Pole structure, top cover assembly, battery monomer, battery and power utilization device

Abstract

The utility model relates to a pole structure, a top cover assembly, a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, the pole structure comprises a mounting carrier, a pole, a fixing ring and a sealing member, the mounting carrier is provided with a mounting hole, and the mounting carrier comprises a first abutting wall; the pole comprises a first metal layer and a second metal layer which are stacked, and the first metal layer at least comprises a first step surface; the fixing ring sleeves the peripheral wall of the second metal layer and comprises a first end wall; the sealing element sleeves the peripheral wall of the first metal layer; the sealing piece comprises a first sealing wall and a second sealing wall which are oppositely arranged, the first sealing wall abuts against the first abutting wall, and the second sealing wall abuts against the first step face and the first end wall. According to the pole structure, the top cover assembly, the battery monomer, the battery and the electric device, under the condition of ensuring good sealing performance, the material consumption of the composite metal body is reduced, and the production cost is effectively reduced.

Description

Technical Field

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

[0002] The pole structure in the battery usually uses copper-aluminum composite materials to meet the requirements of push-pull strength, torsional strength, etc. At present, the pole structure includes injection molding structure, riveting structure, etc. The pole structure manufactured by injection molding or riveting process needs to consume a large amount of copper-aluminum composite materials, resulting in high production costs. Utility Model Content

[0003] In order to solve the above technical problems, the embodiments of the present application provide a pole structure, a top cover assembly, a battery cell, a battery and an electrical device, which reduce the material used for the composite metal body while ensuring good sealing performance, thereby effectively reducing production costs.

[0004] In a first aspect, a pole structure is provided, comprising:

[0005] A mounting carrier having a mounting hole, wherein the mounting carrier comprises a first abutting wall;

[0006] A pole, comprising a first metal layer and a second metal layer stacked together, wherein the first metal layer at least comprises a first step surface;

[0007] A fixing ring, sleeved on the outer peripheral wall of the second metal layer, the fixing ring comprising a first end wall;

[0008] A sealing member is sleeved on the outer peripheral wall of the first metal layer; the sealing member comprises a first sealing wall and a second sealing wall which are arranged opposite to each other, the first sealing wall abuts against the first abutting wall, and the second sealing wall abuts against the first step surface and the first end wall.

[0009] According to a first aspect of the present application, the first metal layer is an aluminum layer, and the second metal layer is a copper layer.

[0010] According to a first aspect of the present application, the first end wall is coplanar with the first step surface.

[0011] According to the first aspect of the present application, the first end wall is provided with a groove, the distance between the bottom wall of the groove and the first abutment wall is greater than the distance between the bonding surface of the first metal layer and the second metal layer and the first abutment wall, and at least part of the seal is fitted in the groove.

[0012] According to the first aspect of the present application, a first accommodating groove is provided on a side of the second metal layer away from the first metal layer, and the first accommodating groove extends to the bonding surface between the fixing ring and the second metal layer; and / or,

[0013] The fixing ring further comprises a second end wall arranged opposite to the first end wall, the second end wall is provided with a second containing groove, and the second containing groove extends to the bonding surface between the fixing ring and the second metal layer.

[0014] According to the first aspect of the present application, there is a height difference between a side of the fixing ring away from the first metal layer and a side of the second metal layer away from the first metal layer, forming a step groove.

[0015] According to a first aspect of the present application, the first metal layer further comprises a second step surface, and a distance between the second step surface and a bonding surface between the first metal layer and the second metal layer is greater than a distance between the first step surface and a bonding surface between the first metal layer and the second metal layer;

[0016] The pole structure further includes a connecting piece, and the connecting piece is matched with the mounting hole and matched with the second step surface.

[0017] According to the first aspect of the present application, the connecting member at least includes a welding portion, the welding portion is cylindrical, and the welding portion is penetrated and welded to the second step surface; or,

[0018] The first metal layer also includes a third step surface, and the distance between the third step surface and the bonding surface of the first metal layer and the second metal layer is greater than the distance between the second step surface and the bonding surface of the first metal layer and the second metal layer. A step portion is formed between the third step surface and the second step surface, and the welding portion is cylindrical, and the inner side wall of the welding portion is welded to the step portion.

[0019] According to the first aspect of the present application, a side surface of the welding portion away from the second step surface is coplanar with the third step surface.

[0020] According to the first aspect of the present application, a material reduction groove is provided on a side of the connecting member away from the first metal layer.

[0021] According to the first aspect of the present application, at least a portion of the welding portion abuts against the first sealing wall.

[0022] According to the first aspect of the present application, the first sealing wall is coplanar with the second step surface.

[0023] According to the first aspect of the present application, the pole structure also includes a first insulating member, which is arranged between the connecting member and the mounting carrier to insulate the connecting member and the mounting carrier; at least a portion of the first insulating member extends into the mounting hole and abuts against the first sealing wall.

