CN216958440U - Composite pole, top cover and battery - Google Patents

Abstract

The utility model discloses a composite pole, a top cover and a battery, and relates to the technical field of batteries; the composite pole comprises a first conducting layer, a second conducting layer and a filling piece; the first conducting layer is provided with a first groove; the second conducting layer is attached to the first conducting layer and provided with a second groove, and the circumferential direction of the outer groove wall of the second groove is attached to the circumferential direction of the inner groove wall of the first groove; the filling piece is filled in the second groove and is attached to the inner groove wall of the second groove. On one hand, the composite pole can improve the stability of the first conducting layer and the second conducting layer after being compounded to a certain degree through the arrangement of the first groove and the second groove, and can improve the problems of deformation and looseness under the action of external force to a certain degree; on the other hand, the composite pole can further prevent the first groove and the second groove after the composite pole is combined from being deformed or loosened through the arrangement of the filling piece, so that the stability and the reliability of the composite pole are fully improved, and the safety of the battery can be ensured.

Description

Composite pole, top cover and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a composite pole, a top cover and a battery.

Background

In lithium ion power battery technical field, utmost point post is the inside and outside part of intercommunication battery, and the one end and the inside electric core of battery of utmost point post are connected, and the other end is connected with the circuit of the outside consumer of battery to make the battery can supply power for outside consumer, also can realize charging of self. Simultaneously, because the negative pole post of battery adopts the copper material usually, and the copper material is more expensive, therefore in order to practice thrift the cost, the conducting layer part of being connected with electric core inside with utmost point post keeps original copper material usually, in order to guarantee the performance of battery, and the conducting layer part of being connected with the outside of utmost point post and consumer sets up to the aluminium material that the cost is lower relatively, copper material and aluminium material adopt friction weld or riveted mode cooperation to be connected, in order to form and to guarantee battery performance, the compound utmost point post that the cost is lower relatively again.

In the prior art, after the composite pole is formed, the two conducting layers are easy to loosen or deform under the action of external force, so that the safety performance of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a composite pole which is not easy to loosen and deform and can ensure the safety performance of a battery.

Another object of the present invention is to provide a cap and a battery, which include the above composite post. Therefore, it also has an advantage of high safety performance.

The embodiment of the utility model is realized by the following steps:

in a first aspect, the present invention provides a composite pole, comprising:

a first conductive layer having a first groove;

the second conducting layer is attached to the first conducting layer and provided with a second groove, and the circumferential direction of the outer groove wall of the second groove is attached to the circumferential direction of the inner groove wall of the first groove;

and the filling piece is filled in the second groove and is attached to the inner groove wall of the second groove.

In an alternative embodiment, the inner groove wall of the second groove is provided with a concave part, the filling piece is provided with a convex part, and the convex part is filled in the concave part;

alternatively, the first and second electrodes may be,

the inner groove wall of the second groove is provided with a protruding part, the filling part is provided with a concave part, and the concave part is wrapped outside the protruding part.

In an alternative embodiment, the first groove has a first groove bottom wall and a first groove side wall, the second groove has a second groove bottom wall and a second groove side wall, an outer wall surface of the second groove bottom wall is attached to an inner wall surface of the first groove bottom wall, and an outer wall surface of the second groove side wall is attached to an inner wall surface of the first groove side wall;

the inner wall surface of at least one of the second groove bottom wall and the second groove side wall is provided with a depressed part, and the corresponding position of the filling piece is provided with a raised part.

In an alternative embodiment, the inner wall surface of the bottom wall of the second groove is provided with a first concave part, and the bottom of the filling piece is provided with a first convex part matched with the first concave part; the inner wall surface of the second groove side wall is provided with a second depressed part, and the circumferential direction of the filling piece is provided with a second protruding part matched with the second depressed part.

In an alternative embodiment, the dimension of the first recess at the end near the first slot bottom wall is equal to the dimension of the end far from the first slot bottom wall; or the size of one end of the first concave part close to the bottom wall of the first groove is smaller than that of one end far away from the bottom wall of the first groove; or the size of the first concave part from the end close to the bottom wall of the first groove to the end far away from the bottom wall of the first groove is gradually increased.

