battery

Abstract

The application relates to the technical field of batteries, and discloses a battery which comprises a battery shell, a through hole arranged on the battery shell, a pole column arranged in the through hole, a fixing part arranged on the battery shell and connected with the pole column to limit the pole column from separating from the battery shell, and an insulating layer arranged between the fixing part and the pole column and covering the outer surface of the fixing part to insulate the fixing part from the pole column. The fixing part is arranged on the battery shell and connected with the pole column, so that the pole column can be stably fixed on the battery shell, the connection stability of the pole column is improved, the insulating layer is arranged between the fixing part and the pole column and covers the outer surface of the fixing part, so that the insulating performance between the fixing part and the pole column is improved, the pole column is prevented from being electrically connected between the fixing part and the battery shell, and the safe use performance of the battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery. BACKGROUND

[0002] In the related art, the pole and the battery shell need to ensure effective insulation performance, but due to the limitation of the insulation mode, there is a risk of electrical connection between the pole and the battery shell. SUMMARY

[0003] The present application provides a battery to improve the use performance of the battery.

[0004] The present application provides a battery, comprising:

[0005] A battery shell, wherein a through hole is arranged on the battery shell;

[0006] A pole, wherein the pole is arranged in the through hole;

[0007] A fixing part, wherein the fixing part is arranged on the battery shell and connected with the pole to limit the pole from separating from the battery shell;

[0008] An insulation layer, wherein the insulation layer is arranged between the fixing part and the pole and covers the outer surface of the fixing part to insulate the fixing part from the pole.

[0009] The battery of the present application comprises a battery shell, a pole, a fixing part and an insulation layer, the pole is arranged in the through hole of the battery shell, the fixing part is arranged on the battery shell and connected with the pole, so that the pole can be stably fixed on the battery shell to improve the connection stability of the pole, and the insulation layer is arranged between the fixing part and the pole and covers the outer surface of the fixing part, so that the insulation performance between the fixing part and the pole can be improved, and the pole is prevented from being electrically connected with the battery shell through the fixing part, thereby improving the safe use performance of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0010] For a better understanding of the present disclosure, reference can be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements can be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components can have different arrangements as known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various drawings.

[0011] Wherein:

[0012] Fig. 1 is a partial cross-sectional structure schematic diagram of a battery according to a first exemplary embodiment;

[0013] Fig. 2is a partial cross-sectional structural schematic diagram of a battery according to a second example embodiment;

[0014] Fig. 3 is a partial cross-sectional structural schematic diagram of a battery according to a third example embodiment.

[0015] Reference signs are explained as follows:

[0016] 10, battery case; 11, through hole; 20, pole; 30, fixing portion; 31, connecting section; 32, pressing section; 40, insulation layer; 50, insulation member; 51, guide surface; 60, gap. DETAILED DESCRIPTION

[0017] The technical solutions in the example embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the example embodiments of the present disclosure. The example embodiments described herein are merely for illustrative purposes, and are not intended to limit the protection scope of the present disclosure, and therefore it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0018] In the description of the present disclosure, unless explicitly specified and limited, the terms "first", "second" are merely for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0019] Unless otherwise specified or explained, the terms "connection", "fixing", and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected, or signal connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0020] Further, in the description of the present disclosure, it should be understood that the "up", "down", "inner", "outer" and the like described in the example embodiments of the present disclosure are described from the angle shown in the drawings, and should not be understood as limiting the example embodiments of the present disclosure. It should also be understood that in the context, when referring to one element or feature connected to another element (one or more) "on", "under", or "inner", "outer", it can not only be directly connected to another element (one or more) "on", "under", or "inner", "outer", but also indirectly connected to another element (one or more) "on", "under", or "inner", "outer" through an intermediate element.

[0021] One embodiment of the present application provides a battery, please refer to Figs. 1 to 3 The battery comprises a battery shell 10, a through hole 11 is arranged on the battery shell 10; a pole 20, the pole 20 is arranged in the through hole 11; a fixed part 30, the fixed part 30 is arranged on the battery shell 10, and is connected with the pole 20, so as to limit the pole 20 from the battery shell 10; an insulating layer 40, the insulating layer 40 is arranged between the fixed part 30 and the pole 20, and covers the outer surface of the fixed part 30, so that the fixed part 30 is insulatedly connected with the pole 20.

