CN219419258U - Battery cell - Google Patents
Battery cell Download PDFInfo
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- CN219419258U CN219419258U CN202320602843.3U CN202320602843U CN219419258U CN 219419258 U CN219419258 U CN 219419258U CN 202320602843 U CN202320602843 U CN 202320602843U CN 219419258 U CN219419258 U CN 219419258U
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- metal piece
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to the technical field of batteries, and provides a battery, which comprises: a battery case; the pole assembly is arranged on the battery shell and comprises a terminal and a pole, the pole penetrates through the terminal, one end of the pole, which is positioned outside the battery shell, is provided with a flanging part, and the lower surface of the flanging part is propped against the bearing part of the terminal; the material of at least part of the terminal is inconsistent with the material of the pole, the tensile strength of the pole is greater than that of the bearing part, the ratio of the height of the bearing part to the whole height of the terminal is 0.05-0.35 along the direction perpendicular to the surface of the battery shell, which is provided with the pole component, so that the connection stability of the pole and the terminal can be ensured, the structural failure risk of the bearing part is avoided, the whole energy density of the battery can be ensured, and the safety use performance of the battery can be reliably improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery.
Background
In the related art, a battery includes a battery case, a battery cell, and a post assembly disposed on the battery case and electrically connected to the battery cell. Due to the structural limitations of the pole assembly itself, the risk of fracture failure of the pole assembly may occur, thereby affecting the safe use of the battery.
Disclosure of Invention
The utility model provides a battery, which is used for improving the service performance of the battery.
The present utility model provides a battery comprising:
a battery case;
the pole assembly is arranged on the battery shell and comprises a terminal and a pole, the pole penetrates through the terminal, one end of the pole, which is positioned outside the battery shell, is provided with a flanging part, and the lower surface of the flanging part is propped against the bearing part of the terminal;
wherein, the material of at least part of the terminal is inconsistent with the material of the pole, the tensile strength of the pole is greater than that of the bearing part, and the ratio of the height of the bearing part to the whole height of the terminal is 0.05-0.35 along the direction vertical to the surface of the battery shell where the pole component is arranged.
The battery provided by the embodiment of the utility model comprises the battery shell and the pole assembly, wherein the pole assembly is arranged on the battery shell, the pole assembly is designed into the terminal and the pole, the pole is arranged on the terminal in a penetrating way, and the flanging part of the pole is propped against the bearing part of the terminal, so that the connection stability of the pole and the terminal can be ensured, and the safe use performance of the terminal and the pole is improved. And the material of at least part of terminal is inconsistent with the material of utmost point post, and the tensile strength of utmost point post is greater than the tensile strength of holding portion, and through making the ratio of holding portion's height and terminal's whole height be 0.05-0.35, not only can guarantee the connection stability of utmost point post and terminal, avoid holding portion and appear the risk of structural failure, and can guarantee battery whole energy density, can reliably improve battery's safe handling ability from this.
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 have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views.
Wherein:
fig. 1 is a partial schematic structure of a battery according to an exemplary embodiment;
fig. 2 is a schematic view showing a partial sectional structure of a battery according to an exemplary embodiment.
The reference numerals are explained as follows:
10. a battery case; 20. a pole assembly; 21. a terminal; 211. a carrying part; 212. a connection surface; 213. a first metal piece; 2131. a first portion; 2132. a second portion; 214. a second metal piece; 22. a pole; 221. and a flanging part.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.
Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.
Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.
An embodiment of the present utility model provides a battery, please refer to fig. 1 and 2, comprising: a battery case 10; the pole assembly 20, the pole assembly 20 is set up on battery body 10, the pole assembly 20 includes terminal 21 and pole 22, the pole 22 wears to locate on terminal 21, the one end that the pole 22 locates at outside of battery body 10 has flanging part 221, the lower surface of flanging part 221 supports and presses on the supporting part 211 of terminal 21; wherein, at least part of the material of the terminal 21 is inconsistent with the material of the pole 22, the tensile strength of the pole 22 is greater than that of the supporting part 211, and the ratio of the height of the supporting part 211 to the whole height of the terminal 21 is 0.05-0.35 along the direction vertical to the surface of the battery case 10 provided with the pole assembly 20.