In an alternative embodiment, the second recessed portion is an annular groove and the second raised portion is an annular projection.

In an alternative embodiment, the dimension of the second recess on the side close to the first groove side wall is equal to the dimension on the side far from the second groove side wall; or the size of one side of the second concave part close to the side wall of the first groove is smaller than that of one side far away from the side wall of the second groove; or the size of the second sunken part from one side close to the side wall of the first groove to one side far away from the side wall of the second groove is gradually increased.

In an optional embodiment, the first conductive layer has a plurality of first grooves, the second conductive layer correspondingly has a plurality of second grooves, the plurality of second grooves are attached to the plurality of first grooves in a one-to-one correspondence manner, the composite pole column includes a plurality of filling members, and each filling member is filled in the corresponding second groove.

In an alternative embodiment, the size of the first groove is reduced and then increased along the direction from the notch of the first groove to the bottom wall of the first groove; or the size of the first groove is gradually increased along the direction from the notch of the first groove to the bottom wall of the first groove.

In a second aspect, the present invention provides a top cover comprising:

the top cover plate is provided with two mounting holes;

the composite pole comprises a positive pole column and a negative pole column, wherein the positive pole column and the negative pole column are respectively arranged in two mounting holes, and at least one of the positive pole column and the negative pole column is the composite pole in any one of the previous embodiments.

In an optional embodiment, the positive pole column and the negative pole column are both composite pole columns, and the composite pole columns are sleeved with sealing rings; be provided with plastic part between one side of compound utmost point post and the lamina tecti, be provided with down plastic part between opposite side and the lamina tecti, go up plastic part around the circumference of locating the upside of compound utmost point post, and with the sealing washer butt, lower plastic part around the circumference of locating the downside of compound utmost point post, and with the sealing washer butt.

In an optional embodiment, one of the second conductive layer and the upper plastic part is provided with a recessed groove, the other of the second conductive layer and the upper plastic part is provided with an inserting strip, the inserting strip and the recessed groove are inserted, the filling part is arranged on the inserting strip, and the inserting strip is inserted into the recessed groove.

In an optional embodiment, the upper plastic part, the insertion strip and the filling part are integrally formed, the upper plastic part is annular, and the insertion strip and the filling part are located in an annular area;

the concave groove is communicated with the second groove and extends to the end part of the second conducting layer, the upper plastic part is wound on the circumferential edge of the second conducting layer, the inserting strip is inserted into the concave groove, and the filling part is filled in the second groove.

In a third aspect, the present invention provides a battery comprising the composite post of any one of the preceding embodiments, or the top cap of the preceding embodiments.

The embodiment of the utility model has at least the following advantages or beneficial effects:

the embodiment of the utility model provides a composite pole, which comprises a first conducting layer, a second conducting layer and a filling piece, wherein the first conducting layer is arranged on the first conducting layer; the first conducting layer is provided with a first groove; the second conducting layer is attached to the first conducting layer and provided with a second groove, and the circumferential direction of the outer groove wall of the second groove is attached to the circumferential direction of the inner groove wall of the first groove; the filling piece is filled in the second groove and is attached to the inner groove wall of the second groove. On one hand, the composite pole can improve the stability of the first conducting layer and the second conducting layer after being compounded to a certain degree through the arrangement of the first groove and the second groove, and can improve the problems of deformation and looseness under the action of external force to a certain degree; on the other hand, the composite pole can further prevent the first groove and the second groove after the composite pole is combined from being deformed or loosened through the arrangement of the filling piece, so that the stability and the reliability of the composite pole are fully improved, and the safety of the battery can be ensured.

The embodiment of the utility model also provides a top cover and a battery, which comprise the composite pole. Therefore, it also has an advantage of high safety performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a top cover according to an embodiment of the present invention;

FIG. 2 is a schematic partial cross-sectional view of a top cover provided in accordance with an embodiment of the present invention;

FIG. 3 is a partial enlarged view at I of FIG. 2;

FIG. 4 is a first partially exploded view of the top cover according to the embodiment of the present invention;

fig. 5 is a partially exploded view of a top cover according to an embodiment of the present invention.

