Cover plate assembly, battery, battery device and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and relates to a cover plate assembly, a battery, a battery device and electric equipment. The cover plate assembly comprises an electric connecting piece, a first insulating piece, a cover plate and a second insulating piece which are sequentially stacked, a first anti-rotation structure is arranged between the electric connecting piece and the first insulating piece, and a second anti-rotation structure is arranged between the first insulating piece and the cover plate. And a third anti-rotation structure is arranged between the cover plate and the second insulating part. The cover plate assembly can effectively prevent relative rotation between the two adjacent structural parts, and then anti-rotation positioning of all the structural parts is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a cover plate assembly, a battery, a battery device and electrical equipment. Background Art

[0002] The cylindrical battery is mainly composed of pole core, positive and negative cover plate assembly, sealing nail, sealing cover and shell. Among them, the cover plate assembly mainly includes pole column, aluminum block, current collector, first insulating member, second insulating member and sealing member. During assembly, one end of the pole column is conductively connected to the current collector, and the other end of the pole column passes through the second insulating member, cover plate, first insulating member and electrical connector in turn to realize the connection between the pole column and other structural parts to lead out the electrode.

[0003] However, in the existing cover plate assembly, the second insulating member, the cover plate, the first insulating member and the aluminum block are generally simply stacked, and relative rotation is likely to occur between two adjacent structural members, thereby affecting the sealing and strength of the cover plate assembly. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide a cover plate assembly, a battery, a battery device and an electric device in view of the technical problem that two adjacent structural parts in the existing cover plate assembly are prone to relative rotation.

[0005] In order to solve the above technical problems, on the one hand, an embodiment of the utility model provides a cover plate assembly, including an electrical connector, a first insulating member, a cover plate and a second insulating member stacked in sequence, a first anti-rotation structure is arranged between the electrical connector and the first insulating member, a second anti-rotation structure is arranged between the first insulating member and the cover plate, and a third anti-rotation structure is arranged between the cover plate and the second insulating member.

[0006] According to the cover plate assembly of the embodiment of the utility model, an anti-rotation structure is respectively provided between the electrical connector and the first insulating member, between the first insulating member and the cover plate, and between the cover plate and the second insulating member, thereby effectively preventing relative rotation between two adjacent structural members, thereby achieving anti-rotation positioning of each structural member.

[0007] Optionally, a first limiting groove is provided on a side of the electrical connector facing the first insulating member, and a first limiting boss is provided on a side of the first insulating member facing the electrical connector;

[0008] The first limiting groove and the first limiting boss are limitedly matched to form the first anti-rotation structure.

[0009] Optionally, a first embedded groove is further provided on a side of the first insulating member facing the electrical connector, and the electrical connector is embedded in the first embedded groove;

[0010] The first limiting boss is arranged at the edge of the first embedded groove.

[0011] Optionally, a second limiting boss is provided on the first insulating member, and a second limiting groove is provided on a side of the cover plate facing the first insulating member;

[0012] The second limiting groove and the second limiting boss are limitedly matched to form the second anti-rotation structure.

[0013] Optionally, the second limiting boss is arranged on the outer edge of the first insulating member;

[0014] The cover plate is also provided with a second embedded groove connected with the second limiting groove, the second limiting groove is arranged on the outer periphery of the second embedded groove, the first insulating member is arranged in the second embedded groove, and the second limiting boss is arranged in the second limiting groove.

[0015] Optionally, the cross section of the first insulating member is circular, the cross sections of the second limiting boss and the second limiting groove are both fan-shaped and are coaxially arranged with the first insulating member, and the outer diameter D8 of the first insulating member, the outer diameter R1 of the second limiting boss and the outer diameter R2 of the second limiting groove satisfy: D8<R1<1.3D8, R1≤R2≤1.1R1;

[0016] And / or, the curvature r1 of the second limiting boss and the curvature r2 of the second limiting groove satisfy: 24°<r1<60°, r1≤r2≤1.1r1.

[0017] Optionally, a third limiting boss is provided on a side of the cover plate facing the second insulating member, and a third limiting groove is provided on a side of the second insulating member facing the cover plate;

[0018] The third limiting groove and the third limiting boss are limitedly matched to form the third anti-rotation structure.

[0019] Optionally, the third limiting boss includes a boss body and a limiting portion, the limiting portion is arranged at the outer edge of the boss body, the third limiting groove includes a third embedded groove and a limiting groove, the limiting groove is connected to the third embedded groove and is arranged on the outer periphery of the third embedded groove, the boss body is arranged in the third embedded groove, and the limiting portion is arranged in the limiting groove.

