Cover plate assembly, battery, battery pack and electric equipment

Abstract

The invention discloses a cover plate assembly, a battery, a battery pack and electric equipment, and belongs to the technical field of batteries. The cover plate assembly comprises a cover plate, an insulating part, a positioning assembly and a conducting strip, and the cover plate is provided with a first through hole; the insulating part is arranged in the first through hole in a sealing and penetrating manner; the positioning assembly is mounted in the first through hole through the insulating part, the positioning assembly is provided with a mounting position and forms a second through hole communicated with the mounting position, so that a tab part of a battery cell extends out of the second through hole to the mounting position; and the conducting strip is arranged at the mounting position and is electrically connected with the tab. According to the cover plate assembly, one end, far away from the battery cell, of the pole core penetrates through the second through hole formed in the positioning assembly, extends to the mounting position and is electrically connected with the conducting strip, so that the overall structure of the cover plate assembly is optimized, the performance and reliability of the battery are improved, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a cover assembly, a battery, a battery pack and an electrical device. Background Art

[0002] At present, the power conversion and output of the battery is often achieved through the tab lead-out plates and the poles. However, the internal space utilization, production cost and production efficiency of the battery are affected due to the respective structural shapes and sizes of the poles and the tab lead-out plates. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a cover plate assembly, a battery, a battery pack and an electrical device, which optimizes the overall structure of the cover plate assembly, not only improves the performance and reliability of the battery, but also reduces production costs and improves production efficiency.

[0004] In a first aspect, the present application provides a cover plate assembly, comprising:

[0005] The cover plate is provided with a first through hole;

[0006] An insulating member, sealingly disposed in the first through hole;

[0007] A positioning component, the positioning component is installed in the first through hole through the insulating member, the positioning component has a mounting position and forms a second through hole connected to the mounting position, so that the tab portion of the battery cell extends from the second through hole to the mounting position;

[0008] The conductive sheet is arranged at the installation position and is electrically connected to the tab.

[0009] According to the cover plate assembly of the present application, compared with the related art that requires a pole to be passed through the cover plate and a pole lug lead-out piece to be arranged on the side of the cover plate close to the battery cell to be electrically connected to the pole lug, the positioning assembly is installed in the first through hole of the cover plate through an insulating member, and one end of the pole lug away from the pole core of the battery cell passes through the second through hole and extends to the installation position and is electrically connected to the conductive sheet, thereby reducing the number of required parts, improving the convenience of assembly and reducing the production cost, and making the overall structure of the cover plate assembly as compact as possible to improve the internal space utilization of the battery and improve the electrochemical performance of the battery.

[0010] According to one embodiment of the present application, the outer wall of the insulating part is respectively provided with a first boss and a second boss along the circumferential direction, the first boss is located outside the first through hole and is arranged away from the pole core of the battery cell, the second boss is located outside the first through hole and is arranged close to the pole core, and the sides of the first boss and the second boss close to each other are respectively abutted and cooperated with two sides of the cover plate.

[0011] According to one embodiment of the present application, along the length direction of the cover plate, the length of the first boss is greater than the length of the second boss.

[0012] According to one embodiment of the present application, the insulating member forms a third through hole, and the positioning assembly includes:

[0013] A first positioning member is passed through the third through hole to form the second through hole, and a first notch is provided on a side of the first positioning member away from the pole core of the battery cell, the first notch is connected to the second through hole, and the mounting position includes the first notch.

[0014] According to one embodiment of the present application, a second boss is circumferentially arranged on the outer wall of the insulating member, the second boss is located outside the first through hole and is arranged close to the pole core, and a third boss is circumferentially arranged on the outer wall of the first positioning member, the third boss is located outside the third through hole and is arranged close to the pole core, and the opposite sides of the second boss are respectively abutted and cooperated with the cover plate and the third boss.

[0015] According to one embodiment of the present application, the positioning component further includes:

[0016] The second positioning member is sleeved outside the first positioning member and abuts against the insulating member. The second positioning member is provided with a first recessed groove for accommodating the conductive sheet. The bottom wall of the first recessed groove is provided with a second notch, and the second notch is connected to the first notch. The mounting position also includes the first recessed groove.

[0017] According to an embodiment of the present application, a notch surface of the second positioning member close to the first sink groove and a surface of the conductive sheet away from the pole core are connected by laser welding; or

[0018] The side of the first positioning member away from the pole core, the inner wall of the first sink groove and the side of the conductive sheet close to the pole core are connected by brazing.

[0019] According to an embodiment of the present application, the second notch and the first notch are combined to form a continuous first plane, so that the end of the pole ear away from the pole core is in contact with the first plane.

[0020] According to an embodiment of the present application, the bottom wall of the first sink and the side of the first positioning member away from the pole core are spliced ​​to form a continuous second plane, so that the side of the conductive sheet away from the pole core is connected to the second plane.