The battery according to an embodiment of the utility model includes a battery case 10 and a pole assembly 20, wherein the pole assembly 20 is disposed on the battery case 10, and the pole assembly 20 is designed into a terminal 21 and a pole 22, and the pole 22 is disposed on the terminal 21 in a penetrating manner, and a flange 221 of the pole 22 is pressed against a bearing portion 211 of the terminal 21, so that connection stability between the pole 22 and the terminal 21 can be ensured, and safety performance of the terminal 21 and the pole 22 can be improved. The material of at least part of the terminal 21 is inconsistent with the material of the pole 22, the tensile strength of the pole 22 is greater than that of the supporting portion 211, and the ratio of the height of the supporting portion 211 to the overall height of the terminal 21 is 0.05-0.35, so that the connection stability of the pole 22 and the terminal 21 can be ensured, the risk of structural failure of the supporting portion 211 is avoided, the overall energy density of the battery can be ensured, and the safety use performance of the battery can be reliably improved.
It should be noted that the electrode post assembly 20 is disposed on the battery case 10, and the electrode post assembly 20 is insulated from the battery case 10, for example, an insulating member may be disposed between the electrode post assembly 20 and the battery case 10, or at least one of the electrode post assembly 20 and the battery case 10 may be provided with an insulating coating such as alumina (Al 2 O 3 ) Zirconium oxide (ZrO) 2 ) And ceramic materials.
The pole assembly 20 includes a terminal 21 and a pole 22, the pole 22 is disposed on the terminal 21, the terminal 21 can be disposed on the battery case 10, and the terminal 21 is insulated from the battery case 10. The post 22 may be electrically connected to the electrical core inside the battery housing 10, thereby allowing the post assembly 20 to be used as an electrode output of a battery.
The terminal 21 has the flange portion 221 at one end of the terminal 22 located outside the battery case 10, and the terminal 21 has the socket portion 211, so that the connection between the flange portion 221 and the socket portion 211 can be ensured and the connection stability of the terminal 21 and the terminal 22 can be improved by pressing the lower surface of the flange portion 221 against the socket portion 211.
The lower surface of the flanging part 221 is pressed against the supporting part 211, and the lower surface of the flanging part 221 can be directly pressed against the supporting part 211, i.e. the lower surface of the flanging part 221 can be directly contacted with the supporting part 211; alternatively, the lower surface of the burring 221 may be indirectly pressed against the socket portion 211, for example, an insulating member or a sealing member may be provided between the lower surface of the burring 221 and the socket portion 211, so that the lower surface of the burring 221 is pressed against the socket portion 211.
The end of the pole 22 located outside the battery case 10 has a burring 221, which may be considered as a burring 221 that is burred outwardly at the end of the pole 22, as shown in fig. 2, so that the lower surface of the burring 221 is pressed against the drag portion 211, and at this time, the burring 221 may have a substantially circular ring-shaped structure.
The terminal 21 has a drag portion 211, that is, the drag portion 211 extends toward the post 22, thereby forming a connection with the burring 221, thereby securing connection stability of the terminal 21 and the post 22. The drag portion 211 may have a substantially circular ring-shaped structure.
At least part of the material of the terminal 21 is inconsistent with the material of the pole 22, the tensile strength of the pole 22 is greater than that of the bearing portion 211, namely, the bearing portion 211 needs to have a certain thickness to bear the pressing force of the flanging portion 221, so that structural failure of the bearing portion 211 is avoided, and safety risks such as sealing failure and the like of the pole assembly 20 are caused. If the thickness of the supporting portion 211 is too large, the overall energy density of the battery may be reduced, and the problem of too large accumulation of the heights of the burring portion 221 and the supporting portion 211 may also be caused, thereby possibly affecting the space utilization when the batteries are grouped. In the present embodiment, by making the ratio of the height of the carrying portion 211 to the overall height of the terminal 21 be 0.05-0.35, the safety performance and energy density of the battery can be effectively improved.
