CN219937102U - Secondary battery and electric equipment - Google Patents

Abstract

The utility model provides a secondary battery and electric equipment, which comprises an elastic piece, wherein the elastic piece is pressed against a pole lug through a first elastic part and a second elastic part with elasticity so as to realize the relative fixation with the pole lug, thus the elastic piece and a body are not required to be additionally fixed, and the secondary battery and the electric equipment are beneficial to simplifying the structure, reducing the installation procedure and reducing the cost. In addition, in the tab bending scheme, the elastic member is mainly used for keeping the tab flat, and reducing short circuit conditions caused by bending, interpolation and the like. Therefore, the electrode lugs have better postures, so that the connection of the electrode lugs is more stable and safer, and the use stability of the electrode assembly and the electric equipment is better.

Description

Secondary battery and electric equipment

Technical Field

The utility model relates to the technical field of power electrode assemblies, in particular to a secondary battery and electric equipment.

Background

In the existing electrode assembly structure, there are mainly two tab forms. One is a folded tab, and the other is a bent tab. For the bent tab, the tab is easy to be misplaced in the bending process and after bending, and a containing area is formed in the tab, and part of the tab may be mutually contacted or extend into the body due to bending misplacement, so that the electrode assembly is short-circuited.

Disclosure of Invention

The utility model provides a secondary battery and electric equipment so as to improve the posture of a tab.

A first aspect of the present utility model provides a secondary battery including a motor assembly and an elastic member.

The electrode assembly comprises a body and a tab, wherein the tab is connected with the body, a first accommodating area is arranged along the height direction of the body, and the first accommodating area is provided with a first surface and a second surface which are opposite in the height direction.

The elastic piece is provided with a first elastic part and a second elastic part which are connected, at least part of the first elastic part is abutted to the first surface, at least part of the second elastic part is abutted to the second surface, the first surface and the second surface are arranged at intervals, and the first elastic part and the second elastic part are arranged in an insulating mode with the tab.

In some embodiments, the first resilient portion covers the first surface and the second resilient portion covers the second surface.

In some embodiments, the body has a width direction; the first elastic part is close to the body compared with the second elastic part, an extension section is arranged at the end part of the first elastic part, which is close to the body, the extension section exceeds the tab in the width direction, one end of the body, which is close to the tab, is provided with an end face, and the extension section is parallel to the end face.

In some embodiments, a side of the first elastic part facing the first surface is provided with a first contact plane, and the first contact plane is in fit with the first surface; the second elastic part is provided with a second contact plane towards one side of the second surface, and the second contact plane is attached to the second surface.

In some embodiments, the surface area of the first contact plane is greater than or equal to the surface area of the first surface; the second contact plane has a surface area greater than or equal to a surface area of the second surface.

In some embodiments, the first elastic portion and the second elastic portion are connected through a circular arc transition.

In some embodiments, the elastic member is made of plastic or rubber.

In some embodiments, the elastic member is an integrally formed structure.

In some embodiments, the first resilient portion has a thickness in the range of 0.11mm to 0.18mm; and/or the thickness of the second elastic part ranges from 0.11mm to 0.18mm.

A second aspect of the present utility model provides an electric device, which includes the secondary battery described above, and further includes a housing, on which a pole is disposed, the pole being connected to the tab.

The utility model has the following beneficial effects: the utility model provides a secondary battery and electric equipment, which comprises an elastic piece, wherein the elastic piece is pressed against a pole lug through a first elastic part and a second elastic part with elasticity so as to realize the relative fixation with the pole lug, thus the elastic piece and a body are not required to be additionally fixed, and the secondary battery and the electric equipment are beneficial to simplifying the structure, reducing the installation procedure and reducing the cost.

In the tab bending scheme, the elastic member is mainly used for keeping the tab flat, and reducing short circuit conditions caused by bending, interpolation and the like. Therefore, the electrode lugs have better postures, so that the connection of the electrode lugs is more stable and safer, and the use stability of the electrode assembly and the electric equipment is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view schematically showing a structure of a bent tab in a secondary battery;

fig. 2 exemplarily shows a side view of a bent tab in a secondary battery;

fig. 3 is a schematic view exemplarily showing a structure of an elastic member for a secondary battery;

FIG. 4 is a schematic view schematically showing the structure in which the elastic member shown in FIG. 3 is assembled to the body and the tab;

fig. 5 is a schematic diagram illustrating the cooperation between the elastic member and the tab in the state of fig. 4.

