Cover plate assembly, battery monomer, battery module, battery pack and electric equipment

Abstract

The invention discloses a cover plate assembly, a battery monomer, a battery module, a battery pack and electric equipment, and belongs to the technical field of batteries. The cover plate assembly comprises a cover plate body and an adapter piece. An avoiding hole is formed in the cover plate body; the switching piece penetrates through the avoiding hole, the part, located on one side of the cover plate body, of the switching piece is used for being connected with a pole lug of a pole core, and the part, located on the other side of the cover plate body, of the switching piece is used for being connected with a switching piece of an adjacent single battery. According to the invention, the structure of the pole is simplified, the internal resistance of the switching sheet is reduced, the over-current capability of the switching sheet is stronger, and the high temperature resistance and the over-current performance are better.

Description

Technical Field

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

[0002] Battery cells are usually provided with poles, which may cause the battery cells to have problems such as poor current carrying capacity, multiple parts and processes, poor connection strength and low reliability.

[0003] Related technologies have developed a cover assembly that can replace the function of the pole. Although it reduces the number of parts in the battery cell, the integrated design of the cover assembly leads to poor structural reliability of the cover assembly. The reliability of the connection between the cover assembly and the pole ear is poor, which needs to be improved. Summary of the invention

[0004] 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 cell, a battery module, a battery pack and an electrical device, which simplifies the structure of the battery cell and reduces the cost.

[0005] In a first aspect, the present application provides a cover plate assembly, comprising:

[0006] A cover plate body, wherein the cover plate body is provided with an avoidance hole;

[0007] The adapter plate is passed through the avoidance hole, the portion of the adapter plate located on one side of the cover body is used to connect with the pole ear of the pole core, and the portion of the adapter plate located on the other side of the cover body is used to connect with the adapter plate of the adjacent battery cell.

[0008] According to the cover plate assembly of the present application, a cover plate body and an adapter plate are provided, the adapter plate is an integrated structure, the adapter plate is inserted into the avoidance hole of the cover plate body, and the adapter plate is respectively connected to the pole ear and the adapter plate. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell, improving the current carrying capacity of current carrying parts such as the adapter plate, thereby improving the high temperature resistance and excessive current performance of the battery cell.

[0009] According to one embodiment of the present application, the adapter plate includes a first part and a second part connected in sequence, the first part has a first connecting section connected to the adapter plate of an adjacent battery cell, and the second part has a second connecting section for connecting to the pole ear of the pole core; the outer diameter of the first part is smaller than the outer diameter of the second part.

[0010] According to one embodiment of the present application, the first part includes a first segment and a second segment connected, the outer diameter of the first segment is smaller than the outer diameter of the second segment, the first segment has the first connecting segment, and the end of the second segment facing away from the first segment is connected to the second part.

[0011] According to an embodiment of the present application, the cover plate assembly further includes: a sealing member, wherein the sealing member is sandwiched between the adapter plate and the avoidance hole.

[0012] According to one embodiment of the present application, the second portion is provided with an annular groove, the annular groove is arranged opposite to the avoidance hole, and at least a portion of the sealing element is located in the annular groove.

[0013] According to one embodiment of the present application, the seal includes a first sealing segment, a second sealing segment and a third sealing segment connected in sequence, the second sealing segment is arranged between the adapter plate and the avoidance hole, and the first sealing segment and the third sealing segment are located on the side wall of the adapter plate.

[0014] According to one embodiment of the present application, the cover plate assembly further includes a support assembly, and the support assembly is positioned and matched with the second part.

[0015] According to one embodiment of the present application, the support assembly includes a first support member and a second support member, the first support member and the second support member are connected, the first support member and the second support member are combined to form a through hole, and the second part is inserted into the through hole and the avoidance hole.

[0016] According to an embodiment of the present application, the first supporting member is provided with a first connecting member, and the second supporting member is provided with a second connecting member plugged into the first connecting member; and / or,

[0017] The support assembly is provided with a first plug-in connector, the second part is provided with a second plug-in connector plugged with the first plug-in connector, the first plug-in connector and the second plug-in connector are positioned and matched; and / or,

[0018] An escape groove is provided at one end of the first support member and the second support member away from the cover plate body, and the escape groove is used to escape the tab; and / or,

[0019] The support assembly is provided with a plurality of weight-reducing holes, and the plurality of weight-reducing holes are distributed at intervals along an extension direction of the support assembly.

[0020] According to one embodiment of the present application, the cover plate body is provided with a glue injection hole;

[0021] The cover assembly also includes a glue limiting mechanism, which is suitable for being arranged between the cover body and the support assembly, and the glue limiting mechanism surrounds the outer side of the adapter plate, and the glue limiting mechanism is separated from the outer side of the adapter plate to form a glue injection channel, and the glue injection hole is connected to the glue injection channel.

[0022] In a second aspect, the present application provides a battery cell, comprising:

[0023] case;

[0024] A pole core, wherein the pole core is provided with a pole ear;

[0025] In the cover plate assembly as described in any of the above embodiments, the cover plate body of the cover plate assembly and the shell form a receiving cavity, the pole core is arranged in the receiving cavity, and the adapter plate of the cover plate assembly is connected to the pole ear.

[0026] According to the battery cell of the present application, a cover plate assembly is provided, and the cover plate assembly is provided with a cover plate body and an adapter plate, the adapter plate is an integrated structure, the adapter plate is passed through the avoidance hole of the cover plate body, and the adapter plate is respectively connected to the pole ear and the adapter plate. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell, improving the current carrying capacity of current carrying parts such as the adapter plate, thereby improving the high temperature resistance and excessive current performance of the battery cell.

[0027] According to one embodiment of the present application, the pole tab is connected to the adapter plate by lap welding, and the area where the pole tab and the adapter plate are welded is located between the first support member and the second support member of the cover plate assembly.

[0028] According to an embodiment of the present application, the pole cores include two, and the two pole ears of the two pole cores are respectively connected to the two sides of the adapter plate by lap welding.