As shown in connection with fig. 2, the height of the socket 211 may be denoted as a and the overall height of the terminal 21 may be denoted as b in a direction perpendicular to the surface of the battery case 10 on which the pole assembly 20 is disposed. The direction perpendicular to the surface of the battery case 10 on which the pole assembly 20 is disposed may be the height direction of the battery, for example, the pole assembly 20 is disposed on the large surface of the battery case 10, and at this time, the direction perpendicular to the surface of the battery case 10 on which the pole assembly 20 is disposed is the direction perpendicular to the large surface of the battery case 10.
In one embodiment, the ratio of the height of the carrying portion 211 to the overall height of the terminal 21 is 0.13-0.2, and the energy density of the battery can be further increased on the basis of ensuring the battery performance.
In one embodiment, the ratio of the height of the socket 211 to the overall height of the terminal 21 may be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.18, 0.2, 0.22, 0.24, 0.25, 0.26, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, or 0.35, etc.
In one embodiment, the overall height of the terminal 21 is not less than the sum of the heights of the flanging part 221 and the carrying part 211, so that the terminal 21 can be conveniently electrically connected with the conductive bars when being used for battery grouping, and the problem that the space utilization rate when the batteries are grouped is influenced due to the fact that the sum of the heights of the flanging part 221 and the carrying part 211 is too large can be avoided.
The overall height of the terminal 21 is not less than the sum of the heights of the burring 221 and the socket 211, i.e., the top end of the terminal 21 remote from the battery case 10 may be not lower than the top end of the burring 221 remote from the battery case 10.
In one embodiment, the overall height of the terminal 21 is greater than the sum of the heights of the flanging part 221 and the carrying part 211, so that not only can the electric connection between the terminal 21 and the conductive bars be facilitated when the batteries are grouped, but also the energy density of the batteries can be improved.
It should be noted that, in some embodiments, the overall height of the terminal 21 may be equal to the sum of the heights of the burring 221 and the socket 211.
In one embodiment, the flange 221 is riveted to the terminal 21, so that not only can connection between the pole 22 and the terminal 21 be facilitated and installation efficiency of the pole 22 and the terminal 21 be improved, but also connection stability between the pole 22 and the terminal 21 can be improved and risk of failure of the pole assembly 20 is avoided.
The pole 22 may be riveted to the terminal 21 by a burring riveting process, that is, by deforming the pole 22, a burring 221 is formed, thereby being reliably pressed against the socket portion 211 of the terminal 21, thereby ensuring the connection strength of the pole 22 and the terminal 21. The burring 221 is riveted to the terminal 21, and the tensile strength of the burring 221 is greater than that of the socket 211, so that the socket 211 needs to occupy a certain range of thickness of the terminal 21 in order to secure the riveting force received by the socket 211.
In one embodiment, as shown in fig. 1, a side of the terminal 21 facing away from the burring 221 has a connection surface 212 for connecting the conductive bars, so that electrical connection of the conductive bars to the connection surface 212 can be conveniently achieved, and efficiency in battery pack can be improved.
The connection surface 212 of the terminal 21 is perpendicular to the surface of the battery case 10 where the pole assembly 20 is provided, i.e., the connection surface 212 is perpendicular to the large surface of the battery case 10, whereby connection of the conductive bars with the connection surface 212 can be conveniently accomplished, thereby improving the connection efficiency of the conductive bars with the connection surface 212.
It should be noted that in some embodiments, it is not excluded that the connection surface 212 of the terminal 21 is not perpendicular to the surface of the battery housing 10 where the pole assembly 20 is provided.
In one embodiment, the flange 221 is embedded in the terminal 21, so that the connection stability between the pole 22 and the terminal 21 can be further improved, and the safety performance of the pole assembly 20 can be reliably improved.
The burring 221 is inlaid in the terminal 21, and it may be considered that the burring 221 is located in the terminal 21, for example, the post 22 may be riveted to the socket portion 211 by a riveting process, and the burring 221 is inlaid in the terminal 21.
In one embodiment, the terminal 21 comprises aluminum and the post 22 comprises copper, which not only ensures the usability of the post assembly 20, but also facilitates the electrical connection of the post 22 to the tab of the cell, and also allows the terminal 21 to be electrically connected to the conductive strip.