[0024] According to the first aspect of the present application, the mounting carrier also includes a second abutment wall arranged opposite to the first abutment wall, and the portion of the second abutment wall close to the mounting hole protrudes in a direction close to the first insulating member to form a protrusion; the first insulating member is provided with a depression on a side surface corresponding to the protrusion, and the depression cooperates with the protrusion.

[0025] According to a first aspect of the present application, a portion of the first abutting wall close to the mounting hole is recessed toward a direction close to the first insulating member to form a receiving groove, and at least a portion of the sealing member is received in the receiving groove.

[0026] According to the first aspect of the present application, the mounting carrier also includes a second abutment wall arranged opposite to the first abutment wall, and the portion of the second abutment wall close to the mounting hole protrudes toward the direction close to the first insulating member to form a protrusion, and the groove depth of the receiving groove is greater than the protruding height of the protrusion.

[0027] According to the first aspect of the present application, the pole structure further includes a second insulating member, which is matched with the first abutting wall, and at least a portion of the second insulating member extends to the receiving groove and is located between the first abutting wall and the fixing ring.

[0028] According to the first aspect of the present application, the inner hole wall of the mounting hole and the first insulating member is a non-circular structure.

[0029] In a second aspect, a top cover assembly is also provided, comprising:

[0030] Cover plate;

[0031] As in the pole structure described in the previous embodiment, the mounting carrier is at least a part of the cover plate.

[0032] In a third aspect, a battery cell is also provided, comprising:

[0033] case;

[0034] An electrode assembly is accommodated in the housing;

[0035] As described in the previous embodiment, the top cover assembly is arranged at the opening of the shell.

[0036] In a fourth aspect, a battery cell is also provided, comprising:

[0037] case;

[0038] In the pole structure as described in the previous embodiment, the mounting carrier is at least a part of the housing;

[0039] An electrode assembly is accommodated in the housing;

[0040] A cover plate is arranged at the opening of the shell.

[0041] According to a fourth aspect of the present application, the electrode assembly includes an electrode body and a pole tab disposed on the electrode body, and the pole tab is welded to the fixing ring or the second metal layer.

[0042] According to a fourth aspect of the present application, the electrode assembly includes an electrode body, a pole ear arranged on the electrode body, and a transition piece connected to the pole ear, and the transition piece is welded to the fixing ring or the second metal layer.

[0043] According to a fourth aspect of the present application, the fixing ring and the adapter plate are integrally formed.

[0044] In a fifth aspect, a battery is also provided, comprising the battery cell as described in the previous embodiment.

[0045] In a sixth aspect, an electrical device is also provided, comprising the battery as described in the previous embodiment.

[0046] The pole structure, top cover assembly, battery cell, battery and electrical device provided in the embodiments of the present application are arranged on the outer wall of the second metal layer through a fixing ring, which can not only effectively improve the problem of easy contact of the electrolyte with the first metal layer, but also avoid increasing the length of the second metal layer, and can reduce the material of the composite metal body of the pole; the first sealing wall abuts against the first abutting wall, and the second sealing wall abuts against the first step wall and the first end wall, so that part of the seal can cover the junction between the fixing ring and the second metal layer, preventing the electrolyte from flowing from the junction between the fixing ring and the second metal layer to the first metal layer, thereby ensuring good sealing performance, thereby reducing the material of the composite metal body while ensuring good sealing performance, and effectively reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0048] Figure 1 An exploded schematic diagram of a pole structure provided by an exemplary embodiment of the present application.

[0049] Figure 2 A schematic structural diagram of a pole structure provided by an exemplary embodiment of the present application.

[0050] Figure 3A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application.

[0051] Figure 4 A schematic structural diagram of a seal and a fixing ring provided in another exemplary embodiment of the present application.

[0052] Figure 5 A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application.

[0053] Figure 6 A schematic structural diagram of a pole and a fixing ring provided in another exemplary embodiment of the present application.

[0054] Figure 7 A schematic structural diagram of a pole and a fixing ring provided in another exemplary embodiment of the present application.

[0055] Figure 8 A schematic structural diagram of a pole and a fixing ring provided in another exemplary embodiment of the present application.

[0056] Fig. 9 A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application.

[0057] Fig.10 A schematic structural diagram of a connector and a pole provided in another exemplary embodiment of the present application.

[0058] Fig.11 A schematic structural diagram of a first insulating member and a mounting carrier provided in an exemplary embodiment of the present application.

[0059] Fig.12 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application.

[0060] Fig.13 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application.

[0061] Fig.14 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application.

[0062] Fig.15 A schematic structural diagram of a first insulating member provided for another exemplary embodiment of the present application.