[0029] In a third aspect, the present application provides a battery module, comprising a connecting piece and at least two battery cells as described in any one of the above embodiments, wherein the connecting pieces of two adjacent battery cells are connected via the adapter piece.

[0030] According to the battery module of the present application, a cover plate assembly is provided, and the cover plate assembly is provided with a cover plate body and an adapter plate, the adapter plate is an integrated structure, the adapter plate is passed through the avoidance hole of the cover plate body, and the adapter plate is respectively connected to the pole ear and the adapter plate. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell, improving the current carrying capacity of current carrying parts such as the adapter plate, thereby improving the high temperature resistance and excessive current performance of the battery cell.

[0031] According to an embodiment of the present application, the battery module further includes a tray, and at least two of the battery cells are disposed on the tray.

[0032] In a fourth aspect, the present application provides a battery pack, comprising a battery module as described in any of the above embodiments.

[0033] According to the battery pack of the present application, a cover plate assembly is provided, and the cover plate assembly is provided with a cover plate body and an adapter plate, the adapter plate is an integrated structure, the adapter plate is inserted into the avoidance hole of the cover plate body, and the adapter plate is respectively connected to the pole ear and the adapter plate. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell, improving the current carrying capacity of current carrying parts such as the adapter plate, thereby improving the high temperature resistance and excessive current performance of the battery cell.

[0034] In a fifth aspect, the present application provides an electrical device, comprising a battery module as described in any of the above embodiments.

[0035] 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

[0036] 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:

[0037] Figure 1 is a schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0038] Figure 2 It is one of the structural schematic diagrams of a battery cell provided in an embodiment of the present application;

[0039] Figure 3 This is the second structural schematic diagram of a battery cell provided in an embodiment of the present application;

[0040] Figure 4 It is one of the structural schematic diagrams of the cover plate assembly provided in the embodiment of the present application;

[0041] Figure 5 This is the second structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0042] Figure 6 This is the third structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0043] Figure 7 This is the fourth structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0044] Figure 8This is the fifth structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0045] Fig. 9 This is the sixth structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0046] Fig.10 This is the seventh structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0047] Fig.11 This is the eighth structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0048] Fig.12 This is the ninth structural schematic diagram of the cover plate assembly provided in the embodiment of the present application;

[0049] Fig.13 This is the tenth structural schematic diagram of the cover assembly provided in the embodiment of the present application.

[0050] Reference numerals:

[0051] Battery cell 1000;

[0052] Cover plate assembly 100, cover plate body 11, avoidance hole 111, glue injection hole 112, explosion-proof valve 113, injection hole 114, adapter 2, first part 21, first section 211, second section 212, second part 22, annular groove 221, second connector 222, seal 3, first sealing section 31, second sealing section 32, third sealing section 33, support assembly 4, first support member 41, first connecting member 411, second support member 42, second connecting member 421, through hole 43, avoidance groove 44, weight reduction hole 45, glue limiting mechanism 5;

[0053] The pole core 200 , the pole ear 201 , the shell 300 , and the connecting piece 400 . DETAILED DESCRIPTION

[0054] 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.

[0055] Reference below Figure 1-Figure 13 The cap plate assembly 100 , the battery cell 1000 , the battery module, the battery pack and the electric device according to the embodiments of the present application are described.

[0056] The core of the battery cell includes but is not limited to lithium batteries and sodium batteries.

[0057] like Figure 1 and Figure 8As shown, the cover assembly 100 of the embodiment of the present application includes: a cover body 11 and a transfer plate 2.

[0058] like Fig. 9 As shown, the cover body 11 is provided with an avoidance hole 111 , which can be shaped like the cross section of the adapter plate 2 . The inner diameter of the avoidance hole 111 is slightly larger than the outer diameter of the cross section of the adapter plate 2 , so that the adapter plate 2 can be inserted into the avoidance hole 111 .

[0059] like Figure 4 As shown, the adapter 2 is electrically connected to the tab 201 and the adapter 2 of the adjacent battery cell 1000 , respectively.

[0060] The tab 201 is a portion of the battery cell 1000 used to connect to an external circuit, and is usually located at the positive and negative ends of the pole core 200. Figure 4 As shown, the portion of the adapter plate 2 located on one side of the cover body 11 is used to connect with the pole ear 201 of the pole core 200. The material of the adapter plate 2 can be the same as or similar to that of the pole ear 201, so that the metal bonding is more firm during connection.

[0061] The tabs 201 include two types: positive and negative. The adapters 2 can be divided into two types: positive and negative. The positive and negative adapters 2 are electrically connected to the tabs one by one. The sizes of the positive and negative adapters 2 are the same.

[0062] Among them, the adapter plate 2 connected to the positive electrode tab can be an aluminum alloy part, which is the same or close to the material of the positive electrode tab; the adapter plate 2 connected to the negative electrode tab can be made of an aluminum alloy part and a copper part, and the copper part is connected to the negative electrode tab. The two parts of the aluminum alloy part and the copper part can be connected by welding. For example, the two parts of the aluminum alloy part and the copper part can be connected by stir friction welding.

[0063] The tab 201 and the adapter plate 2 can be connected by welding methods such as lap welding, for example, laser welding or ultrasonic welding.

[0064] like Fig.10 and Fig.11 As shown, the adapter sheet 2 can be in the form of a sheet, with a larger plane area and a smaller thickness. The length and width of the adapter sheet 2 are much larger than the thickness, and the cross-sectional area of ​​the adapter sheet 2 can be increased so that the adapter sheet 2 can carry a larger current. Compared with the pole with a small cross-sectional area, the internal resistance is reduced; the adapter sheet 2 plays a role in connection and conduction. The larger mechanical strength of the adapter sheet 2 can make it less likely to bend or deform when subjected to external force. The larger cross-sectional area can carry a larger current and allow the current to pass smoothly. Compared with the pole, the adapter sheet 2 is a sheet structure, and the current-carrying capacity of the adapter sheet 2 is stronger, which improves the high temperature resistance and excessive current performance of the battery cell 1000.