Icon 100-top cover; 101-a top cover plate; 103-a composite pole; 105-a first conductive layer; 107-a first groove; 109-a second conductive layer; 111-a second groove; 113-a filler member; 115-a first recess; 117-second recess; 119-a first boss; 121-a second boss; 123-a first tank bottom wall; 125-first slot side wall; 127-a second trough bottom wall; 129-second trench sidewalls; 131-mounting holes; 133-sealing ring; 135-mounting a plastic part; 137-placing a plastic part; 139-convex hull; 141-a concave groove; 143-splicing strips.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the related art, after the composite pole of the battery is formed, the two conducting layers are easy to loosen or deform under the action of external force, so that the safety performance of the battery is influenced. In view of this, the present embodiment provides a battery, in which the composite post can effectively prevent the two conductive layers from loosening or deforming through the arrangement of the filling member, so as to ensure the safety performance of the battery. The structure of the battery will be described in detail below.

Fig. 1 is a schematic structural diagram of a top cover 100 provided in this embodiment. The present embodiment provides a battery including a case (not shown), a top cover 100 shown in fig. 1, and a battery cell (not shown).

The casing is for having open cuboid structure, and the electric core sets up in the casing, and top cap 100 lid is located the uncovered department of casing, and with casing welded fit. Meanwhile, the top cover 100 comprises a top cover plate 101, two mounting holes 131 are formed in the top cover plate 101, a positive pole column and a negative pole column are arranged at the two mounting holes 131 respectively, and the positive pole column and the negative pole column are electrically connected with a positive pole lug and a negative pole lug of the battery cell respectively, so that the battery cell can be ensured to perform normal charging and discharging operations.

In this embodiment, the positive electrode post and the negative electrode post are both the composite electrode post 103, and both have the same structure. In other embodiments, one of the positive and negative posts may be configured as a composite post 103, and the other may be configured as a general non-composite post structure, which is not limited in this embodiment.

Fig. 2 is a schematic partial cross-sectional view of the top cover 100 provided in this embodiment; FIG. 3 is a partial enlarged view at I of FIG. 2; fig. 4 is a partially exploded view of the top cover 100 according to this embodiment. Referring to fig. 2 to 4, in the present embodiment, the composite post 103 specifically includes a first conductive layer 105, a second conductive layer 109, and a filling member 113. The first conductive layer 105 of the negative electrode tab is a copper conductive layer, and the second conductive layer 109 is an aluminum conductive layer.

In detail, the first conductive layer 105 is a plate-shaped structure, and the first conductive layer 105 has a first groove 107, and the first groove 107 is a punched groove. The second conductive layer 109 is also substantially a plate-shaped structure, and the second conductive layer 109 is used for being attached to the first conductive layer 105. Moreover, the first conductive layer 105 has a convex hull 139 formed by stamping, and the convex hull 139 can be riveted with the second conductive layer 109, and then stamped at the riveted position by stamping, so as to form the first groove 107 on the convex hull 139, and simultaneously form the second groove 111 on the second conductive layer 109, and make the circumferential direction of the outer groove wall of the second groove 111 fit with the circumferential direction of the inner groove wall of the first groove 107. The stability of the composite pole 103 after the first conductive layer 105 and the second conductive layer 109 are compounded can be improved to a certain degree through the arrangement of the first groove 107 and the second groove 111, and the problems of deformation and looseness under the action of external force can be improved to a certain degree.

Meanwhile, the filling member 113 is filled in the second groove 111, and is adapted to the shape of the second groove 111 so as to be attached to the inner wall of the second groove 111. The composite pole 103 can further prevent the first groove 107 and the second groove 111 after being compounded from deforming or loosening under the action of external force through the arrangement of the filling part 113, so that the stability and the reliability of the composite pole 103 are fully improved, and the safety of the battery is ensured.

It should be noted that, in the present embodiment, the filling manner of the filling member 113 may be general assembly molding or injection molding, and the material of the filling member 113 is metal or plastic, so that the cost is low. Meanwhile, the outer surface of the filling member 113 can be further provided with an identifier according to the requirement, for example, a "+" or "+" identifier can be set, so that the user can well distinguish the positive pole from the negative pole, and the safety and reliability of the battery charging and discharging operation are ensured.

