Pole, battery cell cover plate, battery cell shell, battery cell, battery and electric energy equipment

Abstract

The utility model relates to a pole, a battery core cover plate, a battery core shell, a battery core, a battery and electric energy equipment, the pole comprises a pole body and a connecting rib, the pole body is embedded in the cover plate, a part of the pole body is located on the outer side of the cover plate, the pole body is provided with a liquid injection hole, and the liquid injection hole penetrates through the pole body in the length direction of the pole body; the connecting piece is located on the side, extending out of the cover plate, of the pole body, the size of the connecting piece is larger than that of the pole body in the length direction perpendicular to the pole body, the connecting piece comprises a through hole, the through hole is communicated with the liquid injection hole, and a sealing cover is arranged at the end, away from the cover plate, of the through hole and used for sealing the through hole. The connecting piece is arranged on the side, away from the cover plate, of the pole, the liquid injection hole is sealed through the sealing cover on the connecting piece, assembling of the sealing cover is facilitated, the size of the connecting piece is larger than that of the pole body, and the contact area between the sealing cover and the connecting piece is larger than that between the sealing cover and the pole body; therefore, the sealing effect of the liquid injection hole is improved.

Description

Technical Field

[0001] The present application relates to the field of poles, and in particular to a pole, a battery cover, a battery casing, a battery, a battery and an electric energy device. Background Art

[0002] The cell cover is provided with an injection hole, through which the electrolyte is injected into the cell shell. In the prior art cell cover, the injection hole is arranged on the pole, and the injection hole on the pole is sealed by a sealing cover.

[0003] The pole structure is complex and easily deformed by force, which makes the contact surface between the pole and the sealing cover complex and makes it difficult to assemble the pole and the sealing cover. In addition, the pole size is small, and the contact area between the pole and the sealing cover is small, making it difficult to ensure the sealing effect of the injection hole. At the same time, in order to ensure the strength of the pole, it is often necessary to increase the size of the pole structure, which increases the cost and occupies a large space. Utility Model Content

[0004] In view of the above-mentioned technical problems, the purpose of the present application is to provide an easily sealed pole, a battery cover comprising the pole, a battery shell comprising the pole or the battery cover, a battery comprising the pole, the battery cover or the battery shell, a battery comprising the battery, and an electric energy device comprising the battery or the battery, specifically including the following technical solutions:

[0005] In the first aspect, an embodiment of the present application provides a pole, including a pole body and connecting ribs, the pole body is embedded in a cover plate, part of the pole body is located on the outside of the cover plate, the pole body is provided with an injection hole, and the injection hole penetrates the pole body along the length direction of the pole body; the connecting piece is located on the side of the pole body extending out of the cover plate, along the length direction perpendicular to the pole body, the size of the connecting piece is larger than the size of the pole body, the connecting piece includes a through hole, the through hole is connected to the injection hole, and a sealing cover is provided at the end of the through hole away from the cover plate, and the sealing cover is used to seal the through hole.

[0006] The pole body of the pole of the present application is provided with an injection hole, and the connecting piece is provided with a through hole. The injection hole penetrates the pole body along the length direction, and one end of the pole body is located on the outside of the cover plate so that the electrolyte can be injected through the injection hole of the pole body and the through hole of the connecting piece.

[0007] The pole body of the pole of the present application is provided with a connector on the side away from the cover plate, the through hole of the connector is connected to the injection hole, and the through hole is sealed by a sealing cover, and the injection hole is sealed by the sealing cover on the connector. Along the length direction perpendicular to the pole body, the size of the connector is larger than the size of the pole body. Compared with the sealing connection between the sealing cover and the pole body with smaller size and complex structure, the sealing connection between the sealing cover and the connector is easier to achieve, thereby facilitating the assembly of the sealing cover and the pole. The contact area between the sealing cover and the connector is larger than the contact area between the sealing cover and the pole body, thereby improving the sealing effect of the injection hole.

[0008] In addition, the pole of the present application seals the injection hole through the connecting piece and the sealing cover, which can also reduce the structural size required for the pole body, reduce the cost of the pole and improve space utilization.

[0009] In one embodiment, the pole body is partially located in the through hole, and the outer peripheral surface of the pole body includes a first step, which is used to form a first abutment surface. The first abutment surface faces away from the cover plate, and the first abutment surface is in contact with the connecting piece to limit the displacement between the pole body and the connecting piece along the length direction of the pole body.

[0010] In this embodiment, the pole body extends into the through hole, and a first step is provided on the outer peripheral surface of the pole body. The first abutting surface formed by the first step fits against one end of the connecting piece, thereby limiting the distance between the pole body and the connecting piece, preventing the connecting piece from directly contacting the cover plate, and facilitating the fixed connection between the pole body and the connecting piece.

[0011] In one embodiment, a protrusion is provided at the end of the pole body extending into the through hole, and the protrusion extends toward the inner circumference of the through hole. The inner circumference of the through hole includes a second step. The second step forms a second abutment surface, and the second abutment surface faces away from the cover plate. The second abutment surface is fitted with the protrusion to limit the displacement between the pole body and the connecting piece along the length direction of the pole body.

[0012] In this embodiment, the portion of the pole body extending into the through hole is provided with a protrusion, and the protrusion fits with the second abutment surface formed by the second step of the inner circumference of the through hole, thereby limiting the distance between the pole body and the connector, preventing the connector from directly contacting the cover plate, and facilitating the fixation between the pole body and the connector. At the same time, the second abutment surface of the second step can cooperate with the first abutment surface of the first step to limit the relative position between the pole body and the connector.