[0021] According to one embodiment of the present application, the second positioning member is provided with a fourth through hole and forms a second recessed groove, the notch of the second recessed groove and the notch of the first recessed groove are arranged opposite to each other, the fourth through hole is respectively connected with the first recessed groove and the second recessed groove, the outer wall of the first positioning member is circumferentially provided with a fourth boss, the fourth boss passes through the insulating member and abuts and cooperates with the second recessed groove, and the first positioning member is located on the outer wall portion of the fourth boss away from the pole core and abuts and cooperates with the inner edge of the fourth through hole.

[0022] According to one embodiment of the present application, a first boss is circumferentially arranged on the outer wall of the insulating member, the first boss is located outside the first through hole and away from the pole core of the battery cell, the cover plate forms a groove, the first through hole is located on the bottom wall of the groove, the outer wall of the second positioning member close to the pole core and the outer wall of the first boss are both abutted against the inner wall of the groove, and the side where the second positioning member and the bottom wall of the groove are close to each other are respectively abutted against the two sides of the first boss.

[0023] According to one embodiment of the present application, it also includes:

[0024] The spacer is arranged on one side of the cover plate close to the pole core of the battery core and is sleeved outside the insulating member.

[0025] According to one embodiment of the present application, the spacer forms a fifth through hole, the outer wall of the insulating member is circumferentially provided with a second boss, the second boss is located outside the first through hole and close to the pole core of the battery cell, and the second boss is arranged in the fifth through hole.

[0026] According to one embodiment of the present application, the conductive sheet and the positioning assembly are connected by welding.

[0027] According to an embodiment of the present application, the welding method includes one of laser welding and brazing.

[0028] According to an embodiment of the present application, the length and width of the first through hole are e and f respectively, the length and width of the cover plate are c and d respectively, and the area of ​​the tab located at the mounting position is S, satisfying the following formula:

[0029] f≤2 / 3d, and S<2ef≤1 / 2cd.

[0030] In a second aspect, the present application provides a battery, the battery comprising:

[0031] Battery cells;

[0032] a housing, wherein the battery cell is disposed in the housing; and

[0033] As described above, the cover plate assembly is connected to the battery cell and the shell respectively.

[0034] According to the battery of the present application, the overall structure of the cover assembly is optimized by allowing one end of the pole ear in the cover assembly away from the pole core of the battery cell to pass through the second through hole formed by the positioning assembly and extend to the installation position, and be electrically connected to the conductive sheet, thereby not only improving the performance and reliability of the battery, but also reducing the production cost and improving the production efficiency.

[0035] In a third aspect, the present application provides a battery pack comprising a plurality of batteries as described above.

[0036] According to the battery pack provided in the embodiment of the present application, by using the above-mentioned batteries, optimization in many aspects such as space utilization, current carrying capacity, structural stability, safety, production efficiency and maintenance convenience is achieved, thereby improving the reliability and cost-effectiveness of the battery pack.

[0037] In a fourth aspect, the present application provides an electrical device including the above-mentioned battery pack.

[0038] According to the electric equipment of the present application, by using the above-mentioned battery pack, the safety and reliability of the use of the electric equipment are improved.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1 This is one of the structural schematic diagrams of the cover plate assembly and the battery cell provided in the embodiment of the present application when they are matched;

[0042] Figure 2 This is the second structural schematic diagram of the cover plate assembly and the battery cell provided in the embodiment of the present application, in which the conductive sheet is hidden;

[0043] Figure 3 This is one of the cross-sectional views of the cover plate assembly provided in the embodiment of the present application with the conductive sheet hidden;

[0044] Figure 4 This is the second cross-sectional view of the cover plate assembly provided in the embodiment of the present application with the conductive sheet hidden;

[0045] Figure 5 It is a schematic diagram of the structure of the insulating member and the positioning assembly provided in the embodiment of the present application;

[0046] Figure 6is a schematic diagram of the structure of the cover plate provided in an embodiment of the present application;

[0047] Figure 7 is a schematic diagram of the structure of the spacer provided in an embodiment of the present application;

[0048] Figure 8 is a schematic structural diagram of an insulating member provided in an embodiment of the present application;

[0049] Fig. 9 is a schematic structural diagram of a first positioning member provided in an embodiment of the present application;

[0050] Fig.10 It is one of the structural schematic diagrams of the second positioning member provided in the embodiment of the present application;

[0051] Fig.11 This is the second structural schematic diagram of the second positioning member provided in the embodiment of the present application.

