CN218448331U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a housing; the battery cell is arranged in the shell and comprises a main body and a first lug, and the first lug is led out from one end of the main body; the first insulating part is arranged in the shell; the first current collecting piece is integrally formed in the first insulating piece and connected with the first tab; the maximum circumferential outer edge of the orthographic projection of the first current collecting piece facing the end face of the main body is located on the inner side of the maximum circumferential outer edge of the orthographic projection of the first insulating piece facing the end face of the main body, the problem that the first current collecting piece and the first insulating piece are failed in connection is avoided, the insulation protection of the first insulating piece on the first current collecting piece is improved, and therefore the safety use performance of the battery is improved.

Description

Battery with a battery cell

Technical Field

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

Background

In the related art, a battery cell is connected with a pole assembly through a current collecting disc, in order to ensure the insulation performance of the internal structure of the battery, the current collecting disc is mostly arranged adjacent to an insulation part, but after long-time use, the position between the current collecting disc and the insulation part is easy to deviate, so that the insulation performance is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a housing;

the battery cell is arranged in the shell and comprises a main body and a first lug, and the first lug is led out from one end of the main body;

the first insulating part is arranged in the shell;

the first current collecting piece is integrally formed in the first insulating piece and connected with the first tab;

wherein the maximum circumferential outer edge of the orthographic projection of the first current collecting member toward the end face of the main body is located inward of the maximum circumferential outer edge of the orthographic projection of the first insulating member toward the end face of the main body.

The utility model discloses the battery includes the shell, electric core, first insulator and first mass flow piece, the first utmost point ear in the main part is connected with first mass flow piece, through with first mass flow piece integrated into one piece can improve the joint strength of first mass flow piece and first insulator in first insulator, avoid first mass flow piece and first insulator to appear the problem of connection failure, guarantee the insulation protection of first insulator to first mass flow piece with this, and because first mass flow piece is located the biggest circumference outward flange of first insulator towards the orthographic projection of main part terminal surface inboard, thereby can avoid the circumference surface of first mass flow piece to surpass the circumference surface setting of first insulator, further improve the insulation protection of first insulator to first mass flow piece, thereby the safety in use performance of battery has been improved.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is an exploded schematic view of a battery according to an exemplary embodiment;

fig. 3 is a schematic exploded view of a first insulator and first and second current collecting members of a battery according to an exemplary embodiment;

fig. 4 is an exploded view of a first insulator, a first current collector, and a second current collector of a battery according to an exemplary embodiment.

The reference numerals are explained below:

10. a housing; 11. a first housing member; 12. a second housing member; 20. an electric core; 21. a main body; 22. a first tab; 23. a second tab; 30. a first insulating member; 31. a first through hole; 311. a first limiting part; 32. a second through hole; 40. a first current collecting member; 41. a tab connecting part; 42. a pole connecting part; 43. a second limiting part; 50. a pole assembly; 60. a second current collecting member; 61. a housing connecting portion; 62. a cantilever portion; 70. a second insulating member.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to fig. 4, the battery includes: a housing 10; the battery cell 20 is disposed in the casing 10, and the battery cell 20 includes a main body 21 and a first tab 22, where the first tab 22 is led out from one end of the main body 21; a first insulating member 30, the first insulating member 30 being disposed in the housing 10; the first current collecting piece 40, the first current collecting piece 40 is integrally formed in the first insulating piece 30, the first current collecting piece 40 is connected with the first tab 22; wherein the maximum circumferential outer edge of the orthographic projection of the first current collecting member 40 toward the end face of the main body 21 is located inward of the maximum circumferential outer edge of the orthographic projection of the first insulating member 30 toward the end face of the main body 21.

The utility model discloses a battery of an embodiment includes shell 10, electric core 20, first insulator 30 and first mass flow piece 40, first utmost point ear 22 on the main part 21 is connected with first mass flow piece 40, can improve the joint strength of first mass flow piece 40 and first insulator 30 through with first mass flow piece 40 integrated into one piece in first insulator 30, avoid first mass flow piece 40 and first insulator 30 to appear connecting failure's problem, thereby guarantee the insulation protection of first insulator 30 to first mass flow piece 40, and because the biggest circumference outward flange of the orthographic projection of first mass flow piece 40 towards main part 21 terminal surface is located the biggest circumference outward flange inboard of the orthographic projection of first insulator 30 towards main part 21 terminal surface, thereby can avoid the circumference surface of first mass flow piece 40 to surpass the circumference surface setting of first insulator 30, further improve the insulation protection of first insulator 30 to first mass flow piece 40, thereby the safety performance of battery has been improved.