[0013] In one embodiment, the sealing cover is partially located in the through hole, and the inner circumferential surface of the through hole includes a third step, which is located on the side of the second step away from the cover plate. The third step is used to form a third abutting surface, which faces away from the cover plate and fits the sealing cover.

[0014] In this embodiment, the sealing cover partially extends into the through hole, and the sealing cover is fitted with the third abutting surface formed by the third step in the through hole, thereby limiting the distance between the sealing cover and the connecting piece. At the same time, the sealing cover and the third step abut against each other, which can increase the contact area between the sealing cover and the connecting piece and improve the sealing effect of the injection hole.

[0015] In one embodiment, the cover plate includes an insulating layer, which is fixed to the side of the cover plate facing the connecting member. The insulating layer is provided with a stop hole, and the connecting member is at least partially located in the stop hole. The outer contour of the connecting member and the inner circumference of the stop hole cooperate with each other to limit the relative rotation of the connecting member and the cover plate.

[0016] In this embodiment, the insulating layer is fixed to the cover plate, at least part of the connector is located in the anti-rotation hole of the insulating layer, and the outer contour of the connector cooperates with the inner circumference of the anti-rotation hole to limit the relative rotation of the connector relative to the insulating layer, thereby limiting the relative rotation of the connector and the cover plate. At the same time, the insulating layer can also separate the cover plate and the connector, preventing the connector from directly contacting the cover plate and causing the cover plate to be charged.

[0017] In one embodiment, the cover plate includes a mounting hole, the pole body passes through the mounting hole, the pole body includes a limiting portion, the limiting portion is located on a side of the cover plate away from the connector, and the cross-sectional size of the limiting portion is larger than the size of the mounting hole.

[0018] In this embodiment, the pole body includes a limiting portion whose cross-sectional size is larger than the size of the mounting hole, and the limiting portion is located on the side of the cover plate away from the connecting piece, thereby limiting the axial displacement of the pole body and preventing the pole body from moving toward the connecting piece to pass through the cover plate. At the same time, the limiting portion can also cooperate with the connecting piece to limit the relative position of the pole and the housing, so that the pole is fixed to the housing.

[0019] In one embodiment, a sealing ring is provided between the limiting portion and the cover plate along the axial direction of the pole body.

[0020] In this embodiment, a gap is left between the limiting portion and the cover plate along the axial direction of the pole, and a sealing ring is provided between the limiting portion and the cover plate to seal the limiting portion and the cover plate to prevent the electrolyte from leaking out of the gap between the pole body and the cover plate.

[0021] In one embodiment, a gap is left between the mounting hole and the pole body along a length direction perpendicular to the pole body, and the sealing ring is arranged in the gap between the mounting hole and the pole body.

[0022] In this embodiment, the sealing ring fills the gap between the inner circumference of the mounting hole and the outer circumference of the pole body, further ensuring the sealing effect between the limiting portion and the cover plate, and preventing the electrolyte from leaking from the gap between the pole body and the cover plate.

[0023] In the second aspect, an embodiment of the present application also provides a battery cell cover plate, including a cover plate, a sealing cover and the above-mentioned pole, the pole is embedded in the cover plate and partially located on the outside of the cover plate, the injection hole and the through hole of the pole are connected to both sides of the cover plate, and the sealing cover is used to seal the through hole away from one end of the cover plate.

[0024] In the third aspect, an embodiment of the present application provides a battery cell casing, comprising a shell, a cover plate, a sealing cover and the above-mentioned pole, the shell comprising a accommodating cavity with an opening, the cover plate shielding the opening, and the injection hole of the pole is connected to the accommodating cavity; or comprising a shell and the above-mentioned battery cell cover plate, the shell comprising a accommodating cavity with an opening, the battery cell cover plate shielding the opening, and the injection hole of the pole is connected to the accommodating cavity.

[0025] It can be understood that the battery cell housing and battery cover of the present application use the above-mentioned pole, which facilitates the assembly of the sealing cover and can have a better sealing effect. In the fourth aspect, the present application also provides a battery cell, which includes a battery cell assembly and the above-mentioned pole, and the pole is used to electrically connect the battery cell assembly; or includes a battery cell assembly and the above-mentioned battery cell cover, and the pole of the battery cell cover is used to electrically connect the battery cell assembly; or the battery cell includes a battery cell assembly and the above-mentioned battery cell housing, the battery cell assembly is located in the accommodating cavity of the battery cell housing, and the pole of the battery cell housing is used to electrically connect the battery cell assembly.

[0026] It can be understood that the battery cell of the present application uses the above-mentioned pole or battery cell cover or battery cell shell, which facilitates the assembly of the sealing cover, makes it easier to seal the accommodating cavity, and has better sealing performance, which can prevent leakage of the electrolyte in the accommodating cavity.

[0027] In one embodiment, the battery cell cover plate includes a lead-out plate, which has a penetrating connection hole along the thickness direction. The connection hole is located in the accommodating cavity. The pole passes through the connection hole and is fixedly connected to the lead-out plate. The pole is connected to the battery cell assembly through the lead-out plate.

[0028] In this embodiment, the pole is electrically connected to the battery cell assembly through a lead-out plate, and the lead-out plate is partially located on the outside of the accommodating cavity. The lead-out plate can be electrically connected to the lead-out plate of other battery cell casings, thereby connecting multiple battery cells to realize power supply for the same electrical equipment by multiple battery cells.

[0029] In a fifth aspect, an embodiment of the present application further provides a battery, comprising a battery casing and the above-mentioned battery cell, wherein the battery cell is located in an inner cavity of the battery casing.