[0052] Reference numerals:

[0053] 110, cover plate; 111, first through hole; 112, groove;

[0054] 120, insulating member; 121, first boss; 122, second boss; 123, third through hole;

[0055] 130, positioning assembly; 1301, mounting position; 13011, first notch; 13012, first sink; 130121, second notch;

[0056] 131, first positioning member; 1310, second through hole; 1311, third boss; 1312, fourth boss;

[0057] 132, second positioning member; 1321, fourth through hole; 1322, second sink;

[0058] 140. Conductive sheet;

[0059] 150, spacer ring; 151, fifth through hole;

[0060] 910, pole core; 920, pole ear; 921, folded edge. DETAILED DESCRIPTION

[0061] The embodiments of the present application 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 application, and cannot be understood as limiting the present application.

[0062] Reference below Figure 1-Figure 11The cover plate assembly provided in the embodiment of the present application is described, and the cover plate assembly includes a cover plate 110 , an insulating member 120 , a positioning assembly 130 and a conductive sheet 140 .

[0063] The cover plate 110 is provided with a first through hole 111. It should be noted that the size and number of the first through holes 111 can be designed according to actual needs, and this embodiment does not impose any specific restrictions on this. Exemplarily, the first through hole 111 is a waist-shaped hole.

[0064] The insulating member 120 is sealed and penetrates the first through hole 111 to electrically isolate the battery cell from the cover plate 110, reduce the possibility of short circuit, and ensure the safe operation of the battery cell. Exemplarily, the material of the insulating member 120 includes but is not limited to rubber.

[0065] The positioning assembly 130 is installed in the first through hole 111 through the insulating member 120. The positioning assembly 130 has a mounting position 1301 and forms a second through hole 1310 connected to the mounting position 1301, so that the pole ear 920 of the battery cell extends from the second through hole 1310 to the mounting position 1301. The conductive sheet 140 is arranged at the mounting position 1301 and is electrically connected to the pole ear 920. It should be noted that the size and number of the second through hole 1310 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. Exemplarily, the second through hole 1310 is a waisted hole.

[0066] It can be understood that, compared with the related art that requires a pole to be passed through the cover plate and a pole tab lead-out piece to be arranged on the side of the cover plate close to the battery cell to be electrically connected to the pole tab, the positioning assembly 130 is installed in the first through hole 111 of the cover plate 110 through the insulating member 120, and the end of the pole tab 920 away from the pole core 910 of the battery cell passes through the second through hole 1310 and extends to the mounting position 1301 and is electrically connected to the conductive sheet 140, thereby reducing the number of required parts, improving the convenience of assembly and reducing the production cost, and making the overall structure of the cover plate assembly as compact as possible to improve the internal space utilization of the battery and improve the electrochemical performance of the battery.

[0067] According to the cover plate assembly provided in the embodiment of the present application, the overall structure of the cover plate assembly is optimized by allowing one end of the pole ear 920 away from the pole core 910 of the battery cell to pass through the second through hole 1310 formed by the positioning assembly 130 and extend to the installation position 1301, and be electrically connected to the conductive sheet 140, thereby improving not only the performance and reliability of the battery, but also reducing the production cost and improving the production efficiency.

[0068] In some embodiments, Figures 3 to 5 and Figure 8As shown, the outer wall of the insulating member 120 is provided with a first boss 121 and a second boss 122 along the circumferential direction, respectively. The first boss 121 is located outside the first through hole 111 and is arranged away from the pole core 910 of the battery cell, and the second boss 122 is located outside the first through hole 111 and is arranged close to the pole core 910. The sides of the first boss 121 and the second boss 122 that are close to each other are respectively abutted and matched with the two sides of the cover plate 110. It should be noted that the shape and size of the first boss 121 and the second boss 122 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. For example, the cross-section of the first boss 121 is a square ring, and the cross-section of the second boss 122 is an elliptical ring.

[0069] It can be understood that the first boss 121 and the second boss 122 are respectively located at the top and bottom of the insulating member 120, increasing the contact area between the insulating member 120 and the cover plate 110, and providing a better insulation effect to the cover plate 110, thereby improving the safety of the battery. At the same time, considering that the thickness of the cover plate 110 is relatively thin, the first boss 121 and the second boss 122 can also increase the sealing path length between the insulating member 120 and the cover plate 110, thereby improving the sealing effect.

[0070] In some embodiments, Figures 3 to 5 and Figure 8 As shown, along the length direction of the cover plate 110 , the length of the first boss 121 is greater than the length of the second boss 122 .

[0071] It can be understood that, considering that the second boss 122 is closer to the battery cell than the first boss 121, the length of the first boss 121 is made greater than the length of the second boss 122, that is, along the length direction of the battery cell, the projection of the second boss 122 is located within the projection of the first boss 121, and the projection area of ​​the second boss 122 is smaller than the projection area of ​​the first boss 121, thereby ensuring the sealing effect between the cover plate 110 and the insulating member 120 while reducing the space occupancy rate of the insulating member 120 in the battery.

