CN217933996U

CN217933996U - Battery with a battery cell

Info

Publication number: CN217933996U
Application number: CN202221763369.4U
Authority: CN
Inventors: 徐卫东; 张男
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-11-29
Anticipated expiration: 2032-07-08
Also published as: WO2024007557A1

Abstract

The utility model discloses a battery, this battery include casing, electric core, lamina tecti and insulating lid, and wherein, the casing is including having the open-ended chamber that holds, and electric core is located and is held the intracavity, and the lamina tecti lid fits the opening and holds the chamber with sealed. Insulating lid is located and holds the intracavity, and insulating lid includes apron portion and peripheral portion, and the apron portion laminating is in the lamina tecti, and the periphery of apron portion is located in the periphery of peripheral portion, and peripheral portion is located between the internal face of electric core and holding the chamber to the internal face of separation electric core and holding the chamber. The utility model discloses a battery can improve the assembly precision of electric core and casing to reduce the possibility that electric core takes place to warp.

Description

Battery with a battery cell

Technical Field

The utility model relates to a battery technology field especially relates to a battery.

Background

After the battery core of the battery is installed in the shell, because a gap needs to be left between the battery core and the inner wall surface of the shell, the assembly precision between the battery core and the shell is not well controlled. When the battery works or moves, the battery core is easy to incline and decenter due to the gap, so that the battery core may contact with the inner wall surface of the shell, and deformation occurs. Especially in electric core working process, the inflation of electric core can make electric core and casing wall surface contact's position warp more seriously, probably can make the electric conductive property variation of electric core, influences life.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses battery can improve the assembly precision of electric core and casing to reduce the possibility that electric core takes place to warp.

In order to achieve the above object, the utility model discloses a battery, include:

a housing including a receiving cavity having an opening;

the battery cell is arranged in the accommodating cavity;

the top cover plate covers the opening to seal the accommodating cavity; and

the insulating cover is located the holding cavity, the insulating cover comprises a cover plate portion and an outer peripheral portion, the cover plate portion is attached to the top cover plate, the outer peripheral portion is arranged in the periphery of the cover plate portion in a surrounding mode, the outer peripheral portion is located between the electric core and the inner wall face of the holding cavity, and therefore the electric core and the inner wall face of the holding cavity are separated.

As an optional implementation manner, in an embodiment of the present invention, the electrical core includes a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate, an active material coating layer is disposed on the positive plate or the negative plate, the active material coating layer includes a main body portion and a thinning portion, the thinning portion is disposed on a side of the main body portion facing the top cover plate, and a thickness of the thinning portion is smaller than a thickness of the main body portion,

the peripheral portion has a first end facing away from the cover plate portion, and a projection of the first end on the active material coating layer is located on the thinning portion in a direction perpendicular to a height direction of the battery cell.

As an optional implementation manner, in an embodiment of the present invention, a side surface of the thinning portion away from the positive plate or the negative plate is an inclined surface, so that the thickness of the thinning portion gradually thins along a direction from the main body portion toward the top cover plate.

As an optional implementation manner, in an embodiment of the present invention, the battery cell includes a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate, an active material coating layer is disposed on the positive plate or the negative plate, and an end of the active material coating layer facing the top cover plate is a second end;

the peripheral portion has a first end that deviates from the cover plate portion, and a space is provided between the first end and the second end along the height direction of the battery cell.

As an optional implementation manner, in an embodiment of the present invention, the positive plate, the negative plate, and the separator are all multiple plates, multiple positive plates and multiple negative plates are alternately arranged, and one separator is disposed between adjacent positive plates and adjacent negative plates;

the diaphragm positioned on the outermost layer is a first diaphragm in the direction of the inner wall surface of the accommodating cavity, the first diaphragm protrudes relative to the second end in the height direction of the battery cell, and a distance is reserved between one end, facing the top cover plate, of the first diaphragm and the first end of the peripheral part.

As an optional implementation manner, in an embodiment of the present invention, the battery further includes an insulating film, the insulating film is coated on an outer periphery of one end of the positive plate, the negative plate, and the diaphragm, which faces the top cover plate, in a direction along an inner wall surface of the electrical core pointing to the accommodating cavity, and the insulating film is located between the diaphragm and the peripheral portion to block the diaphragm and the peripheral portion.

in the direction of the inner wall surface of the accommodating cavity, which is pointed by the battery cell, the diaphragm positioned at the outermost layer is a first diaphragm, and the insulating film is positioned between the first diaphragm and the peripheral part;

and one end of the insulating film, facing the top cover plate, protrudes out of one end of the positive plate or one end of the negative plate, facing the top cover plate, in the height direction of the battery core.

