CN116706462B

CN116706462B - Battery and battery pack

Info

Publication number: CN116706462B
Application number: CN202310981411.2A
Authority: CN
Inventors: 陈志雄
Original assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Shenzhen Haichen Energy Storage Control Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-10-20
Anticipated expiration: 2043-08-07
Also published as: CN116706462A

Abstract

The application discloses a battery and a battery pack, wherein the upper plastic comprises a body and easy-to-tear lines, the body is provided with a first surface and a second surface which are opposite in the thickness direction, the body is provided with pole holes penetrating through the first surface and the second surface, each easy-to-tear line comprises at least two, the first end point of each easy-to-tear line is positioned on the side wall of the body, the second end point of each easy-to-tear line is positioned at the edge of the pole hole, so that the edge of the pole hole is divided into a plurality of arc sections, the central angle corresponding to the arc sections is smaller than or equal to 180 degrees, and the tearing strength of the easy-to-tear line is smaller than the tearing strength of the body. According to the upper plastic provided by the application, when the body is forcibly torn, the body can be broken from the easily torn line, so that the body is split into at least two halves, the purpose of recovering the upper plastic is realized, the upper plastic is prevented from being crushed when the battery is crushed, and the utilization rate of battery recovery is improved.

Description

Battery and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a battery and a battery pack.

Background

With the rapid development of new energy industry, more and more batteries are scrapped, and the scrapped batteries can not be recycled, so that resource waste and environmental pollution are caused.

In the related art, in the recovery of the battery, the battery is generally crushed by adopting crushing equipment, and then active substances, a shell and a foil in the battery are separated by adopting a chemical method, however, in the recovery mode, plastic parts such as plastic cannot be recovered, so that the recovery rate of the battery is low.

Disclosure of Invention

In order to overcome the defects in the prior art, the application provides the upper plastic, the top cover assembly, the battery and the battery pack, and the upper plastic can be recycled, so that the recycling rate of the battery is improved.

In order to solve the above technical problems, in a first aspect, the present application provides an upper plastic, comprising:

the body is provided with a first surface and a second surface which are opposite in the thickness direction, and a pole hole penetrating through the first surface and the second surface is formed in the body;

the easy tear line, easy tear line includes two at least, every easy tear line's first extreme point is located on the lateral wall of body, the second extreme point is located the edge in utmost point post hole, so as to with the edge in utmost point post hole is cut apart into a plurality of arcs, the central angle that the arc corresponds is less than or equal to 180, easy tear line's tear strength is less than the tear strength of body.

Therefore, in the application, since the easy-to-tear line comprises at least two, the first end point of each easy-to-tear line is positioned on the side wall of the body, the second end point is positioned at the edge of the pole hole, and the tearing strength of the easy-to-tear line is smaller than that of the body, when the battery is recovered, the body can be broken from the easy-to-tear line only by tearing the body with force, so that the body is split into at least two halves, and therefore, the split body can be quickly detached from the battery, so that the purpose of recovering upper plastic is realized, the situation that the upper plastic is crushed when the battery is crushed is avoided, and the utilization rate of battery recovery is improved.

In addition, because the central angle that the arc section corresponds is less than or equal to 180, consequently, when tearing the body, can make the body follow the arc section that corresponds and separate to be convenient for dismantle the body from the utmost point post of battery, and then improved the convenience that goes up the plastic and retrieve.

In a possible implementation manner of the first aspect, the easy-to-tear line is provided with a plurality of holes penetrating through the first surface and the second surface, and the plurality of holes are arranged at intervals along an extending direction of the easy-to-tear line.

From this, through set up a plurality of interval arrangement's hole along the extending direction of easy tear line on easy tear line, can reduce the intensity of easy tear line to be convenient for when tearing the body, make the body break and form a plurality of arc segments corresponding mutually independent several parts from easy tear line.

In addition, through set up a plurality of holes of arranging along the extending direction interval of easy tear line at easy tear line, can make the thickness of connecting portion between two adjacent holes the same with the thickness of body, so, when last plastic is applied to the battery, guaranteed the installation strength between last plastic and the utmost point post to guaranteed the stability of utmost point post installation, and then guaranteed the stability of battery performance. In addition, the process of arranging the holes on the easy-to-tear line is simple, so that the processing difficulty of plastic is reduced.

In a possible implementation manner of the first aspect, a width of the hole near the first end point is greater than a width of the hole far from the first end point, and a width direction of the hole is a direction perpendicular to an extending direction of the easy-tearing line and parallel to the first surface.

Because the width of the hole near the first end point of the easy-tearing line is larger than that of the hole far away from the first end point, the strength of the body near the first end point is smaller than that of the body far away from the first end point, so that the body near the first end point is easy to tear.

