Tab fixing device and battery

Abstract

The utility model provides a pole lug fixing device and a battery, relates to the technical field of battery accessories, and aims to optimize the structure of the pole lug fixing device to a certain extent and reduce the risk that a pole lug of a battery cell is stressed and cracked when being subjected to vibration impact. The utility model provides a tab fixing device. The tab fixing device comprises a shell, a tab bracket and a fastener, first positioning parts are formed at the two ends of the shell in the first direction, second positioning parts are formed at the positions, corresponding to the first positioning parts, of the tab support, and the fasteners penetrate through the second positioning parts to be connected with the first positioning parts, so that the tab support is connected with the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of battery accessories, in particular to a tab fixing device and a battery. Background Art

[0002] The battery mainly includes a shell, a battery cell, and a tab bracket. During assembly, the tab of the battery cell is connected to the tab bracket and encapsulated in the shell. During the use of the battery, it is inevitable to be subjected to vibration and shock. In existing batteries, the connection between the tab bracket and the shell is mostly achieved by hot melting, but this method is very likely to cause the connection between the tab bracket and the shell to break after being subjected to vibration and shock, thereby causing the tab to be pulled apart.

[0003] Therefore, there is an urgent need to provide a tab fixing device and a battery to solve the problems existing in the prior art to a certain extent. Utility Model Content

[0004] The utility model aims to provide a tab fixing device and a battery, so as to optimize the tab fixing device structure to a certain extent and reduce the risk of the tab of the battery cell being torn by force when subjected to vibration impact.

[0005] The utility model provides a pole lug fixing device, comprising a shell, a pole lug bracket and a fastener; the shell is formed with a first positioning portion at both ends in a first direction, the pole lug bracket is formed with a second positioning portion at a position corresponding to the first positioning portion, and the fastener passes through the second positioning portion and is connected to the first positioning portion to connect the pole lug bracket to the shell.

[0006] Among them, the second positioning part includes a main body and a reinforcement part; a positioning hole is formed on the first positioning part, and a mounting hole is formed on the main body. The reinforcement part is annular, and a positioning hole corresponding to the positioning hole is formed on the reinforcement part. The reinforcement part is arranged in the mounting hole, and the fastener passes through the positioning hole and enters the positioning hole to be connected with the first positioning part, and the first positioning part extends along the second direction.

[0007] Specifically, the main body is made of plastic material, and the main body and the tab bracket are integrally formed, and the reinforcement is made of metal material.

[0008] Specifically, one end of the reinforcing portion away from the first positioning portion protrudes from an end surface of the main body portion that is away from the first positioning portion.

[0009] Furthermore, the protruding dimension of the reinforcement portion is between 0.1 mm and 0.3 mm.

[0010] Among them, the main body is an axisymmetric structure, and the first rounded section, the second rounded section, the third rounded section and the transition section are formed on both sides of the main body. One end of the first rounded section is connected to the pole ear bracket, and the other end is connected to one end of the second rounded section, the other end of the second rounded section is connected to one end of the third rounded section, and the other end of the third rounded section is connected to the transition section.

[0011] Specifically, the fillet sizes of the first fillet segment, the second fillet segment and the third fillet segment are all between 3 mm and 8 mm, and the included angle a between the first fillet segment and the tab support is between 30° and 60°.

[0012] Furthermore, the thickness of the second positioning portion is smaller than the thickness of the tab support, and the thickness h of the second positioning portion and the thickness H of the tab support satisfy h=0.3H-0.6H.

[0013] Furthermore, the shell includes a main shell, and at least one partition is provided in the main shell, and the partition divides the main shell into at least two accommodating chambers; the pole ear brackets are arranged in a one-to-one correspondence with the accommodating chambers, and a plurality of third positioning portions extending along the second direction are formed on the partition, and the first positioning portions on two adjacent pole ear brackets facing the partition equally divide the third positioning portions on the partition, and the fastener passes through the first positioning portion and is connected to the third positioning portion.

[0014] Compared with the prior art, the tab fixing device provided by the utility model has the following advantages:

[0015] The utility model provides a pole lug fixing device, comprising a shell, a pole lug bracket and a fastener; the shell is formed with first positioning parts at both ends in a first direction, the pole lug bracket is formed with a second positioning part at a position corresponding to the first positioning part, and the fastener passes through the second positioning part and is connected to the first positioning part to connect the pole lug bracket to the shell.