As an optional implementation manner, in an embodiment of the present invention, the peripheral portion surrounds a periphery of the tab of the battery cell to limit a position of the battery cell in the accommodating cavity.

As an optional implementation manner, in the embodiment of the utility model, the battery still includes the current collector piece, the current collector piece set up in deviating from of apron portion one side of lamina tecti, the current collector piece be coupled in electric core, the peripheral portion is equipped with the breach, the breach is used for right the current collector piece stretches into in order to set up provide during the apron portion and dodge.

As an optional implementation manner, in an embodiment of the present invention, a limiting structure is disposed on a side of the cover plate portion away from the top cover plate, the limiting structure includes a limiting post, a limiting folded rib and a limiting straight rib, the limiting post and the limiting folded rib are respectively located on two sides of the limiting straight rib, and the limiting post, the limiting folded rib and the limiting straight rib jointly define a mounting groove for arranging the current collecting piece;

the current collector corresponds spacing muscle of rolling over is equipped with prevents slow-witted chamfer, current collector install in during the mounting groove, prevent slow-witted chamfer connect in spacing muscle of rolling over.

As an optional implementation manner, in the embodiment of the present invention, along the height direction of the electrical core, the peripheral portion deviates from the one end of the cover plate portion protrudes from the deviation of the limiting column, the limiting folded rib and the limiting straight rib.

As an optional implementation manner, in an embodiment of the present invention, the top cover plate is provided with a first mounting hole, the cover plate portion is provided with a second mounting hole corresponding to the first mounting hole, the battery further includes a pole, the pole is disposed through the first mounting hole and the second mounting hole, and the pole is coupled to the current collector;

the apron deviate from one side of lamina tecti still is equipped with the strengthening rib, the strengthening rib with the second mounting hole is radial distribution as the center, follows the direction of height of electric core, the peripheral portion deviate from the one end protrusion of lamina tecti in the strengthening rib deviate from the one end of lamina tecti.

As an optional implementation manner, in the embodiment of the present invention, the cover plate portion is attached to the top cover plate, and a first positioning portion is disposed on one side of the top cover plate, the top cover plate corresponds to the first positioning portion and is provided with a second positioning portion, the cover plate portion is attached to the top cover plate, and the second positioning portion is connected to the first positioning portion in a matching manner.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides a battery sets up between the internal face of electricity core and casing through the peripheral portion with insulating cover to play certain effect of supporting electric core, and improve the axiality of electricity core and casing assembly. Meanwhile, the peripheral part can reduce the clearance between the battery cell and the inner wall surface of the shell, the inclination degree of the battery cell can be reduced, and further the possibility of deformation of the battery cell can be reduced, so that the working stability of the battery is improved, and the service life of the battery is prolonged.

In addition, the peripheral part is arranged between the battery cell and the inner wall surface, and the insulation between the battery cell and the inner wall surface can be realized, so that the phenomenon that the normal work of the battery is influenced due to the fact that the battery cell is directly contacted with the inner wall surface is prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a battery provided in this embodiment;

fig. 2 is an exploded schematic view of the battery provided in this embodiment;

FIG. 3 isbase:Sub>A sectional view taken along line A-A in FIG. 1;

fig. 4 is an enlarged view of a B portion (an active material coating layer is provided with a thinning portion) in fig. 3;

fig. 5 is an enlarged view of another B portion (an active material coating layer is not provided with a thinning portion) in fig. 3;

fig. 6 is a schematic view illustrating an installation state of the current collecting plate and the insulating cover according to the present embodiment;

fig. 7 is an exploded schematic structural diagram of a top cover plate, a terminal post, and an insulating cover according to a first view angle provided in this embodiment;

fig. 8 is an exploded schematic structural diagram of a top cover plate, a terminal post, and an insulating cover according to a second viewing angle provided in this embodiment;

fig. 9 is a cross-sectional view of the top cover plate, the pole post and the insulating cover provided in this embodiment along the direction C-C in fig. 8.