[0065] like Figure 1 As shown, the portion of the adapter sheet 2 located on the other side of the cover body 11 is used to connect with the adapter sheet 2 of the adjacent battery cell 1000. The adapter sheets 2 between adjacent battery cells 1000 can be connected by welding methods such as lap welding, for example, laser welding or ultrasonic welding.

[0066] The electrical connection at both ends of the adapter 2 can be completed by welding or other methods, thereby improving the connection effect of the electrical connection at both ends of the adapter 2, improving the reliability of the connection, and reducing the connection resistance.

[0067] Compared with the battery cells with pole structures in the related art, the poles are mostly made up of multiple structures spliced ​​together. The multiple electrical connections of the multiple structures will reduce the reliability of the poles and affect their current carrying capacity.

[0068] According to the cover plate assembly 100 provided in the embodiment of the present application, a cover plate body 11 and an adapter plate 2 are provided, wherein the adapter plate 2 is an integrated structure, and the adapter plate 2 is inserted into the avoidance hole 111 of the cover plate body 11, and the adapter plate 2 is respectively connected to the pole ear 201 and the adapter plate 2. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell 1000, and improving the current carrying capacity of the current carrying parts such as the adapter plate 2, thereby improving the high temperature resistance and excessive current performance of the battery cell 1000.

[0069] In some embodiments, Figure 8 As shown, the adapter plate 2 includes a first portion 21 and a second portion 22 connected in sequence. The first portion 21 and the second portion 22 can be an integrally formed or welded connection structure.

[0070] The first portion 21 has a first connecting section connected to the adapter 2 of the adjacent battery cell 1000 , and the second portion 22 has a second connecting section for connecting to the pole lug 201 of the pole core 200 .

[0071] like Fig.10 and Fig.11 As shown, the outer diameter of the first part 21 is smaller than the outer diameter of the second part 22 to form an expanded diameter structure, which facilitates the assembly of the adapter plate 2 and the sealing member 3 .

[0072] In this embodiment, the cross-sectional area of ​​the first portion 21 is smaller than the cross-sectional area of ​​the second portion 22, thereby improving the uniformity of current distribution when passing through the second portion 22 and reducing the risk of local overheating or excessive current. At the same time, the smaller area of ​​the first portion 21 also helps to reduce material usage and reduce costs.

[0073] It can be understood that the adapter 2 plays the role of connecting the pole ear 201 and drawing out the current in the battery cell 1000, improving the stability of current transmission and the efficiency of battery performance. At the same time, by optimizing the area of ​​the first part 21 and the second part 22, the safety and reliability of the battery can be further improved.

[0074] In some embodiments, Fig.10 and Fig.11 As shown, the first part 21 includes a first section 211 and a second section 212 connected to each other. The outer diameter of the first section 211 is smaller than the outer diameter of the second section 212. The first section 211 has a first connecting section. The end of the second section 212 away from the first section 211 is connected to the second part 22.

[0075] In this embodiment, the outer diameters of the first section 211 , the second section 212 , and the second portion 22 are increased in sequence to form an expanded diameter structure, which facilitates the assembly of the adapter plate 2 and the sealing member 3 .

[0076] It should be noted that, from the first connecting section to the second connecting section, a significant reduction in the cross-section of the adapter plate 2 and a significant change in the cross-sectional shape should be avoided to reduce the impact on the flow capacity of the adapter plate 2.

[0077] In some embodiments, the cross section of the adapter sheet 2 is rectangular, and the entire adapter sheet 2 is in the shape of a sheet.

[0078] In some embodiments, Figure 3 and Figure 4 As shown, the cover plate assembly 100 further includes: a sealing member 3 , which is sandwiched between the adapter plate 2 and the avoidance hole 111 .

[0079] A compressible sealing member 3 is provided between the adapter plate 2 and the avoidance hole 111 . The sealing member 3 is an insulating structure. Exemplarily, the sealing member 3 may be silicone rubber or fluororubber.

[0080] The sealing member 3 is sandwiched between the adapter plate 2 and the avoidance hole 111 in a compressed state, achieving the effects of insulation and sealing.

[0081] In some embodiments, Fig.10 and Fig.11 As shown, the second portion 22 is provided with an annular groove 221 , which is arranged opposite to the avoidance hole 111 , and is used to fix and limit the sealing member 3 .

[0082] At least a portion of the sealing member 3 is located in the annular groove 221 , and a portion or all of the sealing member 3 is located in the annular groove 221 .

[0083] In this embodiment, after adding the seal 3 to the avoidance hole 111, the size of the avoidance hole 111 is slightly smaller than the cross-sectional size of the adapter piece 2. A circular groove 221 is preset in the second part 22. The circular groove 221 is in close fit with the seal 3 and the circular groove 221 has a certain degree of extrusion effect on the seal 3, further enhancing the insulation and sealing effects.

[0084] In some embodiments, as Fig.10 shown, in the length direction of the adapter piece 2, the length L1 of the circular groove 221 is greater than the length of the seal 3, and the outer diameter of the circular groove 221 is greater than the inner diameter of the seal 3, facilitating the assembly of the seal 3 and the circular groove 221. At the same time, the contact area and tightness between the circular groove 221 and the seal 3 are improved. The circular groove 221 has a certain degree of extrusion on the seal 3, and the elasticity of the seal 3 is utilized to maintain a continuous sealing effect.

[0085] In some embodiments, as Fig.10 shown, the adapter piece 2 satisfies: D1 < D3 < D2 ≤ D4, where the thickness of the first section 211 is D1, the thickness of the connection end of the second section 212 and the first section 211 is the same as that of the first section 211, both being D1, the thickness of the connection end of the second section 212 and the second part 22 is D2, the thickness of the circular groove 221 area of the second part 22 is D3, and the thickness of the other areas of the second part 22 is D4.

[0086] In some embodiments, as Fig.11 shown, the adapter piece 2 satisfies: W1 < W3 < W2 ≤ W4, where the width of the first section 211 is W1, the width of the connection end of the second section 212 and the second part 22 is W2, the width of the circular groove 221 area of the second part 22 is W3, and the width of the other areas of the second part 22 is W4.