The main elements in the embodiment of the utility model are marked:

electrode assembly 10 body 100

First surface 111 of tab 110

Second surface 112 first accommodation region 113

End 114 elastic member 300

First contact plane 314 of first elastic portion 310

Second elastic portion 320 of extension 315

Second contact plane 324

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper", "lower", "left" and "right" are generally used to refer to the directions of the upper, lower, left and right sides of the device in actual use or operation, and are specifically shown in the drawings.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

The utility model provides a secondary battery and electric equipment, which are respectively described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

Referring to fig. 1, an embodiment of the present utility model provides a secondary battery, which includes an electrode assembly 10, the electrode assembly 10 including a body 100 and a tab 110, the tab 110 being connected to the body 100. The body 100 may be a winding core body formed by winding, a lamination body formed by lamination, or other types of bodies, and the example in this embodiment does not unduly limit the present utility model.

Here, in the embodiment of the present utility model, in order to facilitate description of the positional relationship between the respective members in the present utility model, the length direction X, the width direction Y, and the height direction Z of the body 100 are defined. Here, the tab 110 is exemplarily located at an end position of the body 100 in the height direction Z.

Here, the tab 110 is a bent tab 110, one end of the tab 110 is connected to the body 100, and the tab 110 includes a first portion, a second portion and a third portion connected in sequence, the first portion is close to the body 100 and extends along the width direction Y, the second portion extends along the vertical direction Z, and the third portion extends along the opposite direction of the width direction Y. Referring to fig. 2, the tab 110 having a bent shape forms a first accommodating area 113 in a height direction Z, and the first accommodating area 113 has a first surface 111 and a second surface 112 opposite to each other in the height direction Z, specifically, a first surface 111 is a surface of a first portion far from the body 100 and close to the first accommodating area 113, and a second surface 112 is a surface of a second portion close to the body 100 and the first accommodating area 113. Here, the tab 110 is used to connect with other components, such as welding directly or indirectly with a post (not shown) on the cap assembly, to achieve electrical communication of the body 100 with the other components.

Here, when the tab 110 is subjected to external force during and after bending, the tab 110 is likely to be damaged or dislocated, and a gap (i.e., the first receiving region 113 region) is formed between the first portion and the third portion of the tab 110, so that the tab 110 may be dislocated and may be erroneously brought into contact with each other, resulting in occurrence of a short circuit or the like. For example, the tab 110 may be inserted into the body 100 due to misalignment and cause a short circuit of the secondary battery.

In view of this, referring to fig. 3 and 4, in the embodiment of the present utility model, an elastic member 300 is further provided, and the elastic member 300 is used to abut against the first receiving area 113 (see fig. 2) to keep the tab 110 in a non-dislocated state, so that the tab 110 is not prone to be in contact with itself or other components due to dislocation, which is helpful for reducing occurrence of short circuit and the like.

Here, the elastic member 300 includes a first elastic portion 310 and a second elastic portion 320, and the first elastic portion 310 is closer to the body 100 than the second elastic portion 320. Referring to fig. 5, a part or all of the first elastic portion 310 is located in the first accommodating area 113, and a part or all of the second elastic portion 320 is located in the first accommodating area 113, and the first elastic portion 310 abuts against the first surface 111, and the second elastic portion 320 abuts against the second surface 112, so as to be relatively clamped in the first accommodating area 113 of the tab 110 in the height direction Z.

For example, with continued reference to fig. 5, the first elastic portion 310 has a first contact plane 314 on a side close to the first surface 111, and the first contact plane 314 is adhered to the first surface 111. Thus, the first surface 111 can be kept in a flat posture relatively better, that is, the first portion of the tab 110 is not easy to be dislocated or bent. Here, the first elastic portion 310 may be made to cover the first surface 111, that is, the surface area of the first contact plane 314 is greater than or equal to the first surface 111 in this example, and the first surface 111 may be entirely covered to achieve a preferable effect. Of course, in other embodiments, the first elastic portion 310 may cover only a portion of the first surface 111, that is, the surface area of the first contact plane 314 may be smaller than the first surface 111, and the present utility model is not limited thereto.

Similarly, the second elastic portion 320 has a second contact plane 324 on a side near the second surface 112, and the second contact plane 324 is in contact with the second surface 112. Thus, the second surface 112 can be kept in a flat posture relatively better, that is, the third portion of the tab 110 is not easy to be dislocated and bent. Here, the second elastic portion 320 may cover the second surface 112, that is, the surface area of the second contact plane 324 is greater than or equal to the second surface 112 in this example, and the second surface 112 may be completely covered to achieve a preferable effect. Of course, in other embodiments, the second elastic portion 320 may cover only a portion of the second surface 112, that is, the surface area of the second contact plane 324 may be smaller than the second surface 112, and the present embodiment is not limited in any way.