Description of the main reference numerals

100. A battery; 1. a housing; 11. an opening; 12. an accommodating chamber; 121. an inner wall surface; 2. an electric core; 21. A positive plate; 22. a negative plate; 23. a diaphragm; 231. a first diaphragm; 23a, a third end; 24. an active material coating layer; 24a, a main body portion; 24b, a thinned portion; 241. a second end; 3. a top cover plate; 31. A first mounting hole; 32. a second positioning portion; 4. an insulating cover; 41. a cover plate portion; 411. a limiting structure; 41a, a limiting column; 41b, limiting folded ribs; 41c limiting straight ribs; 412. mounting grooves; 413. a second mounting hole; 414. reinforcing ribs; 415. a first positioning portion; 42. a peripheral portion; 421. a first end; 422. a notch; 5. an insulating film; 51. a fourth end; 6. a current collector; 61. preventing a dead angle; 7. a pole column; 71. a main body portion; 72. a first flange; 73. a second flange; 8. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can 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 invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1 to fig. 3, the present embodiment provides a battery 100, where the battery 100 includes a casing 1, a battery cell 2, a top cover plate 3, and an insulating cover 4, where the casing 1 includes an accommodating cavity 12 having an opening 11 for accommodating the battery cell 2, and the top cover plate 3 covers the opening 11 of the casing 1, so as to seal the accommodating cavity 12. Insulating cover 4 also is located and holds chamber 12, and insulating cover 4 includes apron portion 41 and peripheral portion 42, and apron portion 41 laminates in lamina tecti 3, and the periphery that locates apron portion 41 is enclosed to peripheral portion 42, and peripheral portion 42 is located between electric core 2 and the internal face 121 who holds chamber 12 to the separation electric core 2 and the internal face 121 who holds chamber 12.

It is thus clear that this application adopts and extends some (peripheral portion 42 promptly) of insulating cover 4 to being located between electric core 2 and the internal face 121 that holds chamber 12, separation electric core 2 and the internal face 121 that holds chamber 12, on the one hand, can prevent when electric core 2 takes place to empty that partial position and the internal face 121 contact of electric core 2 from, lead to electric core 2 to take place the condition of deformation, and then can improve electric core 2's working property's stability, help prolonging electric core 2's life. On the other hand, the distance between the battery cell 2 and the inner wall surface 121 makes the battery cell 2 and the housing 1 have low assembly coaxiality accuracy when the battery cell 2 is installed in the accommodating cavity 12. Therefore, when the peripheral portion 42 is disposed between the battery cell 2 and the inner wall surface 121, the battery cell 2 can be supported to a certain extent, so that the position of the battery cell 2 is defined, and the assembly accuracy between the battery cell 2 and the casing 1 is improved.

In addition, since the peripheral portion 42 is made of an insulating material, the peripheral portion 42 is disposed between the battery cell 2 and the inner wall surface 121, so that insulation between the battery cell 2 and the inner wall surface 121 can be achieved, and a short circuit phenomenon caused by contact between the battery cell 2 and the inner wall surface 121 can be avoided.

Alternatively, the material of the insulating cover 4 may be insulating plastic, polyethylene (PE), polypropylene (PP), or other materials with insulating property, which is not limited in this embodiment.

Alternatively, the cover plate portion 41 and the peripheral portion 42 of the insulating cover 4 may be formed by integral molding, and the connection strength between the cover plate portion 41 and the peripheral portion 42 is good; alternatively, the cover plate 41 and the peripheral portion 42 may be provided separately, and for example, the peripheral portion 42 may be formed by bonding the cover plate 41 to the peripheral portion 42, which can facilitate an increase in the degree of freedom in designing the cover plate 41 and the peripheral portion 42.

Further, when a part of the insulating cover 4 (i.e., the peripheral portion 42) extends to the position between the battery cell 2 and the inner wall surface 121 of the accommodating cavity 12, the peripheral portion 42 surrounds the periphery of the tab of the battery cell 2, so that the tab of the battery cell 2 can be limited by the insulating cover 4 in the installation process of the battery cell 2 and the insulating cover 4, and thus the position of the battery cell 2 in the accommodating cavity 12 is realized, the coaxiality of assembly between the battery cell 2 and the casing 1 is further improved, and the assembly accuracy of the battery 100 is further improved.