As an alternative, referring to fig. 2 to 4 again, the inner wall of the second groove 111 is provided with a recess, and the filling member 113 has a protrusion, and the protrusion is filled in the recess. The concave part is arranged in the second groove 111, so that the stability of the matching of the filling part 113 and the second groove 111 is effectively improved, the stability of the matching of the first groove 107 and the second groove 111 is improved, the deformation or looseness of the compounded first groove 107 and second groove 111 can be further prevented, and the stability and reliability of the compound pole 103 are fully improved. Of course, in other embodiments, a convex portion may be disposed on an inner groove wall of the second recess, and a concave portion is formed at a corresponding position of the filling member 113, so that the concave portion is wrapped on an outer side of the convex portion.

Specifically, in the present embodiment, each of the first groove 107 and the second groove 111 has a substantially U-shaped groove structure, and the first groove 107 has a first groove bottom wall 123 and a first groove side wall 125, the first groove bottom wall 123 is opposite to the notch of the first groove 107, and the first groove side wall 125 is located between the notch of the first groove 107 and the first groove bottom wall 123. Meanwhile, the second groove 111 has a second groove bottom wall 127 and a second groove side wall 129, the second groove bottom wall 127 being opposed to the notch of the second groove 111, the second groove side wall 129 being located between the notch of the second groove 111 and the second groove bottom wall 127. Moreover, the outer wall surface of the second groove bottom wall 127 is tightly attached to the inner wall surface of the first groove bottom wall 123 in the riveting process, and the outer wall surface of the second groove side wall 129 is tightly attached to the inner wall surface of the first groove side wall 125 in the riveting process, so that the attaching tightness and stability of the first groove 107 and the second groove 111 are fully ensured, and the stability of the two conductive layers after being compounded is improved.

In addition, in the present embodiment, a recessed portion is provided on an inner wall surface of at least one of the second groove bottom wall 127 and the second groove side wall 129. For example, the inner wall surface of the second groove bottom wall 127 is provided with a first recessed portion 115, and the bottom of the filler 113 is correspondingly provided with a first protruding portion 119 matching the first recessed portion 115. The internal wall face of second groove lateral wall 129 is provided with second depressed part 117, the circumference correspondence of filler 113 is provided with the second bellying 121 that matches with second depressed part 117, through all set up the depressed part at second groove diapire 127 and second groove lateral wall 129, can guarantee that the cooperation stability of filler 113 packing trailing flank and bottom surface all obtains promoting effectively, thereby can fully improve the stability of compound utmost point post 103, reduce to warp or not hard up the condition appearance, guarantee the security and the reliability of charge-discharge operation.

More specifically, referring to fig. 3 again, in the present embodiment, the first recess 115 is a groove with a trapezoidal cross section. That is, the first recess 115 gradually increases in size from an end close to the first tank bottom wall 123 to an end distant from the first tank bottom wall 123. Through setting up like this for stability after first depressed part 115 and the cooperation of first bellying 119 is higher, and first bellying 119 is more difficult for deviating from in first depressed part 115, and makes first groove diapire 123 and the stability of the cooperation of second groove diapire 127 also higher, thereby can fully guarantee the stability and the reliability of compound utmost point post 103. Of course, in other embodiments, the first recess 115 may be a rectangular groove, that is, the first recess 115 may have an end near the bottom wall 123 of the groove with a size equal to an end far from the bottom wall 123 of the groove. Alternatively, the first recess 115 may be disposed in an irregular groove-like structure, for example, only the dimension of the end close to the first groove bottom wall 123 may be smaller than the dimension of the end far from the first groove bottom wall 123, so as to ensure the stability of the composite pole 103, which is not described in detail in this embodiment.