[0022] The battery of one embodiment of the present application comprises a battery shell 10, a pole 20, a fixed part 30 and an insulating layer 40, the pole 20 is arranged in the through hole 11 of the battery shell 10, by arranging the fixed part 30 on the battery shell 10, and the fixed part 30 is connected with the pole 20, so as to ensure that the pole 20 is stably fixed on the battery shell 10, improve the connection stability of the pole 20, and the insulating layer 40 is arranged between the fixed part 30 and the pole 20, and covers the outer surface of the fixed part 30, so as to improve the insulation performance between the fixed part 30 and the pole 20, avoid the pole 20 from forming an electrical connection between the fixed part 30 and the battery shell 10, and improve the safe use performance of the battery.

[0023] It should be noted that the pole 20 can be insulated between the battery shell 10, and the distance between the fixed part 30 and the pole 20 is relatively close, therefore, in order to ensure that the pole 20 and the fixed part 30 have sufficient insulation capacity, the insulating layer 40 is arranged between the fixed part 30 and the pole 20, and covers the outer surface of the fixed part 30, so that the fixed part 30 and the pole 20 can have reliable insulation capacity.

[0024] The fixed part 30 is connected with the pole 20, that is, the two can be fixedly connected, and the fixed part 30 and the pole 20 are connected through a traditional connection mode, such as clamping or threaded connection. Or the fixed part 30 and the pole 20 are only in contact, that is, the fixed part 30 is pressed on the pole 20, to prevent the pole 20 from separating from the battery shell 10. On the basis of realizing the connection between the fixed part 30 and the pole 20, the fixed part 30 and the pole 20 are insulated, and the insulating layer 40 can ensure the insulation performance between the fixed part 30 and the pole 20.

[0025] The insulating layer can be a coating, such as ceramic materials such as aluminum oxide (Al2O3) and zirconium oxide (ZrO2), which are not limited here.

[0026] The outer surface of the fixed part 30 can be considered as the surface exposed by the fixed part 30, for example, the inner surface of the fixed part 30 can be arranged opposite to the pole 20, while the outer surface of the fixed part 30 is the exposed surface, just like the outer surface of the battery shell 10, the outer surface of the fixed part 30 can be the surface located outside the battery. Covering the insulating layer 40 on the outer surface of the fixed part 30 can avoid the problem of electrical connection between the pole 20 and the fixed part 30 due to too close creepage distance.

[0027] In one embodiment, the insulating layer 40 covers at least the outer surface of the fixed part 30 close to the pole 20, so as to increase the creepage distance between the pole 20 and the fixed part 30 by the insulating layer 40, so as to ensure the insulation performance between the pole 20 and the fixed part 30.

[0028] The insulating layer 40 is arranged between the fixed part 30 and the pole 20, and the insulating layer 40 covers at least the outer surface of the fixed part 30 close to the pole 20, so the insulating layer 40 can be continued from the part located on the inner surface of the fixed part 30 to the outer surface of the fixed part 30, so as to ensure a reliable insulation distance between the pole 20 and the fixed part 30, so as to ensure the insulation effect between the pole 20 and the fixed part 30.

[0029] In one embodiment, as shown in Fig. 1 The fixed part 30 includes a connecting section 31 arranged on the battery shell 10, and a pressing section 32 connected with the connecting section 31 and inclined to the connecting section 31 to press on the pole 20, wherein at least part of the insulating layer 40 is arranged on the pressing section 32, so as to ensure that the pressing section 32 close to the pole 20 has reliable insulation capability between the pole 20 and the fixed part 30, and ensure the insulation effect between the pole 20 and the fixed part 30.