In addition, because in the in-process of tearing the body and forming mutually independent several parts, the direction of the termination end of the easy tearing line is pointed to along the first end point of the easy tearing line, the opening of the easy tearing line of tearing gradually increases, so that the opening of the easy tearing line is larger by enabling the width of the hole close to the first end point to be larger than the width of the hole far away from the first end point, and the opening of the easy tearing line can be more easily opened from the beginning of tearing, thereby being more beneficial to tearing the body along the easy tearing line.

In a possible implementation manner of the first aspect, the hole near the post hole penetrates a hole wall of the post hole, and/or the hole near the edge of the body penetrates a side wall corresponding to the edge of the body.

Because the intensity of the pore wall edge of the pole hole is smaller, when the body is torn, the pore wall edge of the pole hole is extremely easy to tear, and based on the fact, in order to ensure the uniformity and the controllability of the tearing of the pore wall edge of the pole hole, the pore wall of the pole hole is penetrated by a pore wall of the pole hole, and therefore the pore wall edge of the pole hole can be broken at an easy-to-tear line, and the tearing effect of the body is ensured.

In addition, as the holes close to the edge of the body penetrate through the side wall corresponding to the edge of the body, the body can be easily torn along the easy-to-tear line, and the convenience of tearing the body is improved.

In a possible implementation manner of the first aspect, a protective film is attached to the first surface, and the protective film covers the hole.

Therefore, the holes on the easy-to-tear line are covered by the protective film, and the holes on the easy-to-tear line can be closed, so that fragments are prevented from entering the holes to influence the assembly of the battery, and meanwhile, the problem of short circuit caused by conductive fragments can be avoided.

In a possible implementation manner of the first aspect, along a thickness direction of the body, the easy-to-tear line includes a through slot penetrating through the body along an extension direction of the easy-to-tear line.

Therefore, the thickness of the easy-to-tear line is smaller than that of the body, and the body is easy to tear from the easy-to-tear line, so that the body is torn into a plurality of parts corresponding to the arc sections.

In addition, through making the thickness of easily tearing the line be less than the thickness of body to realize easily tearing the intensity of line and be less than the intensity of body, thereby avoid dropping to the battery inside through easily tearing the line at the piece.

In a possible implementation manner of the first aspect, the easy-to-tear lines include two, and the second end points of the two easy-to-tear lines divide the edge of the pole hole into arc segments with a central angle of 180 °.

From this, easily tear the line and divide into symmetrical first part and second part with the body, on the one hand, can make the utmost point post hole with easily tear the line symmetry to be convenient for tear first part and second part, on the other hand, when tearing the plastic, can make first part and second part all have better impetus, avoid because of first part or second part are less to lead to tearing the condition emergence that the effect is not good.

In a possible implementation manner of the first aspect, the frangible line divides the body into a first portion and a second portion, and a first auxiliary through hole and a second auxiliary through hole are respectively disposed on the first portion and the second portion.

From this, through setting up first supplementary through-hole and the supplementary through-hole of second, can be when tearing the plastic, the operation of being convenient for is forced to the degree of difficulty of tearing into independent first part and second part with last plastic has been reduced. In addition, through making first supplementary through-hole and the supplementary through-hole of second all with easily tearing the line symmetry and keeping away from and easily tearing the line setting, can be when tearing the plastic, make the impetus on the first part and the impetus on the second part with easily tearing the line symmetry to can apply the tearing force to first part and second part in the extending direction of perpendicular to easily tearing the line, do benefit to and tear the plastic into two halves.

In a possible implementation manner of the first aspect, the pole hole is arranged offset from a geometric center of the body;

the body is also provided with an easy-to-tear opening, the easy-to-tear opening is arranged at intervals between the polar column holes and the extending direction of the easy-to-tear line, and the easy-to-tear line transversely penetrates through the easy-to-tear opening.

Through setting up easy tear mouth, can be when tearing the body along the extending direction of easy tear line for easy tear line fracture, that is to say, shortened easy tear line continuous length to do benefit to and tear the body into first part and second part.

In a possible implementation manner of the first aspect, along an extending direction of the easy-to-tear line, the easy-to-tear line has a first end point, and the first auxiliary through hole, the second auxiliary through hole and the easy-to-tear port are all close to the first end point.

Because the first auxiliary through hole, the second auxiliary through hole and the easy tearing opening are all close to the first end point, the impetus of the first auxiliary through hole and the second auxiliary through hole and the position of the easy tearing opening are all close to the first end point of the easy tearing line, so that the first end point of the body close to the easy tearing line can be easily cracked when the body is torn, and the plastic is more favorable for being detached from the battery.

In a possible implementation manner of the first aspect, the easy-to-tear opening is a cross-shaped through hole or a straight through hole.