[0063] Reference numerals: 100-pole structure; 110-mounting carrier; 111-mounting hole; 112-first abutting wall; 113-second abutting wall; 114-protrusion; 115-accommodating groove; 116-stop hole; 120-pole; 121-first metal layer; 1211-first step surface; 1212-second step surface; 1213-third step surface; 1214-step portion; 122-second metal layer; 123-first accommodating groove; 130- Fixed ring; 131-first end wall; 132-second end wall; 133-groove; 134-second accommodating groove; 135-step groove; 140-sealing member; 141-first sealing wall; 142-second sealing wall; 143-bump; 150-connecting member; 151-welding portion; 152-reducing groove; 153-extension portion; 154-connecting portion; 160-first insulating member; 161-recess; 162-stop block; 170-second insulating member. DETAILED DESCRIPTION

[0064] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0065] Figure 1 An exploded schematic diagram of a pole structure provided by an exemplary embodiment of the present application. Figure 2 A schematic diagram of a pole structure is provided for an exemplary embodiment of the present application. Figure 1 and Figure 2 As shown, the pole structure 100 provided in the embodiment of the present application may include a mounting carrier 110, a pole 120 and a fixing ring 130, the mounting carrier 110 is provided with a mounting hole 111, the mounting carrier 110 includes a first abutting wall 112, the pole 120 is made of a composite metal body, specifically, the pole 120 includes a first metal layer 121 and a second metal layer 122 stacked, the first metal layer 121 includes at least a first step surface 1211, and the fixing ring 130 is sleeved on the outer peripheral wall of the second metal layer 122.

[0066] In practical applications, the first metal layer 121 and the second metal layer 122 are made of different metal materials. Generally speaking, the first metal layer 121 is easily corroded by the electrolyte, while the second metal layer 122 is not easily corroded by the electrolyte. Therefore, the second metal layer 122 is arranged on the side close to the electrolyte. However, there is a situation where the electrolyte spreads from the edge of the second metal layer 122 to the first metal layer 121 and corrodes the first metal layer 121. Therefore, a fixing ring 130 is used to be sleeved on the outer peripheral wall of the second metal layer 122. In this way, not only can the problem of the electrolyte easily contacting the first metal layer 121 be effectively improved, but also the length of the second metal layer 122 is avoided to be directly increased, and the composite metal body material of the pole 120 can be reduced.

[0067] Furthermore, the fixing ring 130 includes a first end wall 131, and the sealing member 140 is sleeved on the outer peripheral wall of the first metal layer 121. The sealing member 140 includes a first sealing wall 141 and a second sealing wall 142 which are arranged opposite to each other, the first sealing wall 141 abuts against the first abutting wall 112, and the second sealing wall 142 abuts against the first step surface 1211 and the first end wall 131. In this way, part of the sealing member 140 can cover the junction of the fixing ring 130 and the second metal layer 122, preventing the electrolyte from flowing from the junction of the fixing ring 130 and the second metal layer 122 to the first metal layer 121, thereby ensuring good sealing performance.

[0068] The pole structure 100 provided in the embodiment of the present application, under the joint action of the seal 140 and the fixing ring 130, not only ensures good sealing between the fixing ring 130 and the second metal layer 122, and prevents the first metal layer 121 from contacting the electrolyte, but also shortens the length of the second metal layer 122 (the fixing ring 130 can be made of the same material as the second metal layer 122, and is not easily corroded by the electrolyte), effectively saving the material of the composite metal pole 120 and effectively reducing the production cost.

[0069] In one embodiment, the first metal layer 121 is an aluminum layer, and the second metal layer 122 is a copper layer. It should be understood that the aluminum layer of the same volume is lighter and has a lower manufacturing cost than the copper layer. Therefore, compared with the pure copper structure, the composite metal body structure using the first metal layer 121 and the second metal layer 122 is more economical. In addition, since the aluminum layer is easily corroded by the electrolyte, and the copper layer is not easily corroded by the electrolyte, the copper layer is arranged on the side close to the electrolyte.

[0070] It should be understood that when the second metal layer 122 is a copper layer, the aforementioned fixing ring 130 can also use a copper ring structure, which is not easily corroded by the electrolyte, can effectively prevent the electrolyte from contacting the aluminum layer, and is easier to connect to the second metal layer 122 (copper layer) by welding.

[0071] like Figure 1 and Figure 2 As shown, in one embodiment, the first end wall 131 is coplanar with the first step surface 1211. In this way, after the second sealing wall 142 of the seal 140 abuts against the first end wall 131 and the first step surface 1211, it is not easy for a gap to appear between the second sealing wall 142 and the first end wall 131 and between the second sealing wall 142 and the first step surface 1211, which can further improve the sealing performance and prevent the electrolyte from contacting the first metal layer 121.