[0020] Optionally, the radial cross-section of the cover plate is annular, the radial cross-section of the second insulating member is annular and is coaxially arranged with the cover plate, the radial cross-sections of the boss body and the third embedded groove are circular and are coaxially arranged with the cover plate, and the radial cross-sections of the limiting portion and the limiting groove are annular and fan-shaped and are coaxially arranged with the cover plate;

[0021] The diameter D11 of the boss body and the diameter D12 of the third embedded groove satisfy: D11≤D12≤1.1D11;

[0022] And / or, the outer diameter R3 of the limiting portion and the outer diameter R4 of the limiting groove satisfy: R3≤R4≤1.1R3;

[0023] And / or, the curvature r3 of the limiting portion and the curvature r4 of the limiting groove satisfy: r3≤r4≤1.1r3.

[0024] Optionally, the cover plate assembly also includes a pole, which is arranged to pass through the second insulating member, the cover plate, the first insulating member and the electrical connector in sequence, and a flange is provided at one end of the pole away from the second insulating member, and the flange abuts against a side of the electrical connector away from the second insulating member.

[0025] Optionally, the axial cross-section of the pole is circular;

[0026] The pole comprises a first pole segment, a second pole segment and a third pole segment connected in sequence, and the radial diameter D2 of the first pole segment, the radial diameter D1 of the second pole segment and the radial diameter D3 of the third pole segment satisfy: D2>D1>D3;

[0027] One end of the third column segment away from the first column segment is turned outward along the radial direction of the pole to form the flange.

[0028] Optionally, a fourth embedded groove is formed on a side of the electrical connector facing away from the second insulating member, and the flange is embedded in the fourth embedded groove.

[0029] Optionally, the cover plate assembly further comprises a sealing member, wherein the sealing member is sleeved on the pole, and the sealing member is located on a side of the cover plate facing the second insulating member;

[0030] The sealing member is sealingly connected between the pole, the first insulating member and the cover plate.

[0031] Optionally, the seal is capable of being compressed;

[0032] The compression rate α of the seal satisfies: α=(h1-h2) / h1, and 15%<α<50%; wherein h1 is the height of the seal before compression, and h2 is the height of the seal after compression.

[0033] Optionally, a first exhaust groove is provided on the first insulating member, and the first exhaust groove is connected to the sealing member.

[0034] Optionally, the first exhaust groove is arranged on a side of the first insulating member facing the electrical connector, a first gap is formed between the first insulating member and the pole, and the first exhaust groove is connected to the first gap.

[0035] Optionally, a second exhaust groove is provided on the second insulating member, and the second exhaust groove is connected to the sealing member.

[0036] Optionally, an annular boss is formed on the edge of the inner hole of the second insulating member, and the second exhaust groove is provided on the annular boss.

[0037] Optionally, the cap plate assembly further includes a current collector, the current collector is provided with a first welding area and a second welding area, the pole is welded to the first welding area, and the second welding area is used to be welded to the pole core of the battery;

[0038] The second insulating member is located between the cover plate and the current collecting member.

[0039] On the other hand, an embodiment of the present invention provides a battery, which includes the above-mentioned cover plate assembly.

[0040] On the other hand, an embodiment of the present invention provides a battery device, which includes the above-mentioned cover plate assembly.

[0041] On the other hand, an embodiment of the utility model provides an electrical device, which includes the above-mentioned cover plate assembly or the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of a cover plate assembly provided by an embodiment of the utility model;

[0043] Figure 2 yes Figure 1 Schematic diagram of the middle pole;

[0044] Figure 3 yes Figure 1 Schematic diagram of the CEC connector;

[0045] Figure 4 yes Figure 1 A schematic diagram of a first insulating member;

[0046] Figure 5 yes Figure 1 Schematic diagram of the middle cover;

[0047] Figure 6 yes Figure 5 A schematic diagram of the middle cover from another angle;

[0048] Figure 7 yes Figure 1 A schematic diagram of a second insulating member;

[0049] Figure 8 yes Figure 7 A schematic diagram of another angle of the second insulating member;

[0050] Fig. 9 yes Figure 1 Schematic diagram of the middle seal before compression;

[0051] Fig.10 yes Figure 1 Schematic diagram of the middle seal after compression;

[0052] Fig.11 yes Figure 1 Schematic diagram of the middle current collector;

[0053] Fig.12 It is a cross-sectional view of a cover plate assembly provided in one embodiment of the utility model.