The post 22 may be welded to the tab of the battery cell, for example, the post 22 may be welded directly to the tab of the battery cell, or the post 22 may be welded to the tab of the battery cell via a tab, where the post 22 includes copper, the tab or tab may be copper.
The terminal 21 includes aluminium, and the terminal 21 can be connected with the busbar, and for example, the busbar can be the aluminum part, and when terminal 21 and the busbar welding, can make things convenient for terminal 21 and the welding of busbar to can guarantee terminal 21 and the welding stability of busbar.
In one embodiment, the terminal 21 is a composite metal structure, the terminal 21 includes a first metal piece 213 and a second metal piece 214 with different materials, the second metal piece 214 is embedded in the first metal piece 213, and the material of the second metal piece 214 is consistent with that of the pole 22, so that the connection between the second metal piece 214 and the pole 22 can be conveniently realized, and the safe use performance of the pole assembly 20 can also be ensured.
The first metal piece 213 may be aluminum, the second metal piece 214 may be copper, and the material of the post 22 may also be copper.
In one embodiment, the first metal piece 213 includes the carrying portion 211, so that the flange portion 221 of the pole 22 can be reliably connected with the carrying portion 211, and the connection stability of the pole 22 and the terminal 21 is improved.
In one embodiment, the burring 221 is welded to the second metal member 214, so that the connection strength of the post 22 and the terminal 21 can be further improved.
The flange portion 221 of the pole 22 may be riveted with the carrying portion 211 of the terminal 21, and the flange portion 221 is welded with the second metal member 214, so that the connection strength between the pole 22 and the terminal 21 may be effectively improved. The material of the flange portion 221 is consistent with that of the second metal piece 214, so that welding of the flange portion 221 and the second metal piece 214 can be facilitated, butt welding can be adopted for the flange portion 221 and the second metal piece 214, connection strength between the high pole 22 and the terminal 21 can be ensured, and density performance of the pole assembly 20 can be improved. The burring 221 and the second metal member 214 may be laser welded.
In one embodiment, the flange portion 221 is embedded in the second metal piece 214, so that the connection performance between the flange portion 221 and the second metal piece 214 can be improved, and the welding between the flange portion 221 and the second metal piece 214 can be facilitated, so as to improve the sealing performance of the pole assembly 20.
In one embodiment, the lower surface of the burring 221 is flush with the lower surface of the second metal 214; the lower surface of the second metal piece 214 is also pressed against the supporting portion 211, so that not only the integration level of the pole assembly 20 can be improved, but also the structural stability of the pole assembly 20 can be improved, and the safe use performance of the pole assembly 20 is improved.
As shown in fig. 2, the lower surface of the burring 221 and the lower surface of the second metal member 214 are flush, so that the lower surface of the burring 221 and the lower surface of the second metal member 214 can simultaneously abut against the carrying portion 211.
In one embodiment, the ratio of the height of the second metal member 214 to the height of the first metal member 213 is 0.08-0.3 along the direction perpendicular to the surface of the battery case 10 where the post assembly 20 is disposed, so that the second metal member 214 can be reliably connected with the flanging portion 221, the stability of the post assembly 20 can be improved, and the second metal member 214 can be prevented from being too high, which is detrimental to the subsequent battery grouping, and the space utilization rate during the battery grouping can be improved to a certain extent.
As shown in connection with fig. 2, the height of the second metal piece 214 may be denoted as c, and the height of the first metal piece 213 may be denoted as b, and at this time, the height of the first metal piece 213 may be equal to the entire height of the terminal 21.
The ratio of the height of the second metal piece 214 to the height of the first metal piece 213 may be 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.18, 0.2, 0.22, 0.24, 0.25, 0.26, 0.28, 0.29, or 0.3, etc.