Similarly, referring to fig. 3 again, in the present embodiment, the second recess 117 is an annular groove, and the second protrusion 121 is an annular protrusion. The second concave part 117 and the second convex part 121 are arranged in a ring shape, so that the two can be effectively and stably arranged in the circumferential direction, the contact area of the two is large, and the stability and the reliability of the composite pole 103 can be further improved. Also, in the present embodiment, the second recess 117 is an annular groove having a rectangular cross section, that is, the size of the second recess 117 on the side close to the first groove side wall 125 is equal to the size of the second recess on the side away from the second groove side wall 129. In other embodiments, the second recess 117 may be a groove with a trapezoidal cross section, such that the size of the second recess 117 gradually increases from the side close to the first groove sidewall 125 to the side far from the second groove sidewall 129. Alternatively, the dimension of the side of the second recess 117 close to the first slot sidewall 125 is set smaller than the dimension of the side far from the second slot sidewall 129, to further improve the stability and reliability of the composite post 103.

Referring to fig. 1 and fig. 4 again, in the present embodiment, whether the positive post or the negative post is a positive post, a plurality of first grooves 107, for example, two first grooves 107, may be disposed on the first conductive layer 105, and correspondingly, two second grooves 111 may be disposed on the second conductive layer 109, so that when the first conductive layer 105 and the second conductive layer 109 are combined, the two second grooves 111 can be attached to the two first grooves 107 in a one-to-one correspondence manner. And, the composite pole 103 includes two filling members 113, and each filling member 113 is filled in the corresponding second groove 111. Through the arrangement of the plurality of first grooves 107, the plurality of second grooves 111 and the plurality of filling members 113, the stability and reliability of the composite pole 103 can be further improved, and thus the safety performance of the battery can be further improved. Of course, in other embodiments, the number of the first groove 107, the second groove 111, and the filling member 113 may also be adjusted according to requirements, and the embodiment is not limited.

As an alternative, referring to fig. 3 again, in the present embodiment, along the direction from the opening of the first groove 107 to the first groove bottom wall 123, the size of the first groove 107 is first decreased and then increased, and the second groove 111 is adapted to the shape of the first groove 107. Through setting up like this for second recess 111 is difficult for deviating from first recess 107, can improve the stability and reliability of compound utmost point post 103 still further, reduces the appearance of deformation or not hard up problem, guarantees the security of battery. Of course, in other embodiments, the size of the first groove 107 may also be set to gradually increase along the direction from the notch of the first groove 107 to the first groove bottom wall 123, so that the second groove 111 is less likely to be separated, and the embodiment is not limited.

Referring to fig. 1 to 4 again, in the present embodiment, the top cap 100 further includes a sealing ring 133, an upper plastic member 135 and a lower plastic member 137. The sealing ring 133 is sleeved outside the composite pole 103, the upper plastic part 135 is in an annular structure, and the upper plastic part 135 is arranged around the upper side of the composite pole 103, between the composite pole 103 and the top cover plate 101, and is abutted against the sealing ring 133. The lower plastic part 137 is of a plate-shaped structure, and a circumferential annular structure wound around the lower side of the composite pole 103 is convexly arranged on the lower plastic part 137, and the annular structure is also abutted to the sealing ring 133. Through the cooperation of sealing washer 133, last plastic part 135 and plastic part 137 down, can guarantee security, stability, sealing washer 133 and the reliability of positive post and negative pole post and electric core cooperation in-process to can fully improve the security and the reliability of battery, guarantee the safety of charge-discharge operation and go on.

Fig. 5 is a partially exploded view of the top cover according to the present embodiment. Referring to fig. 5, in the present embodiment, the filling member 113 may be a structure independent from the upper plastic member 135 shown in fig. 4, or may be directly compounded on the upper plastic member 135 to form a composite structure together with the upper plastic member 135. Also, in the present embodiment, a recessed groove 141 communicating with the second groove 111 may be provided on the second conductive layer 109 of the composite post 103. Meanwhile, the insertion strip 143 capable of being inserted into and matched with the recessed groove 141 is arranged on the upper plastic part 135, and the filling part 113 is arranged on the insertion strip 143, so that when the insertion strip 143 is inserted into and matched with the recessed groove 141, the filling part 113 can be correspondingly filled into the second groove 111, stability and reliability of the composite pole 103 and the whole top cover 100 are fully guaranteed, and quality and efficiency of charging and discharging operations are guaranteed.