[0030] In a sixth aspect, an embodiment of the present application further provides an electric energy device, the electric energy device comprising the above-mentioned battery cell or the above-mentioned battery, the battery cell or the battery being used to supply power to the electric energy device.

[0031] Similarly, the above-mentioned battery and electric energy equipment, because they adopt the pole of the present application, are convenient for assembling the sealing cover, and it is easier to seal the accommodating cavity and have better sealing performance, which can prevent leakage of the electrolyte in the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the exploded structure of a cell cover provided in one embodiment of the present application;

[0033] Figure 2 This is a schematic cross-sectional structure diagram of a battery cell cover provided in one embodiment of the present application;

[0034] Figure 3 A schematic diagram of the cross-sectional structure of a pole provided in one embodiment of the present application;

[0035] Figure 4 This is a schematic diagram of the exploded structure of a battery cell housing provided in one embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of the structure of a battery cell cover provided in one embodiment of the present application;

[0037] Figure 6 A schematic diagram of the cross-sectional structure of a portion of a battery cell cover provided in one embodiment of the present application;

[0038] Figure 7 A schematic diagram of the structure of a pole body before installation provided in an embodiment of the present application;

[0039] Figure 8 A schematic diagram of the cross-sectional structure of a pole body before installation provided in an embodiment of the present application;

[0040] Fig. 9 This is a schematic diagram of the structure of a connecting member provided in one embodiment of the present application;

[0041] Fig.10 A schematic cross-sectional structure diagram of a connector provided in one embodiment of the present application;

[0042] Fig.11 This is a schematic diagram of the structure of a sealing ring provided in one embodiment of the present application;

[0043] Fig.12 This is a schematic diagram of the structure of a portion of a spacer ring provided in an embodiment of the present application;

[0044] Fig.13 A schematic diagram of the structure of a lead-out sheet provided in one embodiment of the present application;

[0045] Fig.14This is a schematic diagram of the structure of a battery cell cover provided in another embodiment of the present application;

[0046] Fig.15 This is a schematic structural diagram of a connecting member provided in another embodiment of the present application;

[0047] Fig.16 A schematic diagram of the structure of an insulating layer provided in another embodiment of the present application;

[0048] Fig.17 It is a schematic diagram of the cross-sectional structure of a portion of a battery cell cover provided in another embodiment of the present application.

[0049] Reference numerals:

[0050] 100-cell housing; 10-cell cover; 11-cover; 111-first blasting hole; 112-blasting cover; 113-installation hole; 12-shell; 13-accommodating cavity; 20-pole; 201-pole body; 21-liquid injection hole; 22-first abutting surface; 23-limiting portion; 24-fourth abutting surface; 25-protruding portion; 26-first end portion; 27-first step; 28-fourth step; 30 -connecting piece; 31-through hole; 311-second abutting surface; 312-third abutting surface; 313-inner wall; 314-second step; 315-third step; 40-sealing cover; 50-sealing ring; 60-lead-out piece; 61-connecting hole; 70-spacer; 71-through hole; 72-second blasting hole; 73-blasting piece; 74-positioning part; 80-insulating layer; 81-stop hole; 90-sealing nail. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0052] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0053] The present application provides a battery cell, which includes a battery cell assembly and a battery cell shell 100. The battery cell assembly is located in a receiving cavity 13 of the battery cell shell 100. The battery cell assembly is electrically connected to a pole 20 on the battery cell shell 100. The pole 20 can be electrically connected to an electrical device, so that the battery cell assembly and the electrical device are conductive. The battery cell assembly is used to power the electrical device.

[0054] See also Figure 1-Figure 3 ,in, Figure 1 A schematic diagram of the exploded structure of a cell cover plate 10 provided in one embodiment of the present application is illustrated; Figure 2 A schematic cross-sectional structure diagram of a cell cover plate 10 provided in one embodiment of the present application is illustrated; Figure 3 A schematic cross-sectional structure diagram of a pole 20 provided in an embodiment of the present application is illustrated.

[0055] The pole 20 of the present application includes a pole body 201 and a connector 30 . The pole body 201 is embedded in the cover plate 11 , and part of the pole body 201 is located outside the cover plate 11 . The pole body 201 is provided with a liquid injection hole 21 , which penetrates the pole body 201 along the length direction of the pole body 201 .

[0056] Specifically, in one embodiment, Figure 1-Figure 3 As shown, the cover plate 11 is in the shape of a circular plate, and the pole body 201 is embedded in the center of the cover plate 11. Figure 2 and Figure 3 The length direction of the pole body 201 is parallel to the Y direction. The pole body 201 passes through the cover plate 11 along the length direction of the pole body 201. One end of the pole body 201 is located outside the cover plate 11, that is, the first end 26 is located outside the cover plate 11. The injection hole 21 passes through the pole body 201 along the length direction of the pole body 201, and the two ends of the injection hole 21 are respectively connected to the opposite sides of the cover plate 11.

[0057] The connecting piece 30 of the pole 20 of the present application is located on the side where the pole body 201 extends out of the cover plate 11. Along the length direction perpendicular to the pole body 201, the size of the connecting piece 30 is larger than the size of the pole body 201. The connecting piece 30 includes a through hole 31, which is connected to the injection hole 21. A sealing cover 40 is provided at the end of the through hole 31 away from the cover plate 11, and the sealing cover 40 is used to seal the through hole 31.

[0058] Specifically, in one embodiment, Figure 2 and Figure 3 As shown, the connector 30 is located at one side of the pole body 201 and is provided with a through hole 31, that is, the connector 30 is located at one side of the first end 26, and the first end 26 partially extends into the through hole 31 and is fixed to the connector 30. A sealing cover 40 is provided at one end of the through hole 31 away from the pole body 201, and the sealing cover 40 is partially located in the through hole 31 to seal the through hole 31. Along the length direction of the pole body 201, the size of the connector 30 is larger than the size of the pole body 201.

