CN222654292U - Pole, cell cover, cell casing, cell, battery and electrical equipment - Google Patents

Abstract

The application relates to a pole, a battery core cover plate, a battery core shell, a battery core, a battery and electric energy equipment, wherein the pole comprises a pole body and connecting ribs; the connecting piece is located pole body and stretches out apron one side, along the length direction of perpendicular to pole body, and the size of connecting piece is greater than the size of pole body, and the connecting piece includes the through-hole, through-hole and annotates the liquid hole intercommunication, and the through-hole is kept away from apron one end and is equipped with sealed lid, and sealed lid is used for sealed through-hole. The connecting piece is arranged on one side of the pole far away from the cover plate, the liquid injection hole is sealed through the sealing cover on the connecting piece, the sealing cover is convenient to assemble, the size of the connecting piece is larger than that of the pole body, the contact area between the sealing cover and the connecting piece is larger than that between the sealing cover and the pole body, and the sealing effect of the liquid injection hole is further improved.

Description

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

Technical Field

The application relates to the field of polar posts, in particular to a polar post, a battery core cover plate, a battery core shell, a battery core, a battery and electric energy equipment.

Background

Be equipped with the notes liquid hole on the electric core apron, pour into the inside of electric core shell through annotating the liquid hole with electrolyte, current electric core apron will annotate the liquid hole and set up on the utmost point post to annotate the liquid hole on the sealed utmost point post through sealed lid.

The pole has a complex structure and is easy to deform under stress, so that the contact surface between the pole and the sealing cover is complex, the pole and the sealing cover are difficult to assemble, the size of the pole is small, the contact area between the pole and the sealing cover is small, and the sealing effect of the liquid injection hole is difficult to ensure. Meanwhile, in order to ensure the strength of the pole, the structural size of the pole needs to be increased, so that the cost is increased and a large space is occupied.

Disclosure of utility model

In view of the above-mentioned technical problems, an object of the present application is to provide an easily sealed pole, a battery cell cover plate including the pole, a battery cell housing including the pole or the battery cell cover plate, a battery cell including the pole, the battery cell cover plate or the battery cell housing, a battery including the battery cell, and an electrical energy device including the battery cell or the battery cell, which specifically include the following technical schemes:

in a first aspect, an embodiment of the application provides a pole, which comprises a pole body and a connecting rib, wherein the pole body is embedded in a cover plate, a part of the pole body is positioned at the outer side of the cover plate, the pole body is provided with a liquid injection hole, the liquid injection hole penetrates through the pole body along the length direction of the pole body, a connecting piece is positioned at one side of the pole body extending out of the cover plate and is larger than the size of the pole body along 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, one end of the through hole, which is far away from the cover plate, is provided with a sealing cover, and the sealing cover is used for sealing the through hole.

The electrode body of the electrode is provided with the liquid injection hole, the connecting piece is provided with the through hole, the liquid injection hole penetrates through the electrode body along the length direction, and one end of the electrode body is positioned at the outer side of the cover plate, so that electrolyte can be injected through the liquid injection hole of the electrode body and the through hole of the connecting piece.

The connecting piece is arranged on one side, far away from the cover plate, of the pole body of the pole, the through hole of the connecting piece is communicated with the liquid injection hole, the through hole is sealed by the sealing cover, and the liquid injection hole is sealed by the sealing cover on the connecting piece. Along the length direction of perpendicular to utmost point post body, the size of connecting piece is greater than the size of utmost point post body, compares in sealed lid and the sealing connection of the little and complicated utmost point post body of size, and sealing connection between sealed lid and the connecting piece is realized more easily, and then the equipment of sealed lid and utmost point post of being convenient for. The contact area between the sealing cover and the connecting piece is larger than the contact area between the sealing cover and the pole body, and then the sealing effect of the liquid injection hole is improved.

In addition, the pole of the application seals the liquid injection hole through the connecting piece and the sealing cover, thereby reducing the structural size required by the pole body, lowering the cost of the pole and improving the space utilization rate.

In one embodiment, the pole body portion is located in the through hole, the outer peripheral surface of the pole body includes a first step for forming a first abutment surface facing away from the cover plate, the first abutment surface being attached to the connecting member to limit displacement between the pole body and the connecting member along a length direction of the pole body.

In this embodiment, the pole body stretches into in the through-hole, and the pole body outer peripheral face is equipped with first step, and the first face of holding that forms of first step is laminated with the one end of connecting piece, and then restricts the distance between pole body and the connecting piece, prevents connecting piece and apron direct contact, and the fixed connection between the pole body and the connecting piece of being convenient for.

In one embodiment, the end of the pole body extending into the through hole is provided with a protruding portion, the protruding portion extends towards the inner peripheral surface of the through hole, the inner peripheral surface of the through hole comprises a second step, the second step forms a second abutting surface, the second abutting surface faces away from the direction of the cover plate, and the second abutting surface is attached to the protruding portion so as to limit displacement between the pole body and the connecting piece along the length direction of the pole body.

In this embodiment, the portion that the utmost point post body stretches into in the through-hole is equipped with the bulge, and the bulge is laminated with the second that the second step of through-hole inner peripheral surface formed and is held the face, and then restricts the distance between utmost point post body and the connecting piece, prevents connecting piece and apron direct contact, and can be convenient for fix between utmost point post body and the connecting piece. Meanwhile, the second abutting surface of the second step can be matched with the first abutting surface of the first step so as to limit the relative position between the pole body and the connecting piece.