In some embodiments, the battery cell 2 includes a positive electrode sheet 21, a negative electrode sheet 22, and a separator 23 disposed between the positive electrode sheet 21 and the negative electrode sheet 22, so as to implement the insulating connection between the positive electrode sheet 21 and the negative electrode sheet 22 through the separator 23, and meanwhile, in order to implement the charging and discharging functions of the battery 100, an active material coating layer 24 is further disposed on the positive electrode sheet 21 or the negative electrode sheet 22. In other words, in order to realize the normal charge and discharge functions of the battery cell 2, the active material coating layer 24 may be disposed on the positive plate 21 of the battery cell 2, and the active material coating layer 24 may also be disposed on the negative plate 22, where the active material coating layer 24 may select different materials according to different battery types, for example, the positive plate 21 of the lead storage battery 100 is coated with the active material lead oxide, the positive plate 21 of the lithium battery 100 is coated with the lithium cobaltate, the positive plate 21 of the nickel-cadmium battery 100 is coated with the active material nickel oxide powder, and the negative plate 22 is coated with the active material cadmium oxide powder, and the specific arrangement form thereof may be adjusted according to the actual structure of the battery 100.

Further, in a direction in which the center of the battery cell 2 is directed to the inner wall surface 121 of the accommodating cavity 12, the arrangement of the plurality of positive electrode sheets 21, the negative electrode sheets 22 and the separator 23 may be approximately: the positive plate 21, the diaphragm 23, the negative plate 22, the diaphragm 23, and so on, and meanwhile, along the height direction of the electric core 2, the positive plate 21 may be closer to the top cover plate 3 relative to the negative plate 22, or the positive plate 21 may be farther from the top cover plate 3 relative to the negative plate 22. For example, when the case 1 is an aluminum case, the negative electrode tab 22 is connected to the top cover plate 3, and the top cover plate 3 is the negative electrode terminal of the battery 100; when the housing 1 is a steel shell, the positive plate 21 is connected to the top cover plate 3, and the top cover plate 3 is a positive terminal of the battery 100, so the specific positions of the positive plate 21 and the negative plate 22 are not limited in this embodiment.

In this embodiment, the battery 100 will be described by taking as an example the battery 100 in which the negative electrode tab 22 is connected to the top lid plate 3 and the positive electrode tab 21 is provided with the active material coating layer 24.

Since the active material coating layer 24 in the battery 100 may expand during operation, in order to avoid the peripheral portion 42 from affecting the expansion of the active material coating layer 24, in an example, please refer to fig. 4, the active material coating layer 24 includes a main body portion 24a and a thinning portion 24b, the thinning portion 24b is disposed on a side of the main body portion 24a facing the top cover plate 3, and a thickness of the thinning portion 24b is smaller than a thickness of the main body portion 24a, at this time, the thinning portion 24b can provide a relief space for the expansion of the active material coating layer 24, and the peripheral portion 42 has a first end 421 departing from the cover plate portion 41, and a projection of the first end 421 on the active material coating layer 24 is located on the thinning portion 24b in a direction perpendicular to the height direction of the battery core 2 (e.g., the Y direction in fig. 4), so that the first end 421 can be disposed corresponding to the thinning portion 24b to avoid the peripheral portion 42 from affecting the expansion of the active material coating layer 24. In other words, when the first end 421 of the peripheral portion 42 is disposed corresponding to the thinning portion 24b, the active material coating layer 24 may expand during operation, that is, both the main body portion 24a and the thinning portion 24b may expand, and the first end 421 of the peripheral portion 42 is disposed corresponding to the thinning portion 24b, that is, the first end may not affect the expansion of the main body portion 24a, and meanwhile, since the thickness of the thinning portion 24b is smaller, the distance between the thinning portion and the peripheral portion 42 may be larger, a certain escape space may be provided for the expansion of the thinning portion 24b, so that the situation that the active material coating layer 24 contacts the peripheral portion 42 during expansion to affect the normal operation of the active material coating layer 24 or cause the structures of the positive electrode sheet 21, the negative electrode sheet 22, the separator 23, and the like of the battery cell 2 to wrinkle to affect the service life of the battery cell 2 can be avoided as much as possible, and the stability of the operation of the battery cell 2 can be improved.