[0059] The pole body 201 of the pole 20 of the present application is provided with an injection hole 21, and the connecting piece 30 is provided with a through hole 31. The injection hole 21 penetrates the pole body 201 along the length direction of the pole body 201. One end of the pole body 201 is located on the outside of the cover plate 11, so that the electrolyte can pass through the injection hole 21 of the pole body 201 and the through hole 31 of the connecting piece 30 through the cover plate 11.

[0060] In the existing pole, the pole is provided with an injection hole for replenishing the electrolyte. In order to ensure the efficiency of replenishing the electrolyte, the injection hole of the pole needs to be larger in size. At the same time, in order to ensure the sealing effect of the injection hole, a larger contact area is required between the pole and the sealing cover, which makes the overall size of the pole larger, the weight heavier, and the space utilization rate lower.

[0061] It is understandable that the pole 20 is usually made of an upset part, and increasing the size of the pole 20 will increase the difficulty of the manufacturing process of the pole 20 and increase the manufacturing price of the pole 20 .

[0062] In addition, the structure of the pole 20 is complex, so that the contact surface between the pole 20 and the sealing cover 40 is complex. For example, in the existing battery cover, the pole 20 is often fixed to the cover 11 by riveting and folding. The folded part is easy to form a rounded corner, and a gap is easy to be generated when the rounded corner contacts the sealing cover 40. This makes it difficult to set the sealing cover 40 by welding or other fixed connections. Even if the sealing cover 40 is fixed to the pole 20, it is difficult to ensure the sealing effect of the injection hole 21.

[0063] The pole body 201 of the pole 20 of the present application is provided with a connector 30 on the side away from the cover plate 11, and the through hole 31 of the connector 30 is connected with the injection hole 21, and the through hole 31 is sealed by the sealing cover 40, and the injection hole 21 is sealed by the sealing cover 40 on the connector 30. Along the length direction perpendicular to the pole body 201, the size of the connector 30 is larger than the size of the pole body 201. Compared with the sealing connection between the sealing cover 40 and the pole body 201 with a smaller size and a complex structure, the sealing connection between the sealing cover 40 and the connector 30 is easier to achieve, thereby facilitating the assembly of the sealing cover 40 and the pole 20. The contact area between the sealing cover 40 and the connector 30 is larger than the contact area between the sealing cover 40 and the pole body 201, thereby improving the sealing effect of the injection hole 21.

[0064] See also Figure 4 and Figure 5 ,in, Figure 4 This is a schematic diagram of the exploded structure of a battery cell housing 100 provided in one embodiment of the present application; Figure 5 It is a structural schematic diagram of a battery cell cover plate 10 provided in an embodiment of the present application.

[0065] The battery cell cover plate 10 of the present application includes a cover plate 11, a pole 20 and a sealing cover 40, wherein the pole 20 is embedded in the cover plate 11 and partially located on the outside of the cover plate 11, the injection hole 21 and the through hole 31 of the pole 20 are connected to both sides of the cover plate 11, and the sealing cover 40 is used to seal the through hole 31 away from the end of the cover plate 11.

[0066] The connector 30 of the pole 20 of the cell cover 10 of the present application is located on the outside of the cover 11, and the electrical equipment can be electrically connected to the pole 20 through the connector 30, so that the cell assembly on the other side of the cell cover 10 can be connected to the electrical equipment through the pole 20, thereby realizing the power supply of the electrical equipment. The present application also provides a cell housing 100, the cell housing 100 includes a shell 12 and a cell cover 10, the shell 12 includes a receiving cavity 13 with an opening, the cell cover 10 covers the opening, the first end 26 of the pole 20 of the cell cover 10 is located on the side of the cover body 11 away from the receiving cavity 13, and the injection hole 21 of the pole 20 is connected to the receiving cavity 13.

[0067] Specifically, in one embodiment, Figure 4 and Figure 5 As shown, the shell 12 is columnar, and the two battery cover plates 10 are respectively located on opposite sides of the shell 12. The shell 12 and the two battery cover plates 10 enclose a sealed accommodating cavity 13. A pole 20 is embedded on each battery cover plate 10, and the two poles 20 are respectively electrically connected to the positive and negative poles of the electrical equipment.

[0068] The battery cell housing 100 of the present application forms a receiving cavity 13 for receiving electrolyte, and an injection hole 21 is connected to the receiving cavity 13 at one end and connected to the outside at the other end, so that the electrolyte can be injected into the receiving cavity 13 through the injection hole 21, thereby replenishing the electrolyte for the battery cell.

[0069] It should be pointed out that the pole 20 of the present application can be used not only in the battery cover 10 and the battery housing 100, but also in other cavity structures that need to be sealed or structures with holes, and has a better sealing effect.

[0070] The present application also provides a battery cell, which includes a battery cell assembly and the above-mentioned pole 20, and the pole 20 is used to electrically connect the battery cell assembly; or includes a battery cell assembly and the above-mentioned battery cell cover 10, and the pole 20 of the battery cell cover 10 is used to electrically connect the battery cell assembly; or the battery cell includes a battery cell assembly and the above-mentioned battery cell casing 100, the battery cell assembly is located in the accommodating cavity 13 of the battery cell casing 100, and the pole 20 of the battery cell casing 100 is used to electrically connect the battery cell assembly.