In one embodiment, as shown in fig. 1, the first metal piece 213 includes a first portion 2131 and a second portion 2132, the first portion 2131 is disposed on the battery housing 10, the first portion 2131 includes a carrying portion 211, and the second portion 2132 is connected to the first portion 2131 and extends towards a side far away from the battery housing 10, so that the second portion 2132 can be electrically connected with the conductive bars conveniently, the connection between the pole assembly 20 and the conductive bars when the batteries are grouped is improved, and the assembly efficiency when the batteries are grouped can be improved to a certain extent.
The second portion 2132 may have a connection surface 212 to thereby conveniently achieve connection with the conductive bars, and an insulating member may be provided between the first portion 2131 and the battery case 10 to thereby secure insulating performance between the first portion 2131 and the battery case 10.
In one embodiment, the extending direction of the second portion 2132 is perpendicular to the surface of the battery housing 10 where the pole assembly 20 is provided, i.e., the extending direction of the second portion 2132 may be perpendicular to the large surface of the battery housing 10, whereby connection between the second portion 2132 and the conductive bars may be facilitated.
The battery includes a cell and an electrolyte, and is 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 stacked portion, wherein the stacked portion comprises a first pole piece, a separator and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. Wherein the polarities of the first pole piece and the second pole piece can be interchanged. The first and second pole pieces are coated with an active substance.
In one embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, where the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and corners between sides are not necessarily right angles, and may be arc transitions.
The battery can be a laminated battery, so that the battery is not only convenient to group, but also long in length. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.
Alternatively, the battery may be a wound battery in which a first pole piece, a second pole piece opposite in electrical property to the first pole piece, and a separator sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.
In one embodiment, the battery may be a cylindrical battery. The battery can be a winding type battery, namely, a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece are wound to obtain a winding type battery cell.
It should be noted that the large surface of the battery case 10 may be regarded as the surface of the battery case 10 having the largest area, and further, the large surface of the battery case 10 may be regarded as the surface of the battery case 10 having the largest heat generation, and the battery case 10 may include two opposite large surfaces.
In one embodiment, the length of the cell is h,400 mm.ltoreq.h.ltoreq.2800 mm, the width of the cell is k, the height of the cell is g,2 k.ltoreq.h.ltoreq.80 k, and/or 0.5 g.ltoreq.k.ltoreq.20 g.
Further, k is more than or equal to 80mm and less than or equal to 200mm, g is more than or equal to 10mm and less than or equal to 100mm.
Preferably, 4 k.ltoreq.h.ltoreq.25k, and/or 2 g.ltoreq.k.ltoreq.10g.
The battery in the above embodiment has a large ratio of the length to the width of the battery, and further, a large ratio of the width to the height of the battery, while securing a sufficient energy density.
In one embodiment, the length of the battery is h, the width of the battery is k, and h is more than or equal to 4k and less than or equal to 7k, namely the ratio of the length to the width of the battery in the embodiment is larger, so that the energy density of the battery is increased, and the subsequent formation of the battery pack is facilitated.
In one embodiment, the height of the battery is g,3 g.ltoreq.k.ltoreq.7g, the ratio of the width to the height of the battery is large, and the battery is also convenient to form under the condition of ensuring enough energy density.
Alternatively, the length of the battery may be 800mm-1800mm, the width of the battery may be 80mm-180mm, and the height of the battery may be 15mm-35mm.
In one embodiment, the thickness of the battery case 10 is 0.1mm to 0.5mm, so that the weight of the battery case 10 can be reduced, thereby improving the energy density of the battery.
The thickness of the battery case 10 may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, or the like.
An embodiment of the present utility model also provides a battery pack including the above battery.
The battery pack according to an embodiment of the present utility model includes a battery, the battery includes a battery case 10 and a pole assembly 20, the pole assembly 20 is disposed on the battery case 10, the pole assembly 20 is designed as a terminal 21 and a pole 22, and the pole 22 is disposed on the terminal 21 in a penetrating manner, and a flange 221 of the pole 22 abuts against a supporting portion 211 of the terminal 21, so that connection stability between the pole 22 and the terminal 21 can be ensured, and safety performance of the terminal 21 and the pole 22 is improved. And the material of at least part of the terminal 21 is inconsistent with the material of the pole 22, the tensile strength of the pole 22 is greater than that of the supporting part 211, and the ratio of the height of the supporting part 211 to the whole height of the terminal 21 is 0.05-0.35, so that the connection stability of the pole 22 and the terminal 21 can be ensured, the structural failure risk of the supporting part 211 is avoided, the whole energy density of the battery can be ensured, and the safety use performance of the battery pack can be reliably 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 fixed a plurality of batteries. The battery may be a cylindrical battery, and the cylindrical battery may be disposed on the support plate, thereby forming a battery module.