In addition, the elastic member 300 is disposed in the first receiving region 113, whereby the elastic member 300 forms a barrier between the first and third portions of the tab 110, thereby also helping to prevent the first and third portions of the tab 110 from contacting each other due to bending, misalignment, etc. Thus, the tab 110 is not easily bent or dislocated during bending of the tab 110 and subsequent use of the secondary battery.

Here, in the example of the above embodiment, the contact surface of the first elastic portion 310 and the tab 110 is a plane, and the contact surface of the second elastic portion 320 and the tab 110 is a plane, but it is understood that in other embodiments, the contact surface may not be a plane, for example, the first contact plane 314 and/or the second contact plane 324 may be replaced by a wavy surface, etc., which is not limited thereto.

Here, it can be seen that, in the embodiment of the utility model, for the electrode assembly 10 with the tab 110 bent, the elastic member 300 is abutted in the first accommodating area 113 of the tab 110, so that no additional welding or other connection methods are required to connect the elastic member 300 and the electrode assembly 10, and the arrangement and use of the elastic member 300 are very convenient.

Therefore, the elastic member 300 provided in the embodiment of the utility model not only reduces the situation that the tab 110 is in contact with itself or other components due to disorder, bending, etc., and improves the stability of the secondary battery, so that the safety performance of the secondary battery is improved, but also the connection of the elastic member 300 is simple and easy to implement, and no additional connection process such as welding is required, and no additional connection structure is required.

In some embodiments, referring to fig. 3 and 5, the first elastic portion 310 is provided with an extension 315 near an end of the body 100, and referring to fig. 4, an end of the body 100 near the tab 110 has an end face 114, and the extension 315 is parallel to the end face 114. The extension 315 extends beyond the tab 110 in the width direction Y, that is, the extension 315 extends beyond the first accommodating area 113 along the width direction Y. Here, when the extension 315 is not provided, the end of the first elastic portion 310 near the body 100 may be inserted into the body 100 due to stress or the like. However, by the arrangement of the extension 315, the elastic member 300 does not have an end portion facing the body 100 at a side close to the body 100, so that the insertion of the elastic member 300 into the body 100 can be reduced, and the damage to the body 100 is caused, which is helpful to improve the stability of the secondary battery, and the secondary battery is not easy to be damaged due to the stress of the internal components caused by the external force during the assembly and use process.

In some embodiments, the first elastic portion 310 and the second elastic portion 320 are connected in a circular arc manner, that is, the connection between the first elastic portion 310 and the second elastic portion 320 is circular arc, and in particular, the surface of the connection between the first elastic portion 310 and the second elastic portion 320 facing the tab 110 is a circular arc surface, so that insertion and damage to the tab 110 caused by having sharp corners at the connection can be prevented.

It can be appreciated that the first and second elastic parts 310 and 320 are provided to be insulated at a position contacting the tab 110 in order to prevent a situation, such as a short circuit, which affects the operation of the electrode assembly 10 due to the contact of the electrode assembly 10 with the elastic member 300. For example, in some examples, the elastic member 300 is made of plastic or rubber, such as PP, PET, PC, PVC, PA. Thereby, the insulation of the elastic member 300 is achieved while making the elastic member 300 elastic, so as not to cause the aforementioned short circuit or the like. Of course, in other embodiments, the elastic member 300 may be insulated at a portion where insulation is needed, for example, the elastic member 300 may be a metal spring, where the electrode assembly 10 contacts, for example, the tab 110 contacts, may be insulated by electroplating an insulating layer, or an insulating layer may be electroplated on the surface of the metal spring entirely.

Furthermore, in some embodiments, the elastic member 300 may be an integrally formed structure that will facilitate manufacturing. For example, when the elastic member 300 is made of plastic, the elastic member 300 may be integrally made by injection molding. Of course, in other embodiments, the elastic member 300 may be a split structure or an integral structure, and the present embodiment is not limited to this embodiment.