In one embodiment, the sealing cover part is located in the through hole, the inner peripheral surface of the through hole comprises a third step, the third step is located on one side, away from the cover plate, of the second step, the third step is used for forming a third abutting surface, the third abutting surface faces away from the cover plate, and the third abutting surface is attached to the sealing cover.

In this embodiment, seal lid part stretches into in the through-hole, and the third that seal lid and the interior third step of through-hole formed supports and holds the face laminating, and then restricts the distance between seal lid and the connecting piece, simultaneously, seal lid and the mutual support of third step hold, can increase the area of contact between seal lid and the connecting piece, improve the sealed effect of annotating the liquid hole.

In one embodiment, the cover plate comprises an insulating layer, the insulating layer is fixed on one side of the cover plate facing the connecting piece, the insulating layer is provided with a rotation stopping hole, the connecting piece is at least partially positioned in the rotation stopping hole, and the outer contour of the connecting piece is matched with the inner peripheral surface of the rotation stopping piece so as to limit the relative rotation of the connecting piece and the cover plate.

In this embodiment, the insulating layer is fixed to the cover plate, at least part of the connecting piece is located in the rotation stopping hole of the insulating layer, and the outer contour of the connecting piece is matched with the inner peripheral surface of the rotation stopping hole, so that the relative rotation of the connecting piece relative to the insulating layer can be limited, and the relative rotation of the connecting piece and the cover plate can be further limited. Meanwhile, the insulating layer can also separate the cover plate from the connecting piece, so that the cover plate is prevented from being electrified due to direct contact between the connecting piece and the cover plate.

In one embodiment, the cover plate comprises a mounting hole, the pole body passes through the mounting hole, the pole body comprises a limiting part, the limiting part is positioned on one side of the cover plate away from the connecting piece, and the cross-sectional dimension of the limiting part is larger than the size of the mounting hole.

In this embodiment, the utmost point post body includes that the cross-sectional dimension is greater than the spacing portion of mounting hole size, and spacing portion is located apron and keeps away from connecting piece one side, and then the axial displacement of restriction utmost point post body avoids the orientation motion of utmost point post body towards the connecting piece in order to pass the apron. Meanwhile, the limiting part can be matched with the connecting piece to limit the relative position of the pole and the shell, so that the pole is fixed on the shell.

In one embodiment, a sealing ring is arranged between the limiting part and the cover plate along the axial direction of the pole body.

In this embodiment, along the axial direction of the post, a gap is left between the limiting portion and the cover plate, and the limiting portion and the cover plate are connected in a sealing manner by arranging a sealing ring between the limiting portion and the cover plate, so that electrolyte is prevented from leaking out from the gap between the post body and the cover plate.

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 disposed in the gap between the mounting hole and the pole body.

In this embodiment, the clearance between mounting hole inner peripheral face and the utmost point post body outer peripheral face is filled to the sealing washer, further guarantees the sealed effect between spacing portion and the apron, prevents that electrolyte from spilling by the clearance between utmost point post body and the apron.

In a second aspect, the embodiment of the application further provides a battery core cover plate, which comprises a cover plate, a sealing cover and the polar post, wherein the polar post is embedded in the cover plate and is partially positioned at the outer side of the cover plate, a liquid injection hole and a through hole of the polar post are communicated with two sides of the cover plate, and the sealing cover is used for sealing one end of the through hole away from the cover plate.

In a third aspect, an embodiment of the present application provides a battery cell casing, including a housing, a cover plate, a sealing cover, and the above-mentioned pole, where the housing includes a housing cavity with an opening, the cover plate covers the opening, and a liquid injection hole of the pole communicates with the housing cavity, or includes a housing and the above-mentioned battery cell cover, where the housing includes a housing cavity with an opening, the battery cell cover plate covers the opening, and the liquid injection hole of the pole communicates with the housing cavity.

It can be appreciated that the battery cell shell and the battery cover plate of the application are convenient for the assembly of the sealing cover and can have better sealing effect because of adopting the polar post. The application also provides a battery cell, which comprises a battery cell assembly and the polar post, wherein the polar post is used for being electrically connected with the battery cell assembly, or comprises the battery cell assembly and the battery cell cover plate, the polar post of the battery cell cover plate is used for being electrically connected with the battery cell assembly, or comprises the battery cell assembly and the battery cell shell, the battery cell assembly is positioned in a containing cavity of the battery cell shell, and the polar post of the battery cell shell is used for being electrically connected with the battery cell assembly.

It can be appreciated that the battery cell of the application adopts the pole or the battery cell cover plate or the battery cell shell, so that the battery cell is convenient for the assembly of the sealing cover, the sealing of the containing cavity is easier to realize, the battery cell has better sealing performance, and the electrolyte leakage in the containing cavity can be avoided.

In one embodiment, the cell cover plate comprises a lead-out plate, the lead-out plate is provided with a through connecting hole along the thickness direction, the connecting hole is positioned in the accommodating cavity, the pole penetrates through the connecting hole and is fixedly connected with the lead-out plate, and the pole is communicated with the cell assembly through the lead-out plate.