The battery pack comprises a plurality of batteries and a box body, wherein the box body is used 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 case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (16)
1. A battery, comprising:
a battery case (10);
the battery comprises a battery shell (10), and is characterized by comprising a pole assembly (20), wherein the pole assembly (20) is arranged on the battery shell (10), the pole assembly (20) comprises a terminal (21) and a pole (22), the pole (22) is arranged on the terminal (21) in a penetrating mode, one end, located outside the battery shell (10), of the pole (22) is provided with a flanging part (221), and the lower surface of the flanging part (221) is abutted against a carrying part (211) of the terminal (21);
wherein, the material of at least part of the terminal (21) is inconsistent with the material of the pole (22), the tensile strength of the pole (22) is greater than the tensile strength of the bearing part (211), and the ratio of the height of the bearing part (211) to the whole height of the terminal (21) is 0.05-0.35 along the direction vertical to the surface of the battery shell (10) provided with the pole assembly (20).
2. The battery according to claim 1, characterized in that the ratio of the height of the carrying portion (211) to the overall height of the terminal (21) is 0.13-0.2.
3. The battery according to claim 1, wherein the overall height of the terminal (21) is not less than the sum of the heights of the burring (221) and the socket (211).
4. A battery according to claim 3, characterized in that the overall height of the terminal (21) is greater than the sum of the heights of the flange portion (221) and the carrying portion (211).
5. The battery according to claim 4, characterized in that the side of the terminal (21) facing away from the burring (221) has a connection surface (212) for connecting a conductive strip;
wherein the connection surface (212) is perpendicular to the surface of the battery case (10) on which the pole assembly (20) is provided.
6. The battery according to claim 1, wherein the burring (221) is embedded in the terminal (21).
7. The battery according to claim 1, characterized in that the terminal (21) comprises aluminum and the post (22) comprises copper.
8. The battery according to any one of claims 1 to 7, wherein the terminal (21) is of a composite metal structure, the terminal (21) comprises a first metal piece (213) and a second metal piece (214) which are different in material, the second metal piece (214) is inlaid in the first metal piece (213), and the material of the second metal piece (214) is consistent with the material of the pole (22).
9. The battery according to claim 8, wherein the first metal piece (213) comprises the socket portion (211).
10. The battery according to claim 8, characterized in that the burring (221) is welded with the second metal piece (214).
11. The battery according to claim 8, characterized in that the burring (221) is embedded in the second metal piece (214).
12. The battery according to claim 11, wherein a lower surface of the burring (221) and a lower surface of the second metal piece (214) are flush;
wherein the lower surface of the second metal piece (214) is also pressed against the carrying part (211).
13. The battery according to claim 8, characterized in that the ratio of the height of the second metal piece (214) to the height of the first metal piece (213) is 0.08-0.3 in a direction perpendicular to the surface of the battery case (10) on which the terminal assembly (20) is provided.
14. The battery according to claim 8, wherein the first metal piece (213) comprises a first portion (2131) and a second portion (2132), the first portion (2131) being provided on the battery housing (10), the first portion (2131) comprising the towing portion (211), the second portion (2132) being connected to the first portion (2131) and extending towards a side remote from the battery housing (10);
wherein the extending direction of the second portion (2132) is perpendicular to the surface of the battery housing (10) on which the pole assembly (20) is provided.
15. The battery according to any one of claims 1 to 7, wherein the battery is a quadrangular-type battery.
16. The battery according to any one of claims 1 to 7, characterized in that the burring (221) is riveted to the terminal (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320602843.3U CN219419258U (en) | 2023-03-24 | 2023-03-24 | Battery cell |
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