In some embodiments, the thickness of each of the first and second elastic portions 310, 320 ranges between 0.11mm-0.18mm. For example, the thickness of the first elastic portion 310 is 0.11mm, 0.12mm, 0.125mm, 0.127mm, 0.13mm, 0.145mm, 0.16mm, 0.163mm, 0.165mm, 0.17mm, or 0.18mm, etc., and ranges of any two of the above; the thickness of the second elastic portion 320 is 0.11mm, 0.12mm, 0.125mm, 0.127mm, 0.13mm, 0.145mm, 0.16mm, 0.163mm, 0.165mm, 0.17mm, or 0.18mm, and ranges of any two of the above; it is to be understood that the examples in the present embodiment do not all exemplify the relevant numerical examples; also, in some examples, the thicknesses of the first elastic portion 310 and the second elastic portion 320 are uniform, but in other examples, the thicknesses of the first elastic portion 310 and the second elastic portion 320 may be different, and the related examples in the embodiments of the present utility model do not unduly limit the present utility model.

Accordingly, in order to better achieve the technical effects of the present utility model, an embodiment of the present utility model further provides an electrical device, where the electrical device includes the aforementioned secondary battery, and the secondary battery further includes a housing (not shown), and a pole is disposed on the housing, and the pole is connected to the tab 110 to achieve electrical connection. For example, the tab may be connected to the tab 110 by a connection piece, and of course, the example in this embodiment does not constitute undue limitation.

Here, the secondary battery is used to supply power to electric devices, which may include electric automobiles, electric motorcycles, electric tools, motors, and the like. Of course, the examples in this embodiment do not unduly limit the present utility model.

It may be understood that the meaning of the terms in the embodiments of the present utility model is the same, and for some embodiments, details of implementation of the terms may refer to descriptions in other embodiments, and the exemplary descriptions and technical effects shown in the foregoing embodiments may be implemented correspondingly, so that the repeated parts will not be repeated.

The secondary battery and the electric equipment provided by the utility model are described in detail, and specific examples are applied to illustrate the principle and the implementation mode of the utility model, and the description of the examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. A secondary battery, characterized by comprising,

an electrode assembly (10), wherein the electrode assembly (10) comprises a body (100) and a tab (110), the tab (110) is connected with the body (100), the tab (110) is provided with a first accommodating area (113) along the height direction (Z) of the body (100), and the first accommodating area (113) is provided with a first surface (111) and a second surface (112) which are opposite in the height direction (Z);

an elastic member (300) having a first elastic portion (310) and a second elastic portion (320) connected to each other, at least a part of the first elastic portion (310) being in contact with the first surface (111), at least a part of the second elastic portion (320) being in contact with the second surface (112), the first surface (111) being spaced apart from the second surface (112); the first elastic part (310) and the second elastic part (320) are arranged in an insulating manner with the tab (110).

2. The secondary battery according to claim 1, wherein the first elastic portion (310) covers the first surface (111), and the second elastic portion (320) covers the second surface (112).

3. The secondary battery according to claim 1, wherein,

the body (100) has a width direction (Y);

the first elastic part (310) is close to the body (100) compared with the second elastic part (320), the first elastic part (310) is provided with an extension section (315) close to the end of the body (100), the extension section (315) exceeds the tab (110) in the width direction (Y), one end of the body (100) close to the tab (110) is provided with an end face (114), and the extension section (315) is parallel to the end face (114).

4. The secondary battery according to claim 1, wherein,

the side of the first elastic part (310) facing the first surface (111) is provided with a first contact plane (314), and the first contact plane (314) is attached to the first surface (111);

the second elastic part (320) is provided with a second contact plane (324) towards one side of the second surface (112), and the second contact plane (324) is attached to the second surface (112).

5. The secondary battery according to claim 4, wherein,

the surface area of the first contact plane (314) is greater than or equal to the surface area of the first surface (111);

the second contact plane (324) has a surface area greater than or equal to a surface area of the second surface (112).

6. The secondary battery according to claim 1, wherein the first elastic portion (310) and the second elastic portion (320) are connected by a circular arc transition therebetween.

7. The secondary battery according to claim 1, wherein the elastic member (300) is made of plastic or rubber.

8. The secondary battery according to claim 1, wherein the elastic member (300) is an integrally formed structure.

9. The secondary battery according to claim 1, wherein,

the thickness of the first elastic part (310) ranges from 0.11mm to 0.18mm; and/or the number of the groups of groups,

the thickness of the second elastic part (320) ranges from 0.11mm to 0.18mm.

10. The electrical consumer, comprising at least one secondary battery according to any one of claims 1-9, said secondary battery further comprising a housing, said housing having a pole disposed thereon, said pole being connected to said tab (110).