In detail, in the present embodiment, the upper plastic part 135, the insertion strip 143, and the filling part 113 are integrally formed, the upper plastic part 135 is in an annular structure, the insertion strip 143 is in a strip structure, and the insertion strip 143 and the filling part 113 are located in an annular region. And one end of the insertion strip 143 is connected to one inner wall of the upper plastic part 135, and the other end is connected to the other inner wall of the upper plastic part 135. The filling member 113 is disposed approximately in the middle of the plug strip 143 in the length direction, so that the plug strip 143 has two plug sections located on both sides of the filling member 113. And since the number of the filling members 113 is two, the number of the insertion strips 143 is also correspondingly set to two.

Corresponding to it, the quantity of depressed trench 141 also corresponds and sets up to two, and every depressed trench 141 all includes two groove segments that are located second recess 111 both sides, and every equal one end in groove segment communicates with second recess 111, and the other end extends to the tip of second conducting layer 109, so that when two grafting sections that are located filler 113 both sides are pegged graft with two groove segments one-to-one, filler 113 also can fill in corresponding ground second recess 111, with the stability and the reliability of fully guaranteeing whole top cap 100.

Of course, in other embodiments, the filling member 113 may also be disposed at other positions of the upper plastic part 135, for example, at the periphery of the upper plastic part 135, and the forming modes of the filling member 113, the insertion strip 143 and the upper plastic part 135 may also be adjusted according to requirements, so as to ensure that the filling member 113 can be filled in the second groove 111 when the insertion strip 143 is inserted into the concave groove 141; meanwhile, in other embodiments, the insertion strip 143 may also be disposed on the second conductive layer 109, and the concave groove 141 is correspondingly disposed on the upper plastic part 135, which is not limited in this embodiment.

The following describes the installation process, operation principle and beneficial effects of the battery provided by the embodiment of the utility model in detail by taking the structure shown in fig. 4 as an example:

when the battery is installed, the battery core can be accommodated in the casing, the molded top cover 100 is covered on the opening of the casing, the positive pole column and the negative pole column of the top cover 100 are respectively connected with the positive pole and the negative pole of the battery core, and finally the circumferential direction of the top cover 100 is in welding fit with the circumferential direction of the casing. When the top cover 100 is formed, the sealing ring 133 may be sleeved outside the formed composite post 103, and then the composite post 103 is disposed in the mounting hole 131, and the upper plastic part 135 and the lower plastic part 137 may be disposed. In the process of forming the composite post 103, the convex hull 139 may be stamped on the first conductive layer 105, then the convex hull 139 is riveted with the second conductive layer 109, then the riveting position is stamped in a stamping manner, so as to form the first groove 107 on the convex hull 139, form the second groove 111 on the second conductive layer 109 at the same time, and make the first groove 107 of the first conductive layer 105 fit with the second groove 111 of the second guide layer, and then fill the filling member 113 in the second groove 111. After the battery is installed, the charging and discharging operation can be carried out.

In the above process, on one hand, the composite pole 103 can improve the stability of the first conductive layer 105 and the second conductive layer 109 after being composited to a certain extent through the arrangement of the first groove 107 and the second groove 111, and can improve the problems of deformation and looseness under the action of external force to a certain extent; on the other hand, the composite pole 103 can further prevent the first groove 107 and the second groove 111 from being deformed or loosened after being combined by the filler 113, so that the stability and reliability of the composite pole 103 can be sufficiently improved, and the safety of the battery can be ensured.

In summary, the embodiment of the utility model provides the composite pole post 103, the top cover 100 and the battery with high stability and safety performance.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A composite pole, comprising:

a first conductive layer having a first groove;

the second conducting layer is attached to the first conducting layer and provided with a second groove, and the circumferential direction of the outer groove wall of the second groove is attached to the circumferential direction of the inner groove wall of the first groove;

and the filling piece is filled in the second groove and is attached to the inner groove wall of the second groove.

2. The composite pole according to claim 1, characterized in that:

a concave part is arranged on the inner groove wall of the second groove, the filling piece is provided with a convex part, and the convex part is filled in the concave part;

alternatively, the first and second electrodes may be,

the inner groove wall of the second groove is provided with a protruding part, the filling part is provided with a concave part, and the concave part wraps the outer side of the protruding part.