When the easy-to-tear mouth is the cross through-hole, the easy-to-tear mouth can be as the sign of plastic on the positive pole, and when the easy-to-tear mouth is the in-line through-hole, the easy-to-tear mouth can be as the sign of plastic on the negative pole, from this, through setting up easy-to-tear mouth, can do benefit to tearing the body into independent first part and second part, need not to set up extra positive pole and negative pole sign again on last plastic.

In a possible implementation manner of the first aspect, the pole hole is disposed at a geometric center of the body, and the body is a rectangular structure, and the rectangular structure has a first diagonal line and a second diagonal line which intersect;

the easy-to-tear line extends along the first diagonal, and the first auxiliary through hole and the second auxiliary through hole are respectively close to two ends of the second diagonal.

Because easily tear the line and extend along first diagonal, first supplementary through-hole and the second are assisted the through-hole and are close to the both ends setting of second diagonal respectively, consequently, when tearing the body, the point of force of first supplementary through-hole and the supplementary through-hole of second is the farthest from the geometric center of body, according to lever principle, this kind of structure is laborsaving most to more be favorable to dismantling the plastic from the battery.

In a possible implementation manner of the first aspect, the first auxiliary through hole and the second auxiliary through hole are cross-shaped through holes or in-line through holes.

When the first auxiliary through hole and the second auxiliary through hole are cross-shaped through holes, the first auxiliary through hole and the second auxiliary through hole can be used for marking that the upper plastic is positive plastic besides being used as an acting point of the upper plastic, and similarly, when the first auxiliary through hole and the second auxiliary through hole are straight-line-shaped through holes, the first auxiliary through hole and the second auxiliary through hole can be used for marking that the upper plastic is negative plastic.

In a possible implementation manner of the first aspect, the second surface is provided with a torsion preventing hole, and the easy-to-tear line passes through the torsion preventing hole.

Therefore, when the body is split along the easy-to-tear line, the strength of the torsion preventing hole is weaker, so that the body can be split more easily.

In a second aspect, the present application also provides a top cap assembly comprising:

a top cover sheet provided with a mounting hole;

the upper plastic of any one of the first aspects, the upper plastic layer being disposed over the top cover sheet;

the pole is sequentially arranged in the mounting hole and the pole hole in a penetrating mode and is clamped with the pole hole.

Since the top cap assembly of the second aspect includes the upper plastic of the first aspect, and the upper plastic of the first aspect can be recovered at the time of battery recovery, it is possible to facilitate the detachment of the upper plastic from the top cap sheet at the time of battery recovery, thereby improving battery recovery.

In a third aspect, the present application also provides a battery comprising:

a housing having an open cavity;

an electrode assembly mounted within the cavity;

the cap assembly of the second aspect, wherein the cap assembly is configured to cover the opening.

Because the top cover assembly in the second aspect is adopted in the battery, the upper plastic can be detached from the top cover sheet before the battery is crushed and recycled, so that the battery recovery rate is improved.

A fourth aspect is a battery pack comprising at least one battery of the third aspect.

Since the battery pack in the fourth aspect includes at least one battery in the third aspect, the recovery rate of the battery pack is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a structure of an upper plastic according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of the plastic in FIG. 1 in a torn state;

FIG. 3 is a schematic view showing the structure of the upper plastic being torn from the top cover sheet according to the embodiment of the present application;

FIG. 4 is an enlarged partial schematic view of FIG. 1 at A;

FIG. 5 is one of the partial enlarged schematic views at B in FIG. 1;

FIG. 6 is a second enlarged partial schematic view at B in FIG. 1;

FIG. 7 is a second schematic view of the plastic tear-off state of FIG. 1;

FIG. 8 is a schematic view of another embodiment of the upper plastic according to the present application;

FIG. 9 is a schematic diagram of the plastic in FIG. 8 in a torn state;

FIG. 9A is a schematic diagram of the back side of the upper plastic according to the embodiment of the present application;

fig. 10 is a schematic structural view of a top cap assembly according to an embodiment of the present application;

FIG. 11 is a schematic view of another embodiment of a top cover assembly;

fig. 12 is a schematic structural diagram of a battery according to an embodiment of the present application;

fig. 13 is a schematic structural view of a battery pack according to an embodiment of the present application.

Reference numerals illustrate:

100-plastic feeding; 110-body; 111-a first part; 1111-a first auxiliary through hole; 112-a second portion; 1121-a second auxiliary through hole; 113-a first surface; 114-a second surface; 110 a-a post hole; 110a 2-anti-torsion holes; 110 b-easy-to-tear; 120-an easy-to-tear line; 121-holes; 130-a protective film;

200-a top cover assembly; 210-a top cover sheet; 221-pole;

300-cell; 310-a housing; 320-electrode assembly;

400-battery pack.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

As described in the background art of the present application, in the related art, in recycling of the battery, a crushing device is generally used to crush the battery, and then a chemical method is used to separate the active material, the shell and the foil from the battery.