[0054] The reference numerals in the specification are as follows:

[0055] 1. electrical connector; 11. first limiting groove; 12. fourth embedded groove;

[0056] 2. first insulating member; 21. first limiting boss; 22. first embedded groove; 23. second limiting boss; 24. first exhaust groove;

[0057] 3. Cover plate; 31. Second limiting groove; 32. Third limiting boss; 321. Boss body; 322. Limiting portion; 33. Second embedded groove;

[0058] 4. second insulating member; 41. third limiting groove; 411. third embedded groove; 412. limiting groove; 42. second exhaust groove; 43. annular boss;

[0059] 5. Pole; 50. Flanging; 51. First column section; 52. Second column section; 53. Third column section;

[0060] 6. Seals;

[0061] 7. Current collecting part; 71. Second welding area; 711. Exhaust through hole; 72. First welding area. DETAILED DESCRIPTION

[0062] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0063] like Figures 1 to 12 As shown, the cover plate assembly provided by the embodiment of the utility model includes an electrical connector 1, a first insulating member 2, a cover plate 3 and a second insulating member 4 stacked in sequence, a first anti-rotation structure is arranged between the electrical connector 1 and the first insulating member 2, a second anti-rotation structure is arranged between the first insulating member 2 and the cover plate 3, and a third anti-rotation structure is arranged between the cover plate 3 and the second insulating member 4.

[0064] The cover plate assembly provided in the embodiment of the utility model can effectively prevent relative rotation between two adjacent structural members by respectively arranging an anti-rotation structure between the electrical connector 1 and the first insulating member 2, between the first insulating member 2 and the cover plate 3, and between the cover plate 3 and the second insulating member 4, thereby achieving anti-rotation positioning of each structural member.

[0065] In one embodiment, the electrical connector 1 is an aluminum block to achieve its conductive function.

[0066] In one embodiment, the anti-rotation structure includes a matching limiting boss and a limiting groove, and the anti-rotation positioning between two adjacent structural members is achieved through the plug-in cooperation between the limiting boss and the limiting groove.

[0067] In one embodiment, if Figure 1 , Figure 2 and Fig.12 As shown, the cover plate assembly also includes a pole 5, which is sequentially arranged through the second insulating member 4, the cover plate 3, the first insulating member 2 and the electrical connector 1, and a flange 50 is provided at one end of the pole 5 away from the second insulating member 4, and the flange 50 abuts against a side of the electrical connector 1 away from the second insulating member 4.

[0068] By passing the pole 5 through various structural members and forming a flange 50 at the end of the pole 5 , various structural members and the pole 5 can be fixed to prevent the pole 5 from loosening.

[0069] In one embodiment, if Figure 1 and Figure 2 As shown, the axial cross section of the pole 5 is circular.

[0070] The pole 5 includes a first pole segment 51, a second pole segment 52 and a third pole segment 53 connected in sequence, and the radial diameter D2 of the first pole segment 51, the radial diameter D1 of the second pole segment 52 and the radial diameter D3 of the third pole segment 53 satisfy: D2>D1>D3.

[0071] The third column segment 53 is sequentially arranged through the second insulating member 4 , the cover plate 3 , the first insulating member 2 and the electrical connector 1 , and one end of the third column segment 53 away from the first column segment 51 is turned outward along the radial direction of the pole 5 to form the flange 50 .

[0072] It can be understood that the pole 5 is a three-section structure when not assembled. After the third column segment 53 of the pole 5 passes through each structural component in turn, the end of the third column segment 53 away from the first column segment 51 can be pressed down to be turned outward along the radial direction of the pole 5 to form the flange 50, thereby fixing each structural component to the pole 5.

[0073] In one embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, a first limiting groove 11 is provided on a side of the electrical connector 1 facing the first insulating member 2 , and a first limiting boss 21 is provided on a side of the first insulating member 2 facing the electrical connector 1 .

[0074] The first limiting groove 11 and the first limiting boss 21 are limitedly matched to form the first anti-rotation structure, thereby realizing the anti-rotation positioning between the electrical connector 1 and the first insulating member 2 .

[0075] In other embodiments not shown in the figures, a limiting boss may be provided on the side of the electrical connector facing the first insulating member, and a limiting groove may be provided on the side of the first insulating member facing the electrical connector to achieve anti-rotation positioning between the electrical connector and the first insulating member.

[0076] In one embodiment, if Figure 3 and Figure 4 As shown, the cross section of the first limiting groove 11 along the radial direction of the cover plate assembly is roughly rectangular, and the length d1 of the first limiting groove 11 and the width d2 of the first limiting groove 11 satisfy: 1mm≤d1≤d2≤1 / 4D1, so as to ensure that the first limiting groove 11 does not affect the subsequent welding of the electrical connector 1 and the connecting piece, and has a good anti-rotation effect. If the size of the first limiting groove 11 is too large, the thickness of the position corresponding to the first limiting groove 11 on the electrical connector 1 will be thin, and it is easy to be welded through when welding with the connecting piece.