[0072] In some embodiments, Figures 2 to 5 , Figure 8 and Fig. 9As shown, the insulating member 120 forms a third through hole 123, and the positioning assembly 130 includes a first positioning member 131, which is inserted into the third through hole 123 and forms a second through hole 1310, and a first notch 13011 is provided on a side of the first positioning member 131 away from the pole core 910 of the battery cell, and the first notch 13011 is connected to the second through hole 1310, and the mounting position 1301 includes the first notch 13011. It should be noted that the shapes and sizes of the third through hole 123 and the first notch 13011 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. For example, the third through hole 123 is oval, and the first notch 13011 is square.

[0073] It can be understood that the first positioning member 131 is passed through the third through hole 123 formed by the insulating member 120 to form a second through hole 1310, which can effectively utilize the space, reduce the volume of the positioning component 130, and enhance the connection stability between the first positioning member 131 and the insulating member 120. At the same time, a first notch 13011 is set on the top surface of the first positioning member 131 to ensure that the pole ear 920 can stably extend from the second through hole 1310 to the first notch 13011, and the insulating member 120 is used to isolate the cover plate 110 and the first positioning member 131 to ensure the insulation effect.

[0074] It should be noted that, in order to increase the contact area between the tab 920 and the first notch 13011 , the end of the tab 920 away from the pole core 910 is bent to form a folded edge 921 , and the bottom surface of the folded edge 921 is in contact with the first notch 13011 .

[0075] In some embodiments, Figures 3 to 5 , Figure 8 and Fig. 9 As shown, the outer wall of the insulating member 120 is provided with a second boss 122 along the circumferential direction, and the second boss 122 is located outside the first through hole 111 and is arranged close to the pole core 910; the outer wall of the first positioning member 131 is provided with a third boss 1311 along the circumferential direction, and the third boss 1311 is located outside the third through hole 123 and is arranged close to the pole core 910, and the opposite sides of the second boss 122 are respectively abutted with the cover plate 110 and the third boss 1311. It should be noted that the shape and size of the third boss 1311 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. For example, the cross-section of the third boss 1311 is an elliptical ring.

[0076] It is understandable that the top and bottom surfaces of the second boss 122 are respectively in contact with the bottom surface of the cover plate 110 and the top surface of the third boss 1311, thereby enhancing the structural stability of the entire cover plate assembly, making the electrical connection between the tab 920 and the conductive sheet 140 more stable, and reducing the risk of poor contact. At the same time, the third boss 1311 is used to increase the contact area and extend the length of the sealing path, thereby improving the sealing effect between the insulating member 120 and the cover plate 110.

[0077] In some embodiments, the first positioning member 131 and the insulating member 120 are interference fit to utilize the elastic properties of the insulating member 120 itself to generate elastic pressure, thereby improving the structural stability of the cover assembly, maintaining the reliability of the electrical connection between the tab 920 and the conductive sheet 140, and helping to reduce production costs and complexity.

[0078] In some embodiments, Figures 1 to 5 , Fig.10 and Fig.11 As shown, the positioning assembly 130 also includes a second positioning member 132, which is sleeved outside the first positioning member 131 and abuts against the insulating member 120. The second positioning member 132 is provided with a first sink 13012 for accommodating the conductive sheet 140, and the bottom wall of the first sink 13012 is provided with a second notch 130121, and the second notch 130121 is connected to the first notch 13011, and the installation position 1301 also includes the first sink 13012. It should be noted that the shapes and sizes of the first sink 13012 and the second notch 130121 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. For example, the first sink 13012 is square, and the second notch 130121 is square.

[0079] It can be understood that the second positioning member 132 is sleeved outside the first positioning member 131 and abuts against the insulating member 120, thereby ensuring additional support and stability while ensuring insulation performance, and the first recessed groove 13012 for accommodating the conductive sheet 140 is set by the second positioning member 132, so that the end of the pole ear 920 away from the pole core 910 passes through the second through hole 1310, the first notch 13011 and the second notch 130121 in sequence, so that the conductive sheet 140 can be electrically connected to the pole ear 920 while the conductive sheet 140 is installed, thereby improving the internal space utilization of the battery and simplifying the steps of connecting the pole ear 920 with the conductive sheet 140, thereby improving production efficiency.

[0080] In some embodiments, Figure 4 and Figure 5 As shown, the second notch 130121 and the first notch 13011 are combined to form a continuous first plane, so that the end of the pole ear 920 away from the pole core 910 is in contact with the first plane.

[0081] It can be understood that after the first positioning member 131 and the second positioning member 132 are assembled together, the first notch 13011 located at the top surface of the first positioning member 131 and the second notch 130121 located at the bottom of the first groove 13012 formed by the second positioning member 132 are combined to form a continuous first plane, thereby increasing the contact area between the pole ear 920 and the positioning assembly 130 as much as possible, thereby enhancing the mechanical stability of the electrical connection between the pole ear 920 and the conductive sheet 140.