In order to solve the technical problems mentioned in the background art, the application provides a battery and a battery pack, wherein the upper plastic comprises a body and an easy-to-tear line, and the tearing strength of the easy-to-tear line is smaller than that of the body, so that when the battery is recovered, the body can be torn along the easy-to-tear line, so that the upper plastic is torn into parts corresponding to arc sections, and therefore, the upper plastic can be detached from the battery, the purpose of recovering the upper plastic is realized, the upper plastic is prevented from being crushed when the battery is recovered, and the utilization rate of battery recovery is improved.

The application is illustrated in detail below by means of specific examples:

referring to fig. 1 and 2, an embodiment of the present application provides an upper plastic 100, where the upper plastic 100 includes a body 110 and a tear line 120, the body 110 has a first surface 113 and a second surface 114 opposite to each other in a thickness direction of the body 110, and a post hole 110a penetrating the first surface 113 and the second surface 114 is provided on the body 110; the easy-to-tear lines 120 include at least two, the first end point of each easy-to-tear line 120 is located on the side wall of the body 110, and the second end point is located at the edge of the pole hole 110a, so as to divide the edge of the pole hole 110a into a plurality of arc segments, the central angle corresponding to the arc segments is smaller than or equal to 180 °, and the tearing strength of the easy-to-tear line 120 is smaller than that of the body 110.

The thickness direction of the body 110 refers to the direction indicated by the Z arrow in fig. 1, and the thickness direction of the body 110 referred to below refers to the direction indicated by the Z arrow. The extending direction of the tear line 120 refers to the direction indicated by the Y arrow in fig. 1, and the extending directions of the tear line 120 mentioned below refer to the directions indicated by the Y arrow. When the upper plastic 100 is assembled with the top cover sheet, the first surface 113 refers to the side surface facing away from the top cover sheet and the second surface 114 refers to the side surface facing toward the top cover sheet.

In addition, the tearing strength of the easy-to-tear line 120 is smaller than that of the body 110, it should be understood that, in the thickness direction of the body 110, the thickness of the easy-to-tear line 120 is smaller than that of the body 110, or, a plurality of thinned portions are provided on the easy-to-tear line 120 to reduce the tearing strength of the easy-to-tear line 120, so that when the body 110 is torn, the body 110 can be broken at the easy-to-tear line 120, thereby splitting the body 110 into two halves, namely, the first portion 111 and the second portion 112. Moreover, the tear strength refers to the ability of the easy-to-tear line 120 or the body 110 to resist plastic deformation and fracture when subjected to the external force, and since the tear strength of the easy-to-tear line 120 is smaller than that of the body 110, the ability of the easy-to-tear line 120 to resist plastic deformation is worse and is easy to fracture when the external force is applied.

Therefore, in this embodiment, since the easy-to-tear line 120 includes at least two easy-to-tear lines 120, the first end point of each easy-to-tear line 120 is located on the side wall of the body 110, and the second end point is located at the edge of the pole hole 110a, the tearing strength of the easy-to-tear line 120 is smaller than that of the body 110, so when the battery is recovered, the body 110 can be broken from the easy-to-tear line 120 only by tearing the body 110 with force, so that the body 110 is split into at least two halves, that is, the mutually independent parts corresponding to the arc segments, so that the independent parts can be quickly detached from the battery to achieve the purpose of recovering the upper plastic 100, thereby avoiding the crushing of the upper plastic 100 when the battery is crushed, and improving the recovery utilization rate of the battery.

In addition, because the central angle corresponding to the arc segment is smaller than or equal to 180 °, when the body 110 is torn, the body 110 can be split into several parts with the central angle smaller than or equal to 180 °, so that the body 110 can be conveniently detached from the pole 221 of the battery, and the convenience of recycling the upper plastic 100 is further improved.

There are various ways to achieve a tear strength of the frangible line 120 that is less than that of the body 110, and in some possible embodiments, referring to fig. 1 and 4 in combination, the frangible line 120 includes a plurality of holes 121 extending through the first surface 113 and the second surface 114, and the plurality of holes 121 are spaced apart along the extending direction of the frangible line 120.

Wherein the plurality refers to three or more. The shape of the hole 121 is not limited, for example, the hole 121 may be rectangular, or circular, and the hole 121 may be a through hole or a blind hole. The formation of the hole 121 is not limited, and the hole 121 is formed by laser drilling, for example.

