meet the area requirements for the welding connection between the connecting plate 3 and the pole lug 11. Limiting the length of the positioning notch 31 along the width direction of the cover body 1 to 1-2mm can not only meet the positioning and limiting requirements of the positioning notch 31, but also ensure the connection area between the connecting plate 3 and the cover body 1 and the welding area between the connecting plate 3 and the pole lug 11, thereby ensuring the connection stability of the battery cover assembly and ensuring the performance of the battery.

[0063] The top cover assembly 100 of a battery according to an embodiment of the present invention is described below.

[0064] The top cover assembly 100 of the battery according to the embodiment of the utility model comprises: a cover body 1 and the above-mentioned pole 200 .

[0065] Specifically, Figure 1 and Figure 2As shown, the cover body 1 has a mounting hole 110 which passes through the cover body 1 along the thickness direction of the cover body 1, and the pole 200 includes a connecting column 2 and a connecting plate 3. The connecting column 2 is passed through the mounting hole 110, and the connecting plate 3 is located on one side of the thickness direction of the cover body 1 and is connected to the connecting column 2. The existence of the connecting plate 3 can play a limiting role to prevent the pole 200 from escaping from the cover body 1, thereby ensuring the stability and reliability of the battery top cover assembly 100.

[0066] like Figure 1 In the example shown, the top cover assembly 100 of the battery also includes a rivet block 4, an upper plastic 5, a lower plastic 6 and a sealing ring 7. The rivet block 4 is located on the side away from the connecting plate 3 in the thickness direction of the cover body 1 and is sleeved and fixed on the pole 200. The rivet block 4 has a first through hole 41 that penetrates the rivet block 4 in the thickness direction of the rivet block 4, so that the pole 200 passes through the first through hole 41 and is assembled and fixed with the rivet block 4 by means such as laser welding. The upper plastic 5 is sleeved on the pole 200 and is located between the rivet block 4 and the cover body 1, which can prevent the cover body 1 from directly contacting the rivet block 4 and avoid the cover body 1 and the pole 200 from being connected and conducting and causing a short circuit. The upper plastic 5 has a second through hole 51 that penetrates the upper plastic 5 in the thickness direction of the upper plastic 5, so that the pole 200 passes through the upper plastic 5.

[0067] Furthermore, the sealing ring 7 is sleeved on the pole 200 and is at least partially located between the inner peripheral wall of the mounting hole 110 and the outer peripheral wall of the pole 200, which can play an insulating role to prevent the cover body 1 from directly contacting the pole 200 and conducting electricity to cause a short circuit. At the same time, the sealing ring 7 can also form an effective seal between the mounting hole 110 and the pole 200 to prevent the electrolyte and other materials inside the battery from leaking through the mounting hole 110. In addition, the lower plastic 6 is located on the side of the cover body 1 away from the riveting block 4 and is at least partially located between the connecting plate 3 and the cover body 1. The lower plastic 6 can play an insulating role to prevent the cover body 1 from directly contacting the connecting plate 3 of the pole 200 and conducting electricity to cause a short circuit, reduce the risk of leakage, and thus improve the safety and stability of the battery.

[0068] In addition, the top cover assembly 100 of the battery also includes a liquid injection hole 8, an explosion-proof valve 9 and an explosion-proof valve patch 10. The liquid injection hole 8 is on the cover body 1 and is used to inject liquid such as electrolyte into the battery. When the internal pressure of the battery is too high due to the generation of high-temperature and high-pressure gas during use, the explosion-proof valve 9 will automatically open to release the pressure to prevent the battery from exploding. The explosion-proof valve patch 10 is set on the upper surface of the explosion-proof valve 9 to protect the explosion-proof valve 9 to prevent the explosion-proof valve 9 from being accidentally damaged by foreign objects.

[0069] Among them, Figure 2As shown, the connection plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1, and the top cover assembly 100 of the battery is assembled through the mold core 400. The structure of the mold core 400 is that the mold core 400 includes a plate body 13, and one side of the plate body 13 in the thickness direction is provided with a receiving groove 131 for accommodating the connection plate 3. The length of the receiving groove 131 along the length direction of the cover body 1 can match the length of the connection plate 3 along the length direction of the cover body 1. During the assembly process, the connection plate 3 can be effectively positioned and limited in the length direction of the cover body 1. For example, in the specific assembly process of the top cover assembly 100 of the battery, the assembler can first put the connection plate 3 of the pole 200 into the receiving groove 131 for positioning and limiting, and then sequentially install the sealing ring 7, the lower plastic 6, the plate body 13, the upper plastic 5 and the riveting block 4 for riveting and fixing. The mold core 400 can facilitate the assembly of the top cover assembly 100 of the battery and improve the assembly efficiency of the top cover assembly 100 of the battery.