[0072] Figure 3 A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application. Figure 4 This is a schematic diagram of the structure of a seal and a fixing ring provided by another exemplary embodiment of the present application. Figure 3 and Figure 4 As shown, in one embodiment, the first end wall 131 is provided with a groove 133, the distance between the bottom wall of the groove 133 and the first abutting wall 112 is greater than the distance between the bonding surface of the first metal layer 121 and the second metal layer 122 and the first abutting wall 112, and at least part of the seal 140 is matched with the groove 133. In this way, the part of the seal 140 located in the groove 133 can cover the bonding surface of the first metal layer 121 and the second metal layer 122, effectively preventing the electrolyte from penetrating through the bonding surface of the fixing ring 130 and the second metal layer 122 to contact the first metal layer 121, further improving the sealing performance. In practical applications, the fixing ring 130 and the second metal layer 122 are generally welded, and gaps are likely to exist when the welding is poor, so that the electrolyte penetrates from the bonding surface of the fixing ring 130 and the second metal layer 122 to contact the first metal layer 121.

[0073] In one embodiment, if Figure 3 and Figure 4 As shown, a protrusion 143 may be provided on the second sealing wall 142 of the sealing member 140 , and the protrusion 143 cooperates with the groove 133 .

[0074] In one embodiment, the sealing member 140 may be entirely disposed in the groove 133 .

[0075] Figure 5 A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application. Figure 6 This is a schematic diagram of the structure of a pole and a fixing ring provided by another exemplary embodiment of the present application. Figure 5 and Figure 6As shown, a first receiving groove 123 is provided on a side of the second metal layer 122 away from the first metal layer 121, and the first receiving groove 123 extends to the joint surface between the fixing ring 130 and the second metal layer 122. It should be noted that after the fixing ring 130 is sleeved on the outer peripheral wall of the second metal layer 122, the fixing ring 130 and the second metal layer 122 are connected to each other by welding. During the welding process, welding slag will be generated, and the first receiving groove 123 can be used to contain the welding slag to prevent the welding slag from accumulating at the bottom of the second metal layer 122 and the fixing ring 130.

[0076] like Figure 5 and Figure 6 As shown, the fixing ring 130 further includes a second end wall 132, which is arranged opposite to the first end wall 131, and is provided with a second receiving groove 134, which extends to the joint surface between the fixing ring 130 and the second metal layer 122. The second receiving groove 134 has a similar function to the first receiving groove 123, and the second receiving groove 134 can also be used to accommodate welding slag generated when the joint surface between the fixing ring 130 and the second metal layer 122 is welded.

[0077] In one embodiment, the first receiving groove 123 and the second receiving groove 134 may exist at the same time, or only one of them may exist.

[0078] Figure 7 A schematic structural diagram of a pole and a fixing ring provided in another exemplary embodiment of the present application. Figure 8 This is a schematic diagram of the structure of a pole and a fixing ring provided by another exemplary embodiment of the present application. Figure 7 and Figure 8 As shown, there is a height difference between the side of the fixing ring 130 away from the first metal layer 121 and the side of the second metal layer 122 away from the first metal layer 121, forming a step groove 135. The step groove 135 has a similar function to the aforementioned first receiving groove 123, and the step groove 135 can be used to accommodate welding slag generated when the joint surface of the fixing ring 130 and the second metal layer 122 is welded.

[0079] like Figure 7 As shown, in one embodiment, the side of the fixing ring 130 away from the first metal layer 121 is higher than the side of the second metal layer 122 away from the first metal layer 121, forming a step groove 135, and the area below the side of the fixing ring 130 away from the first metal layer 121 can be used to accommodate welding slag.

[0080] like Figure 8 As shown, in one embodiment, the side of the second metal layer 122 away from the first metal layer 121 is higher than the side of the fixing ring 130 away from the first metal layer 121, forming a step groove 135, and the area below the side of the second metal layer 122 away from the first metal layer 121 can be used to accommodate welding slag.

[0081] like Figure 1 and Figure 2 As shown, the first metal layer 121 may further include a second step surface 1212, and the distance between the second step surface 1212 and the bonding surface of the first metal layer 121 and the second metal layer 122 is greater than the distance between the first step surface 1211 and the bonding surface of the first metal layer 121 and the second metal layer 122; the pole structure 100 may further include a connector 150, the connector 150 cooperates with the mounting hole 111 and cooperates with the second step surface 1212.

[0082] In practical applications, the connector 150 is made of metal and can be used for external connection of the bar. Specifically, the connector 150 can be made of metal aluminum, which not only has good electrical conductivity but also has a light weight, which is conducive to reducing the overall weight.

[0083] like Figure 1 and Figure 2 As shown, in one embodiment, a material reduction groove 152 is provided on the side of the connector 150 away from the first metal layer 121. In this way, on the one hand, the weight of the connector 150 can be further reduced, saving costs; on the other hand, the inner wall of the material reduction groove 152 can increase the electrical connection area and the heat exchange area, thereby improving the electrical connection effect and heat exchange effect of the connector 150.