In this embodiment, the terminal is electrically connected with the electric core component through the lead-out piece, and the lead-out piece is partially located at the outer side of the accommodating cavity, and the lead-out piece can be electrically connected with the lead-out pieces of other electric core shells, so that the plurality of electric cores are connected, and power supply of the plurality of electric cores for the same electric equipment is achieved.

In a fifth aspect, an embodiment of the present application further provides a battery, where the battery includes a battery housing and the foregoing electrical core, and the electrical core is located in an inner cavity of the battery housing.

In a sixth aspect, an embodiment of the present application further provides an electrical energy device, where the electrical energy device includes the foregoing electrical core or the foregoing battery, and the electrical core or the battery is used for power supply of the electrical energy device.

In the same way, the battery and the electric energy equipment adopt the pole of the application, so that the assembly of the sealing cover is convenient, the sealing of the containing cavity is easier to realize, the sealing performance is better, and the electrolyte in the containing cavity can be prevented from leaking.

Drawings

FIG. 1 is a schematic diagram of an exploded structure of a battery cell cover plate according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a battery cell cover according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a pole according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an exploded structure of a battery cell housing according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a battery cell cover plate according to an embodiment of the application;

FIG. 6 is a schematic cross-sectional view of a portion of a battery cell cover plate according to an embodiment of the application;

FIG. 7 is a schematic view of a post body before installation according to an embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a post body before installation according to one embodiment of the present application;

FIG. 9 is a schematic structural view of a connector according to an embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of a connector according to an embodiment of the present application;

FIG. 11 is a schematic view of a seal ring according to an embodiment of the present application;

FIG. 12 is a schematic view of a portion of a spacer provided in an embodiment of the present application;

FIG. 13 is a schematic view of a structure of a tab according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of a battery cell cover plate according to another embodiment of the present application;

FIG. 15 is a schematic view of a connector according to another embodiment of the present application;

FIG. 16 is a schematic view of an insulation layer according to another embodiment of the present application;

fig. 17 is a schematic cross-sectional structure of a portion of a battery cell cover according to another embodiment of the application.

Reference numerals:

100-cell casing, 10-cell cover plate, 11-cover plate, 111-first explosion hole, 112-explosion cover, 113-mounting hole, 12-shell, 13-containing cavity, 20-pole, 201-pole body, 21-injection hole, 22-first supporting surface, 23-limit part, 24-fourth supporting surface, 25-protruding part, 26-first end part, 27-first step, 28-fourth step, 30-connecting piece, 31-through hole, 311-second supporting surface, 312-third supporting surface, 313-inner side wall, 314-second step, 315-third step, 40-sealing cover, 50-sealing ring, 60-leading piece, 61-connecting hole, 70-spacing ring, 71-through hole, 72-second explosion hole, 73-rupture piece, 74-positioning part, 80-insulating layer, 81-rotation stopping hole and 90-sealing nail.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the application. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present application are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

The application provides a battery cell, which comprises a battery cell assembly and a battery cell housing 100, wherein the battery cell assembly is positioned in a containing cavity 13 of the battery cell housing 100, the battery cell assembly is electrically connected with a pole 20 on the battery cell housing 100, the pole 20 can be electrically connected with electric equipment, the battery cell assembly is communicated with the electric equipment, and the battery cell assembly is used for supplying power to the electric equipment.

Referring to fig. 1-3, fig. 1 illustrates an exploded structure of a battery cover 10 according to an embodiment of the present application, fig. 2 illustrates a cross-sectional structure of the battery cover 10 according to an embodiment of the present application, and fig. 3 illustrates a cross-sectional structure of a post 20 according to an embodiment of the present application.

The pole 20 of the application comprises a pole body 201 and a connecting piece 30, wherein the pole body 201 is embedded in the cover plate 11, a part of the pole body 201 is positioned at the outer side of the cover plate 11, the pole body 201 is provided with a liquid injection hole 21, and the liquid injection hole 21 penetrates through the pole body 201 along the length direction of the pole body 201.

Specifically, in one embodiment, as shown in fig. 1-3, the cover 11 is disc-shaped, the pole body 201 is embedded in the center of the cover 11, and referring to fig. 2 and 3, the length direction of the pole body 201 is parallel to the Y direction, the pole body 201 penetrates the cover 11 along the length direction of the pole body 201, and one end of the pole body 201 is located outside the cover 11, that is, the first end 26 is located outside the cover 11. The injection hole 21 penetrates through the pole body 201 along the length direction of the pole body 201, and two ends of the injection hole 21 are respectively communicated with two opposite sides of the cover plate 11.

The connecting piece 30 of the pole 20 is positioned on one side of the pole body 201 extending out of the cover plate 11, the size of the connecting piece 30 is larger than that of the pole body 201 along the direction perpendicular to the length direction of the pole body 201, the connecting piece 30 comprises a through hole 31, the through hole 31 is communicated with the liquid injection hole 21, a sealing cover 40 is arranged at one end, far away from the cover plate 11, of the through hole 31, and the sealing cover 40 is used for sealing the through hole 31.