Further, since the active material coating layer 24 also has a certain influence on the structures of the positive electrode sheet 21, the diaphragm 23, and the like during expansion, in order to avoid that the above-mentioned structures deform more gently under the action of the expansion force of the active material coating layer 24, a side surface of the thinning portion 24b away from the positive electrode sheet 21 may be an inclined surface, so that the thickness of the thinning portion 24b is gradually thinned along a direction from the main body portion toward the top cover plate 3, so as to achieve expansion transition between the main body portion 24a and the thinning portion 24b, so that the deformation process of the active material coating layer 24 on the structures of the positive electrode sheet 21, the diaphragm 23, and the like during expansion can be smoothly transitioned, and a large step difference does not occur at a connection position of the main body portion 24a and the thinning portion 24b, thereby avoiding a phenomenon that the positive electrode sheet 21 or the diaphragm 23 is wrinkled, and further improving the operation stability of the battery cell 2.

Note that the inclined surface of the thinned portion 24b may be an inclined plane or an inclined curved surface as long as the thickness of the thinned portion 24b can be gradually reduced. In addition, the thinning portion 24b may be formed as an inclined surface or may be formed as a step shape, and the more the number of steps is, the better the transition effect is, and the specific structure of the thinning portion 24b is not limited in this embodiment.

In another example, referring to fig. 5, in order to avoid the influence of the peripheral portion 42 on the expansion of the battery cell 2, the peripheral portion 42 has a first end 421 facing away from the cover plate portion 41, an end of the active material coating layer 24 facing the top cover plate 3 is a second end 241, and a distance H1 is formed between the second end 241 and the first end 421 along the height direction of the battery cell 2 (e.g., the X direction in fig. 4). When setting up peripheral portion 42 between electric core 2 and internal wall face 121 in order to be used for separation electric core 2 and internal wall face 121, the extension length of avoiding peripheral portion 42 overlength, do not set up peripheral portion 42 in the position between electric core 2 that the active material coating layer 24 of electric core 2 corresponds and internal wall face 121 promptly, thereby make have sufficient interval between electric core 2 and the internal wall face 121 and be used for providing the inflation space for electric core 2 inflation, and then direct extrusion in peripheral portion 42 when avoiding electric core 2 to take place the inflation, can influence the normal condition of working of electric core 2 even.

Further, as can be seen from the foregoing, the positive plate 21, the negative plate 22, and the diaphragm 23 of the battery cell 2 are all multiple plates, the multiple positive plates 21 and the multiple negative plates 22 are alternately arranged, and a diaphragm 23 is arranged between adjacent positive plates 21 and negative plates 22, so as to satisfy the insulating arrangement between the positive plates 21 and the negative plates 22. In a direction (e.g., a Y direction in fig. 5) along the electric core 2 toward the inner wall surface 121 of the accommodating cavity 12, the diaphragm 23 located at the outermost layer is the first diaphragm 231, and in a height direction (e.g., an X direction in fig. 5) of the electric core 2, one end of the first diaphragm 231 facing the top cover plate 3 is the third end 23a, and the third end 23a protrudes from the second end 241, that is, a distance H2 is provided between the third end 23a and the second end 241, at this time, when the peripheral portion 42 is installed between the electric core 2 and the inner wall surface 121, if an extension length of the peripheral portion 42 is too long, the first end 421 of the peripheral portion 42 easily interferes with the third end 23a of the first diaphragm 231, and even the first diaphragm 231 deforms, so that the electrical stability of the electric core 2 is affected.

In order to avoid the above situation, in an example, the third end 23a and the first end 421 may have a distance H3 in the height direction of the battery cell 2 (e.g., the X direction in fig. 5), and the extension length of the outer peripheral portion 42 between the battery cell 2 and the inner wall surface 121 does not exceed the area where the first diaphragm 231 is located. When the outer peripheral portion 42 is mounted between the battery cell 2 and the inner wall surface 121, the outer peripheral portion does not interfere with the third end 23a of the first diaphragm 231, and thus the first diaphragm 231 is prevented from being deformed.

In some embodiments, the battery 100 further includes an insulating film 5, the insulating film 5 is wrapped around the peripheries of the positive electrode tab 21, the negative electrode tab 22 and the first diaphragm 231 facing the top cover plate 3, and the insulating film 5 is located between the first diaphragm 231 and the outer peripheral portion 42 along a direction (e.g., Y direction in fig. 5) in which the battery cell 2 is directed to the inner wall surface 121 of the accommodating cavity 12 to block the first diaphragm 231 from the outer peripheral portion 42. That is, the first separator 231 can be tightly attached to the positive electrode sheet 21 or the negative electrode sheet 22 of the battery cell 2 by coating the first separator 231 with the insulating film 5. When the peripheral portion 42 is installed between the first diaphragm 231 and the inner wall surface 121, the insulating film 5 can protect the third end 23a of the first diaphragm 231, thereby avoiding the influence of the peripheral portion 42 on the third end 23 a.