[0082] In some embodiments, Figure 2 , Figure 4 and Figure 5 As shown, the bottom wall of the first sink 13012 and the side of the first positioning member 131 away from the pole core 910 are spliced ​​to form a continuous second plane, so that the side of the conductive sheet 140 away from the pole core 910 is connected to the second plane.

[0083] It can be understood that after the positioning assembly 130, the battery cell and the pole ear 920 are assembled together, the portion of the bottom wall of the first groove 13012 close to the second notch 130121 and the portion of the top surface of the first positioning member 131 close to the first notch 13011 are spliced ​​together to form a second plane, so that the bottom surface of the conductive sheet 140 is in contact with the second pole ear 920 and the second screen respectively, providing stable support while simplifying the installation process of the conductive sheet 140, increasing the contact area between the conductive sheet 140 and the positioning assembly 130, so as to improve the reliability and durability of the cover assembly.

[0084] In some embodiments, Figure 3 , Figure 4 , Fig. 9 , Fig.10 and Fig.11 As shown, the second positioning member 132 is provided with a fourth through hole 1321 and forms a second sunken groove 1322, the notch of the second sunken groove 1322 and the notch of the first sunken groove 13012 are arranged oppositely, the fourth through hole 1321 is respectively connected with the first sunken groove 13012 and the second sunken groove 1322, the outer wall of the first positioning member 131 is provided with a fourth boss 1312 along the circumferential direction, the fourth boss 1312 is penetrated through the insulating member 120 and abuts with the second sunken groove 1322, and the first positioning member 131 is located at the outer wall portion of the fourth boss 1312 away from the pole core 910 and abuts with the inner edge of the fourth through hole 1321. It should be noted that the shapes and sizes of the fourth through hole 1321, the second sunken groove 1322 and the fourth boss 1312 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. Exemplarily, the fourth through hole 1321 is a waisted circular hole, the second sinking groove 1322 is square, and the cross section of the fourth boss 1312 is an elliptical ring.

[0085] It should be noted that, along the length direction of the cover plate 110, the length of the top surface of the first positioning member 131 is smaller than the length of the fourth boss 1312, and the length of the fourth boss 1312 is smaller than the length of the third boss 1311; along the direction away from the pole core 910, the third boss 1311, the fourth boss 1312 and the first notch 13011 are arranged in sequence.

[0086] It can be understood that the first groove 13012 and the second groove 1322 are respectively arranged at the top and bottom of the second positioning member 132, and the top surface of the first positioning member 131 passes through the second groove 1322 and the fourth through hole 1321 in sequence and is spliced ​​with the bottom wall of the first groove 13012 to form a second plane. At the same time, the outer wall of the fourth boss 1312 is respectively fitted with the inner wall of the second groove 1322 and the inner wall of the third through hole 123, and the outer wall of the first positioning member 131 at the top is fitted with the inner wall of the fourth through hole 1321, thereby enhancing the connection stability between the positioning assembly 130 and the insulating member 120, and ensuring that the connection between the pole ear 920 and the conductive sheet 140 remains stable during the use of the battery.

[0087] In some embodiments, Figures 3 to 6 As shown, the outer wall of the insulating member 120 is provided with a first boss 121 along the circumferential direction, and the first boss 121 is located outside the first through hole 111 and away from the pole core 910 of the battery cell; the cover plate 110 forms a groove 112, and the first through hole 111 is located at the bottom wall of the groove 112, and the outer wall of the second positioning member 132 close to the pole core 910 and the outer wall of the first boss 121 are both abutted and matched with the inner wall of the groove 112, and the side of the second positioning member 132 and the bottom wall of the groove 112 close to each other are respectively abutted and matched with the two sides of the first boss 121. It should be noted that the shape and size of the groove 112 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. Exemplarily, the groove 112 is square.

[0088] It can be understood that the outer wall of the second positioning member 132 close to the pole core 910 and the outer wall of the first boss 121 are respectively abutted against the inner wall of the groove 112, thereby providing clear guidance and radial limitation for the assembly of the second positioning member 132, and enhancing the mechanical stability of the cover assembly, which helps to better fix the insulating member 120 in the groove 112 and reduce the displacement caused by mechanical vibration or thermal expansion, thereby improving the insulation performance of the battery.

[0089] At the same time, the top surface and bottom surface of the first boss 121 are respectively abutted with the bottom surface of the second positioning member 132 and the bottom wall of the groove 112, thereby enhancing the structural stability of the entire cover assembly, making the electrical connection between the tab 920 and the conductive sheet 140 more stable, and reducing the risk of poor contact. At the same time, the top surface of the first boss 121 and the bottom surface of the second positioning member 132 are abutted to increase the contact area and extend the length of the sealing path, thereby improving the sealing effect between the insulating member 120 and the cover 110.