It should be noted that, the first current collecting member 40 is integrally formed in the first insulating member 30, the first current collecting member 40 may be formed independently, and in the subsequent forming process of the first insulating member 30, the first current collecting member 40 is formed in the first insulating member 30, so that the first current collecting member 40 is integrally formed in the first insulating member 30, the connection strength between the first insulating member 30 and the first current collecting member 40 is improved, the problem of connection failure between the first insulating member 30 and the first current collecting member 40 is avoided, and the first insulating member 30 can reliably protect the first current collecting member 40. Alternatively, in some embodiments, it is not excluded that the first current collecting member 40 may be formed inside the first insulating member 30 after the formation of the first insulating member 30 is completed.

The first current collecting member 40 is integrally formed in the first insulating member 30, and it can be considered that the first current collecting member 40 is partially formed inside the first insulating member 30, and in some embodiments, it is not excluded that the first current collecting member 40 is entirely formed inside the first insulating member 30.

The first current collecting member 40 is integrally formed in the first insulating member 30, so that the internal space of the battery occupied by the first current collecting member 40 can be reduced, that is, the height accumulation of the first insulating member 30 and the first current collecting member 40 caused by the overlapping of the first insulating member 30 and the first current collecting member 40 is reduced, the overall space utilization rate of the battery is improved, meanwhile, the insulating effect of the first insulating member 30 is enhanced, and the energy density of the battery can be improved to a certain extent.

The maximum circumferential outer edge of the orthographic projection of the first current collecting member 40 towards the end face of the main body 21 is located inside the maximum circumferential outer edge of the orthographic projection of the first insulating member 30 towards the end face of the main body 21, the whole of the first current collecting member 40 may be located inside the first insulating member 30, or a part of the first current collecting member 40 may be located inside the first insulating member 30, and at this time, the orthographic projection of the first current collecting member 40 towards the first insulating member 30 needs not to exceed the first insulating member 30, that is, the circumferential outer surface of the first current collecting member 40 needs not to be arranged beyond the circumferential outer surface of the first insulating member 30 in a spatial view, so that the first current collecting member 40 is prevented from being electrically connected with the conductive structure of the circumferential outer surface of the first insulating member 30, and therefore, the first insulating member 30 is ensured to be reliably insulated and protected from the first current collecting member 40.

In one embodiment, the first insulating member 30 and the first current collecting member 40 are integrally injection-molded, which not only improves the connection stability of the first insulating member 30 and the first current collecting member 40, but also improves the assembly efficiency of the battery. The first insulating member 30 may be made of a plastic material and the first current collecting member 40 may be made of a conductive material, and further, the first current collecting member 40 may be made of a metal material, and the first current collecting member 40 may be an aluminum, copper, or aluminum-copper composite structure, etc.

The first current collecting member 40 may be separately formed, and after the formation, the first current collecting member 40 may be injection-molded in the first insulating member 30 during the injection molding of the first insulating member 30.

In one embodiment, a portion of the first current collecting member 40 is embedded inside the first insulating member 30, and another portion of the first current collecting member 40 is located outside the first insulating member 30, so that the portion of the first current collecting member 40 located outside the first insulating member 30 can be conveniently connected with other structures on the basis of ensuring the connection strength between the first insulating member 30 and the first current collecting member 40, thereby improving the adaptability of the first current collecting member 40.

It should be noted that the portion of the first current collecting member 40 embedded inside the first insulating member 30 may be connected to the first tab 22, and the portion of the first current collecting member 40 located outside the first insulating member 30 may be connected to a pole assembly or a housing. Alternatively, the portion of the first current collecting member 40 embedded inside the first insulating member 30 may be connected with the pole assembly or housing, and the portion of the first current collecting member 40 located outside the first insulating member 30 may be connected with the first tab 22.

In one embodiment, the thickness of at least a portion of the first current collecting member 40 embedded in the first insulating member 30 is smaller than the thickness of the first current collecting member 40 located outside the first insulating member 30, that is, the first current collecting member 40 may have an unequal thickness structure, so that the overall weight of the first current collecting member 40 may be reduced on the basis of ensuring the current flowing capability of the first current collecting member 40, and the energy density of the battery may be increased to some extent. The thickness of the first current collecting piece 40 embedded in the first insulating piece 30 is relatively small, and the thickness of the first insulating piece 30 can be properly reduced, so that the increase of the whole thickness of the first insulating piece 30 can be avoided on the basis of increasing the connection strength between the first current collecting piece 40 and the first insulating piece 30, and the utilization rate of the whole internal space of the battery is improved.