Specifically, the insulating film 5 may be an insulating glue layer attached between the diaphragm 23 and the negative electrode sheet 22, or the insulating film 5 may also be an insulating sheet connected between the diaphragm 23 and the negative electrode sheet 22, and the form of the insulating film 5 is not particularly limited in this embodiment.

Further, when the insulating film 5 is an insulating sheet that is simultaneously connected between the diaphragm 23 and the negative electrode sheet 22, when the peripheral portion 42 is mounted between the battery cell 2 and the inner wall surface 121, although the insulating sheet avoids interference between the peripheral portion 42 and the third end 23a of the first diaphragm 231, interference between the peripheral portion 42 and the insulating sheet may occur. In order to solve the above problem, along the direction of height of electric core 2 (as in the X direction in fig. 5), the insulating piece has fourth end 51 towards top apron 3, this fourth end 51 protrusion is in the one end of negative pole piece 22 towards top apron 3, fourth end 51 has interval H4 with the one end towards top apron 3 of negative pole piece 22 promptly, thereby when the installation, installer can be convenient for observe the position at insulating piece place through fourth end 51, and then can be convenient for peripheral portion 42 dodges the insulating piece, in order to avoid taking place to interfere with the insulating piece.

Referring to fig. 6, in some embodiments, the battery 100 further includes a current collector 6, the current collector 6 is disposed on a side of the cover plate portion 41 away from the top cover plate 3, and one end of the current collector 6 is coupled to the battery cell 2. And since the current collecting piece 6 needs to be bent during the process of being mounted on the cover plate portion 41, a notch 422 is provided on the peripheral portion 42, and the notch 422 is used for providing a clearance space for the current collecting piece 6 which is not bent to extend into and be disposed on the cover plate portion 41, thereby facilitating the mounting of the current collecting piece 6 on the cover plate portion 41.

Specifically, in order to be fixed in manifold piece 6 in apron portion 41, be equipped with limit structure 411 in the one side that deviates from lamina tecti 3 of apron portion 41, this limit structure 411 includes spacing post 41a, spacing book muscle 41b and spacing straight muscle 41c, and wherein, spacing post 41a and spacing book muscle 41b divide the both sides that are located spacing straight muscle 41c to enclose the mounting groove 412 that is used for setting up manifold piece 6 jointly through spacing post 41a, spacing straight muscle 41c, spacing book muscle 41 b. Meanwhile, a fool-proof chamfer 61 is arranged on the current collecting piece 6 corresponding to the position of the limiting folding rib 41b, and when the current collecting piece 6 is installed in the installation groove 412, the fool-proof chamfer 61 is connected to the limiting folding rib 41b, so that the installation effect of the current collecting piece 6 is indicated, and the installation error of the current collecting piece 6 is avoided. Meanwhile, because spacing folding rib 41b and spacing straight muscle 41c can realize spacing at two ascending sides to current collector piece 6, although be columnar structure with spacing limit structure 411 that folding rib 41b is relative, it still can realize the limiting displacement to current collector piece 6, can also avoid limit structure 411 too big, overweight simultaneously. That is, the stopper post 41a is provided not only to limit the current collecting plate 6 but also to reduce the influence on the entire weight of the insulating cover 4.

Alternatively, when the current collecting plate 6 is mounted to the mounting groove 412, the peripheral portion 42 not only achieves the surrounding of the battery cell 2, but also achieves the surrounding of the current collecting plate 6. In order to provide a sufficient space between the current collector 6 and the battery cell 2, so as to couple the current collector 6 and the battery cell 2, in a height direction (e.g., an X direction in fig. 5) of the battery cell 2, an end of the peripheral portion 42 facing away from the cover plate portion 41, that is, a first end 421 of the peripheral portion 42 protrudes from an end of the limiting column 41a, the limiting folding rib 41b, and the limiting straight rib 41c facing away from the cover plate portion 41. At this time, there is enough space between the limiting structure 411 and the battery cell 2 to facilitate the coupling between the current collecting piece 6 and the battery cell 2.