[0071] The present application also provides a battery, which includes a battery casing and the above-mentioned battery cell, and the battery cell is located in an inner cavity of the battery casing.

[0072] The present application also provides an electric energy device, which includes the above-mentioned battery cell or the above-mentioned battery, and the battery cell or the battery is used to supply power to the electric energy device.

[0073] It can be understood that the electrical energy equipment of the present application includes but is not limited to one or more of vehicles, aircraft, ships, energy storage equipment or energy-storing household appliances.

[0074] See also Figure 6-Figure 8 ,in Figure 6 A schematic cross-sectional structure diagram of a portion of a cell cover plate 10 provided in an embodiment of the present application is shown; Figure 7 A schematic diagram of the structure of a pole body 201 before installation provided in an embodiment of the present application is shown; Figure 8 A schematic cross-sectional structure diagram of a pole body 201 before installation provided in an embodiment of the present application is illustrated.

[0075] In one embodiment, a portion of the pole body 201 is located in the through hole 31, and the outer peripheral surface of the pole body 201 includes a first step 27, which is used to form a first abutment surface 22, and the first abutment surface 22 faces away from the cover plate 11. The first abutment surface 22 is in contact with the connector 30 to limit the displacement between the pole body 20 and the connector 30 along the length direction of the pole body 201.

[0076] In one embodiment, if Figure 7 and Figure 8As shown, the first step 27 on the outer circumference of the pole body 201 forms a first abutting surface 22, and the first abutting surface 22 faces away from the accommodating cavity 13. Figure 6 As shown, the pole body 201 extends into the through hole 31 , the first abutting surface 22 is in contact with the end surface of the connector 30 facing the cover plate 11 , and the displacement between the connector 30 and the pole 20 along the length direction of the pole body 201 can be limited by the first abutting surface 22 .

[0077] In addition, during the fixed connection between the pole body 201 and the connector 30, the first step 27 can prevent the connector 30 from directly contacting the cover plate 11, thereby preventing the connector 30 from damaging the cover plate 11. For example, the pole body 201 is fixedly connected to the connector 30 by riveting. During the riveting process of the pole body 201, the connector 30 may contact the cover plate 11 and exert a force along the length direction of the pole body 201 on the cover plate 11, thereby damaging the cover plate 11. The first step 27 can limit the connector 30 through the first abutting surface 22, thereby preventing the connector 30 from contacting the cover plate 11.

[0078] See also Fig. 9 and Fig.10 ,in Fig. 9 This is a schematic structural diagram of a connecting member 30 provided in one embodiment of the present application; Fig.10 It is a schematic cross-sectional structure diagram of a connecting member 30 provided in an embodiment of the present application.

[0079] In one embodiment, a first end portion 26 of the pole body 20 extending into the through hole 31 is provided with a protrusion 25, and the protrusion 25 extends toward the inner circumference of the through hole 31. The inner circumference of the through hole 31 includes a second step 314, and the second step 314 is used to form a second abutment surface 311. The second abutment surface 311 faces away from the cover plate 11, and the second abutment surface 311 is in contact with the protrusion 25 to limit the displacement between the pole body 201 and the connector 30 along the length direction of the pole body 201.

[0080] In one embodiment, if Figure 6 As shown, the pole body 201 extends into the through hole 31, and the outer circumference of the pole 20 located in the through hole 31 is provided with a protrusion 25, and the protrusion 25 extends toward the inner circumference of the through hole 31. Fig. 9 and Fig.10 As shown, the through hole 31 includes a second step 314, the second step 314 forms a second abutting surface 311, the second abutting surface 311 faces away from the cover plate 11, the second abutting surface 311 is in contact with the protrusion 25, and the displacement between the connecting member 30 and the pole body 201 along the length direction of the pole body 201 can be limited by the second abutting surface 311 and the protrusion 25.

[0081] In one embodiment, the protrusion 25 of the pole body 201 can be arranged on the end surface of one end of the pole body 201 located in the through hole 31, that is, the protrusion 25 is located on the end surface of the first end 26, and the protrusion 25 extends toward the inner circumferential surface of the through hole 31 and fits with the second abutment surface 311, which can also limit the displacement between the pole body 201 and the connecting member 30 along the length direction of the pole body 201.

[0082] In some embodiments, one end of the pole body 201 extends into the through hole 31, that is, the first end 26 extends into the through hole 31. When the first end 26 extends into the through hole 31 and reaches a predetermined position, the first end 26 can be folded by riveting or the like to form a protrusion 25, and the protrusion 25 formed after folding faces the inner circumference of the through hole 31 and fits with the second abutting surface 311, which can also limit the displacement between the pole body 201 and the connector 30 along the length direction of the pole body 201.

[0083] In one embodiment, the first end 26 of the pole body 201 extends into the through hole 31, and the end face of the first end 26 of the pole body 201 is located on the side of the second abutting surface 311 away from the cover plate 11. The first end 26 of the pole body 201 extending into the through hole 31 is deformed by riveting to form a first end 26 with a larger cross-section. The first end 26 can be fitted with the second abutting surface 311 to limit the displacement between the pole body 201 and the connector 30 along the length direction of the pole body 201.

[0084] It is understandable that the larger the cross section of the deformed first end 26 is, the larger the contact area between the pole 20 and the connector 30 is, and the better the sealing effect is. At the same time, the cross section of the deformed first end 26 is consistent with the cross section of the through hole 31, which can also achieve a better sealing effect.

[0085] In one embodiment, the first abutting surface 22 is fitted with the connecting member 30 to form a lower limit of the pole body 201 and the connecting member 30, and the second abutting surface 311 is fitted with the protrusion 25 to form an upper limit of the pole body 201 and the connecting member 30, thereby better limiting the displacement between the pole body 201 and the connecting member 30 along the length direction of the pole body 201.