[0077] The radial cross-section of the first limiting boss 21 along the cover plate assembly is roughly rectangular, and the width d5 ​​of the first limiting boss 21, the length d6 of the first limiting boss 21 and the outer diameter D8 of the first insulating member 2 satisfy: d5<d2, d6<d1, 0.8mm≤d6≤d5<1 / 4D8, so as to ensure the plug-in fit between the first limiting boss 21 and the first limiting groove 11, so as to achieve a good anti-rotation effect.

[0078] In one embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, the first insulating member 2 is further provided with a first embedded groove 22 on one side facing the electrical connector 1 , and the electrical connector 1 is embedded in the first embedded groove 22 . The first limiting boss 21 is provided at the edge of the first embedded groove 22 .

[0079] By partially embedding the electrical connector 1 in the first embedded groove 22 , the anti-rotation positioning between the electrical connector 1 and the first insulating member 2 can be better achieved.

[0080] In one embodiment, if Figure 1 , Figure 3 and Figure 4 As shown, there are a plurality of first limiting bosses 21, which are arranged at intervals on the circumferential edge of the first embedded groove 22. There are a plurality of first limiting grooves 22, which are matched with each other in a one-to-one manner to enhance the anti-rotation positioning effect.

[0081] In one embodiment, if Figure 3 and Figure 4 As shown, the radial cross-section of the electrical connector 1 is annular, the radial cross-section of the first embedded groove 22 is annular, and the outer diameter D4 of the electrical connector 1, the inner diameter D6 of the first embedded groove 22 and the outer diameter D8 of the first insulating member 2 satisfy: D4≤D6<D8, so as to ensure that the first insulating member 2 and the electrical connector 1 cooperate well.

[0082] In one embodiment, if Figure 1 , Figure 4 and Figure 5 As shown, a second limiting boss 23 is provided on the first insulating member 2 , and a second limiting groove 31 is provided on a side of the cover plate 3 facing the first insulating member 2 .

[0083] The second limiting groove 31 is limitedly matched with the second limiting boss 23 , and the second anti-rotation structure is used to realize the anti-rotation positioning between the first insulating member 2 and the cover plate 3 .

[0084] In one embodiment, if Figure 1 , Figure 4 and Figure 5 As shown, the second limiting boss 23 is arranged at the outer edge of the first insulating member 2. The cover plate 3 is also provided with a second embedded groove 33 communicating with the second limiting groove 31, the second limiting groove 31 is arranged at the outer periphery of the second embedded groove 33, the first insulating member 2 is arranged in the second embedded groove 33, and the second limiting boss 23 is arranged in the second limiting groove 31, so as to realize the anti-rotation positioning between the first insulating member 2 and the cover plate 3.

[0085] In one embodiment, if Figure 1 , Figure 4 and Figure 5 As shown, a plurality of second limiting bosses 23 are provided, and a plurality of second limiting bosses 23 are spaced apart on the circumferential edge of the first insulating member 2; a plurality of second limiting grooves 31 are provided, and a plurality of second limiting grooves 31 are spaced apart on the outer periphery of the second embedded groove 33; and a plurality of second limiting bosses 23 and a plurality of second limiting grooves 31 are limitedly matched one by one to enhance the anti-rotation positioning effect.

[0086] In one embodiment, if Figure 4 and Figure 5 As shown, the cross-section of the first insulating member 2 is circular, the cross-sections of the second limiting boss 23 and the second limiting groove 31 are both fan-shaped and coaxially arranged with the first insulating member 2, the radial cross-section of the first insulating member 2 is circular, and the outer circumferential diameter D8 of the first insulating member 2, the outer circumferential diameter R1 of the second limiting boss 23 and the outer circumferential diameter R2 of the second limiting groove 31 satisfy: D8<R1<1.3D8, R1≤R2≤1.1R1.

[0087] The curvature r1 of the second limiting boss 23 and the curvature r2 of the second limiting groove 31 satisfy: 24°<r1<60°, r1≤r2≤1.1r1, so as to ensure that the second limiting groove 31 of the cover plate 3 and the second limiting boss 23 of the first insulating member 2 cooperate to prevent rotation.

[0088] In one embodiment, if Figure 4 and Figure 5 As shown, the inner diameter D10 of the second limiting groove 31 satisfies: D8≤D10, so that the cover plate 3 and the first insulating member 2 are matched.