Specifically, in one embodiment, as shown in fig. 2 and 3, the connection member 30 is located on one side of the pole body 201 and is provided with a through hole 31, that is, the connection member 30 is located on one side of the first end portion 26, and the first end portion 26 partially extends into the through hole 31 and is fixed to the connection member 30. The end of the through hole 31 away from the pole body 201 is provided with a sealing cover 40, and the sealing cover 40 is partially positioned in the through hole 31 to seal the through hole 31. Along the length direction of the pole body 201, the size of the connection member 30 is larger than the size of the pole body 201.

The electrode body 201 of the electrode 20 is provided with a liquid injection hole 21, the connecting piece 30 is provided with a through hole 31, the liquid injection hole 21 penetrates through the electrode body 201 along the length direction of the electrode body 201, one end of the electrode body 201 is positioned at the outer side of the cover plate 11, so that electrolyte can pass through the cover plate 11 through the liquid injection hole 21 of the electrode body 201 and the through hole 31 of the connecting piece 30.

In current utmost point post, the utmost point post is equipped with annotates the liquid hole and is used for supplying electrolyte, in order to guarantee the supplementary efficiency of electrolyte, and the notes liquid hole of utmost point post needs great size, simultaneously, in order to guarantee the sealed effect of annotating the liquid hole, needs great area of contact between utmost point post and the sealed lid, and this makes the overall dimension of utmost point post great, and weight is heavier, and space utilization is lower.

It will be appreciated that the pole 20 is often provided with a upsetting means, and that increasing the size of the pole 20 increases the manufacturing process difficulty of the pole 20 and increases the manufacturing cost of the pole 20.

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 cell cover plate, the pole 20 is often folded by riveting to be fixed on the cover plate 11, a round corner is easy to form at the folded part, and a gap is easy to be generated when the round corner contacts with the sealing cover 40, which makes the process of setting the sealing cover 40 by welding or other fixed connection difficult, and even if the sealing cover 40 is fixed on the pole 20, the sealing effect of the liquid injection hole 21 is difficult to be ensured.

The side of the pole body 201 of the pole 20, which is far away from the cover plate 11, is provided with a connecting piece 30, a through hole 31 of the connecting piece 30 is communicated with the liquid injection hole 21, the through hole 31 is sealed by a sealing cover 40, and the liquid injection hole 21 is sealed by the sealing cover 40 on the connecting piece 30. Along the length direction perpendicular to the pole body 201, the size of the connecting piece 30 is greater than the size of the pole body 201, and compared with the sealing connection of the sealing cover 40 and the pole body 201 with smaller size and complex structure, the sealing connection between the sealing cover 40 and the connecting piece 30 is easier to realize, so that the assembly of the sealing cover 40 and the pole 20 is facilitated. The contact area between the sealing cover 40 and the connecting member 30 is larger than the contact area between the sealing cover 40 and the pole body 201, thereby improving the sealing effect of the liquid injection hole 21.

Referring to fig. 4 and 5, fig. 4 is a schematic exploded view of a battery case 100 according to an embodiment of the application, and fig. 5 is a schematic view of a battery cover plate 10 according to an embodiment of the application.

The battery core cover plate 10 comprises a cover plate 11, a pole 20 and a sealing cover 40, wherein the pole 20 is embedded in the cover plate 11 and is partially positioned at the outer side of the cover plate 11, a liquid injection hole 21 and a through hole 31 of the pole 20 are communicated with two sides of the cover plate 11, and the sealing cover 40 is used for sealing one end of the through hole 31 far away from the cover plate 11.

The connecting piece 30 of the pole 20 of the battery cell cover plate 10 is positioned at the outer side of the cover plate 11, and the electric equipment can be electrically connected with the pole 20 through the connecting piece 30, so that a battery cell assembly at the other side of the battery cell cover plate 10 can be conducted with the electric equipment through the pole 20, and further the power supply of the electric equipment is realized. The application also provides a battery cell housing 100, the battery cell housing 100 comprises a shell 12 and a battery cell cover plate 10, the shell 12 comprises a containing cavity 13 with an opening, the battery cell cover plate 10 shields the opening, a first end 26 of a pole 20 of the battery cell cover plate 10 is positioned on one side of a cover plate body 11 away from the containing cavity 13, and a liquid injection hole 21 of the pole 20 is communicated with the containing cavity 13.

Specifically, in one embodiment, as shown in fig. 4 and fig. 5, the casing 12 is in a column shape, the two battery cell cover plates 10 are respectively located at two opposite sides of the casing 12, the casing 12 and the two battery cell cover plates 10 surround the sealed accommodating cavity 13, each battery cell cover plate 10 is embedded with a pole 20, and the two poles 20 are respectively electrically connected with the positive electrode and the negative electrode of the electric equipment.

The cell casing 100 of the application forms the accommodating cavity 13 for accommodating the electrolyte, one end of the electrolyte injection hole 21 is communicated with the accommodating cavity 13, and the other end is communicated with the outside, so that the electrolyte can be injected into the accommodating cavity 13 through the electrolyte injection hole 21, and the electrolyte is further replenished for the cell.

It should be noted that, the terminal 20 of the present application can be applied to the cell cover plate 10 and the cell housing 100, and is also applicable to other cavity structures or structures with holes that need to be sealed, and has better sealing effect.