Thus, by arranging the plurality of holes 121 arranged at intervals along the extending direction of the easy-to-tear line 120 on the easy-to-tear line 120, the tearing strength of the easy-to-tear line 120 can be reduced, so that when the body 110 is torn, the body 110 is broken from the easy-to-tear line 120 and the first portion 111 and the second portion 112 independent of each other are formed.

In addition, through setting up a plurality of holes 121 of arranging along the extending direction interval of easy tear line 120 at easy tear line 120, can make the thickness of the connecting portion between two adjacent holes 121 the same with the thickness of body 110, so, when last plastic 100 is applied to the battery, guaranteed the installation intensity between last plastic 100 and the utmost point post 221 to guaranteed the stability of utmost point post 221 installation, and then guaranteed the stability of battery performance. In addition, the processing difficulty of the upper plastic 100 is reduced due to the simple process of arranging the holes 121 on the easy-to-tear lines 120.

When the body 110 is torn, the tear line 120 is generally pulled from one end of the body 110 to the other end, so as to improve the convenience of tearing the body 110, and in some possible embodiments, the width of the hole 121 near the first end is greater than the width of the hole 121 far from the first end.

The width direction of the hole 121 is a direction perpendicular to the extending direction of the tear line 120 and perpendicular to the thickness direction of the body 110, that is, a direction indicated by an X arrow in fig. 4.

Since the width of the hole 121 near the first end of the tear line 120 is greater than the width of the hole 121 far from the first end, the strength of the body 110 near the first end is smaller than that of the body 110 far from the first end, so that the body 110 near the first end is easily torn.

In addition, since the opening of the torn line 120 is gradually increased along the extending direction of the torn line 120 from the first end point of the torn line 120 in the process of forming mutually independent parts of the torn body 110, the opening of the torn line 120 can be larger from the beginning of the tearing by making the width of the hole 121 close to the first end point larger than the width of the hole 121 far away from the first end point, thereby being more beneficial to tearing the body 110 along the torn line 120.

In some possible embodiments, referring to fig. 4 and 5, the hole 121 near the post hole 110a penetrates the hole wall of the post hole 110a, and/or the hole 121 near the edge of the body 110 penetrates the corresponding sidewall of the edge of the body 110.

It should be noted that, the hole wall of the hole 121 penetrating the pole hole 110a means that the hole 121 communicates with the pole hole 110a.

Because the strength of the hole wall edge of the pole hole 110a is smaller, when the body 110 is torn, the hole wall edge of the pole hole 110a is very easy to tear, based on this, in order to ensure the uniformity and controllability of the hole wall edge tear of the pole hole 110a, the hole 121 close to the pole hole 110a penetrates the hole wall of the pole hole 110a, so that the hole wall edge of the pole hole 110a is broken at the easy-to-tear line 120, thereby ensuring the tearing effect of the body 110.

In addition, since the hole 121 near the edge of the body 110 penetrates the sidewall corresponding to the edge of the body 110, the tearing of the body 110 along the easy-to-tear line 120 can be facilitated, and the convenience of tearing the body 110 is improved.

When the plurality of holes 121 along the extending direction of the easy-to-tear line 120 are disposed on the easy-to-tear line 120 at intervals, if the holes 121 are through holes, some scraps are easy to enter the holes 121 during the process of assembling the battery, on the one hand, the assembling effect of the battery is affected, and on the other hand, if the scraps are conductive, the battery is possibly short-circuited, based on which, in order to avoid the possible problems, in some possible embodiments, referring to fig. 6, the first surface 113 is adhered with the protective film 130, and the protective film 130 covers the holes 121.

Therefore, the holes 121 on the easy-to-tear line 120 can be closed by covering the holes 121 with the protective film 130, so that scraps are prevented from entering the holes 121 to influence the assembly of the battery, and meanwhile, the problem of short circuit caused by the conductive scraps can be avoided.

The protective film 130 may be disposed on a side of the tear line 120 facing away from the top cover 210, or may be disposed on two surfaces of the tear line 120 opposite to each other in the thickness direction of the body 110.

Furthermore, the strength of the frangible line 120 is achieved to be less than that of the body 110, and in other possible embodiments the frangible line 120 includes a through slot extending through the body 110 in the direction of extension of the frangible line 120.

Thus, the thickness of the frangible line 120 is less than the thickness of the body 110 portion, and thus, the body 110 is easily broken away from the frangible line 120 upon tearing, thereby tearing the body 110 in at least two halves.

In addition, the thickness of the easy-to-tear line 120 is smaller than that of the body 110, so that the tearing strength of the easy-to-tear line 120 is smaller than that of the body 110, and the chips are prevented from falling into the battery through the easy-to-tear line 120.

In some possible embodiments, referring to fig. 1 and 7, the easy-tear line 120 includes two, and the second end points of the two easy-tear lines 120 divide the edge of the pole hole 110a into arc segments with a central angle of 180 °.