[0070] Among them, the accommodating groove 131 is open on both sides along the width direction of the cover body 1, and the connecting plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1. The accommodating groove 131 is provided with positioning protrusions 132 that cooperate with the positioning notches 31 on both sides along the width direction of the cover body 1. Through the cooperation between the positioning notches 31 and the positioning protrusions 132, the accurate positioning and limiting of the connecting plate 3 in the width direction of the cover body 1 can be ensured, making the assembly of the battery top cover assembly 100 simpler and more convenient, and improving the assembly accuracy and assembly efficiency of the battery top cover assembly 100.

[0071] On the other hand, through the cooperation of the positioning notch 31 of the connecting plate 3 and the positioning protrusion 132 of the mold core 400, the position of the pole 200 and the cover body 1 can be prevented from being offset, ensuring that the pole 200 is in the correct position during the assembly process, greatly improving the symmetry of the pole 200 after the battery cover assembly is assembled and riveted, and can ensure the stacking accuracy of the components of the battery cover assembly, improve the reliability and stability of the battery cover assembly, and thus help optimize the performance and quality of the battery.

[0072] According to the top cover assembly 100 of the battery of the embodiment of the utility model, by providing positioning notches 31 on both sides of the connecting plate 3 of the pole 200 along the width direction of the cover body 1 of the top cover assembly 100, and providing positioning protrusions 132 that cooperate with the positioning notches 31 on both sides of the receiving groove 131 of the mold core 400 along the width direction of the cover body 1, the connecting plate 3 can be effectively positioned and limited in the width direction and length direction of the cover body 1 during the assembly process of the top cover assembly 100 of the battery, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery. On the other hand, it can also prevent the pole 200 from being offset from the cover body 1, improve the symmetry and assembly accuracy of the pole 200 in the cover assembly of the battery, thereby improving the reliability and stability of the cover assembly of the battery, and helping to optimize the performance and quality of the battery.

[0073] The battery cell 300 according to the embodiment of the present invention is described below.

[0074] The battery cell 300 according to the embodiment of the present invention includes: the battery top cover assembly 100 mentioned above.

[0075] Specifically, Figure 4 As shown, combined Figure 1 and Figure 2 The battery cell 300 also includes a top cover patch 12, which can play an insulating and protective role to prevent the top cover assembly 100 from short-circuiting with external circuits. The top cover assembly 100 of the battery includes a cover body 1 and a pole 200. The cover body 1 has a mounting hole 110 that penetrates the cover body 1 along the thickness direction of the cover body 1. The pole 200 includes a connecting column 2 and a connecting plate 3. The connecting column 2 is inserted into the mounting hole 110. The connecting plate 3 is located on one side of the cover body 1 in the thickness direction and is connected to the connecting column 2. The existence of the connecting plate 3 can play a limiting role to prevent the pole 200 from falling off the cover body 1, which can ensure the stability and reliability of the top cover assembly 100 of the battery.

[0076] like Figure 1 In the example shown, the top cover assembly 100 of the battery also includes a rivet block 4, an upper plastic 5, a lower plastic 6 and a sealing ring 7. The rivet block 4 is located on the side away from the connecting plate 3 in the thickness direction of the cover body 1 and is sleeved and fixed on the pole 200. The rivet block 4 has a first through hole 41 that penetrates the rivet block 4 in the thickness direction of the rivet block 4, so that the pole 200 passes through the first through hole 41 and is assembled and fixed with the rivet block 4 by means such as laser welding. The upper plastic 5 is sleeved on the pole 200 and is located between the rivet block 4 and the cover body 1, which can prevent the cover body 1 from directly contacting the rivet block 4 and avoid the cover body 1 and the pole 200 from being connected and conducting and causing a short circuit. The upper plastic 5 has a second through hole 51 that penetrates the upper plastic 5 in the thickness direction of the upper plastic 5, so that the pole 200 passes through the upper plastic 5.