[0030] Specifically, the fixed part 30 is composed of the connecting section 31 and the pressing section 32, the connecting section 31 connects the fixed part 30 to the battery shell 10, and the pressing section 32 limits the pole 20 on the battery shell 10, that is, ensures that the pole 20 is reliably arranged on the battery shell 10.

[0031] It should be noted that the pressing section 32 is arranged inclined to the connecting section 31, that is, the pressing section 32 can press on the end surface of the pole 20, and the end surface of the pole 20 here does not necessarily refer to the top end. The pressing position of the pressing section 32 is not limited here, and can be selected according to the specific structure.

[0032] In one embodiment, the insulating layer 40 covers at least the end surface of the pressing section 32 away from the connecting section 31, and the outer surface of the pressing section 32 close to the pole 20, so as to ensure that the pressing section 32 has reliable insulation capability with the pole 20.

[0033] The end face of the pressing section 32 away from the connecting section 31 is the surface directly opposite to the pole 20, and the outer surface of the pressing section 32 is the outer surface of the pressing section 32, and the insulating layer 40 covers at least the end face of the pressing section 32 away from the connecting section 31 and the outer surface of the pressing section 32 close to the pole 20, so that the insulation between the pole 20 and the fixing part 30 can be effectively realized.

[0034] In an embodiment, as shown in the drawings, the battery further comprises an insulating member 50 arranged between the fixing part 30 and the pole 20, so that the fixing part 30 fixes the pole 20 through the insulating member 50, and the insulating member 50 can realize the insulation between the fixing part 30 and the pole 20, and further in cooperation with the arrangement of the insulating layer 40, the insulation performance between the fixing part 30 and the pole 20 can be improved. Figs. 1 to 3

[0035] The insulating member 50 can be a plastic member or a rubber member, etc., and the insulating member 50 can be injection molded between the fixing part 30 and the pole 20, or the insulating member 50 can also be a sealing ring.

[0036] The insulating member 50 can further extend to between the battery shell 10 and the pole 20, so as to ensure the insulation performance between the battery shell 10 and the pole 20. Alternatively, other insulation structures or sealing structures, etc. can also be arranged between the battery shell 10 and the pole 20, which is not limited here.

[0037] In an embodiment, as shown in the drawings, the fixing part 30 and the insulating member 50 have a gap 60 therebetween, so that the fixing part 30 can reliably press the insulating member 50, and the interference between the pressing section 32 of the fixing part 30 and the insulating member 50 when the pressing section 32 is bent can be avoided, which is not conducive to the installation of the fixing part 30, and the insulation distance between the fixing part 30 and the pole 20 can be ensured, and the risk of insulation failure can be avoided. Fig. 2 The gap 60 between the fixing part 30 and the insulating member 50, i.e. the gap 60 between the end face of the pressing section 32 and the insulating member 50, can ensure the insulation distance between the fixing part 30 and the pole 20, so as to improve the insulation performance between the fixing part 30 and the pole 20.

[0038] In an embodiment, a part of the insulating layer 40 is located in the gap 60, so as to at least partially fill the gap 60 with the insulating layer 40, thereby improving the insulation performance between the fixing part 30 and the pole 20.

[0039]

[0040] ​​In one embodiment, the fixing part 30 and at least one of the insulating member 50 are provided with a guide surface 51, and the insulating layer 40 covers at least part of the guide surface 51, so that the insulating layer 40 can be conveniently attached to the fixing part 30, and the insulating layer 40 can be further conveniently attached to the end surface of the pressing section 32.

[0041] In combination Fig. 3 As shown, the top end of the insulating member 50 can be provided with a guide surface 51, so as to provide a guide position and a reserved space for the arrangement of the insulating layer 40, thereby facilitating the arrangement of the insulating layer 40.

[0042] The guide surface 51 can be substantially inclined, i.e., the guide surface can be inclined to the center line of the through hole 11, so that the guide surface 51 can provide a guide position and a reserved space for the arrangement of the insulating layer 40, thereby facilitating the arrangement of the insulating layer 40, so as to improve the protection capability of the insulating layer 40, thereby improving the safe use performance of the battery and avoiding the problem of insulation failure.