[0089] In one embodiment, if Figure 1 , Figure 6 and Figure 7As shown, a third limiting boss 32 is provided on a side of the cover plate 3 facing the second insulating member 4 , and a third limiting groove 41 is provided on a side of the second insulating member 4 facing the cover plate 3 .

[0090] The third limiting groove 41 is limitedly matched with the third limiting boss 32 to form the third anti-rotation structure, thereby realizing the anti-rotation positioning between the cover plate 3 and the second insulating member 4 .

[0091] In one embodiment, if Figure 6 and Figure 7 As shown, the third limiting boss 32 includes a boss body 321 and a limiting portion 322, the limiting portion 322 is arranged on the outer edge of the boss body 321, the third limiting groove 41 includes a third embedded groove 411 and a limiting groove 412, the limiting groove 412 is connected to the third embedded groove 411 and is arranged on the outer periphery of the third embedded groove 411, the boss body 321 is arranged in the third embedded groove 411, and the limiting portion 322 is arranged in the limiting groove 412.

[0092] In one embodiment, if Figure 6 and Figure 7 As shown, there are multiple limiting portions 322, and the multiple limiting portions 322 are spaced apart on the circumferential edge of the boss body 321; there are multiple limiting grooves 412, and the multiple limiting grooves 412 are spaced apart on the outer periphery of the third embedded groove 411; the multiple limiting portions 322 correspond one-to-one with the multiple limiting grooves 412 for limiting cooperation to enhance the anti-rotation positioning effect.

[0093] In one embodiment, if Figure 6 and Figure 7 As shown, the radial cross section of the cover plate 3 is annular, the radial cross section of the second insulating member 4 is annular and is coaxially arranged with the cover plate 3, the radial cross sections of the boss body 321 and the third embedded groove 411 are circular and are coaxially arranged with the cover plate 3, and the radial cross sections of the limiting portion 322 and the limiting groove 412 are annular and fan-shaped and are coaxially arranged with the cover plate 3. The diameter D11 of the boss body 321 and the diameter D12 of the third embedded groove 411 satisfy: D11≤D12≤1.1D11.

[0094] The outer diameter R3 of the limiting portion 322 and the outer diameter R4 of the limiting groove 412 satisfy: R3≤R4≤1.1R3. The curvature r3 of the limiting portion 322 and the curvature r4 of the limiting groove 412 satisfy: r3≤r4≤1.1r3, so as to ensure good fit between the second insulating member 4 and the cover plate 3.

[0095] In one embodiment, if Figures 2 to 5As shown, the inner hole diameter D5 of the electrical connector 1 satisfies: D3≤D5≤1.1D3, so that the electrical connector 1 can cooperate well with the pole 5.

[0096] The inner hole diameter D7 of the first insulating member 2 satisfies: D1≤D7<D2, so that the pole 5 and the first insulating member 2 cooperate well.

[0097] The inner hole diameter D9 of the cover plate 3 satisfies: D1≤D9<D2, so that the pole 5 and the cover plate 3 are well matched.

[0098] In one embodiment, if Figure 1 As shown, a fourth embedded groove 12 is formed on the side of the electrical connector 1 facing away from the second insulating member 4, and the flange 50 is embedded in the fourth embedded groove 12 to ensure that there is an embedded step as a supporting surface when the electrical connector 1 is welded to the pole 5, thereby improving the welding yield.

[0099] In one embodiment, if Figure 1 and Fig.12 As shown, the cover plate assembly further includes a seal 6, which is sleeved on the pole 5, and the seal 6 is located on the side of the cover plate 3 facing the second insulating member 4. The seal 6 is sealed and connected between the pole 5, the first insulating member 2 and the cover plate 3. Specifically, the seal 6 can be sealed and connected between the first column section 51 of the pole 5 and the cover plate 3.

[0100] The seal 6 is made of elastic insulating material, which ensures its sealing and insulating function through compression and can provide resilience after riveting. In addition, the seal 6 can also be used to prevent the electrolyte inside the cover assembly from leaking.

[0101] In one embodiment, if Fig. 9 and Fig.10 As shown, the seal 6 can be compressed.

[0102] The inner diameter and volume of the seal 6 remain unchanged before and after compression, and the inner hole diameter D14 of the seal 6 before compression and the inner hole diameter D16 of the seal 6 after compression satisfy: D14 = D16. The volume V1 of the seal 6 before compression and the volume V2 of the seal 6 after compression satisfy: V1 = V2.

[0103] The compression rate α of the seal 6 satisfies: α=(h1-h2) / h1, and 15%<α<50%. Wherein, h1 is the height of the seal 6 before compression, and h2 is the height of the seal 6 after compression. When the compression rate α is between 15% and 50%, a better sealing effect can be ensured.