Through the above arrangement, the body 110 can be separated into the first portion 111 and the second portion 112 along the two easy-to-tear lines 120, and the pole hole 110a is separated into two segments of arc sections respectively located on the first portion 111 and the second portion 112, so long as the connecting line between the intersection points (i.e. the second end points) of the two easy-to-tear lines and the edges of the pole hole 110a passes through the circle center of the pole hole 110a, the two segments of arc sections separated by the pole hole 110a are 180, so that the first portion 111 and the second portion 112 can be separated from the pole, the positions and the shapes of the easy-to-tear lines are not limited, and the extension lines of the easy-to-tear lines do not need to pass through the circle center of the pole hole 110a.

Of course, in some embodiments, the easy-to-tear line 120 divides the body 110 into the first portion 111 and the second portion 112, and the two arc sections separated by the post hole 110a are symmetrical with respect to the easy-to-tear line 120, so as to facilitate tearing the first portion 111 and the second portion 112 apart, and on the other hand, when the plastic 100 is torn, the first portion 111 and the second portion 112 can have better force points, so that the situation of poor tearing effect caused by smaller first portion 111 or second portion 112 is avoided.

The first portion 111 and the second portion 112 may have the same structure or may have different structures, for example, when the first portion 111 and the second portion 112 have the same structure, the first portion 111 and the second portion 112 are symmetrical about the tear line 120.

In addition, the second end points of the two easy-to-tear lines 120 divide the edge of the pole hole 110a into arc segments with a central angle of 180 °, and it should be understood that the easy-to-tear line 120 extends in the radial direction of the pole hole 110a and crosses the pole hole 110a, that is, the extending direction of the easy-to-tear line 120 crosses the center of the pole hole 110a.

In addition, optionally, the number of the easy-to-tear lines 120 is three, and the second end points of the three easy-to-tear lines 120 divide the edge of the pole hole 110a into arc sections with a central angle of 120 °. Thus, when the body 110 is torn along the tear line 120, the body 110 can be split into three parts.

In some possible embodiments, referring to fig. 7, first and second auxiliary through holes 1111 and 1121 are provided on the first and second portions 111 and 112, respectively.

The shape and the size of the aperture of the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are not limited, and a person skilled in the art can correspondingly set the first auxiliary through hole 1111 and the second auxiliary through hole 1121 according to actual needs and the tearing strength of the first portion 111 and the second portion 112, and in addition, when the plastic 100 is torn, the auxiliary rod can be made to extend into the first auxiliary through hole 1111 and the second auxiliary through hole 1121 respectively, so that the plastic 100 is split into the first portion 111 and the second portion 112 by using the lever principle.

Thus, by providing the first and second auxiliary through holes 1111 and 1121, the handling force can be facilitated when the upper plastic 100 is torn, thereby reducing the difficulty of tearing the upper plastic 100 into the independent first and second portions 111 and 112. In addition, by making the first auxiliary through hole 1111 and the second auxiliary through hole 1121 symmetrical with respect to the easy-to-tear line 120 and far away from the easy-to-tear line 120, the point of force on the first portion 111 and the point of force on the second portion 112 can be symmetrical with respect to the easy-to-tear line 120 when the plastic 100 is torn, so that the tearing force can be applied to the first portion 111 and the second portion 112 in the extending direction perpendicular to the easy-to-tear line 120, which is beneficial to tearing the upper plastic 100 into two halves.

In some possible embodiments, referring to fig. 1 and 7, the post hole 110a is disposed offset from the geometric center of the body 110; the body 110 is further provided with a tearable opening 110b, the tearable opening 110b is spaced from the post hole 110a in the extending direction of the tearable line 120, and the tearable line 120 traverses the tearable opening 110b.

Through setting up easy tear mouth 110b, can be when tearing body 110 along easy tear line 120's extending direction for easy tear line 120 fracture, that is to say, shortened easy tear line 120 continuous length to do benefit to tearing body 110 into first portion 111 and second portion 112.

In this embodiment, the shape of the body 110 is not limited, for example, the body 110 is rectangular, the easy-to-tear line 120 extends along the length direction of the body 110, the post hole 110a and the easy-to-tear opening 110b are respectively disposed near two ends of the body 110 in the length direction of the body 110, and the post hole 110a and the easy-to-tear opening 110b are both disposed in the middle of the width direction of the body 110, so that it can be seen that the post hole 110a and the easy-to-tear opening 110b are disposed at intervals along the extending direction of the easy-to-tear line 120, and the easy-to-tear line 120 sequentially traverses the easy-to-tear opening 110b and the post hole 110a.

The shape and size of the easy-to-tear port 110b are not limited, and the easy-to-tear port 110b will be described below as an example of a sign of a positive electrode and a negative electrode.