[0077] Furthermore, the sealing ring 7 is sleeved on the pole 200 and is at least partially located between the inner peripheral wall of the mounting hole 110 and the outer peripheral wall of the pole 200, which can play an insulating role to prevent the cover body 1 from directly contacting the pole 200 and conducting electricity to cause a short circuit. At the same time, the sealing ring 7 can also form an effective seal between the mounting hole 110 and the pole 200 to prevent the electrolyte and other materials inside the battery from leaking through the mounting hole 110. In addition, the lower plastic 6 is located on the side of the cover body 1 away from the riveting block 4 and is at least partially located between the connecting plate 3 and the cover body 1. The lower plastic 6 can play an insulating role to prevent the cover body 1 from directly contacting the connecting plate 3 of the pole 200 and conducting electricity to cause a short circuit, reduce the risk of leakage, and thus improve the safety and stability of the battery.

[0078] In addition, the top cover assembly 100 of the battery also includes a liquid injection hole 8, an explosion-proof valve 9 and an explosion-proof valve patch 10. The liquid injection hole 8 is on the cover body 1 and is used to inject liquid such as electrolyte into the battery. When the internal pressure of the battery is too high due to the generation of high-temperature and high-pressure gas during use, the explosion-proof valve 9 will automatically open to release the pressure to prevent the battery from exploding. The explosion-proof valve patch 10 is set on the upper surface of the explosion-proof valve 9 to protect the explosion-proof valve 9 to prevent the explosion-proof valve 9 from being accidentally damaged by foreign objects.

[0079] Among them, the connection plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1, and the top cover assembly 100 of the battery is assembled through the mold core 400. The mold core 400 includes a plate body 13, and one side of the plate body 13 in the thickness direction is provided with a receiving groove 131 for accommodating the connection plate 3. The length of the receiving groove 131 along the length direction of the cover body 1 can match the length of the connection plate 3 along the length direction of the cover body 1. During the assembly process, the connection plate 3 can be effectively positioned and limited in the length direction of the cover body 1. For example, in the specific assembly process of the top cover assembly 100 of the battery, the assembler can first put the connection plate 3 of the pole 200 into the receiving groove 131 for positioning and limiting, and then sequentially install the sealing ring 7, the lower plastic 6, the plate body 13, the upper plastic 5 and the riveting block 4 for riveting and fixing. The mold core 400 can facilitate the assembly of the top cover assembly 100 of the battery and improve the assembly efficiency of the top cover assembly 100 of the battery.

[0080] Among them, the accommodating groove 131 is open on both sides along the width direction of the cover body 1, and the connecting plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1. The accommodating groove 131 is provided with positioning protrusions 132 that cooperate with the positioning notches 31 on both sides along the width direction of the cover body 1. Through the cooperation between the positioning notches 31 and the positioning protrusions 132, the accurate positioning and limiting of the connecting plate 3 in the width direction of the cover body 1 can be ensured, making the assembly of the battery top cover assembly 100 simpler and more convenient, improving the assembly accuracy and assembly efficiency of the battery top cover assembly 100, and thereby improving the assembly efficiency of the battery cell 300.

[0081] On the other hand, through the cooperation of the positioning notch 31 of the connecting plate 3 and the positioning protrusion 132 of the mold core 400, the position of the pole 200 and the cover body 1 can be prevented from being offset, ensuring that the pole 200 is in the correct position during the assembly process, greatly improving the symmetry of the pole 200 after the battery cover assembly is assembled and riveted, and can ensure the stacking accuracy of the components of the battery cover assembly, improve the reliability and stability of the battery cover assembly, and thus help optimize the performance and quality of the battery cell 300.

[0082] According to the battery cell 300 of the embodiment of the utility model, by providing positioning notches 31 on both sides of the connection plate 3 of the pole 200 along the width direction of the cover body 1 of the top cover assembly 100, and providing positioning protrusions 132 that cooperate with the positioning notches 31 on both sides of the receiving groove 131 of the mold core 400 along the width direction of the cover body 1, the connection plate 3 can be effectively positioned and limited in the width direction and length direction of the cover body 1 during the assembly process of the top cover assembly 100 of the battery, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery. On the other hand, it can also prevent the position of the pole 200 and the cover body 1 from being offset, improve the symmetry and assembly accuracy of the pole 200 in the cover assembly of the battery, improve the reliability and stability of the cover assembly of the battery, and further improve the reliability and stability of the battery cell 300, and help optimize the performance and quality of the battery cell 300.

[0083] The mold core 400 according to an embodiment of the present invention is described below.

[0084] The mold core 400 according to the embodiment of the present utility model includes a plate body 13 .