[0104] After calculation, the outer diameter D17 of the compressed seal 6 satisfies: And 6mm<D17<20mm. Wherein, V1 is the volume of the seal 6 before compression, and π is the pi. The outer diameter D17 of the seal 6 after compression is in the range of 6mm-20mm, which can ensure the effective sealing of the seal 6 between the pole 5, the first insulating member 2 and the cover plate 3, and achieve a better sealing effect.

[0105] In one embodiment, if Figure 8 , Fig.10 and Fig.12 As shown, the second insulating member 4 is sleeved on the sealing member 6. To ensure that there is no assembly interference between the second insulating member 4 and the sealing member 6, the inner hole diameter D13 of the second insulating member 4 satisfies: D13>D17.

[0106] In one embodiment, if Figure 1 As shown, a first exhaust groove 24 is provided on the first insulating member 2 , and the first exhaust groove 24 is connected to the sealing member 6 .

[0107] After the cover plate assembly is assembled, the seal 6 is sometimes easily missing due to its small size. When the first exhaust groove 24 is not provided, it is difficult to detect the existence of the seal 6 by helium detection. If the seal 6 is not installed in the cover plate assembly, the connection between the structural parts may become loose after long-term use. By providing the first exhaust groove 24, it is possible to directly detect whether the seal 6 is installed by helium detection. If it is installed, there is no leakage. If it is not installed, there is gas leakage during helium detection.

[0108] In one embodiment, if Figure 1 As shown, the first exhaust groove 24 is arranged on the side of the first insulating member 2 facing the electrical connector 1, and a first gap is formed between the first insulating member 2 and the pole 5. The first exhaust groove 24 is connected to the first gap, so that the gas in the first exhaust groove 24 can flow to the sealing member 6, thereby realizing the detection of the sealing member 6.

[0109] In one embodiment, if Figure 4 As shown, the first exhaust groove 24 extends along the radial direction of the first insulating member 2, and the radial cross-section of the first exhaust groove 24 along the cover plate assembly is rectangular, and the length d3 of the first exhaust groove 24 satisfies: d3<1 / 2D6. The width d4 of the first exhaust groove 24 satisfies: 1mm<d4<3mm. If the size of the first exhaust groove 24 is large, there will be certain risks even with the presence of the sealing member 6, and tilting may occur during assembly. Therefore, the size of the first exhaust groove 24 should be as small as possible, so that safety can be ensured and the presence of the first exhaust groove 24 can be avoided to affect assembly.

[0110] In one embodiment, if Figure 4 As shown, a plurality of first exhaust grooves 24 are provided, and the plurality of first exhaust grooves 24 are arranged at equal intervals along the circumferential direction of the first insulating member 2 .

[0111] In one embodiment, if Figure 8 As shown, a second exhaust groove 42 is provided on the second insulating member 4 , and the second exhaust groove 42 is connected to the sealing member 6 .

[0112] After the cover plate assembly is assembled, the seal 6 is sometimes easily missing due to its small size. When the second exhaust groove 42 is not provided, it is difficult to detect the existence of the seal 6 by helium detection. If the seal 6 is not installed in the cover plate assembly, the connection between the structural parts may become loose after long-term use. By providing the second exhaust groove 42, it is possible to directly detect whether the seal 6 is installed by helium detection. If it is installed, there is no leakage. If it is not installed, there is gas leakage during helium detection.

[0113] In one embodiment, if Figure 8 As shown, an annular boss 43 is formed at the edge of the inner hole of the second insulating member 4 , and the second exhaust groove 42 is provided on the annular boss 43 , thereby forming the second insulating member 4 .

[0114] In one embodiment, if Figure 8 As shown, the second insulating member 4 is sleeved on the sealing member 6 , and a second gap is formed between the second insulating member 4 and the sealing member 6 .

[0115] The second exhaust groove 42 is communicated with the second gap, so that the gas in the second exhaust groove 42 can flow to the sealing member 6 to implement detection of the sealing member 6 .

[0116] In one embodiment, if Figure 8 As shown, the radial cross-section of the second exhaust groove 42 along the cover plate assembly is rectangular, and the width d7 of the second exhaust groove 42 and the length d8 of the second exhaust groove 42 satisfy: 2mm≤d7≤4mm, 1mm≤d8≤3mm, to ensure that gas can flow through the second exhaust groove 42.

[0117] In one embodiment, if Figure 4 As shown, a plurality of second exhaust grooves 42 are provided, and the plurality of second exhaust grooves 42 are arranged at equal intervals along the circumferential direction of the second insulating member 4 .