In one embodiment, as shown in fig. 1 and fig. 2, the battery further includes a pole assembly 50, the pole assembly 50 is disposed on the housing 10, the first current collecting member 40 includes a pole tab connecting portion 41 and a pole tab connecting portion 42, the pole tab connecting portion 42 is disposed on the pole tab connecting portion 41, the pole tab connecting portion 41 is embedded in the first insulating member 30 to be connected to the first pole tab 22, at least a portion of the pole tab connecting portion 42 is disposed outside the first insulating member 30 and facing the pole assembly 50 to be connected to the pole assembly 50, so that the pole tab connecting portion 42 disposed outside the first insulating member 30 can be conveniently connected to the pole tab assembly 50, thereby improving the assembly efficiency of the battery and facilitating the assembly of the battery.

The first tab 22 can be abutted on the tab connection portion 41, and the first tab 22 can be welded with the tab connection portion 41, the post connection portion 42 can be abutted on the post assembly 50, the post connection portion 42 can be welded with the post assembly 50, or the post connection portion 42 can be riveted with the post assembly 50, so that the overcurrent capacity between the first tab 22 and the tab connection portion 41 and the overcurrent capacity between the post connection portion 42 and the post assembly 50 are basically balanced.

It should be noted that the pole assembly 50 may be disposed in an insulating manner with the housing 10, for example, an insulating structure may be disposed between the pole assembly 50 and the housing 10, or the pole assembly 50 may be electrically connected with the housing 10, and on the basis of ensuring the insulating arrangement between the positive electrode lead-out terminal and the negative electrode lead-out terminal of the battery, the connection mode between the pole assembly 50 and the housing 10 may be selected according to actual requirements, which is not limited herein.

In one embodiment, as shown in fig. 2, the battery further includes a second insulating member 70, and the second insulating member 70 is disposed in the case 10 and between the case 10 and the first current collecting member 40 to insulate the case 10 from the first current collecting member 40, so that electrical connection between the case 10 and the pole assembly 50 through the first current collecting member 40 can be avoided, thereby ensuring reliable insulation between the case 10 and the first current collecting member 40 and improving safety of the battery.

The second insulating member 70 may be a plastic structure, or the second insulating member 70 may be a rubber structure, or the second insulating member 70 may include a metal structure, and an outer surface of the metal structure may be coated with an insulating layer, which may be alumina (Al) ₂ O ₃ ) Zirconium oxide (ZrO) ₂ ) And the like.

In one embodiment, as shown in fig. 3 and 4, the first through hole 31 is formed in the first insulating member 30, and the first current collecting member 40 is located in the first through hole 31, so that the first current collecting member 40 can be reliably formed in the first insulating member 30, thereby improving the connection strength between the first current collecting member 40 and the first insulating member 30, avoiding the problem of connection failure between the first current collecting member 40 and the first insulating member 30, and thus improving the insulation protection capability of the first insulating member 30 for the first current collecting member 40.

As shown in connection with fig. 4, the first current collecting member 40 includes a tab connecting portion 41 and a post connecting portion 42, and the post connecting portion 42 may have a substantially cylindrical structure, thereby facilitating connection of the post connecting portion 42 with the post assembly 50. And the tab connection part 41 may include a plurality of connection pieces connected to the circumferential direction of the pole connection part 42, so as to ensure a reliable connection area between the tab connection part 41 and the first tab 22, thereby ensuring the overcurrent capacity between the tab connection part 41 and the first tab 22. Accordingly, the first through-hole 31 may integrally receive the tab connection part 41, thereby securing the connection strength of the first insulating member 30 and the first current collecting member 40.

In one embodiment, as shown in fig. 4, a first limiting portion 311 is disposed on a sidewall of the first through hole 31, a second limiting portion 43 is disposed on a circumferential outer side of the first current collecting member 40, one of the first limiting portion 311 and the second limiting portion 43 is a protrusion, the other is an accommodating space, and the protrusion is located in the accommodating space, so that the connection strength between the first insulating member 30 and the first current collecting member 40 can be further improved, and the second limiting portion 43 of the first current collecting member 40 can also be reliably connected with the first insulating member 30 as a positioning structure in the process of integrally forming the first current collecting member 40 on the first insulating member 30.