Referring to fig. 7 to 9, in order to facilitate the electrical connection between the battery 100 and the outside, the battery 100 often further includes a terminal post 7, and the terminal post 7 is coupled to the current collecting plate 6, so that the terminal post 7 and the battery cell 2 are electrically connected through the current collecting plate 6.

Specifically, the top cover plate 3 is provided with a first mounting hole 31, the cover plate 41 is provided with a second mounting hole 413 corresponding to the first mounting hole 31, and the pole 7 is inserted into the first mounting hole 31 and the second mounting hole 413. Simultaneously, utmost point post 7 still includes main part 71 and locates the first chimb 72 at main part 71 both ends, second chimb 73, when wearing to locate utmost point post 7 in first mounting hole 31 and second mounting hole 413, first chimb 72 joint in first mounting hole 31, second chimb 73 joint in second mounting hole 413, at this moment, first mounting hole 31, second mounting hole 413 not only can realize the installation location to utmost point post 7, the connection of top cover plate 3 and apron 41 can also be realized to the first chimb 72 and the second chimb 73 of utmost point post 7.

Further, still be equipped with sealing washer 8 between second chimb 73 and second mounting hole 413, main part 71 is located to sealing washer 8 cover, and when wearing to locate first mounting hole 31 and second mounting hole 413 with utmost point post 7, sealing washer 8 joint is between second chimb 73 and second mounting hole 413 to realize the sealing connection of second chimb 73 and second mounting hole 413.

Optionally, a rib 414 is further disposed on a side of the cover plate portion 41 away from the top cover plate 3, the rib 414 is radially distributed around the second mounting hole 413, and the rib 414 is disposed to improve the overall structural strength of the cover plate portion 41, thereby preventing the cover plate portion 41 from deforming. However, in order to avoid the influence of the reinforcing rib 414 on the extension of the peripheral portion 42 between the battery cell 2 and the inner wall surface 121, in the height direction of the battery cell 2 (e.g., the X direction in fig. 8), the first end 421 of the peripheral portion 42 protrudes from the end of the reinforcing rib 414 away from the cover plate portion 41, so that the peripheral portion 42 is conveniently disposed between the battery cell 2 and the inner wall surface 121.

In some embodiments, after the cover plate portion 41 is assembled with the top cover plate 3, the cover plate portion 41 is prevented from twisting relative to the top cover plate 3, so as to prevent the electric connection among the pole 7, the current collecting plate 6 and the battery cell 2. The first positioning portion 415 is provided on the surface of the lid portion 41 that is attached to the top lid plate 3, the second positioning portion 32 is provided on the surface of the top lid plate 3 that is attached to the lid portion 41 corresponding to the first positioning portion 415, and when the lid portion 41 is attached to the top lid plate 3, the first positioning portion 415 is fitted to the second positioning portion 32, so that the relative position between the lid portion 41 and the top lid plate 3 is restricted by the provision of the first positioning portion 415 and the second positioning portion 32, and the relative rotation between the lid portion 41 and the top lid plate 3 is prevented.

Specifically, the first positioning portion 415 may be a convex column, and at this time, the second positioning portion 32 is correspondingly configured as a groove; or the first positioning portion 415 may be a groove, and at this time, the second positioning portion 32 is correspondingly configured as a convex pillar. Besides, the number of the first positioning portions 415 may be one, two, or three, and accordingly, the number of the second positioning portions 32 should be the same as the number of the first positioning portions 415. In the case where the setting space is sufficient, the first positioning portion 415 may be plural; if the setting space is insufficient, the number of the first positioning portions 415 may be one or two. That is, the arrangement form and the number of the first positioning portions 415 and the second positioning portions 32 may be adjusted according to actual circumstances, and are not particularly limited in this embodiment.

The battery 100 provided by this embodiment sets up peripheral portion 42 through the periphery at the apron portion 41 of insulating cover 4 to set up peripheral portion 42 between the internal face 121 of electric core 2 and casing 1, thereby realize the separation between electric core 2 and casing 1 internal face 121, peripheral portion 42 can also play the effect of supporting electric core 2, and then avoid electric core 2 to take place to empty the time and lead to electric core 2 to take place to warp with internal face 121 contact, influence the working property of electric core 2. Meanwhile, when the peripheral portion 42 is provided between the battery cell 2 and the inner wall surface 121, the assembly coaxiality of the battery cell 2 and the casing 1 can be improved, so that the assembly accuracy of the battery 100 can be enhanced. Besides, the arrangement of the peripheral portion 42 also enables the insulation arrangement between the battery cell 2 and the casing 1, so as to prevent the occurrence of short circuit and the like between the battery cell 2 and the casing 1.