[0043] The guide surface 51 is similar to cutting an inclined surface on the insulating member 50, and the forming method of the guide surface 51 is not limited here.

[0044] In one embodiment, the insulating layer 40 covers the top end of the fixing part 30, and the top end of the insulating member 50 is not lower than the insulating layer 40, so that the insulating member 50 can provide the first insulating defense line for the fixing part 30 and the pole 20, and the insulating layer 40 can provide the second insulating defense line for the fixing part 30 and the pole 20, thereby improving the insulation capability between the fixing part 30 and the pole 20.

[0045] In one embodiment, the insulating layer 40 covers the top end of the fixing part 30, and the top end of the pole 20 is not lower than the insulating layer 40, which does not affect the welding of the surface of the pole 20, and ensures the insulation reliability between the pole 20 and the fixing part 30.

[0046] The pole 20 can realize the series or parallel connection between the batteries through the bus bar when the batteries are grouped, and by making the top end of the pole 20 not lower than the insulating layer 40, the insulating layer 40 can avoid affecting the arrangement of the bus bar, so as to ensure the reliable welding of the pole 20 and the bus bar.

[0047] It should be noted that by placing the battery on a horizontal plane, at this time, the pole 20 is arranged away from the horizontal plane, the surface farthest from the horizontal plane of the pole 20 is the top end of the pole 20, the surface farthest from the horizontal plane of the insulating layer 40 is the top end of the insulating layer 40, and the surface farthest from the horizontal plane of the insulating member 50 is the top end of the insulating member 50.

[0048] In one embodiment, the insulation layer 40 is a whole coating layer, so as to improve the insulation performance of the insulation layer 40 and avoid safety problems caused by the local absence of the insulation layer 40.

[0049] It should be noted that the insulation layer 40 can also be coated on the pole 20.

[0050] In one embodiment, the battery shell 10 and the fixing part 30 are integrally formed, which not only has a simple structure, but also can improve the connection stability of the battery shell 10 and the fixing part 30, thereby ensuring the safety performance of the battery.

[0051] In one embodiment, the battery shell 10 includes a first shell part and a second shell part connected to each other, the first shell part is a flat plate, the second shell part is formed with a receiving cavity, the flat plate is provided with a through hole 11, the fixing part 30 is arranged on the flat plate, and the pole 20 is arranged on the flat plate. Not only is the structure simple, but also the molding of the fixing part 30 can be facilitated, thereby improving the molding efficiency of the battery.

[0052] It should be noted that in some embodiments, the first shell part and the second shell part can each be formed with a receiving cavity.

[0053] In one embodiment, the battery can further include a cell, the cell is arranged in the battery shell 10, and the cell can be electrically connected with the battery shell 10, or the cell can be connected with the pole assembly on the battery shell 10.

[0054] It should be noted that the battery includes a cell and an electrolyte, and is a minimum unit capable of electrochemical reactions such as charging / discharging. The cell refers to a unit formed by winding or laminating a stack including 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. The polarity 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 an active material.

[0055] In one embodiment, the battery can be a square battery, i.e., a quadrangular prism battery. The quadrangular prism battery mainly refers to a prism shape, but is not strictly limited to whether each side of the prism is a straight line in the strict sense, and the corner between the sides can be a circular arc transition.

[0056] The battery can be a stacked battery, which not only facilitates grouping, but also can process a battery with a relatively long length. Specifically, the cell is a stacked cell, the cell has a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a separator arranged between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the stacked cell.

[0057] Alternatively, the battery can be a jelly-roll battery, i.e., a first electrode plate, a second electrode plate electrically opposite to the first electrode plate, and a separator plate disposed between the first electrode plate and the second electrode plate are wound to obtain a jelly-roll battery cell.

[0058] In one embodiment, the battery can be a cylindrical battery. The battery can be a jelly-roll battery, i.e., a first electrode plate, a second electrode plate electrically opposite to the first electrode plate, and a separator plate disposed between the first electrode plate and the second electrode plate are wound to obtain a jelly-roll battery cell.