In one embodiment, as shown in fig. 4, a plurality of first limiting portions 311 are disposed on a sidewall of the first through hole 31, a plurality of second limiting portions 43 are disposed on a circumferential outer side of the first collecting member 40, and structures of the plurality of first limiting portions 311 may be identical, or structures of the plurality of first limiting portions 311 may not be identical, for example, a part of the plurality of first limiting portions 311 may be a protrusion, and another part may be an accommodating space. Accordingly, the structures of the plurality of second position-limiting portions 43 may be identical, or the structures of the plurality of second position-limiting portions 43 may not be identical, for example, one portion of the plurality of second position-limiting portions 43 may be a receiving space, and another portion may be a protrusion.

The protrusion may have a circular arc structure, and the receiving space may be an arc notch, which may penetrate through the first insulating member 30 or the first collecting member 40, or the receiving space may be an arc groove. The specific structure of the projection and the receiving space is not limited herein.

In one embodiment, as shown in fig. 2, the battery cell 20 further includes a second tab 23, the first tab 22 and the second tab 23 are led out from the same end of the main body 21, and the battery further includes a second current collecting member 60, and the second current collecting member 60 connects the second tab 23 and the casing 10; wherein the first current collecting member 40 is insulated from the second current collecting member 60. First utmost point ear 22 and second utmost point ear 23 are drawn forth by the same end of main part 21 and can improve the inside whole space utilization of battery to shell 10 can be regarded as an electrode of battery and draw forth the end, can make things convenient for the connection when follow-up battery is in groups, and shell 10 area is great relatively, can guarantee to have reliable overcurrent area when the battery is in groups, with this whole charge-discharge rate of assurance battery. The first tab 22 and the second tab 23 are opposite in polarity.

It should be noted that the first tab 22 may be electrically connected to the pole assembly 50, and the second tab 23 may be electrically connected to the housing 10, at this time, the pole assembly 50 and the housing 10 may serve as two electrode leading-out ends of the battery, and the pole assembly 50 and the housing 10 may enable the two electrode leading-out ends of the battery to be located on the same side of the battery, so as to facilitate the subsequent group connection of the battery. Or, the housing 10 may include a first housing element 11 and a second housing element 12, the first housing element 11 and the second housing element 12 may be connected in an insulating manner, and the first tab 22 and the second tab 23 may be electrically connected to the first housing element 11 and the second housing element 12, respectively, when the first housing element 11 and the second housing element 12 are distributed up and down, the first tab 22 and the second tab 23 may extend from opposite ends of the main body 21, and when the first housing element 11 and the second housing element 12 are distributed left and right, the first tab 22 and the second tab 23 may be led out from the same end of the main body 21. Or, the battery may further include another pole assembly, the first tab 22 and the second tab 23 may be respectively connected to the two pole assemblies, the two pole assemblies may be connected to the same side of the housing 10, the first tab 22 and the second tab 23 may be led out from the same end of the main body 21, the two pole assemblies may be connected to opposite sides of the housing 10, and the first tab 22 and the second tab 23 may extend out from opposite ends of the main body 21.

In one embodiment, at least a portion of the second current collecting member 60 is located inside the first insulating member 30, and on the basis of ensuring the connection strength between the second current collecting member 60 and the first insulating member 30, the height and space accumulation amount of the second current collecting member 60 and the first insulating member 30 can also be reduced, so that the space utilization rate of the battery is improved.

It should be noted that the second current collecting member 60 may be detachably connected to the first insulating member 30, or the second current collecting member 60 may be non-detachably connected to the first insulating member 30, for example, it is not excluded that the second current collecting member 60 may be integrally formed in the first insulating member 30.

In one embodiment, as shown in fig. 3 and 4, the second through hole 32 is formed in the first insulating member 30, and a portion of the second current collecting member 60 is located in the second through hole 32, so that the space utilization rate in the battery is improved on the basis of improving the integration capability of the first insulating member 30 and the second current collecting member 60, and the connection strength between the first insulating member 30 and the second current collecting member 60 can be ensured, so that the first insulating member 30 can reliably separate the first current collecting member 40 from the second current collecting member 60, and the reliable insulation capability between the first current collecting member 40 and the second current collecting member 60 can be ensured.