[0016] From this analysis, it can be seen that by forming a first positioning portion at both ends of the shell in the first direction, and forming a second positioning portion at the position of the pole ear bracket corresponding to the first positioning portion, the pole ear bracket and the shell can be stably connected by passing the fastener through the second positioning portion and connecting it with the first positioning portion. Since the present application abandons the traditional method of connecting the pole ear bracket and the shell by hot melting, the structural strength of the pole ear bracket and the shell will not be changed, and a stable and reliable connection between the two is only achieved through fasteners, thereby avoiding to a certain extent the breakage of the connection position between the pole ear bracket and the shell due to vibration impact, resulting in the pole ear bracket being separated from the shell and moving inside the shell, causing the risk of the pole ear being torn by force.

[0017] In addition, the utility model also provides a battery, comprising a battery cell and the above-mentioned tab fixing device; the battery cell is arranged in the shell, and the tab of the battery cell is connected to the tab bracket.

[0018] The battery using the tab fixing device provided in the present application can avoid the problem of the tab being torn due to stress caused by the movement of the tab holder, since the connection between the tab holder and the shell is more reliable, thereby improving the overall battery safety and service life to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a housing in a tab fixing device provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a tab support in a tab fixing device provided in an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of the second positioning portion in the tab fixing device provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structure of a battery provided in an embodiment of the utility model.

[0024] In the figure: 1-shell; 101-main shell; 102-partition; 1021-third positioning portion; 103-first positioning portion; 104-positioning hole; 2-ear bracket; 201-second positioning portion; 2011-main body; 2012-first fillet section; 2013-second fillet section; 2014-third fillet section; 2015-transition section; 2016-reinforcement portion; 3-fastener; 4-ear;

[0025] S1-first direction; S2-second direction. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0031] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0032] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0033] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0034] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.

[0035] like Figure 1-Figure 3 As shown, the utility model provides a device for fixing a pole lug 4, comprising a shell 1, a pole lug bracket 2 and a fastener 3; the shell 1 is formed with a first positioning portion 103 at both ends in a first direction S1, the pole lug bracket 2 is formed with a second positioning portion 201 at a position corresponding to the first positioning portion 103, and the fastener 3 passes through the second positioning portion 201 and is connected to the first positioning portion 103 to connect the pole lug bracket 2 to the shell 1.

[0036] Compared with the prior art, the terminal lug 4 fixing device provided by the utility model has the following advantages:

[0037] The pole lug 4 fixing device provided by the utility model forms a first positioning portion 103 at both ends of the shell 1 in the first direction S1, and forms a second positioning portion 201 at the position of the pole lug bracket 2 corresponding to the first positioning portion 103, so that the pole lug bracket 2 can be stably connected to the shell 1 by passing the fastener 3 through the second positioning portion 201 and connecting it with the first positioning portion 103. Since the present application abandons the traditional method of connecting the pole lug bracket 2 and the shell 1 by hot melting, the structural strength of the pole lug bracket 2 and the shell 1 will not be changed, and a stable and reliable connection between the two is only achieved through the fastener 3, thereby avoiding to a certain extent the breakage of the connection position between the pole lug bracket 2 and the shell 1 caused by vibration impact, resulting in the pole lug bracket 2 being separated from the shell 1 in the shell 1 and moving, causing the risk of the pole lug 4 being torn by force.

[0038] The fastener 3 in the present application is preferably a bolt, which can directly pass through the second positioning portion 201 and connect with the first positioning portion 103, thereby achieving a quick connection between the pole lug bracket 2 and the housing 1, and is more convenient to disassemble.

[0039] Alternatively, if Figure 1-Figure 3 As shown, the second positioning portion 201 in the present application includes a main body 2011 and a reinforcement portion 2016; a positioning hole 104 is formed on the first positioning portion 103, a mounting hole is formed on the main body 2011, the reinforcement portion 2016 is annular, and the reinforcement portion 2016 is formed with an alignment hole corresponding to the positioning hole 104, the reinforcement portion 2016 is arranged in the mounting hole, the fastener 3 passes through the alignment hole into the positioning hole 104 and is connected to the first positioning portion 103, and the first positioning portion 103 extends along the second direction S2.

[0040] The number of the first positioning parts 103 in the present application can be multiple, and the multiple first positioning parts 103 can be formed on the edge of the shell 1 along the circumference of the shell 1 and extend along the second direction S2, so that the first positioning parts 103 can form positioning holes 104 extending along the second direction S2, and the mounting holes formed on the main body 2011 can provide a stable installation space for the reinforcement part 2016. By arranging the reinforcement part 2016 in the mounting hole, the structural strength of the overall second positioning part 201 can be improved to a certain extent, so that when the fastener 3 is installed, it is only connected and assembled with the reinforcement part 2016, so that the main body 2011 can be protected, and the problem of the main body 2011 being damaged by pressure during the installation of the fastener 3 can be avoided.