The application also provides a battery cell, which comprises a battery cell assembly and the pole post 20, wherein the pole post 20 is used for electrically connecting the battery cell assembly, or comprises a battery cell assembly and the battery cell cover plate 10, the pole post 20 of the battery cell cover plate 10 is used for electrically connecting the battery cell assembly, or comprises a battery cell assembly and the battery cell shell 100, the battery cell assembly is positioned in the accommodating cavity 13 of the battery cell shell 100, and the pole post 20 of the battery cell shell 100 is used for electrically connecting the battery cell assembly.

The application also provides a battery, which comprises a battery shell and the battery core, wherein the battery core is positioned in the inner cavity of the battery shell.

The application also provides electric energy equipment, which comprises the electric core or the battery, wherein the electric core or the battery is used for supplying power to the electric energy equipment.

It is to be understood that the electrical energy devices of the present application include, but are not limited to, one or more of a vehicle, an aircraft, a watercraft, an energy storage device, or an energy storage appliance.

Referring to fig. 6-8, fig. 6 is a schematic cross-sectional structure of a portion of a battery cell cover plate 10 according to an embodiment of the application, fig. 7 is a schematic cross-sectional structure of a post body 201 before installation according to an embodiment of the application, and fig. 8 is a schematic cross-sectional structure of a post body 201 before installation according to an embodiment of the application.

In one embodiment, the pole body 201 is partially located in the through hole 31, the outer peripheral surface of the pole body 201 includes a first step 27, the first step 27 is used for forming a first abutting surface 22, the first abutting surface 22 faces away from the cover plate 11, and the first abutting surface 22 is abutted with the connecting piece 30 to limit displacement between the pole body 20 and the connecting piece 30 along the length direction of the pole body 201.

In one embodiment, as shown in fig. 7 and 8, the first step 27 of the outer peripheral surface of the pole body 201 forms a first abutment surface 22, the first abutment surface 22 facing away from the receiving cavity 13. Referring to fig. 6, the pole body 201 extends into the through hole 31, the first abutting surface 22 is attached to an end surface of the connecting piece 30 facing one end of the cover 11, and displacement between the connecting piece 30 and the pole 20 along the length direction of the pole body 201 can be limited by the first abutting surface 22.

In addition, during the process of fixedly connecting the pole body 201 and the connecting piece 30, the first step 27 can prevent the connecting piece 30 from directly contacting the cover plate 11, so as to prevent the connecting piece 30 from damaging the cover plate 11. For example, the pole body 201 is fixedly connected with the connecting piece 30 through riveting, in the process of riveting the pole body 201, the connecting piece 30 may contact with the cover plate 11, and force along the length direction of the pole body 201 is applied to the cover plate 11, so that the cover plate 11 is damaged, the connecting piece 30 can be limited by the first step 27 through the first abutting surface 22, and the connecting piece 30 is prevented from contacting with the cover plate 11.

Referring to fig. 9 and 10, fig. 9 is a schematic structural diagram of a connector 30 according to an embodiment of the application, and fig. 10 is a schematic sectional structural diagram of a connector 30 according to an embodiment of the application.

In one embodiment, the first end 26 of the pole body 20 extending into the through hole 31 is provided with a protruding portion 25, the protruding portion 25 extends towards the inner peripheral surface of the through hole 31, the inner peripheral surface of the through hole 31 includes a second step 314, the second step 314 is used for forming a second abutting surface 311, the second abutting surface 311 faces away from the cover plate 11, and the second abutting surface 311 is attached to the protruding portion 25 to limit displacement between the pole body 201 and the connecting piece 30 along the length direction of the pole body 201.

In one embodiment, as shown in fig. 6, the pole body 201 protrudes into the through hole 31, and the outer peripheral surface of the pole 20 located in the through hole 31 is provided with a protrusion 25, and the protrusion 25 extends toward the inner peripheral surface of the through hole 31. As shown in fig. 9 and 10, 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 11, the second abutting surface 311 is attached to the protruding portion 25, and displacement between the connecting piece 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 protruding portion 25.

In one embodiment, the protrusion 25 of the pole body 201 may be disposed on the end surface of the 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 portion 26, and the protrusion 25 extends toward the inner peripheral surface of the through hole 31 and is attached to the second abutting surface 311, so that the displacement between the pole body 201 and the connecting piece 30 along the length direction of the pole body 201 can be limited.

In some embodiments, one end of the pole body 201 protrudes into the through bore 31, i.e., the first end 26 protrudes into the through bore 31. When the first end 26 extends into the through hole 31 and reaches the predetermined position, the first end 26 may be folded by riveting or the like to form the protruding portion 25, and the protruding portion 25 formed after folding faces the inner circumferential surface of the through hole 31 and is attached to the second abutting surface 311, so that the displacement between the pole body 201 and the connecting member 30 along the length direction of the pole body 201 can be limited.

In one embodiment, the first end 26 of the pole body 201 extends into the through hole 31, and the end surface 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, so that the first end 26 of the pole body 201 extending into the through hole 31 is deformed by riveting, and a first end 26 with a larger section is formed, and the first end 26 can be attached to the second abutting surface 311 to limit the displacement between the pole body 201 and the connecting piece 30 along the length direction of the pole body 201.