[0084] like Figure 1 and Figure 2 As shown, in one embodiment, the first metal layer 121 may further include a third step surface 1213, the distance between the third step surface 1213 and the bonding surface of the first metal layer 121 and the second metal layer 122 is greater than the distance between the second step surface 1212 and the bonding surface of the first metal layer 121 and the second metal layer 122, and a step portion 1214 is formed between the third step surface 1213 and the second step surface 1212; correspondingly, the connector 150 at least includes a welding portion 151, the welding portion 151 is cylindrical, and the inner side wall of the welding portion 151 is welded to the step portion 1214. It should be understood that the welding portion 151 is sleeved on the step portion 1214, and the step portion 1214 can limit the assembly of the welding portion 151, which is convenient for quick assembly. Welding the inner side wall of the welding portion 151 to the step portion 1214 can improve the sealing performance and avoid sealing failure, air leakage, etc.

[0085] like Figure 1 and Figure 2 As shown, the side surface of the welding portion 151 away from the second step surface 1212 is coplanar with the third step surface 1213. In this way, during the welding of the welding portion 151 and the step portion 1214, the welding surface can be prevented from bulging, the welding quality is effectively improved, and the reliability of the welded structure is effectively guaranteed.

[0086] Fig. 9 A schematic structural diagram of a pole structure provided in another exemplary embodiment of the present application. Fig.10 This is a schematic diagram of the structure of a connector and a pole provided by another exemplary embodiment of the present application. Fig. 9 and Fig.10 As shown, in one embodiment, the first metal layer 121 may not be provided with the aforementioned third step surface 1213, and may be directly connected to the welding portion 151 through the second step surface 1212, that is, the welding portion 151 is cylindrical, and the welding portion 151 is penetrated and welded to the second step surface 1212. In this way, the welding area is increased, the welding quality is further improved, and the penetration welding can also achieve a high-strength connection effect, the connection is more firm, and the durability is better.

[0087] Combination Figure 1 and Fig.10 The connecting member 150 is in a "J"-shaped structure. The connecting member 150 includes an extension portion 153, a connecting portion 154 and a welding portion 151 connected in sequence. The connecting portion 154 is arranged in the mounting hole 111. The aforementioned material reduction groove 152 is arranged on the connecting portion 154. The extension portion 153 extends outside the mounting hole 111 to play a role in installation limiting and improve the assembly stability of the connecting member 150. The welding portion 151 is used to connect the aforementioned step portion 1214 or the second step surface 1212. Figure 1 In the state shown, the welding portion 151 is cylindrical and is used to connect the step portion 1214; Fig.10 In the state shown, the welding portion 151 is cylindrical and is used to connect the second step surface 1212 .

[0088] like Figure 1 , Figure 2 , Fig. 9 as well as Fig.10 As shown, at least part of the welding portion 151 abuts against the first sealing wall 141, so that, on the one hand, the sealing member 140 can be compressed to improve the sealing performance, and on the other hand, different parts of the sealing member 140 can be compressed to achieve a uniform pressure effect.

[0089] like Figure 1 and Figure 2 As shown, in one embodiment, the first sealing wall 141 is coplanar with the second step surface 1212. In this way, when the welding portion 151 and the first abutting wall 112 press the sealing member 140 together, the sealing performance of the sealing member 140 can be further improved, and a gap is not likely to appear between the sealing member 140 and the second step surface 1212.

[0090] In one embodiment, there may also be a height difference between the first sealing wall 141 and the second step surface 1212 .

[0091] like Figure 1 and Figure 2 As shown, the pole structure 100 may further include a first insulating member 160 , which is disposed between the connector 150 and the mounting carrier 110 . The first insulating member 160 may insulate the connector 150 from the mounting carrier 110 to prevent arcing, short circuit, and the like.

[0092] like Figure 1 and Figure 2 As shown, at least part of the first insulating member 160 extends into the mounting hole 111 and abuts against the first sealing wall 141, so that, on the one hand, the part extending into the mounting hole 111 can insulate the outer wall of the connecting member 150 and the inner wall of the mounting hole 111; on the other hand, the first insulating member 160 abuts against the first sealing wall 141, which is beneficial to compressing the seal 140 and improving the sealing performance of the seal 140; combined with the foregoing, the first insulating member 160, the welding portion 151 and the first abutting wall 112 respectively press against different parts of the seal 140, which is beneficial to uniform pressure on the seal 140 and further improves the sealing performance.

[0093] like Figure 1 and Figure 2 As shown, the mounting carrier 110 may further include a second abutment wall 113, which is arranged opposite to the first abutment wall 112. The portion of the second abutment wall 113 close to the mounting hole 111 protrudes toward the direction close to the first insulating member 160 to form a protrusion 114. A recess 161 is provided on the side surface of the first insulating member 160 corresponding to the protrusion 114, and the recess 161 cooperates with the protrusion 114.