[0087] In some embodiments, the target area of the adapter piece 2 electrically connected to the negative electrode for connecting to the tab 201 is made of copper material, and the rest of the areas are made of aluminum material to reduce costs.

[0088] In some embodiments, as Figure 4 shown, the seal 3 includes a first seal section 31, a second seal section 32, and a third seal section 33 connected in sequence. The first seal section 31, the second seal section 32, and the third seal section 33 form a groove structure. The second seal section 32 forms the bottom of the groove, and the first seal section 31 and the third seal section 33 form the walls of the groove.

[0089] The second sealing section 32 is arranged between the adapter plate 2 and the avoidance hole 111 to achieve the effects of insulation and sealing; the first sealing section 31 and the third sealing section 33 are located on the side wall of the adapter plate 2, and at least part of the first sealing section 31 and the third sealing section 33 are located between the annular groove 221 and the side wall of the adapter plate 2 to increase the sealing effect.

[0090] The first sealing segment 31 , the second sealing segment 32 and the third sealing segment 33 may be connected by integral molding or gluing.

[0091] In some embodiments, the sealing member 3 includes a second sealing section 32 located between the adapter plate 2 and the avoidance hole 111 , which can also achieve insulation and sealing effects.

[0092] In some embodiments, the seal 3 includes a second sealing segment 32 located between the adapter plate 2 and the avoidance hole 111 , and a first sealing segment 31 or a third sealing segment 33 is disposed on one side of the second sealing segment 32 , which can also achieve insulation and sealing effects.

[0093] In some embodiments, Figure 3 and Figure 4 As shown, the cover plate assembly 100 further includes a support assembly 4, and the support assembly 4 is positioned and matched with the second part 22.

[0094] The support assembly 4 can be a split structure or an integrated structure, and is used to limit the displacement of the adapter 2 in the shell 300 of the pole core 200. The outer diameter of the support assembly 4 should be smaller than the inner diameter of the shell 300 of the battery cell 1000, so as to facilitate the installation of the support assembly 4 in the shell 300.

[0095] In this embodiment, one of the support component 4 and the second part 22 is provided with a positioning hole, and the other of the support component 4 and the second part 22 is provided with a positioning pin. The support component 4 and the second part 22 are positioned and matched with each other through the positioning hole and the positioning pin, thereby limiting the displacement of the adapter 2.

[0096] In some embodiments, Figure 4 , Fig.12 and Fig.13 As shown, the support assembly 4 includes a first support member 41 and a second support member 42. The first support member 41 and the second support member 42 can be symmetrical structures or different structures. The support assembly 4 is configured as a split first support member 41 and a second support member 42 to facilitate the connection and assembly of the support assembly 4 and the adapter plate 2.

[0097] The first support member 41 and the second support member 42 are connected. The first support member 41 and the second support member 42 can be connected by a connection method such as a snap connection, a plug-in connection, and a threaded connection.

[0098] The first support member 41 and the second support member 42 are combined to form a through hole 43 . The through hole 43 is aligned with the avoidance hole 111 . The through hole 43 is used to avoid the second portion 22 . The second portion 22 is inserted through the through hole 43 and the avoidance hole 111 .

[0099] In some embodiments, Figure 4 , Fig.11 and Fig.12 As shown, it satisfies: W5≥W4, D5≥D4; wherein W5 is the length of the through hole 43, W4 is the length of the widest part of the adapter plate 2, D5 is the height of the through hole 43, and D4 is the thickness of the thickest part of the adapter plate 2.

[0100] In this embodiment, the length and width of the through hole 43 are both greater than or equal to the maximum size of the adapter plate 2 , so that the adapter plate 2 can pass through the through hole 43 smoothly, and the support assembly 4 can fix the adapter plate 2 .

[0101] In some embodiments, Fig.12 and Fig.13 As shown, the first supporting member 41 is provided with a first connecting member 411 , and the second supporting member 42 is provided with a second connecting member 421 plugged into the first connecting member 411 .

[0102] In this embodiment, the first support member 41 and the second support member 42 are plugged together to form a support assembly 4 through the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection.

[0103] Exemplarily, one of the first connector 411 and the second connector 421 is a plug hole, a groove or other form suitable for receiving plug-in, and the other of the first connector 411 and the second connector 421 is a pin, a tenon or other form suitable for plug-in.

[0104] Exemplarily, the first connecting member 411 and the second connecting member 421 include multiple pairs, and the number of pairs of the first connecting member 411 and the second connecting member 421 can be 2 or more. For example, the number of pairs of the first connecting member 411 and the second connecting member 421 is greater than or equal to 4 pairs to increase the stability of the connection between the first support member 41 and the second support member 42.

[0105] In some embodiments, Fig.12 and Fig.13 As shown, a plurality of pairs of first connecting members 411 and second connecting members 421 are symmetrically distributed to increase the stability of the connection between the first supporting member 41 and the second supporting member 42 .

[0106] In some embodiments, Fig.12 and Fig.13As shown, the first connecting member 411 and the second connecting member 421 include multiple pairs, and the multiple pairs of the first connecting members 411 and the second connecting members 421 form multiple first connection groups and multiple second connection groups. In the first connection group, the first connecting member 411 is a plug hole and the second connecting member 421 is a plug pin. In the second connection group, the first connecting member 411 is a plug pin and the second connecting member 421 is a plug hole. The first connection groups and the second connection groups are alternately arranged, thereby further increasing the stability of the connection between the first support member 41 and the second support member 42.

[0107] In some embodiments, Fig.12 and Fig.13 As shown, the support assembly 4 is provided with a first connector, and the second part 22 is provided with a second connector 222 plugged with the first connector, and the first connector and the second connector 222 are positioned and matched.

[0108] In this embodiment, the first support member 41 and the second support member 42 form a through hole 43, and the through hole 43 is used for the adapter to pass through. The through hole 43 and the second part 22 are plugged and positioned together through the first connector and the second connector 222, which is convenient to assemble, accurate in positioning and has good connection stability.

[0109] Exemplarily, one of the first connector and the second connector 222 is a plug hole, a groove or other form suitable for receiving a plug, and the other of the first connector and the second connector 222 is a pin, a tenon or other form suitable for plugging.