In some possible embodiments, referring to fig. 1 and 7, the frangible aperture 110b is a cross-shaped through-hole or an in-line through-hole.

When the easy-to-tear opening 110b is a cross-shaped through hole, the easy-to-tear opening 110b can be used as the mark of the plastic 100 on the positive electrode, when the easy-to-tear opening 110b is a straight-line-shaped through hole, the easy-to-tear opening 110b can be used as the mark of the plastic 100 on the negative electrode, and therefore, the body 110 can be easily torn into the independent first part 111 and the independent second part 112 through the easy-to-tear opening 110b, and additional positive electrode and negative electrode marks are not required to be arranged on the upper plastic 100.

In addition, it is noted that, the geometric center of the cross-shaped through hole or the geometric center of the straight-line through hole is on the easy-to-tear line 120, so that the cross-shaped through hole is made to be horizontal or vertical to be consistent with the extending direction of the easy-to-tear line 120, or the length direction of the straight-line through hole is made to be consistent with the extending direction of the easy-to-tear opening 110b, so that the opening with the maximum width, which can be formed on the easy-to-tear line 120, is formed by setting the easy-to-tear opening 110b, so as to ensure the tearing effect of the body 110.

In some possible embodiments, referring to fig. 1 and 7, in the extending direction of the tear line 120, the tear line 120 has a first end point, and the first auxiliary through hole 1111, the second auxiliary through hole 1121, and the tear port 110b are all disposed near the first end point.

Because the first auxiliary through hole 1111, the second auxiliary through hole 1121 and the easy-to-tear opening 110b are all close to the first end point, the positions of the first auxiliary through hole 1111, the second auxiliary through hole 1121 and the easy-to-tear opening 110b are all close to the first end point of the easy-to-tear line 120, so that when the body 110 is torn, the first end point of the body 110 close to the easy-to-tear line 120 is easy to crack, thereby being more beneficial to the disassembly of the upper plastic 100 from the battery.

In some possible embodiments, referring to fig. 8, the post hole 110a is disposed at the geometric center of the body 110, and the body 110 is of a rectangular structure having a first diagonal and a second diagonal intersecting each other; the easy tear line 120 extends along a first diagonal line, and the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are disposed near both ends of the second diagonal line, respectively.

Since the easy-tearing line 120 extends along the first diagonal line, the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are respectively disposed near two ends of the second diagonal line, when the body 110 is torn, the force points of the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are farthest from the geometric center of the body 110, and according to the lever principle, the structure is most labor-saving, thereby being more beneficial to detaching the upper plastic 100 from the battery.

The rectangular structure may be square or rectangular, and when the rectangular structure is square, an included angle between the first diagonal line and the second diagonal line is 45 °.

In some possible embodiments, referring to fig. 8 and 9, the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are both cross-shaped through holes or in-line through holes.

When the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are both cross-shaped through holes, the first auxiliary through hole 1111 and the second auxiliary through hole 1121 can be used to identify that the upper plastic 100 is the positive upper plastic 100 in addition to being used as the force point of the upper plastic 100, and similarly, when the first auxiliary through hole 1111 and the second auxiliary through hole 1121 are both in-line through holes, the first auxiliary through hole 1111 and the second auxiliary through hole 1121 can also be used to identify that the upper plastic 100 is the negative upper plastic 100.

In some possible embodiments, referring to fig. 9A, the second surface 114 is provided with a torsion preventing hole 110a2, and the frangible line 120 passes through the torsion preventing hole 110a2.

Because the edge of the anti-twisting hole 110a2 is weaker, when the easy-tearing line 120 passes through the anti-twisting hole 110a2, the body 110 can be split into several parts independent of each other in the process of tearing the body 110, so that the convenience of recycling the body 110 is improved.

In addition, when the body 110 is applied to the battery, the body 110 and the top cover 210 of the battery are stacked, the second surface 114 is a surface of the body 110 facing the top cover 210, and a side of the top cover 210 facing the body 110 is provided with a torsion preventing post, which is matched with the torsion preventing hole 110a2.

Referring to fig. 10 and 11, the embodiment of the application further provides a top cover assembly 200, where the top cover assembly 200 includes a top cover plate 210, an upper plastic 100 and a pole 221, the top cover plate 210 is provided with a mounting hole, the upper plastic 100 is stacked on the top cover plate 210, and the pole 221 sequentially penetrates through the mounting hole and the pole hole 110a and is clamped with the pole hole 110a.

The upper plastic 100 in the embodiment of the present application may have the same structure as any one of the upper plastic 100 in the above embodiment, and may bring about the same or similar beneficial effects, and specifically, reference may be made to the description in the above embodiment, which is not repeated herein.