[0059] One embodiment of the present application also provides a battery pack comprising the battery described above.

[0060] The battery pack of one embodiment of the present application comprises the battery, which comprises a battery housing 10, a pole 20, a fixing portion 30, and an insulating layer 40. The pole 20 is disposed in a through hole 11 of the battery housing 10. The fixing portion 30 is disposed on the battery housing 10, and the fixing portion 30 is connected to the pole 20, so that the pole 20 can be stably fixed on the battery housing 10, and the connection stability of the pole 20 is improved. The insulating layer 40 is disposed between the fixing portion 30 and the pole 20, and covers the outer surface of the fixing portion 30, so that the insulation performance between the fixing portion 30 and the pole 20 is improved, and the pole 20 is prevented from being electrically connected between the fixing portion 30 and the battery housing 10, so that the safe use performance of the battery pack is improved.

[0061] In one embodiment, the battery pack is a battery module or a battery pack.

[0062] The battery module comprises a plurality of batteries. The battery can be a square battery. The battery module can further comprise an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries. The battery can be a cylindrical battery. The battery module can further comprise a bracket, and the battery can be fixed on the bracket.

[0063] The battery pack comprises a plurality of batteries and a box body. The box body is used to fix the plurality of batteries.

[0064] It should be noted that the battery pack comprises a plurality of batteries, and the plurality of batteries are disposed in the box body. The plurality of batteries can be installed in the box body after forming a battery module. Alternatively, the plurality of batteries can be directly disposed in the box body, i.e., the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.

[0065] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. It is intended that the disclosure be construed as including any paterns of this disclosure that can be presented during prosecution of the patent application. Specification and drawings are, therefore, to be regarded in an illustrative rather than a restrictive sense. The true scope and spirit of the disclosure are indicated by the appended claims.

[0066] It is to be understood that the disclosure is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various changes in shape, size and arrangements of parts thereof can be made by those skilled in the art without departing from the scope of the disclosure. The scope of the disclosure is only limited by the appended claims.

Claims

1. A battery, characterized in that, include: Battery housing (10), wherein a through hole (11) is provided on the battery housing (10). The pole post (20) is inserted into the through hole (11); A fixing part (30) is disposed on the battery housing (10) and connected to the terminal post (20) to restrict the terminal post (20) from detaching from the battery housing (10). The fixing part (30) includes a connecting section (31) and a pressing section (32). The connecting section (31) is disposed on the battery housing (10), and the pressing section (32) is connected to the connecting section (31) and inclined to the connecting section (31) to press against the terminal post (20). An insulating layer (40) is disposed between the fixing part (30) and the pole post (20) and covers the outer surface of the fixing part (30) so that the fixing part (30) and the pole post (20) are insulatedly connected. An insulating component (50) is disposed between the fixing part (30) and the pole post (20). The top end of the insulating component (50) is not lower than the insulating layer (40). A guide surface (51) is provided on the insulating component (50). The guide surface (51) is inclined to the center line of the through hole (11), so that the guide surface (51) provides a guiding position and reserved space for the insulating layer (40). The insulating layer (40) is an integral coating. The insulating layer (40) is partially coated on the end face of the pressing section (32) and partially coated on the pole post (20). The upper end face of the guide surface (51) is flush with the upper surface of the insulating member (50), the lower end of the guide surface (51) is located between the upper and lower surfaces of the pressing section (32), the insulating layer (40) contacts the end face of the pressing section (32), the insulating layer (40) covers at least a portion of the guide surface (51), the bottom end of the insulating layer (40) contacts the insulating member (50), and the bottom end of the insulating layer (40) is located between the end face of the pressing section (32) and the gap formed by the insulating member (50).

2. The battery according to claim 1, characterized in that, The fixing part (30) fixes the pole post (20) through the insulating member (50).

3. The battery according to claim 1, characterized in that, The insulating layer (40) covers the top of the fixing part (30), and the top of the pole (20) is not lower than the insulating layer (40).

4. The battery according to claim 1, characterized in that, The battery casing (10) and the fixing part (30) are integrally formed.

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