[0041] It can be understood that the main body 2011 in the present application is made of plastic material, and the main body 2011 and the tab bracket 2 are integrally formed, and the reinforcement part 2016 is made of metal material.

[0042] Since the pole lug bracket 2 is usually made of plastic material, the main body 2011 is made of the same material as the pole lug bracket 2, so that one-piece molding can be better achieved, thereby improving the completion and strength of the overall structure. Since the strength of plastic materials is relatively low, the reinforcing part 2016 is made of metal material to strengthen the connection strength with the fastener 3, thereby ensuring the stability of the overall structure after connection.

[0043] Optionally, one end of the reinforcing portion 2016 in the present application that is away from the first positioning portion 103 protrudes from an end surface of one side of the main body portion 2011 that is away from the first positioning portion 103 .

[0044] By making one end of the reinforcing portion 2016 away from the first positioning portion 103 protrude from the end surface of the main body 2011 that is away from the first positioning portion 103, when the fastener 3 is assembled into the reinforcing portion 2016 and enters the first positioning portion 103 to reach the extreme position, a certain gap can still be maintained between the end of the fastener 3 and the main body 2011, thereby avoiding the problem of the main body 2011 being compressed, damaged or fractured due to excessive installation of the fastener 3.

[0045] Preferably, the protruding dimension of the reinforcement portion 2016 in the present application is between 0.1 mm and 0.3 mm.

[0046] Alternatively, if Figure 2 Combination Figure 3 As shown, the main body 2011 in the present application is an axisymmetric structure, and the first rounded section 2012, the second rounded section 2013, the third rounded section 2014 and the transition section 2015 are formed on both sides of the main body 2011. One end of the first rounded section 2012 is connected to the pole ear bracket 2, and the other end is connected to one end of the second rounded section 2013, the other end of the second rounded section 2013 is connected to one end of the third rounded section 2014, and the other end of the third rounded section 2014 is connected to the transition section 2015.

[0047] By making the main body 2011 an axially symmetrical structure, the force on the main body 2011 can be made more uniform. By forming a first rounded section 2012, a second rounded section 2013 and a third rounded section 2014 on both sides of the main body 2011 in the present application, the problem of stress concentration can be further reduced, making the main body 2011 in the present application less likely to deform, thereby improving the structural strength of the second positioning portion 201.

[0048] Preferably, the fillet sizes of the first fillet segment 2012, the second fillet segment 2013 and the third fillet segment 2014 in the present application are all between 3 mm and 8 mm, and the angle a between the first fillet segment 2012 and the tab support 2 is between 30° and 60°.

[0049] Optionally, the thickness of the second positioning portion 201 in the present application is less than the thickness of the tab support 2 , and the thickness h of the second positioning portion 201 and the thickness H of the tab support 2 satisfy h=0.3H-0.6H.

[0050] By making the thickness of the second positioning portion 201 smaller than the thickness of the pole lug bracket 2, the risk of the fastener 3 accidentally touching the battery cell and causing a short circuit due to operating errors during installation can be avoided. At the same time, the creepage distance and electrical clearance between metal parts such as bolts and the pole lug 4 or bus of the battery cell can be increased, thereby improving electrical safety.

[0051] Alternatively, if Figure 1 As shown, the shell 1 in the present application includes a main shell 101, and at least one partition 102 is provided in the main shell 101, and the partition 102 divides the main shell 101 into at least two accommodating chambers; the pole ear brackets 2 are arranged in a one-to-one correspondence with the accommodating chambers, and a plurality of third positioning portions 1021 extending along the second direction S2 are formed on the partition 102, and the first positioning portions 103 on two adjacent pole ear brackets 2 facing the partition 102 are both separated by the third positioning portions 1021 on the partition 102, and the fastener 3 passes through the first positioning portion 103 and is connected to the third positioning portion 1021.

[0052] The partition 102 provided in the main shell 101 can divide the space in the main shell 101 into two accommodating chambers, so as to accommodate more battery cells. It is understandable that when there are two partitions 102, the main shell 101 can be divided into three accommodating chambers, and the specific number of partitions 102 is designed according to the size of the battery cell, the size of the main shell 101 and the number of battery cells to be carried.