[0118] In one embodiment, if Figure 1 , Fig.11 and Fig.12As shown, the cover plate assembly also includes a current collector 7, which is a flat sheet structure. The current collector 7 is provided with a second welding area 71 and a first welding area 72. The second welding area 71 is designed with a large number of exhaust holes 711 to ensure that the gas produced by the cover plate assembly can be discharged smoothly. The pole 5 is connected to the first welding area 72 by a welding process, and the second welding area 71 is used for welding with the pole core of the battery.

[0119] The second insulating member 4 is located on a side of the electrical connector 1 facing the current collecting member 7 .

[0120] At this time, the current collecting member 7 , the pole 5 and the electrical connector 1 are connected, and serve as a conductive component to lead the pole core current to the electrical connector 1 .

[0121] In one embodiment, the first insulating member 2 and the second insulating member 4 are made of insulating polymer materials, the first insulating member 2 is used to insulate the cover plate 3 from the electrical connector 1 , and the second insulating member 4 is used to insulate the current collecting member 7 from the cover plate 3 .

[0122] In one embodiment, if Fig.11 As shown, the welding area 72 is in a circular ring shape.

[0123] The inner hole diameter D18 of the welding area 72 and the outer circumferential diameter D19 of the welding area 72 satisfy: 0<D18<D19<30mm.

[0124] The area S of the welding region 72 satisfies: This is to better achieve welding between the current collecting member 7 and the pole 5 .

[0125] The flow requirement C of the cover plate assembly satisfies: C=NKS, wherein N is the compensation coefficient, N=effective welding area / theoretical welding area, with an empirical value of 0.7 to 1, and K is the flow coefficient of the material, which is determined according to the material type.

[0126] The cover plate assembly provided by the embodiment of the utility model has excellent sealing performance, good anti-rotation capability, and good electrical conductivity and transmission capability. At the same time, the various structural parts are closely matched, the structural strength is high, and the reliability is good.

[0127] The battery provided by the embodiment of the utility model includes the above-mentioned cover plate assembly.

[0128] In one embodiment, the battery is a cylindrical battery. In this case, the electrical connector 1, the first insulating member 2, the cover plate 3, and the second insulating member 4 are all circular and coaxially arranged.

[0129] In other embodiments, the battery may also be a square battery.

[0130] The battery device provided by the embodiment of the utility model includes the above-mentioned cover plate assembly.

[0131] In one embodiment, the battery device is a battery pack or an energy storage cabinet.

[0132] The electrical equipment provided by the embodiment of the utility model includes the above-mentioned cover plate assembly or the above-mentioned battery device.

[0133] In one embodiment, the vehicle, ship, aircraft or computer, etc.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover plate assembly, characterized in that: It includes an electrical connector, a first insulating member, a cover plate and a second insulating member stacked in sequence, a first anti-rotation structure is arranged between the electrical connector and the first insulating member, a second anti-rotation structure is arranged between the first insulating member and the cover plate, and a third anti-rotation structure is arranged between the cover plate and the second insulating member.

2. The cover plate assembly according to claim 1, characterized in that: A first limiting groove is provided on a side of the electrical connector facing the first insulating member, and a first limiting boss is provided on a side of the first insulating member facing the electrical connector; The first limiting groove and the first limiting boss are limitedly matched to form the first anti-rotation structure.

3. The cover plate assembly according to claim 2, characterized in that: A first embedded groove is further provided on a side of the first insulating member facing the electrical connector, and the electrical connector is embedded in the first embedded groove; The first limiting boss is arranged at the edge of the first embedded groove.

4. The cover plate assembly according to claim 1, characterized in that: A second limiting boss is provided on the first insulating member, and a second limiting groove is provided on a side of the cover plate facing the first insulating member; The second limiting groove and the second limiting boss are limitedly matched to form the second anti-rotation structure.

5. The cover plate assembly according to claim 4, characterized in that: The second limiting boss is arranged at the outer edge of the first insulating member; The cover plate is also provided with a second embedded groove connected with the second limiting groove, the second limiting groove is arranged on the outer periphery of the second embedded groove, the first insulating member is arranged in the second embedded groove, and the second limiting boss is arranged in the second limiting groove.

6. The cover plate assembly according to claim 4, characterized in that: The cross section of the first insulating member is circular, the cross sections of the second limiting boss and the second limiting groove are both fan-shaped and are coaxially arranged with the first insulating member, and the outer diameter D8 of the first insulating member, the outer diameter R1 of the second limiting boss and the outer diameter R2 of the second limiting groove satisfy: D8<R1<1.3D8, R1≤R2≤1.1R1; And / or, the curvature r1 of the second limiting boss and the curvature r2 of the second limiting groove satisfy: 24°<r1<60°, r1≤r2≤1.1r1.