The battery disclosed by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the battery of the present invention and the core idea thereof; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A battery, comprising:

a housing including a receiving cavity having an opening;

the battery cell is arranged in the accommodating cavity;

the top cover plate covers the opening to seal the accommodating cavity; and

2. The battery of claim 1, wherein the battery core comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, an active material coating layer is arranged on the positive plate or the negative plate, the active material coating layer comprises a main body part and a thinning part, the thinning part is arranged on one side of the main body part facing the top cover plate, and the thickness of the thinning part is smaller than that of the main body part,

3. The battery according to claim 2, wherein a side surface of the thinning portion facing away from the positive electrode tab or the negative electrode tab is an inclined surface so that a thickness of the thinning portion is gradually thinned in a direction from the main body portion toward the top cover plate.

4. The battery according to claim 1, wherein the battery core comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate, an active material coating layer is arranged on the positive plate or the negative plate, and one end of the active material coating layer facing the top cover plate is a second end;

5. The battery according to claim 4, wherein the positive plate, the negative plate and the separator are all a plurality of plates, the positive plates and the negative plates are arranged alternately, and one separator is arranged between the adjacent positive plates and the adjacent negative plates;

the diaphragm positioned on the outermost layer is a first diaphragm in the direction of pointing the battery core to the inner wall surface of the accommodating cavity, the first diaphragm protrudes relative to the second end in the height direction of the battery core, and a distance is reserved between one end, facing the top cover plate, of the first diaphragm and the first end of the peripheral portion.

6. The battery according to any one of claims 2 to 5, further comprising an insulating film covering peripheries of one ends of the positive electrode tab, the negative electrode tab, and the separator facing the top cover plate, in a direction in which the battery cell is directed toward an inner wall surface of the housing chamber, the insulating film being located between the separator and the peripheral portion to block the separator and the peripheral portion.

7. The battery according to claim 6, wherein the positive plate, the negative plate and the separator are all a plurality of plates, the positive plates and the negative plates are arranged alternately, and one separator is arranged between the adjacent positive plates and the adjacent negative plates;

along the height direction of the battery core, one end of the insulating film, facing the top cover plate, protrudes out of one end of the positive plate or the negative plate, facing the top cover plate.

8. The battery of any of claims 2-5, wherein the peripheral portion surrounds a periphery of a tab of the cell to limit a position of the cell in the receiving cavity.

9. The battery of any one of claims 1-5, further comprising a current collector, wherein the current collector is disposed on a side of the cover plate portion facing away from the top cover plate, the current collector is coupled to the electric core, and the peripheral portion is provided with a notch, and the notch is configured to provide avoidance when the current collector extends into the cover plate portion.

10. The battery according to claim 9, wherein a limiting structure is arranged on one side of the cover plate portion facing away from the top cover plate, the limiting structure comprises a limiting column, a limiting folded rib and a limiting straight rib, the limiting column and the limiting folded rib are respectively positioned on two sides of the limiting straight rib, and the limiting column, the limiting folded rib and the limiting straight rib jointly define a mounting groove for arranging the current collecting piece;

11. The battery of claim 10, wherein in the height direction of the battery core, one end of the peripheral portion facing away from the cover plate portion protrudes out of one end of the limiting column, the limiting folded rib, and the limiting straight rib facing away from the cover plate portion.

12. The battery of claim 9, wherein the top cover plate is provided with a first mounting hole, the cover plate portion is provided with a second mounting hole corresponding to the first mounting hole, the battery further comprises a pole penetrating through the first mounting hole and the second mounting hole, and the pole is coupled to the current collector;

the apron portion deviate from one side of lamina tecti still is equipped with the strengthening rib, the strengthening rib with the second mounting hole is radial distribution as the center, follows the direction of height of electric core, the peripheral portion deviate from the one end protrusion of apron portion in the strengthening rib deviate from the one end of apron portion.

13. The battery according to any one of claims 1 to 5, wherein a first positioning portion is provided on a surface of the cover plate portion that is attached to the top cover plate, wherein a second positioning portion is provided on the top cover plate corresponding to the first positioning portion, and wherein the second positioning portion is connected to the first positioning portion in a fitting manner when the cover plate portion is attached to the top cover plate.