Since the top cap assembly 200 of the present embodiment includes the upper plastic 100 of the above embodiment, and the upper plastic 100 of the above embodiment can be recovered at the time of battery recovery, the upper plastic 100 can be easily detached from the top cap sheet 210 at the time of battery recovery, thereby improving battery recovery.

It should be noted that, the top cap assembly 200 may be applied to a prismatic battery or a cylindrical battery.

Referring to fig. 12, the embodiment of the present application also provides a battery 300, the battery 300 including a case 310, an electrode assembly 320, and a top cap assembly 200, wherein the case 310 has an open cavity; the electrode assembly 320 is mounted in the cavity; the cap assembly 200 serves to cover the opening.

The electrode assembly 320 includes a cell formed of a separator, a positive electrode current collector, a negative electrode current collector wound or laminated.

Because the battery 300 employs the cap assembly 200 according to the above embodiment, the upper plastic 100 can be detached from the cap sheet 210 before the battery 300 is crushed and recovered, so as to improve the recovery rate of the battery 300.

The battery 300 may be an energy storage battery such as a lithium battery or a power battery.

Referring to fig. 13, an embodiment of the present application also provides a battery pack 400, the battery pack 400 including at least one battery 300 of the above-described embodiments.

Since the battery pack 400 in the present embodiment includes at least one battery 300 of the above-described embodiments, the recovery rate of the battery pack 400 is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. A battery, comprising:

a housing (310), the housing (310) having an open cavity;

an electrode assembly (320), the electrode assembly (320) being mounted within the cavity;

a cap assembly (200), the cap assembly (200) for covering the opening, the cap assembly (200) comprising:

a top cover sheet (210), wherein a mounting hole is formed in the top cover sheet (210);

the upper plastic (100) is arranged on the top cover sheet (210) in a stacked mode, the upper plastic (100) comprises a body (110) and a tearing line (120), the body (110) is provided with a first surface and a second surface which are opposite in the thickness direction, the body is provided with a pole hole (110 a) penetrating through the first surface and the second surface, the tearing line (120) comprises at least two pieces, a first end point of each tearing line (120) is positioned on the side wall of the body (110), a second end point of each tearing line is positioned on the edge of the pole hole (110 a) so as to divide the edge of the pole hole (110 a) into a plurality of arc sections, and the corresponding central angle of each arc section is smaller than or equal to 180 DEG, and the tearing strength of the tearing line (120) is smaller than that of the body (110).

The pole is sequentially arranged in the mounting hole and the pole hole (110 a) in a penetrating mode and is clamped with the pole hole.

2. The battery according to claim 1, wherein the frangible line (120) includes a plurality of holes (121) penetrating the first surface and the second surface, the plurality of holes (121) being spaced apart along the direction of extension of the frangible line (120).

3. The battery according to claim 2, wherein the width of the hole (121) near the first end point is larger than the width of the hole (121) far from the first end point, the width direction of the hole (121) being a direction perpendicular to the extending direction of the tear line (120) and parallel to the first surface.

4. The battery according to claim 2, characterized in that the hole (121) near the post hole (110 a) penetrates the hole wall of the post hole (110 a) and/or the hole (121) near the edge of the body (110) penetrates the corresponding side wall of the edge of the body (110).

5. The battery according to claim 2, wherein a protective film (130) is attached to the first surface, and the protective film (130) covers the hole (121).

6. The battery according to claim 1, wherein the frangible line (120) comprises a through slot extending through the body (110) in the direction of extension of the frangible line (120).

7. The battery according to claim 1, wherein the frangible line (120) comprises two, the second end points of the two frangible lines (120) dividing the edge of the post hole (110 a) into arc segments having a central angle of 180 °.

8. The battery according to claim 7, wherein the frangible line (120) divides the body (110) into a first portion and a second portion, and the first portion (111) and the second portion (112) are provided with a first auxiliary through hole (1111) and a second auxiliary through hole (1121), respectively.

9. The battery according to claim 8, wherein the post hole (110 a) is provided at a geometric center of the body (110), and the body (110) is of a rectangular structure having a first diagonal and a second diagonal intersecting each other;

the easy-tearing line (120) extends along the first diagonal, and the first auxiliary through hole (1111) and the second auxiliary through hole (1121) are respectively arranged close to two ends of the second diagonal.

10. The battery according to claim 9, wherein the first auxiliary through hole (1111) and the second auxiliary through hole (1121) are both cross-shaped through holes or in-line through holes.

11. The battery according to any one of claims 1-7, wherein the second surface is provided with a torsion preventing hole (110 a 2), and the frangible line (120) passes through the torsion preventing hole (110 a 2).

12. A battery pack comprising the battery (300) of any one of claims 1-11.