7. The cover plate assembly according to claim 1, characterized in that: A third limiting boss is provided on one side of the cover plate facing the second insulating member, and a third limiting groove is provided on one side of the second insulating member facing the cover plate; The third limiting groove and the third limiting boss are limitedly matched to form the third anti-rotation structure.

8. The cover plate assembly according to claim 7, characterized in that: The third limiting boss includes a boss body and a limiting portion, the limiting portion is arranged on the outer edge of the boss body, the third limiting groove includes a third embedded groove and a limiting groove, the limiting groove is connected to the third embedded groove and is arranged on the outer periphery of the third embedded groove, the boss body is arranged in the third embedded groove, and the limiting portion is arranged in the limiting groove.

9. The cover plate assembly according to claim 8, characterized in that: The radial cross section of the cover plate is annular, the radial cross section of the second insulating member is annular and is coaxially arranged with the cover plate, the radial cross sections of the boss body and the third embedded groove are circular and are coaxially arranged with the cover plate, and the radial cross sections of the limiting portion and the limiting groove are annular and fan-shaped and are coaxially arranged with the cover plate; The diameter D11 of the boss body and the diameter D12 of the third embedded groove satisfy: D11≤D12≤1.1D11; And / or, the outer diameter R3 of the limiting portion and the outer diameter R4 of the limiting groove satisfy: R3≤R4≤1.1R3; And / or, the curvature r3 of the limiting portion and the curvature r4 of the limiting groove satisfy: r3≤r4≤1.1r3.

10. The cover plate assembly according to any one of claims 1 to 9, characterized in that: The cover plate assembly also includes a pole, which is sequentially arranged through the second insulating member, the cover plate, the first insulating member and the electrical connector. An end of the pole away from the second insulating member is provided with a flange, and the flange abuts against a side of the electrical connector away from the second insulating member.

11. The cover plate assembly according to claim 10, characterized in that: The axial cross section of the pole is circular; The pole comprises a first pole segment, a second pole segment and a third pole segment connected in sequence, and the radial diameter D2 of the first pole segment, the radial diameter D1 of the second pole segment and the radial diameter D3 of the third pole segment satisfy: D2>D1>D3; One end of the third column segment away from the first column segment is turned outward along the radial direction of the pole to form the flange.

12. The cover plate assembly according to claim 10, characterized in that: A fourth embedded groove is formed on a side of the electrical connector facing away from the second insulating member, and the flange is embedded in the fourth embedded groove.

13. The cover plate assembly according to claim 10, characterized in that: The cover plate assembly further includes a sealing member, which is sleeved on the pole and located on a side of the cover plate facing the second insulating member; The sealing member is sealingly connected between the pole, the first insulating member and the cover plate.

14. The cover plate assembly according to claim 13, characterized in that: The seal is capable of being compressed; The compression rate α of the seal satisfies: α=(h1-h2) / h1, and 15%<α<50%; wherein h1 is the height of the seal before compression, and h2 is the height of the seal after compression.

15. The cover plate assembly according to claim 13, characterized in that: The first insulating member is provided with a first exhaust groove, and the first exhaust groove is connected to the sealing member.

16. The cover plate assembly according to claim 15, characterized in that: The first exhaust groove is arranged on a side of the first insulating member facing the electrical connector, a first gap is formed between the first insulating member and the pole, and the first exhaust groove is communicated with the first gap.

17. The cover plate assembly according to claim 13, characterized in that: The second insulating member is provided with a second exhaust groove, and the second exhaust groove is connected to the sealing member.

18. The cover plate assembly according to claim 17, characterized in that: An annular boss is formed at the edge of the inner hole of the second insulating member, and the second exhaust groove is arranged on the annular boss.

19. The cover plate assembly according to claim 10, characterized in that: The cap plate assembly further includes a current collector, the current collector is provided with a first welding area and a second welding area, the pole is welded to the first welding area, and the second welding area is used to be welded to the pole core of the battery; The second insulating member is located between the cover plate and the current collecting member.

20. A battery, characterized in that: A cover plate assembly comprising any one of claims 1-19.

21. A battery device, characterized in that: A cover plate assembly comprising any one of claims 1 to 19, or a battery comprising claim 20.

22. An electrical equipment, characterized in that: Includes the cover plate assembly according to any one of claims 1 to 19, or includes the battery according to claim 20, or includes the battery device according to claim 21.

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