[0094] It should be noted that the protrusion 114 can block external liquid and effectively prevent external liquid from entering the mounting hole 111. The matching structure of the recess 161 and the protrusion 114 can improve the assembly stability between the first insulating member 160 and the mounting carrier 110 and prevent the first insulating member 160 from being separated from the mounting carrier 110.

[0095] like Figure 1 and Figure 2 As shown, the portion of the first abutment wall 112 close to the mounting hole 111 is recessed toward the direction close to the first insulating member 160 to form a receiving groove 115. The receiving groove 115 can improve space utilization. At least a portion of the seal 140 can be received in the receiving groove 115, reducing the internal area of ​​the battery cell occupied by the seal 140, which is beneficial to improving the space utilization of the battery cell and improving the energy density of the battery cell.

[0096] In one embodiment, the depth of the receiving groove 115 is greater than the protruding height of the protrusion 114, so that the internal space of the receiving groove 115 can be increased as much as possible, allowing the receiving groove 115 to accommodate more parts, further improving the space utilization inside the battery cell.

[0097] like Figure 1 and Figure 2 As shown, the pole structure 100 may further include a second insulating member 170 , which is matched with the first abutting wall 112 , and at least a portion of the second insulating member 170 extends into the receiving groove 115 and is located between the first abutting wall 112 and the fixing ring 130 .

[0098] It should be understood that the second insulating member 170 can insulate the first abutting wall 112 and the fixing ring 130 to prevent arcing, short circuit, etc. At least part of the second insulating member 170 is located in the receiving groove 115, which can also reduce the amount of space occupied by the second insulating member 170 in the battery cell.

[0099] Fig.11 A schematic structural diagram of a first insulating member and a mounting carrier provided in an exemplary embodiment of the present application. Fig.12 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application. Fig.13 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application. Fig.14 A schematic structural diagram of a first insulating member and a mounting carrier provided in another exemplary embodiment of the present application. Fig.15 FIG. 1 is a schematic diagram of the structure of a first insulating member provided by another exemplary embodiment of the present application. Figures 11 to 15 As shown, the inner hole walls of the mounting hole 111 and the first insulating member 160 are non-circular structures, so that the first insulating member 160 can be prevented from rotating relative to the mounting hole 111, thereby preventing the connecting member 150 from rotating relative to the mounting hole 111, and further preventing the pole 120 from rotating relative to the mounting carrier 110, thereby ensuring the assembly stability of the first insulating member 160, the connecting member 150 and the pole 120.

[0100] Specifically, the inner hole walls of the mounting hole 111 and the first insulating member 160 may be non-circular structures, such as rectangular structures, polygonal structures, elliptical structures, and eccentric circular structures.

[0101] like Fig.14 and Fig.15 As shown, the mounting carrier 110 is provided with a stop hole 116, and the first insulating member 160 is provided with a stop block 162. The stop block 162 cooperates with the stop hole 116 to prevent the first insulating member 160 from rotating relative to the mounting carrier 110, thereby preventing the first insulating member 160 from rotating in the mounting hole 111.

[0102] In one embodiment, the mounting carrier 110 may be provided with a stop block 162 , the first insulating member 160 may be provided with a stop hole 116 , and the stop block 162 cooperates with the stop hole 116 .

[0103] The embodiment of the present application further provides a top cover assembly, which may include a cover plate and the pole structure 100 as described in the previous embodiment, and the mounting carrier 110 is at least a part of the cover plate.

[0104] In one embodiment, the mounting carrier 110 may be integrally formed with other parts of the cover plate, or they may be connected to each other by welding or bonding.

[0105] The top cover assembly provided in the embodiment of the present application has all the functions and all the beneficial effects of the aforementioned pole structure 100.

[0106] The embodiment of the present application also provides a battery cell, which can be a square shell battery or a cylindrical battery.

[0107] In one embodiment, when the battery cell is a square shell battery, the battery cell may include a shell, an electrode assembly and a top cover assembly as described in the previous embodiment, wherein the electrode assembly is accommodated in the shell, and the top cover assembly is arranged at the opening of the shell. The battery cell has all the functions and all the beneficial effects of the above-mentioned top cover assembly.

[0108] In one embodiment, when the battery cell is a cylindrical battery, the battery cell may include a housing, an electrode assembly, a cover plate, and the pole structure 100 as described in the previous embodiment, wherein the electrode assembly is accommodated in the housing, the cover plate is disposed at the opening of the housing, and the mounting carrier 110 is at least a part of the housing. The battery cell has all the functions and all the beneficial effects of the pole structure 100 described above.

[0109] In one embodiment, the electrode assembly may include an electrode body and a tab, wherein the tab is disposed on the electrode body and welded to the fixing ring 130 or the second metal layer 122 , thereby realizing the function of interconnecting the electrode assembly and the pole structure 100 and transmitting current.