[0086] In one embodiment, the sealing cover 40 is partially located in the through hole 31, and the inner circumferential surface of the through hole 31 includes a third step 315, the third step 315 is located on the side of the second step 314 away from the cover plate 11, the third step 315 forms a third abutting surface 312, the third abutting surface 312 faces in a direction away from the cover plate 11, and the third abutting surface 312 is in contact with the sealing cover 40.

[0087] In one embodiment, if Fig. 9 and Fig.10As shown, the inner circumference of the through hole 31 includes a third step 315, and the third step 315 forms a third abutting surface 312, and the third abutting surface 312 faces away from the accommodating cavity 13. And the third abutting surface 312 is located on the side of the second abutting surface 311 away from the accommodating cavity 13. Figure 5 As shown, one end of the sealing cover 40 extends into the through hole 31 , and the end surface of the sealing cover 40 fits against the third abutting surface 312 , which can increase the contact area between the sealing cover 40 and the connector 30 and improve the sealing effect between the sealing cover 40 and the connector 30 .

[0088] In one embodiment, if Fig.10 As shown, along the direction away from the cover plate 11, the cross-section of the through hole 31 located on the side of the third abutting surface 312 away from the second abutting surface 311 gradually increases, so that the through hole 31 has an inclined inner wall 313. The inclined inner wall 313 can cause the sealing cover 40 to deform when it is attached to the third abutting surface 312, thereby improving the sealing effect between the sealing cover 40 and the connecting member 30.

[0089] In one embodiment, if Figure 6 As shown, the battery cover 10 includes a sealing nail 90, which includes a first section with a larger cross-section and a second section with a smaller cross-section. A gap is left between the second abutting surface 311 and the third abutting surface 312, and the gap is used to accommodate the first section of the sealing nail 90. The second section of the sealing nail 90 extends into and fills the injection hole 21 to seal the injection hole 21, thereby realizing secondary sealing of the injection hole 21 and improving the sealing effect of the injection hole 21.

[0090] In one embodiment, the cover plate 11 includes a mounting hole 113 , the pole body 201 passes through the mounting hole 113 , the pole body 201 includes a limiting portion 23 , the limiting portion 23 is located on the side of the cover plate 11 away from the connector 30 , and the cross-sectional size of the limiting portion 23 is larger than the size of the mounting hole 113 .

[0091] In one embodiment, if Figure 4 As shown, the pole body 20 is fixed on the cover plate 11, and the cover plate 11 is provided with a mounting hole 113. One end of the pole body 201 is located on one side of the cover plate 11, and the other end passes through the mounting hole 113 and extends out of the cover plate 11 to connect with the connector 30. Figure 7 As shown, a limiting portion 23 is provided at one end of the pole 20 located in the accommodating cavity 13, and the cross-sectional size of the limiting portion 23 is larger than the size of the mounting hole 113, so that at least part of the pole body 201 is located on the side of the cover plate 11 away from the connecting member 30, thereby limiting the displacement of the pole body 201 along the length direction of the pole body 201, and preventing the pole body 201 from passing through the cover plate 11. At the same time, the limiting portion 23 can also cooperate with the connecting member 30 to limit the relative position of the pole body 201 and the cover plate 11, so that the pole body 201 is fixed on the cover plate 11.

[0092] See also Fig.11 A schematic diagram of the structure of a sealing ring 50 provided in an embodiment of the present application is shown.

[0093] In one embodiment, a sealing ring 50 is provided between the limiter 23 and the cover plate 11 along the length direction of the pole body. The sealing ring 50 seals and connects the limiter 23 and the cover plate 11 to prevent the electrolyte from leaking from the gap between the pole body 201 and the cover plate 11.

[0094] In one embodiment, if Figure 5 and Fig.11 As shown, along the length direction of the pole body 201, a sealing ring 50 is provided between the limiting portion 23 and the cover plate 11. The sealing ring 50 is sleeved on the outside of the pole body 201. The sealing ring 50 is used to seal the connection between the pole body 201 and the cover plate 11, and can also prevent the electrolyte from leaking from the gap between the pole body 201 and the cover plate 11.

[0095] In one embodiment, along the length direction of the pole body 201 , the gap distance between the limiting portion 23 and the cover plate 11 is smaller than the axial distance of the sealing ring 50 , so as to achieve a better sealing effect between the cover plate 11 and the limiting portion 23 .

[0096] In one embodiment, if Figure 6 As shown, along the length direction perpendicular to the pole body 201, a gap is left between the mounting hole 113 and the pole body 201, and the sealing ring 50 is arranged in the gap between the mounting hole 113 and the pole body 201. The sealing ring 50 fills the gap between the inner circumference of the mounting hole 113 and the outer circumference of the pole body 201, further ensuring the sealing effect between the limiting part 23 and the cover plate 11, and preventing the electrolyte from leaking from the gap between the pole body 201 and the cover plate 11.

[0097] In one embodiment, if Figure 6 As shown, the cover plate 11 includes an insulating layer 80, which is located between the cover plate 11 and the connector 30. The insulating layer 80 is sleeved on the outside of the pole body 201, and is used to isolate the connector 30 from the cover plate 11 to prevent electrical conduction between the cover plate 11 and the connector 30.

[0098] In one embodiment, the insulating layer 80 extends into the gap between the mounting hole 113 and the pole body 201 and contacts the sealing ring 50 , thereby separating the pole body 201 from the cover plate 11 , thereby improving the insulation effect of the cover plate 11 .