[0110] Exemplarily, a plurality of pairs of first connectors and second connectors 222 may be provided, and a plurality of first connectors are symmetrically distributed on the support assembly 4 , and correspondingly, a plurality of second connectors 222 are symmetrically distributed on the second portion 22 .

[0111] In some embodiments, when the first connector 411 or the second connector 421 is a plug, the first connector is a part of the first connector 411 or the second connector 421, and the second connector 222 of the second part 22 is a plug hole structure, and the first connector 411 and the second connector 421 will pass through the second connector 222 when assembled.

[0112] The above-mentioned latches all include a guide surface and a locking surface. The guide surface of the latch is used to guide the latch to pass through the locking hole, and the locking surface is used to cooperate with the locking hole to lock and reduce the situation where the latch falls off from the locking hole.

[0113] In some embodiments, Fig.12 and Fig.13 As shown, the support assembly 4 is provided with a plurality of weight-reducing holes 45 . The provision of the weight-reducing holes 45 can reduce the weight of the support assembly 4 , which is beneficial to the lightweight design of the battery cell 1000 and facilitates liquid injection.

[0114] The weight-reducing hole 45 is designed to be circular, elliptical or oblong to maximize weight reduction without sacrificing structural strength. The diameter of the weight-reducing hole 45 can be determined according to the structural analysis results of the support assembly 4 to improve the weight reduction effect and structural safety.

[0115] A plurality of weight-reducing holes 45 may be distributed at intervals along the extension direction of the support assembly 4 to improve the uniformity of weight distribution and reduce the phenomenon of local stress concentration.

[0116] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end away from the cover body 11 , and the avoidance groove 44 is used to avoid the pole ear 201 so that the pole ear 201 can be smoothly connected to the second connecting section of the adapter plate 2 in the avoidance groove 44 .

[0117] The shape and size of the avoidance groove 44 are designed according to the size and shape of the pole tab 201 to avoid squeezing the pole tab 201 and to enable the pole tab 201 to be smoothly installed and maintain good electrical contact with the adapter 2 .

[0118] In some embodiments, the area where the tab 201 is connected to the adapter plate 2 is located in the avoidance groove 44 of the support assembly 4 , and the support assembly 4 protects and fixes the area where the tab 201 is connected to the adapter plate 2 .

[0119] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the support component 4 is provided with a first plug-in connector, and the second part 22 is provided with a second plug-in connector 222 plugged into the first plug-in connector, and the first plug-in connector and the second plug-in connector 222 are positioned and matched; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end facing away from the cover plate body 11, and the avoidance groove 44 is used to avoid the pole ear 201; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0120] In this embodiment, the first support member 41 and the second support member 42 are plugged together through the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the second connector 222 of the second part 22 is a plug hole structure, and the first connecting member 411 and the second connecting member 421 will pass through the second connector 222 during assembly, so as to simultaneously fix the first support member 41, the adapter 2 and the second support member 42 together, which is convenient for assembly and fixation of the three and improves the stability of the connection; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to realizing the lightweight setting of the battery cell 1000; the setting of the avoidance groove 44 can enable the pole ear 201 to be smoothly installed and maintain good electrical contact with the adapter 2.

[0121] In some embodiments, Fig.12 and Fig.13 As shown, the support component 4 is provided with a first connector, and the second part 22 is provided with a second connector 222 plugged into the first connector, and the first connector and the second connector 222 are positioned and matched; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end facing away from the cover plate body 11, and the avoidance groove 44 is used to avoid the pole ear 201; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0122] In this embodiment, the second part 22 is positioned and matched with the support assembly 4 through the first connector and the second connector 222, which is convenient for fixing and assembling the adapter 2; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to realizing the lightweight setting of the battery cell 1000; the setting of the avoidance groove 44 can enable the pole ear 201 to be installed smoothly and maintain good electrical contact with the adapter 2.

[0123] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end away from the cover plate body 11, and the avoidance groove 44 is used to avoid the pole ear 201; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0124] In this embodiment, the first support member 41 and the second support member 42 are plugged together through the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to the lightweight setting of the battery cell 1000; the setting of the avoidance groove 44 can enable the pole ear 201 to be installed smoothly and maintain good electrical contact with the adapter 2.

[0125] In some embodiments, Fig.12 and Fig.13 As shown, the support component 4 is provided with a first connector, the second part 22 is provided with a second connector 222 plugged into the first connector, and the first connector and the second connector 222 are positioned and matched; the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0126] In this embodiment, the first support member 41 and the second support member 42 are plugged together by the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the second connector 222 of the second part 22 is a plug hole structure, and the first connecting member 411 and the second connecting member 421 will pass through the second connector 222 when assembled, so as to fix the first support member 41, the adapter plate 2 and the second support member 42 at the same time, which is convenient for the assembly and fixation of the three and improves the stability of the connection; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to the lightweight setting of the battery cell 1000.

[0127] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the support assembly 4 is provided with a first plug-in connector, and the second part 22 is provided with a second plug-in connector 222 plugged into the first plug-in connector, and the first plug-in connector and the second plug-in connector 222 are positioned and matched; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end facing away from the cover body 11, and the avoidance groove 44 is used to avoid the pole ear 201.

[0128] In this embodiment, the first support member 41 and the second support member 42 are plugged together by the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the second connector 222 of the second part 22 is a plug hole structure, and the first connecting member 411 and the second connecting member 421 will pass through the second connector 222 when assembled, so as to fix the first support member 41, the adapter 2 and the second support member 42 at the same time, facilitate the assembly and fixation of the three, and improve the stability of the connection; the setting of the avoidance groove 44 can enable the pole ear 201 to be smoothly installed and maintain good electrical contact with the adapter 2.

[0129] In some embodiments, Fig.12 and Fig.13As shown, the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end away from the cover plate body 11, and the avoidance groove 44 is used to avoid the pole ear 201; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0130] In this embodiment, the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to the lightweight setting of the battery cell 1000; the setting of the avoidance groove 44 can enable the pole ear 201 to be installed smoothly and maintain good electrical contact with the adapter plate 2.