[0085] Specifically, Figure 3As shown, the mold core 400 is used to assemble the top cover assembly 100 of the battery. A receiving groove 131 for receiving the connecting plate 3 is provided on one side of the plate body 13 in the thickness direction. The length of the receiving groove 131 along the length direction of the cover body 1 can match the length of the connecting plate 3 along the length direction of the cover body 1. During the assembly process, the connecting plate 3 can be effectively positioned and limited in the length direction of the cover body 1. For example, in the specific assembly process of the top cover assembly 100 of the battery, the assembler can first place the connecting plate 3 of the pole 200 into the receiving groove 131 for positioning and limiting, and then sequentially install the sealing ring 7, the lower plastic 6, the plate body 13, the upper plastic 5 and the riveting block 4 for riveting and fixing. The mold core 400 can facilitate the assembly of the top cover assembly 100 of the battery and improve the assembly efficiency of the top cover assembly 100 of the battery. The receiving groove 131 is open on both sides along the width direction of the cover body 1, which is convenient for processing and manufacturing, and can reduce the production cost of the mold core 400.

[0086] Among them, the connecting plate 3 has positioning notches 31 on both sides along the width direction of the cover body 1, and the accommodating groove 131 has positioning protrusions 132 that cooperate with the positioning notches 31 on both sides along the width direction of the cover body 1, which can ensure the accurate positioning and limiting of the connecting plate 3 in the width direction of the cover body 1, making the assembly of the battery top cover assembly 100 simpler and more convenient, and improving the assembly accuracy and assembly efficiency of the battery top cover assembly 100.

[0087] On the other hand, through the cooperation of the positioning notch 31 of the connecting plate 3 and the positioning protrusion 132 of the mold core 400, it is also possible to ensure that the pole 200 is in the correct position during the assembly process, prevent the position of the pole 200 and the cover body 1 from being offset, and improve the symmetry and assembly accuracy of the pole 200 in the battery cover assembly, thereby improving the reliability and stability of the battery cover assembly, which helps to optimize the performance and quality of the battery.

[0088] According to the mold core 400 of the embodiment of the utility model, by using the mold core 400 provided with the receiving groove 131 for accommodating the connecting plate 3 to assemble the top cover assembly 100 of the battery, it is convenient to assemble the top cover assembly 100 of the battery. By providing the positioning notches 31 on both sides of the connecting plate 3 of the pole 200 along the width direction of the cover body 1 of the top cover assembly 100, and providing the positioning protrusions 132 that cooperate with the positioning notches 31 on both sides of the receiving groove 131 along the width direction of the cover body 1, the accurate positioning and limiting of the connecting plate 3 can be ensured, so that the assembly of the top cover assembly 100 of the battery is simpler and more convenient, and the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery are improved. In addition, the positioning protrusion 132 can ensure that the pole 200 is in the correct position during the assembly process, prevent the pole 200 from being offset from the position of the cover body 1, improve the symmetry and assembly accuracy of the pole 200 in the cover assembly of the battery, and thus improve the reliability and stability of the cover assembly of the battery.

[0089] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, when the two positioning notches 31 are respectively located at the two ends of the connecting plate 3 along the length direction of the cover body 1, the two positioning protrusions 132 are located at the two ends of the accommodating groove 131 along the length direction of the cover body 1; the position of the positioning protrusion 132 corresponds to the position of the positioning notch 31, which facilitates the positioning protrusion 132 of the mold core 400 and the positioning notch 31 of the connecting plate 3 to cooperate with each other, which can ensure the positioning and limiting effect of the mold core 400 on the connecting plate 3, thereby improving the assembly accuracy and assembly efficiency of the battery top cover assembly 100.

[0090] In this application, if Figure 2 and Figure 3 As shown, when the two positioning notches 31 are respectively located at the two corners of the connecting plate 3, the two positioning protrusions 132 are respectively located at the two corners of the receiving groove 131. The positioning protrusions 132 arranged at the corners correspond to the positions of the positioning notches 31, so that the positioning protrusions 132 of the mold core 400 and the positioning notches 31 of the connecting plate 3 can cooperate with each other, which can ensure the positioning and limiting effect of the mold core 400 on the connecting plate 3, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery. Among them, the connecting plate 3 can be a rectangular plate-like structure, and the receiving groove 131 can be a rectangular groove. The rectangular groove is conducive to the cooperation with the connecting plate 3 of the rectangular plate-like structure, and it is also convenient for processing and manufacturing, which can reduce the cost of production and processing.