It will be appreciated that the larger the cross-section of the deformed first end portion 26, the greater the contact area between the post 20 and the connector 30 and the better the sealing effect. At the same time, the cross section of the deformed first end portion 26 is identical to the cross section of the through hole 31, and a better sealing effect can be obtained as well.

In one embodiment, the first abutting surface 22 is attached to the connecting piece 30 to form a lower limit of the pole body 201 and the connecting piece 30, and the second abutting surface 311 is attached to the protruding portion 25 to form an upper limit of the pole body 201 and the connecting piece 30, so as to better limit the displacement between the pole body 201 and the connecting piece 30 along the length direction of the pole body 201.

In one embodiment, the sealing cover 40 is partially located in the through hole 31, the inner peripheral surface of the through hole 31 includes a third step 315, the third step 315 is located on one 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 away from the cover plate 11, and the third abutting surface 312 is attached to the sealing cover 40.

In one embodiment, as shown in fig. 9 and 10, the inner peripheral surface of the through hole 31 includes a third step 315, the third step 315 forming a third abutment surface 312, the third abutment surface 312 facing away from the accommodation chamber 13. And the third abutting surface 312 is located on the side of the second abutting surface 311 away from the accommodating cavity 13. As shown in fig. 5, one end of the sealing cover 40 extends into the through hole 31, and the end surface of the sealing cover 40 is attached to the third supporting surface 312, so that the contact area between the sealing cover 40 and the connecting piece 30 can be increased, and the sealing effect between the sealing cover 40 and the connecting piece 30 can be improved.

In one embodiment, as shown in fig. 10, along the direction away from the cover plate 11, the cross section of the through hole 31 on the side of the third abutting surface 312 away from the second abutting surface 311 is gradually increased, so that the through hole 31 has an inclined inner sidewall 313, and the inclined inner sidewall 313 can deform when the sealing cover 40 is attached to the third abutting surface 312, so as to improve the sealing effect of the sealing cover 40 and the connecting piece 30.

In one embodiment, as shown in fig. 6, the cell cover plate 10 includes a sealing nail 90, the sealing nail 90 includes a first section with a larger section and a second section with a smaller section, a gap is left between the second abutting surface 311 and the third abutting surface 312, the gap is used for accommodating the first section of the sealing nail 90, and the second section of the sealing nail 90 stretches into and fills the liquid injection hole 21 to seal the liquid injection hole 21, so that secondary sealing of the liquid injection hole 21 is achieved, and sealing effect of the liquid injection hole 21 is improved.

In one embodiment, the cover 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 a side of the cover 11 away from the connecting piece 30, and a cross-sectional dimension of the limiting portion 23 is larger than a dimension of the mounting hole 113.

In one embodiment, as shown in fig. 4, the pole body 20 is fixed on the cover plate 11, the cover plate 11 is provided with a mounting hole 113, one end of the pole body 201 is located at 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 be connected with the connecting piece 30. As shown in fig. 7, a limit portion 23 is disposed at one end of the pole 20 located in the accommodating cavity 13, and the cross-sectional dimension of the limit portion 23 is larger than the dimension of the mounting hole 113, so that at least a portion of the pole body 201 is located at one side of the cover plate 11 away from the connecting piece 30, thereby limiting 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. Meanwhile, the limiting part 23 can also be matched with the connecting piece 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.

Referring to fig. 11, a schematic structural diagram of a seal ring 50 according to an embodiment of the present application is shown.

In one embodiment, a sealing ring 50 is disposed between the limiting portion 23 and the cover plate 11 along the length direction of the pole body. The seal ring 50 is connected with the limit part 23 and the cover plate 11 in a sealing way, so that electrolyte is prevented from leaking out from a gap between the pole body 201 and the cover plate 11.

In one embodiment, as shown in fig. 5 and 11, a sealing ring 50 is disposed between the limiting portion 23 and the cover plate 11 along the length direction of the pole body 201, the sealing ring 50 is sleeved on the outer side of the pole body 201, and the sealing ring 50 is used for sealing and connecting the pole body 201 and the cover plate 11, so that the electrolyte can be prevented from leaking out from a gap between the pole body 201 and the cover plate 11.

In one embodiment, the gap distance between the limiting portion 23 and the cover plate 11 is smaller than the axial distance of the seal ring 50 along the length direction of the pole body 201, so that the sealing effect between the cover plate 11 and the limiting portion 23 is better.

In one embodiment, as shown in fig. 6, a gap is left between the mounting hole 113 and the pole body 201 in a direction perpendicular to the length direction of the pole body 201, and the seal ring 50 is disposed in the gap between the mounting hole 113 and the pole body 201. The seal ring 50 fills the gap between the inner peripheral surface of the mounting hole 113 and the outer peripheral surface of the post body 201, further ensuring the sealing effect between the stopper 23 and the cover plate 11, and preventing the electrolyte from leaking out of the gap between the post body 201 and the cover plate 11.

In one embodiment, as shown in fig. 6, the cover plate 11 includes an insulating layer 80, the insulating layer 80 is located between the cover plate 11 and the connecting piece 30, the insulating layer 80 is sleeved on the outer side of the pole body 201, and the insulating layer 80 is used for isolating the connecting piece 30 from the cover plate 11 and preventing conduction between the cover plate 11 and the connecting piece 30.