[0110] In one embodiment, the electrode assembly includes an electrode body, a pole ear and an adapter plate. The pole ear is arranged on the electrode body, and the adapter plate is connected to the pole ear. The adapter plate can be welded to the fixing ring 130 or the second metal layer 122 to realize the function of connecting the electrode assembly and the pole structure 100 to each other and transmitting current.

[0111] In one embodiment, the fixing ring 130 is integrally formed with the adapter. Specifically, the implementation of the integral forming may include providing a through hole in the adapter, and the portion of the adapter provided with the through hole serves as the fixing ring 130; or, the fixing ring 130 is attached to one side of the adapter, and after the integral forming process, the fixing ring 130 is fixed on the adapter, and the through hole of the fixing ring 130 is formed into a groove structure.

[0112] The embodiments of the present application also provide a battery, which may include the battery cells (including square shell batteries and cylindrical batteries) as described in the previous embodiments, and have all the functions and all the beneficial effects of the battery cells.

[0113] Among them, the above-mentioned battery can be a battery pack or a battery module. When the above-mentioned battery is a battery pack, the battery pack specifically includes a battery management system (BMS) and a plurality of the above-mentioned battery cells. A plurality of battery cells can be electrically connected in series, in parallel, or in a mixture of series and parallel, and communicated with the battery management system to form a battery pack, and the above-mentioned battery management system controls and monitors the working status of each battery cell. In addition, a plurality of battery cells can also be first connected in series and / or in parallel, and form a battery module with a module management system, and then a plurality of battery modules are electrically connected in series, in parallel, or in a mixture of series and parallel, and together with the battery management system, form a battery pack.

[0114] The battery pack or battery module may be mounted on a supporting structure such as a box, frame, or bracket, and the battery cells and the battery management system may be electrically connected to each other through a busbar, such as a bar. The battery cells may be lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and their outer contours may be cylindrical, flat, rectangular, or other shapes, but are not limited thereto.

[0115] The embodiment of the present application also provides an electrical device, which may include the battery as described in the previous embodiment, and has all the functions and all the beneficial effects of the battery.

[0116] In one embodiment, the power-consuming device includes the above-mentioned battery or the above-mentioned battery monomer, and can be provided with electric energy by the above-mentioned battery or the above-mentioned battery monomer. Among them, the above-mentioned power-consuming device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, an energy storage device, an amusement equipment, an elevator and a lifting equipment, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy or an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc.; the energy storage device can be an energy storage wall, a base station energy storage, a container energy storage, etc.; the amusement equipment can be a carousel, a jumping machine, etc. This application does not impose any special restrictions on the above-mentioned power-consuming device. This can include electric vehicles, industrial robots, etc.

[0117] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0118] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0119] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0120] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0121] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A pole structure, characterized in that: include: A mounting carrier (110) is provided with a mounting hole (111), wherein the mounting carrier (110) comprises a first abutting wall (112); A pole (120) comprising a first metal layer (121) and a second metal layer (122) which are stacked, wherein the first metal layer (121) comprises at least a first step surface (1211); A fixing ring (130) sleeved on the outer peripheral wall of the second metal layer (122), the fixing ring (130) comprising a first end wall (131); A sealing member (140) is sleeved on the outer peripheral wall of the first metal layer (121); the sealing member (140) comprises a first sealing wall (141) and a second sealing wall (142) which are arranged opposite to each other, the first sealing wall (141) abuts against the first abutting wall (112), and the second sealing wall (142) abuts against the first step surface (1211) and the first end wall (131).

2. The pole structure according to claim 1, characterized in that: The first metal layer (121) is an aluminum layer, and the second metal layer (122) is a copper layer.

3. The pole structure according to claim 1, characterized in that: The first end wall (131) is coplanar with the first step surface (1211).

4. The pole structure according to claim 1, characterized in that: The first end wall (131) is provided with a groove (133), the distance between the bottom wall of the groove (133) and the first abutment wall (112) is greater than the distance between the bonding surface of the first metal layer (121) and the second metal layer (122) and the first abutment wall (112), and at least a portion of the seal (140) is fitted in the groove (133).

5. The pole structure according to claim 1, characterized in that: A first containing groove (123) is provided on a side of the second metal layer (122) away from the first metal layer (121), and the first containing groove (123) extends to a joint surface between the fixing ring (130) and the second metal layer (122); and / or, The fixing ring (130) further comprises a second end wall (132) arranged opposite to the first end wall (131), the second end wall (132) being provided with a second receiving groove (134), and the second receiving groove (134) extending to the joint surface between the fixing ring (130) and the second metal layer (122).

6. The pole structure according to claim 1, characterized in that: There is a height difference between the side of the fixing ring (130) away from the first metal layer (121) and the side of the second metal layer (122) away from the first metal layer (121), forming a step groove (135).