[0099] See also Fig.12 A schematic diagram of the structure of a partial spacer ring 70 provided in an embodiment of the present application is shown.

[0100] In one embodiment, if Figure 4 and Fig.12 As shown, the cover plate 11 includes a spacer 70, which is located on the side of the cover plate 11 away from the connector 30. The spacer 70 is sleeved on the outside of the pole body 201. The pole body 201 passes through the through hole 71 of the spacer 70 to separate the limiting portion 23 and the cover plate 11, thereby improving the insulation effect of the cover plate 11.

[0101] In one embodiment, if Figure 4 As shown, the cover plate 11 is provided with a first blasting hole 111 and a second blasting hole 72. The first blasting hole 111 penetrates the cover plate 11 along the thickness direction of the cover plate 11, and the second blasting hole 72 penetrates the spacer ring 70 along the thickness direction of the spacer ring 70. A blasting cover 112 is provided in the first blasting hole 111, and the blasting cover 112 shields the first blasting hole 111. A blasting piece 73 is provided in the second blasting hole 72, and the blasting piece 73 is used to discharge the gas in the accommodating cavity 13 to prevent the pressure in the accommodating cavity 13 from being too high, resulting in failure of the sealing of the battery cell casing 100.

[0102] See also Fig.13 A schematic diagram of the structure of a lead-out piece 60 provided in one embodiment of the present application is shown.

[0103] In one embodiment, a battery cell assembly is disposed in the accommodating cavity 13 , and the battery cell assembly is electrically connected to an end of the pole body 201 away from the connecting piece 30 .

[0104] In another embodiment, if Figure 4 and Fig.13 As shown, the cell cover plate 10 includes a lead-out sheet 60, and the lead-out sheet 60 is provided with a connecting hole 61 penetrating along the thickness direction, and the connecting hole 61 is located in the accommodating cavity 13. The pole body 201 passes through the connecting hole 61 and is fixedly connected to the lead-out sheet 60, and the pole body 201 is connected to the cell assembly through the lead-out sheet 60. The pole body 201 is electrically connected to the cell assembly through the lead-out sheet 60, and the lead-out sheet 60 is partially located outside the accommodating cavity 13. The lead-out sheet 60 can be electrically connected to the lead-out sheet 60 of other cells, and then multiple cells are connected to realize that multiple cells are powered for the same electrical device.

[0105] In one embodiment, if Figure 4 and Figure 8 As shown, a fourth step 28 is provided at one end of the pole body 201 away from the connecting piece 30, and the fourth step 28 is concave to form a fourth abutting surface 24, and the fourth abutting surface 24 is in contact with the lead-out piece 60, so as to facilitate fixing the lead-out piece 60 on the pole body 201. The fourth abutting surface 24 can limit the displacement of the pole body 201 and the lead-out piece 60 along the length direction of the pole body 201.

[0106] See also Figure 14-16 ,in, Fig.14This is a structural schematic diagram of a cell cover plate 10 provided in another embodiment of the present application; Fig.15 This is a schematic structural diagram of a connecting member 30 provided in another embodiment of the present application; Fig.16 Schematic diagram of the structure of an insulating layer 80 provided in another embodiment of the present application.

[0107] In one embodiment, the cover plate 11 includes an insulating layer 80, which is fixed to the side of the cover plate 11 facing the connector 30. The insulating layer 80 is provided with a stop hole 81. The connector 30 is at least partially located in the stop hole 81. The outer contour of the connector 30 cooperates with the inner circumference of the stop hole 81 to limit the relative rotation between the connector 30 and the cover plate 11.

[0108] In one embodiment, if Fig.14 and Fig.15 As shown, the cross-section of the outer circumferential surface of the connector 30 is non-circular, the cross-section of the anti-rotation hole 81 of the insulating layer 80 is also non-circular, and the shapes of the two cross-sections are the same. One end of the connector 30 is embedded in the anti-rotation hole 81 of the insulating layer 80 to limit the relative rotation between the connector 30 and the insulating layer 80.

[0109] In one embodiment, the inner circumferential cross-section of the through hole 31 is non-circular, the outer circumferential cross-section of the pole body 201 is non-circular, and the shapes of the two cross-sections are the same. The first end 26 of the pole body 201 extends into the through hole 31 to limit the relative rotation between the connector 30 and the pole body 201.

[0110] In another embodiment, one end of the connector 30 is embedded in the stop hole 81 of the insulating layer 80, and the first end 26 of the pole body 201 extends into the through hole 31, thereby limiting the relative rotation between the connector 30 and the insulating layer 80 and between the connector 30 and the pole body 201, thereby preventing the connector 30 from rotating.

[0111] See also Fig.17 A schematic cross-sectional structure diagram of a portion of a cell cover plate 10 provided in another embodiment of the present application is shown.

[0112] In one embodiment, if Fig.17 As shown, the spacer 70 includes a positioning portion 74 , which extends toward the cover plate 11 and contacts the cover plate 11 , so that during the assembly process of the battery cell cover plate 10 , the spacer 70 is positioned with the cover plate 11 through the positioning portion 74 .

[0113] In another embodiment, part of the positioning portion 74 extends into the mounting hole 113 of the cover body 11 , so that the spacer 70 can also be positioned relative to the cover body 11 through the positioning portion 74 .