[0090] In some embodiments, an interference fit is formed between the second positioning member 132, the insulating member 120 and the cover plate 110 to utilize the elastic properties of the insulating member 120 itself to generate elastic pressure, thereby improving the structural stability of the cover plate assembly, maintaining the reliability of the electrical connection between the tab 920 and the conductive sheet 140, and helping to reduce production costs and complexity.

[0091] In some embodiments, the conductive sheet 140 and the positioning assembly 130 are connected by welding.

[0092] It can be understood that after the cover plate 110, the insulating member 120, the spacer 150, the first positioning member 131, the first positioning member 131 and the second positioning member 132 are assembled in sequence, and one end of the pole ear 920 is projected to the first notch 13011 and the second notch 130121, it is only necessary to weld the conductive sheet 140 and the positioning assembly 130 together, thereby greatly saving manufacturing costs and manufacturing efficiency.

[0093] In some embodiments, the welding method includes one of laser welding and brazing.

[0094] It can be understood that compared with the related technologies that require secondary welding of riveting and laser welding or secondary welding of brazing and laser welding, only one welding of laser welding or brazing is required, which can improve production efficiency and reduce manufacturing costs, reduce the possibility of foreign matter entering the battery cell, and improve the electrochemical performance and reliability of the battery.

[0095] In some embodiments, Figure 2 and Figure 5 As shown, the notch surface of the second positioning member 132 close to the first sink groove 13012 and the side of the conductive sheet 140 away from the pole core 910 are connected by laser welding.

[0096] It is understandable that after the conductive sheet 140 is disposed in the first groove 13012, the top surface of the conductive sheet 140 and the top surface of the second positioning member 132 close to the first groove 13012 are connected by laser welding, which facilitates operation and achieves a sealing effect.

[0097] In other embodiments, Figure 1As shown, a side of the first positioning member 131 away from the pole core 910 , an inner wall of the first sink 13012 , and a side of the conductive sheet 140 close to the pole core 910 are connected by brazing.

[0098] It can be understood that after one end of the pole ear 920 is fitted into the first notch 13011 and the second notch 130121, the solder is laid in the first groove 13012 of the second positioning member 132, the top surface of the first positioning member 131 close to the second through hole 1310 and the top surface of the pole ear 920, and then the bottom surface of the conductive sheet 140, the inner wall of the first groove 13012, the pole ear 920 and the top surface of the first positioning member 131 are tightly connected by brazing, thereby increasing the contact area of ​​the connection and improving the connection strength and stability.

[0099] In some embodiments, the material of each of the first positioning member 131 and the second positioning member 132 includes but is not limited to ceramic or metal.

[0100] It should be noted that when the first positioning member 131 is made of ceramic material, the welding point between the first positioning member 131 and the conductive sheet 140 needs to be plated with a metal layer first.

[0101] In some embodiments, the length and width of the first through hole 111 are e and f respectively, the length and width of the cover plate 110 are c and d respectively, and the area of ​​the tab 920 located at the mounting position 1301 is S, satisfying the following formula:

[0102] f≤2 / 3d, and S<2ef≤1 / 2cd.

[0103] It can be understood that the length and width of the folded edge 921 are a and b respectively. By satisfying the conditions of S=ab<2ef≤1 / 2cd and f≤2 / 3d, the mechanical strength of the cover plate 110 is ensured while helping to optimize the internal space of the battery and ensure effective connection between the tab 920 and the conductive sheet 140. Under the premise of satisfying the minimum flow area of ​​the tab 920, the material cost is saved to the greatest extent possible and the space utilization inside the battery is improved.

[0104] In some embodiments, Figures 1 to 4 and Figure 7 As shown, the cover plate assembly further includes a spacer 150 , which is disposed on a side of the cover plate 110 close to the pole core 910 of the battery cell and is sleeved outside the insulating member 120 .

[0105] It can be understood that a spacer 150 is arranged between the cover plate 110 and the pole core 910, so that the top surface of the spacer 150 fits with the bottom surface of the cover plate 110, and is sleeved outside the insulating member 120, providing additional insulation and positioning for the battery cell, making the assembly of the insulating member 120 and the cover plate 110 more precise, which helps to improve the reliability of the battery.

[0106] In some embodiments, Figure 3 , Figure 4 and Figure 7 As shown, the spacer 150 forms a fifth through hole 151, and the outer side wall of the insulating member 120 is provided with a second boss 122 along the circumferential direction; the spacer 150 forms the fifth through hole 151, the second boss 122 is located outside the first through hole 111 and is arranged close to the pole core 910 of the battery cell, and the second boss 122 is arranged in the fifth through hole 151. It should be noted that the shape and size of the fifth through hole 151 can be designed according to actual needs, and this embodiment does not impose specific restrictions on this. Exemplarily, the fifth through hole 151 is a waisted round hole.