3. The composite post according to claim 2, characterized in that:

the first groove is provided with a first groove bottom wall and a first groove side wall, the second groove is provided with a second groove bottom wall and a second groove side wall, the outer wall surface of the second groove bottom wall is attached to the inner wall surface of the first groove bottom wall, and the outer wall surface of the second groove side wall is attached to the inner wall surface of the first groove side wall;

the inner wall surface of at least one of the second groove bottom wall and the second groove side wall is provided with the depressed part, and the corresponding position of the filling piece is provided with the bulge part.

4. The composite post according to claim 3, characterized in that:

a first concave part is arranged on the inner wall surface of the bottom wall of the second groove, and a first convex part matched with the first concave part is arranged at the bottom of the filling piece; and a second depressed part is arranged on the inner wall surface of the second groove side wall, and a second protruding part matched with the second depressed part is arranged on the circumferential direction of the filling piece.

5. The composite post according to claim 4, characterized in that:

the size of one end of the first concave part close to the bottom wall of the first groove is equal to that of one end far away from the bottom wall of the first groove; or the size of one end of the first concave part close to the bottom wall of the first groove is smaller than that of one end far away from the bottom wall of the first groove; or the size of the first concave part from the end close to the first groove bottom wall to the end far away from the first groove bottom wall is gradually increased.

6. The composite post according to claim 4, characterized in that:

the second concave part is an annular groove, and the second convex part is an annular bulge.

7. The composite post according to claim 4, characterized in that:

the size of one side of the second concave part close to the side wall of the first groove is equal to the size of one side far away from the side wall of the second groove; or the size of one side of the second concave part close to the side wall of the first groove is smaller than that of one side far away from the side wall of the second groove; or the size of the second concave part from one side close to the side wall of the first groove to one side far away from the side wall of the second groove is gradually increased.

8. The composite post according to any one of claims 1 to 7, characterized in that:

the first conducting layer is provided with a plurality of first grooves, the second conducting layer is correspondingly provided with a plurality of second grooves, the second grooves are attached to the first grooves in a one-to-one correspondence mode, the composite pole comprises a plurality of filling pieces, and each filling piece is filled in the corresponding second groove.

9. The composite post according to any one of claims 1 to 7, characterized in that:

along the direction from the notch of the first groove to the bottom wall of the first groove, the size of the first groove is firstly reduced and then increased; or the size of the first groove is gradually increased along the direction from the notch of the first groove to the bottom wall of the first groove.

10. A header, comprising:

the top cover plate is provided with two mounting holes;

the positive pole post and the negative pole post are respectively arranged in the two mounting holes, and at least one of the positive pole post and the negative pole post is the composite pole post in any one of claims 1 to 9.

11. The overcap of claim 10, wherein:

the positive pole column and the negative pole column are both the composite pole column, and a sealing ring is sleeved outside the composite pole column; one side of compound utmost point post with be provided with plastic part between the lamina tecti, be provided with down plastic part between opposite side and the lamina tecti, go up plastic part around locating the circumference of the upside of compound utmost point post, and with the sealing washer butt, down plastic part around locating the circumference of the downside of compound utmost point post, and with the sealing washer butt.

12. The overcap of claim 11, wherein:

the second conducting layer with go up plastic part both one of them and seted up the depressed slot, the other one of the two is provided with the grafting strip, the grafting strip with the depressed slot is pegged graft, the filler piece set up in the grafting strip, the grafting strip with the depressed slot is pegged graft.

13. The overcap of claim 12, wherein:

the upper plastic part, the inserting strip and the filling part are integrally formed, the upper plastic part is annular, and the inserting strip and the filling part are located in an annular area;

the sunken groove with the second recess intercommunication just extends to the tip of second conducting layer, go up the plastic part around locating the circumference edge of second conducting layer, the grafting strip with the sunken groove is pegged graft, the filler fill in the second recess.

14. A battery comprising the composite post of any one of claims 1 to 9 or the cap of any one of claims 10 to 13.

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