In one embodiment, the insulating layer 80 extends into the gap between the mounting hole 113 and the post body 201 and contacts the seal ring 50, thereby separating the post body 201 from the cover plate 11, and improving the insulating effect of the cover plate 11.

Referring to FIG. 12, a schematic view of a portion of a spacer 70 is shown in an embodiment of the present application.

In one embodiment, as shown in fig. 4 and 12, the cover 11 includes a spacer 70, the spacer 70 is located on one side of the cover 11 away from the connecting piece 30, the spacer 70 is sleeved on the outer side of the pole body 201, and the pole body 201 passes through the through hole 71 of the spacer 70 to separate the limiting portion 23 from the cover 11, thereby improving the insulation effect of the cover 11.

In one embodiment, as shown in fig. 4, the cover plate 11 is provided with a first blast hole 111 and a second blast hole 72, the first blast hole 111 penetrates the cover plate 11 along the thickness direction of the cover plate 11, the second blast hole 72 penetrates the spacer 70 along the thickness direction of the spacer 70, a blast cover 112 is arranged in the first blast hole 111, the blast cover 112 shields the first blast hole 111, a rupture disc 73 is arranged in the second blast hole 72, the rupture disc 73 is used for exhausting the gas in the accommodating cavity 13, and the excessive pressure in the accommodating cavity 13 is prevented, so that the sealing of the cell casing 100 is failed.

Referring to fig. 13, a schematic structure of a lead-out sheet 60 according to an embodiment of the present application is shown.

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 member 30.

In another embodiment, as shown in fig. 4 and 13, the cell cover 10 includes an extraction tab 60, the extraction tab 60 is provided with a through connection hole 61 along the thickness direction, the connection hole 61 is located in the accommodating cavity 13, the terminal body 201 passes through the connection hole 61 and is fixedly connected with the extraction tab 60, and the terminal body 201 is conducted with the cell assembly through the extraction tab 60. The pole body 201 is electrically connected with the battery cell assembly through the lead-out piece 60, and the lead-out piece 60 is partially positioned at the outer side of the accommodating cavity 13, the lead-out piece 60 can be electrically connected with the lead-out pieces 60 of other battery cells, and then the battery cells are connected, so that the power supply of the battery cells for the same electric equipment is realized.

In one embodiment, as shown in fig. 4 and 8, one end of the pole body 201 away from the connecting piece 30 is provided with a fourth step 28, the fourth step 28 is concave to form a fourth abutting surface 24, the fourth abutting surface 24 is attached to the lead tab 60, so that the lead tab 60 is fixed on the pole body 201, and the fourth abutting surface 24 can limit the displacement of the pole body 201 and the lead tab 60 along the length direction of the pole body 201.

Fig. 14-16 are schematic views of a battery cover 10 according to another embodiment of the application, fig. 15 is a schematic view of a connector 30 according to another embodiment of the application, and fig. 16 is a schematic view of an insulating layer 80 according to another embodiment of the application.

In one embodiment, the cover 11 includes an insulating layer 80, where the insulating layer 80 is fixed to a side of the cover 11 facing the connecting member 30, and the insulating layer 80 is provided with a rotation stopping hole 81, and the connecting member 30 is at least partially located in the rotation stopping hole 81, and an outer contour of the connecting member 30 cooperates with an inner peripheral surface of the rotation stopping hole 81 to limit relative rotation between the connecting member 30 and the cover 11.

In one embodiment, as shown in fig. 14 and 15, the cross section of the outer peripheral surface of the connecting member 30 is non-circular, the cross section of the rotation stopping hole 81 of the insulating layer 80 is also non-circular, and the shapes of the two cross sections are the same, and one end of the connecting member 30 is embedded in the rotation stopping hole 81 of the insulating layer 80 to limit the relative rotation between the connecting member 30 and the insulating layer 80.

In one embodiment, the cross section of the inner peripheral surface of the through hole 31 is non-circular, the cross section of the outer peripheral surface of the pole body 201 is non-circular, and the shapes of the two cross sections are the same, and the first end 26 of the pole body 201 extends into the through hole 31 to limit the relative rotation between the connecting piece 30 and the pole body 201.

In another embodiment, one end of the connection member 30 is inserted into the rotation stopping hole 81 of the insulating layer 80, and the first end 26 of the pole body 201 extends into the through hole 31, while limiting the relative rotation between the connection member 30 and the insulating layer 80 and between the connection member 30 and the pole body 201, thereby preventing the rotation of the connection member 30.

Referring to fig. 17, a schematic cross-sectional structure of a portion of a cell cover 10 according to another embodiment of the present application is shown.

In one embodiment, as shown in fig. 17, spacer 70 includes a locating portion 74, and locating portion 74 extends toward cover plate 11 and contacts cover plate 11 to facilitate locating spacer 70 with cover plate 11 via locating portion 74 during assembly of cell cover plate 10.