[0107] It can be understood that the outer wall of the second boss 122 and the inner wall of the fifth through hole 151 fit together, which helps to improve the space utilization and assembly accuracy inside the battery, as well as the radial limitation of the insulating member 120 and the first positioning member 131, thereby enhancing the structural stability of the cover assembly.

[0108] The embodiment of the present application also provides a battery.

[0109] like Figure 1 , Figure 2 and Figure 5 As shown, the battery includes a battery cell, a shell and the above-mentioned cover plate assembly, the battery cell is arranged in the shell, and the cover plate assembly is connected to the battery cell and the shell respectively.

[0110] It should be noted that the battery may include but is not limited to lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. The battery may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Batteries are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0111] According to the battery provided in the embodiment of the present application, the pole ear 920 in the cover assembly is made to pass through the second through hole 1310 formed by the positioning assembly 130 at one end of the pole core 910 of the battery cell and extend to the installation position 1301, and is electrically connected to the conductive sheet 140, thereby optimizing the overall structure of the cover assembly, which not only improves the performance and reliability of the battery, but also reduces the production cost and improves the production efficiency.

[0112] An embodiment of the present application also provides a battery pack, comprising a plurality of batteries as described above.

[0113] It should be noted that the number and specific distribution of batteries can be designed according to actual needs, and this embodiment does not impose any specific restrictions on this.

[0114] In order to meet different power requirements, multiple batteries can be connected in series, in parallel or in hybrid connection. Hybrid connection refers to a mixture of series and parallel connection. Multiple batteries can be directly connected in series, in parallel or in hybrid connection, and then the whole formed by multiple batteries can be accommodated in a box; of course, the battery can also be a battery module formed by connecting multiple batteries in series, in parallel or in hybrid connection, and then multiple battery modules are connected in series, in parallel or in hybrid connection to form a whole and accommodated in a box. The battery pack can also include other structures. For example, the battery pack can also include a busbar component for realizing electrical connection between multiple batteries.

[0115] In some embodiments, multiple rows of battery packs may be arranged along a first direction, and each row of battery packs includes multiple batteries arranged along a second direction. The first direction and the second direction are respectively the length direction of the box and the width direction of the box, and the first direction and the second direction are perpendicular to each other.

[0116] Each battery may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery may be cylindrical, flat, rectangular or in other shapes.

[0117] According to the battery pack provided in the embodiment of the present application, by using the above-mentioned batteries, optimization in many aspects such as space utilization, current carrying capacity, structural stability, safety, production efficiency and maintenance convenience is achieved, thereby improving the reliability and cost-effectiveness of the battery pack.

[0118] An embodiment of the present application also provides an electrical device, including the above-mentioned battery pack.

[0119] It should be noted that electrical equipment refers to equipment that uses batteries as power sources, including but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0120] According to the electric equipment provided in the embodiment of the present application, by using the above-mentioned battery pack, the safety and reliability of the use of the electric equipment are improved.

[0121] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0122] In the description of the present application, it should be understood 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0123] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0124] In the description of the present application, “plurality” means two or more.

[0125] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0126] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0127] 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 present application. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0128] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that: include: The cover plate (110) is provided with a first through hole (111); An insulating member (120) is sealingly disposed through the first through hole (111); a positioning assembly (130), the positioning assembly (130) being mounted on the first through hole (111) through the insulating member (120), the positioning assembly (130) having a mounting position (1301) and forming a second through hole (1310) connected to the mounting position (1301), so that a portion of the pole ear (920) of the battery cell extends from the second through hole (1310) to the mounting position (1301); The conductive sheet (140) is disposed at the mounting position (1301) and is electrically connected to the tab (920).

2. The cover plate assembly according to claim 1, characterized in that: The outer side wall of the insulating member (120) is provided with a first boss (121) and a second boss (122) along the circumferential direction, respectively; the first boss (121) is located outside the first through hole (111) and is arranged away from the pole core (910) of the battery cell; the second boss (122) is located outside the first through hole (111) and is arranged close to the pole core (910); the sides of the first boss (121) and the second boss (122) close to each other are respectively abutted against two sides of the cover plate (110).

3. The cover plate assembly according to claim 2, characterized in that: Along the length direction of the cover plate (110), the length of the first boss (121) is greater than the length of the second boss (122).

4. The cover plate assembly according to any one of claims 1 to 3, characterized in that: The insulating member (120) forms a third through hole (123), and the positioning assembly (130) comprises: A first positioning member (131) is inserted into the third through hole (123) to form the second through hole (1310), and a first notch (13011) is provided on a side of the first positioning member (131) away from the pole core (910) of the battery cell, the first notch (13011) is connected to the second through hole (1310), and the mounting position (1301) includes the first notch (13011).