[0131] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0132] In this embodiment, the first support member 41 and the second support member 42 are plugged together by the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to realizing the lightweight setting of the battery cell 1000.

[0133] In some embodiments, Fig.12 and Fig.13 As shown, the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end away from the cover body 11, and the avoidance groove 44 is used to avoid the pole ear 201.

[0134] In this embodiment, the first support member 41 and the second support member 42 are plugged together through the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the setting of the avoidance groove 44 allows the pole ear 201 to be installed smoothly and maintain good electrical contact with the adapter 2.

[0135] In some embodiments, Fig.12 and Fig.13 As shown, the support component 4 is provided with a first connector, and the second part 22 is provided with a second connector 222 plugged into the first connector, and the first connector and the second connector 222 are positioned and matched; the support component 4 is provided with a plurality of weight-reducing holes 45, and the plurality of weight-reducing holes 45 are distributed at intervals along the extension direction of the support component 4.

[0136] In this embodiment, the second part 22 is positioned and matched with the support assembly 4 through the first connector and the second connector 222, which is convenient for fixing and assembling the adapter 2; the setting of the weight-reducing hole 45 can reduce the weight of the support assembly 4, which is conducive to realizing the lightweight setting of the battery cell 1000.

[0137] In some embodiments, Fig.12 and Fig.13 As shown, the support assembly 4 is provided with a first connector, and the second part 22 is provided with a second connector 222 plugged into the first connector, and the first connector and the second connector 222 are positioned and matched; the first support member 41 and the second support member 42 are provided with an avoidance groove 44 at one end facing away from the cover body 11, and the avoidance groove 44 is used to avoid the pole ear 201.

[0138] In this embodiment, the second part 22 is positioned and matched with the support assembly 4 through the first connector and the second connector 222, which is convenient for fixing and assembling the adapter 2; the setting of the avoidance groove 44 allows the pole ear 201 to be installed smoothly and maintain good electrical contact with the adapter 2.

[0139] In some embodiments, Fig.12 and Fig.13 As shown, the support assembly 4 is provided with a first connector, the second part 22 is provided with a second connector 222 plugged into the first connector, and the first connector and the second connector 222 are positioned and matched; the first support member 41 is provided with a first connecting member 411, and the second support member 42 is provided with a second connecting member 421 plugged into the first connecting member 411.

[0140] In this embodiment, the first support member 41 and the second support member 42 are plugged together by the first connecting member 411 and the second connecting member 421, which is convenient for installation and improves the stability of the connection; the second connector 222 of the second part 22 is a plug hole structure, and the first connecting member 411 and the second connecting member 421 will pass through the second connector 222 when assembled, so as to fix the first support member 41, the adapter plate 2 and the second support member 42 at the same time, so as to facilitate the assembly and fixation of the three and improve the stability of the connection.

[0141] In some embodiments, Figure 5 and Fig. 9 As shown, the cover body 11 is provided with a glue injection hole 112 .

[0142] The glue injection hole 112 is a potting structure. After the battery cell 1000 is installed, it is potted with potting glue to enhance the sealing and heat dissipation effect of the end of the pole core 200.

[0143] like Figure 3 , Figure 4 and Figure 5As shown, the cover assembly 100 further includes a glue limiting mechanism 5, which is disposed on the side of the cover body 11 facing the movement, and is a ring-shaped structure, which surrounds the outside of the adapter 2, and the glue limiting mechanism 5 is spaced apart from the outside of the adapter 2 to form a glue injection channel, and the glue injection hole 112 is connected to the glue injection channel, thereby improving the sealing of the glue injection and the heat dissipation effect of the adapter 2, and at the same time increasing the amount of glue injected.

[0144] The glue limiting mechanism 5 is adapted to be disposed between the cover body 11 and the supporting assembly 4 .

[0145] like Figure 6 As shown, one end of the glue limiting mechanism 5 is in close contact with the cover body 11, and the contact surface between the cover body 11 and the glue limiting mechanism 5 is sealed to prevent glue from flowing out of the contact surface; the other end of the glue limiting mechanism 5 is in contact with the support assembly 4, and the glue limiting mechanism 5 fixes the support assembly 4 to limit the displacement of the support assembly 4 in the length direction.

[0146] The two ends of the glue limiting mechanism 5 can be connected to the cover body 11 and the support assembly 4 by welding, mechanical connection or gluing.

[0147] Exemplarily, the glue limiting mechanism 5 may be made of metal, ceramic or plastic.

[0148] Among them, Figure 5 and Fig. 9 As shown, the cover body 11 is provided with an explosion-proof valve 113 , and the explosion-proof valve 113 is surrounded by the projection of the glue limiting mechanism 5 with the length direction of the adapter plate 2 as the projection direction.

[0149] In this embodiment, by providing a glue limiting mechanism 5, when the glue injection and potting process is performed after the pole core 200 is installed, the glue limiting mechanism 5 can limit the distribution area of ​​the glue, thereby reducing the risk of glue blocking the injection passage and the explosion-proof exhaust passage of the pole core 200, and can also increase the coverage rate of the potting glue on the contact area between the adapter 2, the cover plate body 11 and the seal 3, thereby improving the sealing effect and heat dissipation effect of the area.

[0150] In some embodiments, Figure 5 and Fig. 9 As shown, the cover body 11 is further provided with a liquid injection hole 114, and the liquid injection hole 114 is used for injecting liquid after the glue solidifies.

[0151] The glue injection hole 112 is located within the surrounding range of the glue limiting mechanism 5 , and the liquid injection hole 114 is located outside the surrounding range of the glue limiting mechanism 5 .

[0152] It should be noted that if Figure 2As shown, for a battery cell 1000 having a positive and negative electrode cover plate assembly 100, the glue injection hole 112 and the explosion-proof valve 113 can be placed on the cover plate body 11 of any cover plate assembly 100, and the glue injection hole does not affect the design of the explosion-proof valve 113 and the cover plate body 11, that is, the two cover plate assemblies 100 of the battery cell 1000 having positive and negative electrodes on both sides can both have designs such as the glue injection hole, the seal 3, the glue limiting mechanism 5, and the support assembly 4; as shown Figure 2 As shown, for a battery cell 1000 with both positive and negative electrodes on one side (such as a square shell electrode core), the battery cell 1000 includes only one cover plate assembly 100, and a glue limiting mechanism 5 can be provided to surround the positive and negative electrode adapter sheets 2 at the same time.