[0114] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A pole (20), characterized in that: It comprises a pole body (201) and a connecting piece (30); the pole body (201) is embedded in a cover plate (11); a portion of the pole body (201) is located outside the cover plate (11); the pole body (201) is provided with a liquid injection hole (21); the liquid injection hole (21) penetrates the pole body (201) along the length direction of the pole body (201); The connecting piece (30) is located on a side of the pole body (201) extending out of the cover plate (11); along a length direction perpendicular to the pole body (201), the size of the connecting piece (30) is larger than the size of the pole body (201); the connecting piece (30) comprises a through hole (31); the through hole (31) is connected to the injection hole (21); a sealing cover (40) is provided at one end of the through hole (31) away from the cover plate (11); the sealing cover (40) is used to seal the through hole (31).

2. The pole (20) according to claim 1, characterized in that: The pole body (201) is partially located in the through hole (31); the outer peripheral surface of the pole body (201) comprises a first step (27); the first step (27) is used to form a first abutting surface (22); the first abutting surface (22) faces in a direction away from the cover plate (11); the first abutting surface (22) is in contact with the connecting piece (30) to limit the displacement between the pole body (201) and the connecting piece (30) along the length direction of the pole body (201).

3. The pole (20) according to claim 2, characterized in that: A protrusion (25) is provided at the first end portion (26) of the pole body (201) extending into the through hole (31), and the protrusion (25) extends toward the inner circumference of the through hole (31). The inner circumference of the through hole (31) includes a second step (314). The second step (314) is used to form a second abutting surface (311). The second abutting surface (311) faces in a direction away from the cover plate (11). The second abutting surface (311) is in contact with the protrusion (25) to limit the displacement between the pole body (201) and the connecting member (30) along the length direction of the pole body (201).

4. The pole (20) according to claim 3, characterized in that: The sealing cover (40) is partially located in the through hole (31); the inner peripheral surface of the through hole (31) comprises a third step (315); the third step (315) is located on a side of the second step (314) away from the cover plate (11); the third step (315) is used to form a third abutting surface (312); the third abutting surface (312) faces in a direction away from the cover plate (11); and the third abutting surface (312) is in contact with the sealing cover (40).

5. The pole (20) according to claim 1, characterized in that: The cover plate (11) comprises an insulating layer (80), wherein the insulating layer (80) is fixed to the side of the cover plate (11) facing the connecting member (30), and the insulating layer (80) is provided with a stop hole (81), wherein the connecting member (30) is at least partially located in the stop hole (81), and the outer contour of the connecting member (30) cooperates with the inner circumference of the stop hole (81) to limit the relative rotation between the connecting member (30) and the cover plate (11).

6. The pole (20) according to any one of claims 1 to 5, characterized in that: The cover plate (11) comprises a mounting hole (113), the pole body (201) passes through the mounting hole (113), the pole body (201) comprises a limiting portion (23), the limiting portion (23) is located on a side of the cover plate (11) away from the connecting member (30), and the cross-sectional size of the limiting portion (23) is greater than the size of the mounting hole (113).

7. The pole (20) according to claim 6, characterized in that: Along the length direction of the pole body (201), a sealing ring (50) is provided between the limiting portion (23) and the cover plate (11).

8. The pole (20) according to claim 7, characterized in that: Along a length direction perpendicular to the pole body (201), a gap is left between the mounting hole (113) and the pole body (201), and the sealing ring (50) is arranged in the gap between the mounting hole (113) and the pole (20).

9. A battery cell cover plate (10), characterized in that: The invention comprises a cover plate (11), a sealing cover (40) and a pole (20) as claimed in any one of claims 1 to 8, wherein the pole (20) is embedded in the cover plate (11) and is partially located outside the cover plate (11), the injection hole (21) and the through hole (31) of the pole (20) are connected to both sides of the cover plate (11), and the sealing cover (40) is used to seal the through hole (31) away from the end of the cover plate (11).

10. A battery cell casing (100), characterized in that: Comprising a shell (12), a cover plate (11) and a sealing cover (40), and the pole (20) according to any one of claims 1 to 8, the shell (12) comprising a receiving cavity (13) having an opening, the cover plate (11) shielding the opening, and the injection hole (21) of the pole (20) communicating with the receiving cavity (13); or It comprises a shell (12) and a cell cover plate (10) as claimed in claim 9, wherein the shell (12) comprises a receiving cavity (13) having an opening, the cell cover plate (10) covers the opening, and the injection hole (21) of the pole (20) is connected to the receiving cavity (13).

11. A battery cell, characterized in that: Comprising a battery cell assembly and the pole (20) according to any one of claims 1 to 8, wherein the pole (20) is used to electrically connect the battery cell assembly; or Comprising a battery cell assembly and the battery cell cover plate (10) according to claim 9, wherein the pole (20) of the battery cell cover plate (10) is used to electrically connect the battery cell assembly; or It comprises a battery cell assembly and a battery cell casing (100) as claimed in claim 10, wherein the battery cell assembly is located in a receiving cavity (13) of the battery cell casing (100), and a pole (20) of the battery cell casing (100) is used to electrically connect the battery cell assembly.

12. The battery cell according to claim 11, characterized in that: The cell cover plate (10) comprises a lead-out plate (60), the lead-out plate (60) being provided with a connecting hole (61) penetrating along the thickness direction, the connecting hole (61) being located in the accommodating cavity (13), the pole (20) passing through the connecting hole (61) and being fixedly connected to the lead-out plate (60), the pole (20) being connected to the cell assembly via the lead-out plate (60).

13. A battery, characterized in that: It comprises a battery casing and the battery core as claimed in claim 11, wherein the battery core is located in the inner cavity of the battery casing.

14. An electric energy device, characterized in that: Comprising the battery cell according to claim 11, wherein the battery cell is used for powering the electric energy device; or The invention comprises the battery as claimed in claim 13, wherein the battery is used for supplying power to the electric energy device.

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