7. The pole structure according to any one of claims 1 to 6, characterized in that: The first metal layer (121) further comprises a second step surface (1212), and a distance between the second step surface (1212) and a bonding surface between the first metal layer (121) and the second metal layer (122) is greater than a distance between the first step surface (1211) and a bonding surface between the first metal layer (121) and the second metal layer (122); The pole structure also includes a connecting piece (150), and the connecting piece (150) cooperates with the mounting hole (111) and cooperates with the second step surface (1212).

8. The pole structure according to claim 7, characterized in that: The connecting member (150) at least comprises a welding portion (151), the welding portion (151) is cylindrical, and the welding portion (151) is penetrated and welded to the second step surface (1212); or, The first metal layer (121) further includes a third step surface (1213), the distance between the third step surface (1213) and the bonding surface between the first metal layer (121) and the second metal layer (122) is greater than the distance between the second step surface (1212) and the bonding surface between the first metal layer (121) and the second metal layer (122), a step portion (1214) is formed between the third step surface (1213) and the second step surface (1212), the welding portion (151) is cylindrical, and the inner wall of the welding portion (151) is welded to the step portion (1214).

9. The pole structure according to claim 8, characterized in that: A side surface of the welding portion (151) away from the second step surface (1212) is coplanar with the third step surface (1213).

10. The pole structure according to claim 8, characterized in that: A material reduction groove (152) is provided on a side of the connecting member (150) away from the first metal layer (121).

11. The pole structure according to claim 8, characterized in that: At least a portion of the welding portion (151) abuts against the first sealing wall (141).

12. The pole structure according to claim 7, characterized in that: The first sealing wall (141) is coplanar with the second step surface (1212).

13. The pole structure according to claim 7, characterized in that: The pole structure further comprises a first insulating member (160), which is arranged between the connecting member (150) and the mounting carrier (110) to insulate the connecting member (150) from the mounting carrier (110); at least a portion of the first insulating member (160) extends into the mounting hole (111) and abuts against the first sealing wall (141).

14. The pole structure according to claim 13, characterized in that: The mounting carrier (110) further comprises a second abutting wall (113) arranged opposite to the first abutting wall (112); a portion of the second abutting wall (113) close to the mounting hole (111) protrudes in a direction close to the first insulating member (160) to form a protrusion (114); a recess (161) is arranged on a side surface of the first insulating member (160) corresponding to the protrusion (114), and the recess (161) cooperates with the protrusion (114).

15. The pole structure according to claim 13, characterized in that: A portion of the first abutting wall (112) close to the mounting hole (111) is recessed in a direction close to the first insulating member (160) to form a receiving groove (115), and at least a portion of the sealing member (140) is received in the receiving groove (115).

16. The pole structure according to claim 15, characterized in that: The mounting carrier (110) further comprises a second abutting wall (113) arranged opposite to the first abutting wall (112); a portion of the second abutting wall (113) close to the mounting hole (111) protrudes in a direction close to the first insulating member (160) to form a protrusion (114); and a groove depth of the receiving groove (115) is greater than a protruding height of the protrusion (114).

17. The pole structure according to claim 15, characterized in that: The pole structure also includes a second insulating member (170), the second insulating member (170) being matched with the first abutting wall (112), at least a portion of the second insulating member (170) extending into the receiving groove (115), and being located between the first abutting wall (112) and the fixing ring (130).

18. The pole structure according to claim 13, characterized in that: The inner hole walls of the mounting hole (111) and the first insulating member (160) are non-circular structures.

19. A top cover assembly, characterized in that: include: Cover plate; According to the pole structure as claimed in any one of claims 1 to 18, the mounting carrier (110) is at least a part of the cover plate.

20. A battery cell, characterized in that: include: case; An electrode assembly is accommodated in the housing; The top cover assembly as described in claim 19, wherein the top cover assembly is disposed at the opening of the shell.

21. A battery cell, characterized in that: include: case; The pole structure according to any one of claims 1 to 18, wherein the mounting carrier (110) is at least a part of the housing; An electrode assembly is accommodated in the housing; A cover plate is arranged at the opening of the shell.

22. The battery cell according to claim 20 or 21, characterized in that: The electrode assembly comprises an electrode body and a pole ear arranged on the electrode body, and the pole ear is welded to the fixing ring (130) or the second metal layer (122).

23. The battery cell according to claim 20 or 21, characterized in that: The electrode assembly comprises an electrode body, a pole ear arranged on the electrode body, and a switching piece connected to the pole ear, wherein the switching piece is welded to the fixing ring (130) or the second metal layer (122).

24. The battery cell according to claim 23, characterized in that: The fixing ring (130) and the adapter plate are integrally formed.

25. A battery, characterized in that: Comprising the battery cell as claimed in claim 20 or 21.

26. An electrical device, characterized in that: Comprising a battery as claimed in claim 25.

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