In one embodiment, as shown in fig. 4, the second current collecting member 60 includes a housing connecting portion 61 and a cantilever portion 62, the cantilever portion 62 is connected to an inner side of the housing connecting portion 61 and located in the second through hole 32 to be connected to the second tab 23, the housing connecting portion 61 is disposed on an outer side of the first insulating member 30 and is away from the second tab 23 to be connected to the housing 10, so that the second tab 23 can be electrically connected to the housing 10 through the second current collecting member 60, so that the housing 10 serves as a tab leading-out end of the battery, and the area of the housing 10 is relatively large, so that the connection of the bus bar to the housing 10 in a subsequent battery grouping process can be facilitated, and a contact area between the bus bar and the housing 10 can be ensured, so that a reliable overcurrent capability between the bus bar and the housing 10 can be ensured.

The second current collector 60 includes a case connecting portion 61 and a cantilever portion 62, the cantilever portion 62 is connected to the inner side of the case connecting portion 61, the cantilever portion 62 may have a certain buffering capacity with the case connecting portion 61, so as to improve the connection capacity between the case connecting portion 61 and the cantilever portion 62, and also may adapt to the connection between the case connecting portion 61 and the cantilever portion 62 with the case 10 and the second pole ear 23.

In one embodiment, as shown in fig. 4, the case connection portion 61 is formed with a circumferentially closed space, the plurality of cantilever portions 62 are connected to the case connection portion 61 at intervals, the plurality of second through holes 32 are provided, the plurality of cantilever portions 62 are disposed in the plurality of second through holes 32, the plurality of cantilever portions 62 can ensure that the second current collector 60 and the second pole lug 23 have a reliable contact area, so as to ensure the current flowing capability between the second current collector 60 and the second pole lug 23, and the case connection portion 61 is a circumferentially closed structure, so as to ensure the structural strength of the case connection portion 61, and ensure that the second current collector 60 and the housing 10 have a reliable contact area, so as to ensure the current flowing capability between the second current collector 60 and the housing 10.

The second tab 23 may abut against the cantilever portion 62, the second tab 23 and the cantilever portion 62 may be welded, the case connection portion 61 may abut against the housing 10, and the case connection portion 61 and the housing 10 may be welded. The second current collector 60 may be made of a conductive material, further, the second current collector 60 may be made of a metal material, and the second current collector 60 may be an aluminum, copper, or aluminum-copper composite structure, etc.

It should be noted that, the first tab 22 and the second tab 23 may be a plurality of tabs, as shown in fig. 2, the first tab 22 and the second tab 23 may be arranged in a staggered manner, so as to ensure the insulation performance between the first tab 22 and the second tab 23, a plurality of connecting pieces of the tab connecting portion 41 may be connected to a plurality of first tabs 22, and a plurality of cantilever portions 62 may be connected to a plurality of second tabs 23. Alternatively, the first tab 22 and the second tab 23 may be one. One of the first and second tabs 22 and 23 is a positive electrode tab, and the other is a negative electrode tab.

In one embodiment, the housing 10 is provided with a liquid injection port and an explosion-proof valve, which may be located on the same side of the housing 10, and the post assembly 50 may be located on the opposite side of the housing 10 from the explosion-proof valve.

In one embodiment, as shown in fig. 1 and 2, the housing 10 includes a first housing piece 11 and a second housing piece 12, and the first housing piece 11 and the second housing piece 12 are connected to seal the battery cell 20. The first case member 11 may be formed with a receiving space, and the second case member 12 may be a cover plate. Alternatively, the first and second case members 11 and 12 may each be formed with a receiving space.

The first case member 11 comprises steel and the second case member 12 comprises steel. Alternatively, the first shell member 11 comprises aluminum and the second shell member 12 comprises aluminum. The first shell piece 11 may comprise a composite metal material, for example, the first shell piece 11 may comprise a copper aluminum composite material, and the second shell piece 12 may comprise a composite metal material, for example, the second shell piece 12 may comprise a copper aluminum composite material.

The first and second case members 11, 12 may be welded, or the first and second case members 11, 12 may be riveted.

It is to be understood that the battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

In one embodiment, the battery may be a prismatic battery, that is, the battery may be a prismatic battery, and the prismatic battery mainly refers to a battery whose shape is a prism, but does not strictly limit whether each edge of the prism is a straight line in a strict sense, and a corner between the edges is not necessarily a right angle, and may be an arc transition.