5. The cover plate assembly according to claim 4, characterized in that: The outer wall of the insulating member (120) is provided with a second boss (122) along the circumferential direction, and the second boss (122) is located outside the first through hole (111) and is arranged close to the pole core (910). The outer wall of the first positioning member (131) is provided with a third boss (1311) along the circumferential direction, and the third boss (1311) is located outside the third through hole (123) and is arranged close to the pole core (910). The opposite sides of the second boss (122) are respectively abutted and matched with the cover plate (110) and the third boss (1311).

6. The cover plate assembly according to claim 4, characterized in that: The positioning assembly (130) further includes: The second positioning member (132) is sleeved outside the first positioning member (131) and abuts against the insulating member (120). The second positioning member (132) is provided with a first recessed groove (13012) for accommodating the conductive sheet (140). The bottom wall of the first recessed groove (13012) is provided with a second notch (130121), and the second notch (130121) is connected to the first notch (13011). The mounting position (1301) also includes the first recessed groove (13012).

7. The cover plate assembly according to claim 6, characterized in that: The notch surface of the second positioning member (132) close to the first sink groove (13012) and the surface of the conductive sheet (140) away from the pole core (910) are connected by laser welding; or A side of the first positioning member (131) away from the pole core (910), an inner wall of the first sink groove (13012) and a side of the conductive sheet (140) close to the pole core (910) are connected by brazing.

8. The cover plate assembly according to claim 6, characterized in that: The second notch (130121) and the first notch (13011) are assembled to form a continuous first plane, so that the end of the pole ear (920) away from the pole core (910) is in contact with the first plane.

9. The cover plate assembly according to claim 6, characterized in that: The bottom wall of the first sink (13012) and the side of the first positioning member (131) away from the pole core (910) are spliced ​​to form a continuous second plane, so that the side of the conductive sheet (140) away from the pole core (910) is connected to the second plane.

10. The cover plate assembly according to claim 6, characterized in that: The second positioning member (132) is provided with a fourth through hole (1321) and forms a second recessed groove (1322); the notch of the second recessed groove (1322) and the notch of the first recessed groove (13012) are arranged opposite to each other; the fourth through hole (1321) is respectively connected with the first recessed groove (13012) and the second recessed groove (1322); the outer wall of the first positioning member (131) is provided with a fourth boss (1312) along the circumferential direction; the fourth boss (1312) penetrates the insulating member (120) and abuts and cooperates with the second recessed groove (1322); the first positioning member (131) is located at the outer wall portion of the fourth boss (1312) away from the pole core (910) and abuts and cooperates with the inner edge of the fourth through hole (1321).

11. The cover plate assembly according to claim 6, characterized in that: The outer wall of the insulating member (120) is provided with a first boss (121) along the circumferential direction; the first boss (121) is located outside the first through hole (111) and away from the pole core (910) of the battery cell; the cover plate (110) forms a groove (112); the first through hole (111) is located on the bottom wall of the groove (112); the outer wall of the second positioning member (132) close to the pole core (910) and the outer wall of the first boss (121) are both in abutment with the inner wall of the groove (112); and the side of the second positioning member (132) and the bottom wall of the groove (112) close to each other are respectively in abutment with two sides of the first boss (121).

12. The cover plate assembly according to any one of claims 1 to 11, characterized in that: Also includes: The spacer (150) is arranged on a side of the cover plate (110) close to the pole core (910) of the battery cell and is sleeved outside the insulating member (120).

13. The cover plate assembly according to claim 12, characterized in that: The spacer (150) forms a fifth through hole (151); the outer wall of the insulating member (120) is circumferentially provided with a second boss (122); the second boss (122) is located outside the first through hole (111) and is arranged close to the pole core (910) of the battery cell; and the second boss (122) is arranged in the fifth through hole (151).

14. The cover plate assembly according to any one of claims 1 to 13, characterized in that: The conductive sheet (140) and the positioning assembly (130) are connected by welding.

15. The cover plate assembly according to claim 14, characterized in that: The welding method includes one of laser welding and brazing.

16. The cover plate assembly according to any one of claims 1 to 15, characterized in that: The length and width of the first through hole (111) are e and f respectively, the length and width of the cover plate (110) are c and d respectively, and the area of ​​the tab (920) located at the mounting position (1301) is S, satisfying the following formula: f≤2 / 3d, and S<2ef≤1 / 2cd.

17. A battery, characterized in that: include: Battery cells; A shell, wherein the battery cell is arranged in the shell; as well as The cover plate assembly according to any one of claims 1 to 16, wherein the cover plate assembly is connected to the battery cell and the shell respectively.

18. A battery pack, characterized in that: include: A plurality of batteries as claimed in claim 17.

19. An electrical equipment, characterized in that: Comprising the battery pack as claimed in claim 18.

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