[0153] The installation steps of the battery cell 1000 provided in the embodiment of the present application are specifically as follows: first, the copper parts and aluminum parts of the negative electrode adapter 2 are connected together, and then the pole ear 201 is connected to one end of the adapter 2, the support assembly 4 is installed together with the adapter 2, and placed together in the shell 300 of the battery cell 1000, the cover body 11 is provided with an avoidance hole 111, the seal 3 is installed in the avoidance hole 111, and the glue limiting mechanism 5 is installed on the side of the cover body 11 close to the pole core 200, and then the cover assembly 100 is installed with the shell 300 of the pole core 200, the adapter 2 passes through the seal 3 in the avoidance hole 111 and extends out of the cover body 11, connecting the cover assembly 100 and the shell 300, and injecting the potting glue into the glue limiting mechanism 5 through the glue injection hole on the cover body 11, and after the glue is cured, the liquid injection and other processes are performed, and the entire battery cell 1000 is manufactured.

[0154] The present application also provides a battery cell 1000, such as Figure 1 As shown, it includes: a shell 300, a pole core 200 and a cover plate assembly 100 as in any of the above embodiments.

[0155] The pole core 200 is provided with a pole lug 201 . The pole lug 201 is a portion of the battery cell 1000 used for connecting to an external circuit and is usually located at the positive and negative ends of the pole core 200 .

[0156] The cover plate body 11 of the cover plate assembly 100 and the shell 300 form a receiving cavity, the pole core 200 is disposed in the receiving cavity, and the adapter plate 2 of the cover plate assembly 100 is connected to the pole ear 201 .

[0157] The tabs 201 include positive and negative electrodes, and the adapters 2 can be divided into positive and negative electrodes. The positive and negative adapters 2 are electrically connected to the positive and negative tabs 201 in a one-to-one correspondence. The positive and negative adapters 2 have the same size.

[0158] It should be noted that the pole core 200 may be an elongated blade pole core 200 , and in practical applications may also be a pole core 200 of other sizes, such as a square shell pole core 200 with a relatively close length and width.

[0159] According to the battery cell 1000 provided in the embodiment of the present application, a cover plate assembly 100 of any of the above-mentioned embodiments is provided. The cover plate assembly 100 is provided with a cover plate body 11 and an adapter plate 2. The adapter plate 2 is an integrated structure. The adapter plate 2 is inserted into the avoidance hole 111 of the cover plate body 11. The adapter plate 2 is respectively connected to the pole ear 201 and the adapter plate 2. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell 1000, and improving the current carrying capacity of the current carrying parts such as the adapter plate 2, thereby improving the high temperature resistance and excessive current performance of the battery cell 1000.

[0160] The specific manufacturing process of the above-mentioned battery cell 1000 is as follows: first, the produced pole core 200 and the pole ear 201 of the pole core 200 are connected to the adapter 2 by welding or the like, and then the support component 4 is connected to the adapter 2 and placed in the shell 300 to form a first assembly part; the seal 3 and the glue limiting mechanism 5 are installed on the cover body 11 to form a second assembly part; then the first assembly part and the second assembly part are assembled as a whole, that is, the adapter 2 and the seal 3 are installed together, all forming a whole, and then the cover body 11 and the shell 300 are connected by welding or the like, and the battery cell 1000 is installed; then, through the prefabricated glue injection hole on the cover body 11, glue is injected into the glue limiting mechanism 5 along the anti-gravity direction. Due to the glue injection in the anti-gravity direction, the glue will not overflow from the weight-reducing hole or the plug-in hole of the support component 4; the glue injection hole is sealed and the glue is allowed to solidify, and finally the liquid injection and other processes are performed. At this point, the battery cell 1000 is manufactured.

[0161] It should be noted that if Figure 7 As shown, for a battery cell 1000 with two end cover plate assemblies 100, the glue at one end needs to be cured before the glue injection at the other end. After the battery cell 1000 is manufactured, the positive and negative electrodes of adjacent battery cells 1000 are connected by connecting sheets 400 between the battery cells 1000 to achieve the purpose of grouping the battery cells 1000.

[0162] This example is a blade pole core 200 with cover plates at both ends, and it is also applicable to a pole core 200 with a cover plate at one end (such as a square shell pole core 200).

[0163] In some embodiments, the tab 201 is connected to the adapter plate 2 by lap welding, and the area where the tab 201 is welded to the adapter plate 2 is located between the first support member 41 and the second support member 42 of the cover plate assembly 100 .

[0164] The tab 201 and the adapter 2 can be connected by welding methods such as lap welding, for example, laser welding or ultrasonic welding. The electrical connection between the tab 201 and the adapter 2 is connected by welding, which can improve the connection effect of the electrical connection between the adapter 2 and the tab 201, improve the reliability of the connection, and reduce the connection resistance.

[0165] In some embodiments, the pole core 200 includes two pole cores 200 , which are arranged side by side, and the two pole ears 201 of the two pole cores 200 are respectively connected to the two sides of the adapter 2 .

[0166] The two tabs 201 can be connected to the two sides of the adapter 2 by lap welding.

[0167] The present application also provides a battery module, such as Figure 1 As shown, it includes a connecting piece 400 and at least two battery cells 1000 as any one of the above embodiments, and the adapter pieces 2 of two adjacent battery cells 1000 are connected through the connecting piece 400 .

[0168] In this embodiment, the adapter sheets 2 between different battery cells 1000 are connected by the connecting sheet 400 to achieve electrical connection between the battery cells 1000 to form a battery module and a battery pack.

[0169] The connecting pieces 400 between the battery cells 1000 and the adapter pieces 2 of the positive and negative electrodes of the battery cells 1000 can be connected by lap welding.