[0053] Correspondingly, after two accommodating cavities are separated in the main shell 101, the number of the pole ear brackets 2 in the present application is also two, and since one side of the pole ear bracket 2 is overlapped on the edge of the main shell 101, and the other side needs to be overlapped on the partition 102, a plurality of third positioning portions 1021 are formed on the partition 102 in the present application, and the third positioning portions 1021 on the partition 102 are evenly divided by the first positioning portions 103 formed on the two adjacent pole ear brackets 2, that is, when the number of the third positioning portions 1021 on the partition 102 is two When there are two third positioning portions 1021, one of the third positioning portions 1021 corresponds to the first positioning portion 103 of a pole lug bracket 2 facing the partition 102, and the other third positioning portion 1021 corresponds to the first positioning portion 103 of another pole lug bracket 2 facing the partition 102. That is to say, when the number of the third positioning portions 1021 on the partition 102 is two, the number of the first positioning portions 103 of the pole lug bracket 2 facing the partition 102 is one, thereby achieving a stable connection with the partition 102.

[0054] It should be supplemented here that the number of first positioning portions 103 formed on the edge of the main shell 101 can be multiple, and preferably, the first positioning portion 103 in the present application is formed on the side wall of the main shell 101 parallel to the partition 102, and two first positioning portions 103 are formed on the side wall on one side, and accordingly, two second positioning portions 201 are formed on the side of the pole ear bracket 2 facing the side wall of the main shell 101, so that it can be stably connected with the first positioning portion 103.

[0055] In addition, if Figure 4 As shown, the utility model also provides a battery, including a battery cell and the above-mentioned pole lug 4 fixing device; the battery cell is arranged in the housing 1, and the pole lug 4 of the battery cell is connected to the pole lug bracket 2.

[0056] The battery using the pole lug 4 fixing device provided in the present application can avoid the problem of the pole lug 4 being torn due to the force caused by the movement of the pole lug bracket 2, because the connection between the pole lug bracket 2 and the shell 1 is more reliable, thereby improving the overall battery safety and service life to a certain extent.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tab fixing device, characterized in that: It includes a shell, a tab bracket and a fastener; The shell has first positioning parts formed at both ends in the first direction, the tab bracket has second positioning parts formed at positions corresponding to the first positioning parts, and the fastener passes through the second positioning parts and is connected to the first positioning parts to connect the tab bracket to the shell.

2. The tab fixing device according to claim 1, characterized in that: The second positioning portion includes a main body portion and a reinforcement portion; A positioning hole is formed on the first positioning portion, a mounting hole is formed on the main body portion, the reinforcing portion is annular, and a positioning hole corresponding to the positioning hole is formed on the reinforcing portion, the reinforcing portion is arranged in the mounting hole, the fastener passes through the positioning hole and enters the positioning hole to be connected with the first positioning portion, and the first positioning portion extends along the second direction.

3. The tab fixing device according to claim 2, characterized in that: The main body is made of plastic material, and the main body and the tab bracket are integrally formed, and the reinforcement part is made of metal material.

4. The tab fixing device according to claim 2, characterized in that: One end of the reinforcing portion away from the first positioning portion protrudes from an end surface of the main body portion that is away from the first positioning portion.

5. The tab fixing device according to claim 4, characterized in that: The protruding dimension of the reinforcement portion is between 0.1 mm and 0.3 mm.

6. The tab fixing device according to claim 2, characterized in that: The main body has an axisymmetric structure, and a first rounded corner section, a second rounded corner section, a third rounded corner section and a transition section are formed on both sides of the main body; One end of the first rounded section is connected to the pole lug bracket, and the other end is connected to one end of the second rounded section, the other end of the second rounded section is connected to one end of the third rounded section, and the other end of the third rounded section is connected to the transition section.

7. The tab fixing device according to claim 6, characterized in that: The fillet sizes of the first fillet segment, the second fillet segment and the third fillet segment are all between 3 mm and 8 mm, and the included angle a between the first fillet segment and the pole lug support is between 30° and 60°.

8. The tab fixing device according to claim 2, characterized in that: The thickness of the second positioning portion is smaller than the thickness of the tab support, and the thickness h of the second positioning portion and the thickness H of the tab support satisfy h=0.3H-0.6H.

9. The tab fixing device according to claim 2, characterized in that: The housing comprises a main shell, and at least one partition is provided in the main shell, and the partition divides the main shell into at least two accommodating chambers; The pole lug brackets are arranged in one-to-one correspondence with the accommodating cavities, and a plurality of third positioning portions extending along the second direction are formed on the partition, the first positioning portions on two adjacent pole lug brackets facing the partition evenly divide the third positioning portions on the partition, and the fasteners pass through the first positioning portions and are connected to the third positioning portions.

10. A battery, characterized in that: A battery cell and a tab fixing device as claimed in any one of claims 1 to 9; The battery cell is arranged in the shell, and the tab of the battery cell is connected to the tab bracket.

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