The battery can be the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, the electric core is the lamination formula electric core, and the electric core has first pole piece that range upon range of each other, with first pole piece opposite second pole piece of electric property and the diaphragm piece of setting between first pole piece and second pole piece to make and pile up formation lamination formula electric core to many pairs of first pole piece and second pole piece.

Or, the battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.

An embodiment of the utility model also provides a group battery, including foretell battery.

The utility model discloses a group battery of embodiment includes the battery, the battery includes shell 10, electric core 20, first insulator 30 and first mass flow piece 40, first utmost point ear 22 in the main part 21 is connected with first mass flow piece 40, can improve the joint strength of first mass flow piece 40 and first insulator 30 through with first mass flow piece 40 integrated into one piece in first insulator 30, avoid first mass flow piece 40 and first insulator 30 to appear connecting the problem that became invalid, with this insulation protection of first insulator 30 to first mass flow piece 40 of assurance, and because the biggest circumference outward flange of the orthographic projection of first mass flow piece 40 towards the main part 21 terminal surface is located the biggest circumference outward flange of the orthographic projection of first insulator 30 towards the main part 21 terminal surface inboard, thereby can avoid the circumference surface of first mass flow piece 40 to surpass the circumference surface setting of first insulator 30, further improve the insulation protection of first insulator 30 to first mass flow piece 40, thereby the safety performance of group battery has been improved.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack includes a plurality of batteries and a case for fixing the plurality of batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A battery, comprising:

a housing (10);

the battery cell (20), the battery cell (20) is arranged in the casing (10), the battery cell (20) comprises a main body (21) and a first tab (22), and the first tab (22) is led out from one end of the main body (21);

a first insulator (30), the first insulator (30) being disposed within the housing (10);

the first current collecting piece (40), the first current collecting piece (40) is integrally formed in the first insulating piece (30), and the first current collecting piece (40) is connected with the first tab (22);

wherein the maximum circumferential outer edge of the orthographic projection of the first current collecting piece (40) towards the end face of the main body (21) is positioned inside the maximum circumferential outer edge of the orthographic projection of the first insulating piece (30) towards the end face of the main body (21).

2. The battery according to claim 1, wherein the first insulating member (30) is integrally injection-molded with the first current collecting member (40).

3. The battery according to claim 1, wherein a portion of the first current collecting member (40) is embedded inside the first insulating member (30) and another portion of the first current collecting member (40) is located outside the first insulating member (30).

4. The battery according to claim 3, wherein the thickness of at least a portion of the first current collector (40) embedded inside the first insulator (30) is less than the thickness of the first current collector (40) outside the first insulator (30).

5. The battery according to claim 4, further comprising a pole assembly (50), wherein the pole assembly (50) is disposed on the housing (10), wherein the first current collector (40) comprises a tab connection portion (41) and a pole connection portion (42), wherein the pole connection portion (42) is disposed on the tab connection portion (41), wherein the tab connection portion (41) is embedded inside the first insulating member (30), and wherein at least a portion of the pole connection portion (42) is disposed outside the first insulating member (30) and facing the pole assembly (50) to connect with the pole assembly (50).

6. The battery according to claim 5, further comprising a second insulator (70), the second insulator (70) being disposed within the housing (10) and between the housing (10) and the first current collector (40) such that there is insulation between the housing (10) and the first current collector (40).

7. The battery according to claim 1, wherein the first insulating member (30) is internally formed with a first through hole (31), and the first current collecting member (40) is located within the first through hole (31);

the side wall of the first through hole (31) is provided with a first limiting portion (311), the circumferential outer side of the first current collecting piece (40) is provided with a second limiting portion (43), one of the first limiting portion (311) and the second limiting portion (43) is a protrusion, the other one of the first limiting portion and the second limiting portion is an accommodating space, and the protrusion is located in the accommodating space.

8. The battery according to any one of claims 1 to 7, characterized in that the cell (20) further comprises a second tab (23), the first tab (22) and the second tab (23) exiting from the same end of the body (21), the battery further comprising a second current collector (60), the second current collector (60) connecting the second tab (23) and the casing (10);

wherein the first current collecting part (40) and the second current collecting part (60) are arranged in an insulated manner.

9. The battery according to claim 8, wherein at least a portion of the second current collecting member (60) is located inside the first insulating member (30).

10. The battery according to claim 9, wherein the first insulating member (30) is internally formed with a second through hole (32), and a portion of the second current collecting member (60) is located within the second through hole (32).

11. The battery according to any one of claims 1 to 7, wherein the battery is a cylindrical battery.

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