[0091] In some embodiments of the present invention, Figure 3 As shown, the depth of the receiving groove 131 is A, the thickness of the mold core 400 is B, and they meet: 1 / 3≤A / B≤1 / 2; if A / B≤1 / 3, the depth of the fixing groove is too shallow, affecting the positioning and limiting effect of the fixing groove on the connecting plate 3; if A / B≥1 / 2, the depth of the fixing groove is too deep, which will interfere with the subsequent assembly of the cover body 1 of the battery cover assembly. 1 / 3≤A / B≤1 / 2 can not only ensure the positioning and limiting effect of the fixing groove on the connecting plate 3, but also avoid interference with the subsequent assembly of the cover body 1 of the battery cover assembly.

[0092] In the present application, there are two mounting holes 110, two corresponding poles 200, and two corresponding receiving grooves 131. The poles 200 can be a positive pole and a negative pole respectively, and the two poles 200 are connected to two rivet blocks 4 respectively, the positive pole is connected to the positive pole ear 11, and the negative pole is connected to the negative pole ear 11. The positive pole and the negative pole are respectively inserted into the two mounting holes 110 and extend through the mounting holes 110 through the cover body 1, so as to be connected to the poles 200 of other batteries or external circuits to form a circuit. The two receiving grooves 131 can respectively accommodate the positive pole and the negative pole, and can assemble and position the positive pole and the negative pole at the same time, thereby improving the assembly accuracy and assembly efficiency of the top cover assembly 100 of the battery.

[0093] like Figure 1 and Figure 4 In the example shown, the two poles 200 can also be positive poles or negative poles at the same time. The two poles 200 on the same top cover assembly 100 are connected to a rivet block 4. The opposite ends of the battery cell 300 each have a top cover assembly 100. The positive pole ear 11 and the negative pole ear 11 are respectively located at the two ends of the battery cell 300. The two poles 200 on a top cover assembly 100 are connected to the same pole ear 11 to constitute the positive or negative pole of the battery cell 300.

[0094] In this application, if Figure 3 As shown, the mold core 400 is an integrated piece, which simplifies the manufacturing and assembly process of the mold core 400, thereby improving production efficiency and product quality.

[0095] Other components of the battery cell 300 according to the embodiment of the present invention, such as the tab 11 , the positive electrode column and the negative electrode column, are known to those skilled in the art and will not be described in detail here.

[0096] 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.

[0097] 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 pole, characterized in that: A top cover assembly for a battery, the top cover assembly comprising a cover body, the cover body being provided with a mounting hole penetrating the cover body in a thickness direction of the cover body, the pole comprising: A connecting column, wherein the connecting column is suitable for passing through the mounting hole; A connecting plate is located at one side of the cover body in the thickness direction and is connected to the connecting column. The connecting plate has positioning notches on both sides along the width direction of the cover body.

2. The pole according to claim 1, characterized in that: The two positioning notches are respectively located at two ends of the connecting plate along the length direction of the cover body.

3. The pole according to claim 1, characterized in that: The two positioning notches are respectively located at two corners of the connecting plate.

4. The pole according to claim 3, characterized in that: The inner wall of the positioning notch is a plane.

5. The pole according to claim 3, characterized in that: The length of the positioning notch along the length direction of the cover body is 1.5-4.5 mm; And / or, the width of the positioning notch along the width direction of the cover body is 1-2 mm.

6. A top cover assembly of a battery, characterized in that: include: A cover body, wherein the cover body has a mounting hole penetrating the cover body along a thickness direction of the cover body; According to the pole according to any one of claims 1 to 5, the connecting column is inserted into the mounting hole.

7. A battery cell, characterized in that: A top cover assembly comprising the battery according to claim 6.

8. A mold core, characterized in that: For assembling the top cover assembly of the battery according to claim 6, the mold core comprises: The plate body has a receiving groove for receiving the connecting plate on one side in the thickness direction, the receiving groove is open on both sides along the width direction of the cover body, and the receiving groove has positioning protrusions matching with the positioning notch on both sides along the width direction of the cover body.

9. The mold core according to claim 8, characterized in that: When the two positioning notches are respectively located at two ends of the connecting plate along the length direction of the cover body, the two positioning protrusions are located at two ends of the receiving groove along the length direction of the cover body; And / or, when the two positioning notches are respectively located at two corners of the connecting plate, the two positioning protrusions are respectively located at the two corners of the accommodating groove.

10. The mold core according to claim 8, characterized in that: The depth of the receiving groove is A, the thickness of the mold core is B, and they satisfy: 1 / 3≤A / B≤1 / 2; And / or, there are two mounting holes, two corresponding poles, and two corresponding receiving grooves; and / or, the mold core is an integral part.

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