In another embodiment, a portion of the positioning portion 74 protrudes into the mounting hole 113 of the cover body 11, and the spacer 70 can be positioned with the cover body 11 by the positioning portion 74.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims (14)

1. The pole (20) is characterized by comprising a pole body (201) and a connecting piece (30), wherein the pole body (201) is embedded in a cover plate (11), part of the pole body (201) is positioned at the outer side of the cover plate (11), the pole body (201) is provided with a liquid injection hole (21), and the liquid injection hole (21) penetrates through the pole body (201) along the length direction of the pole body (201);

The connecting piece (30) is located utmost point post body (201) stretches out apron (11) one side, along perpendicular to the length direction of utmost point post body (201), the size of connecting piece (30) is greater than the size of utmost point post body (201), connecting piece (30) include through-hole (31), through-hole (31) with annotate liquid hole (21) intercommunication, through-hole (31) are kept away from apron (11) one end is equipped with sealed lid (40), sealed lid (40) are used for sealing through-hole (31).

2. The pole (20) of claim 1, wherein the pole body (201) is partially located in the through hole (31), an outer circumferential surface of the pole body (201) includes a first step (27), the first step (27) is used for forming a first abutment surface (22), the first abutment surface (22) faces away from the cover plate (11), and the first abutment surface (22) is attached to the connecting piece (30) so as to limit displacement between the pole body (201) and the connecting piece (30) along a length direction of the pole body (201).

3. The pole (20) according to claim 2, wherein the first end (26) of the pole body (201) extending into the through hole (31) is provided with a protrusion (25), the protrusion (25) extends towards the inner circumferential surface of the through hole (31), the inner circumferential surface of the through hole (31) comprises a second step (314), the second step (314) is used for forming a second abutting surface (311), the second abutting surface (311) faces away from the cover plate (11), and the second abutting surface (311) is abutted with the protrusion (25) to limit the displacement between the pole body (201) and the connecting piece (30) along the length direction of the pole body (201).

4. A pole (20) according to claim 3, wherein the sealing cover (40) is partially located in the through hole (31), the inner circumferential surface of the through hole (31) comprises a third step (315), the third step (315) is located at one side of the second step (314) away from the cover plate (11), the third step (315) is used for forming a third abutting surface (312), the third abutting surface (312) faces away from the cover plate (11), and the third abutting surface (312) is attached to the sealing cover (40).

5. The pole (20) according to claim 1, wherein the cover plate (11) comprises an insulating layer (80), the insulating layer (80) is fixed on the side of the cover plate (11) facing the connecting piece (30), the insulating layer (80) is provided with a rotation stopping hole (81), the connecting piece (30) is at least partially positioned in the rotation stopping hole (81), and the outer contour of the connecting piece (30) is matched with the inner peripheral surface of the rotation stopping hole (81) to limit the relative rotation of the connecting piece (30) and the cover plate (11).

6. The pole (20) of any of claims 1-5, wherein 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 in a side of the cover plate (11) away from the connecting piece (30), and a cross-sectional dimension of the limiting portion (23) is larger than a dimension of the mounting hole (113).

7. The pole (20) of claim 6, wherein a seal ring (50) is provided between the limit portion (23) and the cover plate (11) along the length direction of the pole body (201).

8. The pole (20) of claim 7, wherein a gap is left between the mounting hole (113) and the pole body (201) in a direction perpendicular to the length direction of the pole body (201), and the seal ring (50) is disposed in the gap between the mounting hole (113) and the pole (20).

9. Cell cover plate (10), characterized by, including apron (11), sealed lid (40) and claim 1-8 arbitrary post (20), post (20) are inlayed and are located apron (11) and part is located apron (11) outside, annotate liquid hole (21) and through-hole (31) of post (20) intercommunication apron (11) both sides, sealed lid (40) are used for sealed through-hole (31) are kept away from apron (11) one end.

10. A cell housing (100) comprising a casing (12), a cover plate (11) and a sealing cover (40) and a terminal (20) according to any of claims 1-8, said casing (12) comprising a receiving cavity (13) with an opening, said cover plate (11) shielding said opening, a filling hole (21) of said terminal (20) communicating with said receiving cavity (13), or

The battery cell cover plate (10) comprises a shell (12) and the battery cell cover plate (10) as claimed in claim 9, wherein the shell (12) comprises a containing cavity (13) with an opening, the battery cell cover plate (10) shields the opening, and a liquid injection hole (21) of the pole (20) is communicated with the containing cavity (13).

11. A battery cell characterized by comprising a battery cell assembly and a terminal (20) according to any one of claims 1-8, the terminal (20) being adapted to be electrically connected to the battery cell assembly, or

Comprising a cell assembly and a cell cover plate (10) according to claim 9, wherein the terminal (20) of the cell cover plate (10) is used for electrically connecting the cell assembly, or

Comprising a cell assembly and a cell housing (100) according to claim 10, the cell assembly being located in a receiving cavity (13) of the cell housing (100), a pole (20) of the cell housing (100) being for electrically connecting the cell assembly.

12. The cell according to claim 11, wherein the cell cover (10) comprises an outlet piece (60), the outlet piece (60) is provided with a through connection hole (61) along the thickness direction, the connection hole (61) is positioned in the accommodating cavity (13), the pole (20) passes through the connection hole (61) and is fixedly connected with the outlet piece (60), and the pole (20) is communicated with the cell assembly through the outlet piece (60).

13. A battery comprising a battery housing and the cell of claim 11, the cell being located in an interior cavity of the battery housing.

14. An electrical energy device comprising the cell of claim 11 for powering the electrical energy device, or

Comprising the battery of claim 13 for powering the electrical energy device.