[0170] In some embodiments, the battery module further includes a tray, and at least two battery cells 1000 are disposed on the tray.

[0171] An embodiment of the present application also provides a battery pack, comprising a battery module as described in any of the above embodiments.

[0172] According to the battery pack provided in the embodiment of the present application, a battery module of any of the above-mentioned embodiments is provided, and the battery module has a cover assembly 100 of any of the above-mentioned embodiments. The cover assembly 100 is provided with a cover body 11 and an adapter plate 2, and the adapter plate 2 is an integrated structure. The adapter plate 2 is inserted into the avoidance hole 111 of the cover body 11, and the adapter plate 2 is respectively connected to the pole ear 201 and the adapter plate 2. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell 1000, and improving the current passing capacity of the current passing parts such as the adapter plate 2, thereby improving the high temperature resistance and excessive current performance of the battery cell 1000.

[0173] An embodiment of the present application also provides an electrical device, comprising a battery module as described in any of the above embodiments.

[0174] According to the electrical equipment provided in the embodiments of the present application, a battery module of any one of the above-mentioned embodiments is provided, and the battery module has a cover assembly 100 of any one of the above-mentioned embodiments. The cover assembly 100 is provided with a cover body 11 and an adapter plate 2, and the adapter plate 2 is an integrated structure. The adapter plate 2 is inserted into the avoidance hole 111 of the cover body 11, and the adapter plate 2 is respectively connected to the pole ear 201 and the adapter plate 2. Compared with the pole formed by splicing multiple sections in the related art, the structure and production cost of the pole are simplified, thereby simplifying the structure of the battery cell 1000, and improving the current carrying capacity of the current carrying parts such as the adapter plate 2, thereby improving the high temperature resistance and excessive current performance of the battery cell 1000.

[0175] 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.

[0176] 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.

[0177] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0178] In the description of the present application, “plurality” means two or more.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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: A cover plate body, wherein the cover plate body is provided with an avoidance hole; The adapter plate is passed through the avoidance hole, the portion of the adapter plate located on one side of the cover body is used to connect with the pole ear of the pole core, and the portion of the adapter plate located on the other side of the cover body is used to connect with the adapter plate of the adjacent battery cell.

2. The cover plate assembly according to claim 1, characterized in that: The adapter plate includes a first part and a second part connected in sequence, the first part has a first connecting section connected to the adapter plate of an adjacent battery cell, and the second part has a second connecting section for connecting to the pole lug of the pole core; the outer diameter of the first part is smaller than the outer diameter of the second part.

3. The cover plate assembly according to claim 2, characterized in that: The first part includes a first section and a second section connected to each other. The outer diameter of the first section is smaller than the outer diameter of the second section. The first section has the first connecting section. The end of the second section away from the first section is connected to the second part.

4. The cover plate assembly according to claim 2, characterized in that: The cover plate assembly further includes a sealing member, which is sandwiched between the adapter plate and the avoidance hole.

5. The cover plate assembly according to claim 4, characterized in that: The second part is provided with an annular groove, the annular groove is arranged opposite to the avoidance hole, and at least a part of the sealing element is located in the annular groove.

6. The cover plate assembly according to claim 4, characterized in that: The sealing member comprises a first sealing segment, a second sealing segment and a third sealing segment which are connected in sequence, wherein the second sealing segment is arranged between the adapter plate and the avoidance hole, and the first sealing segment and the third sealing segment are located on the side wall of the adapter plate.

7. The cover plate assembly according to any one of claims 2 to 6, characterized in that: The cover plate assembly further comprises a supporting assembly, and the supporting assembly is positioned and matched with the second part.

8. The cover plate assembly according to claim 7, characterized in that: The support assembly includes a first support member and a second support member, the first support member and the second support member are connected, the first support member and the second support member are combined to form a through hole, and the second part is penetrated through the through hole and the avoidance hole.

9. The cover plate assembly according to claim 8, characterized in that: The first supporting member is provided with a first connecting member, and the second supporting member is provided with a second connecting member plugged into the first connecting member; and / or, The support assembly is provided with a first plug-in connector, the second part is provided with a second plug-in connector plugged with the first plug-in connector, the first plug-in connector and the second plug-in connector are positioned and matched; and / or, An escape groove is provided at one end of the first support member and the second support member away from the cover plate body, and the escape groove is used to escape the tab; and / or, The support assembly is provided with a plurality of weight-reducing holes, and the plurality of weight-reducing holes are distributed at intervals along an extension direction of the support assembly.

10. The cover plate assembly according to claim 7, characterized in that: The cover plate body is provided with a glue injection hole; The cover assembly also includes a glue limiting mechanism, which is suitable for being arranged between the cover body and the support assembly, and the glue limiting mechanism surrounds the outer side of the adapter plate, and the glue limiting mechanism is separated from the outer side of the adapter plate to form a glue injection channel, and the glue injection hole is connected to the glue injection channel.

11. A battery cell, characterized in that: include: case; A pole core, wherein the pole core is provided with a pole ear; According to the cover plate assembly as described in any one of claims 1-10, the cover plate body of the cover plate assembly and the shell form a receiving cavity, the pole core is arranged in the receiving cavity, and the adapter plate of the cover plate assembly is connected to the pole ear.

12. The battery cell according to claim 11, characterized in that: The pole tab is connected to the adapter plate by lap welding, and the welding area between the pole tab and the adapter plate is located between the first support member and the second support member of the cover plate assembly.

13. The battery cell according to claim 12, characterized in that: The pole cores include two, and the two pole ears of the two pole cores are respectively connected to the two sides of the adapter plate by lap welding.

14. A battery module, characterized in that: It comprises a connecting piece and at least two battery cells according to any one of claims 11 to 13, wherein the connecting pieces of two adjacent battery cells are connected via the adapter piece.

15. The battery module according to claim 14, characterized in that: The battery module further includes a tray, and at least two of the battery cells are disposed on the tray.

16. A battery pack, characterized in that: Comprising a battery module as claimed in claim 14 or 15.

17. An electrical equipment, characterized in that: Comprising the battery module as claimed in claim 14 or 15.

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