CN219106435U

CN219106435U - Connection structure, apron subassembly and battery

Info

Publication number: CN219106435U
Application number: CN202223372573.6U
Authority: CN
Inventors: 张可
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-05-30
Anticipated expiration: 2032-12-15

Abstract

The utility model discloses a connecting structure, a cover plate assembly and a battery, wherein the connecting structure comprises a connecting body, a lug connecting part and a clamping part, the connecting body is provided with a first end face and a second end face which form an included angle, the lug connecting part is arranged on the first end face in a bending way, the lug connecting part is arranged on the second end face, the connecting body is also provided with a third end face which is far away from a battery core, the clamping part is arranged on the third end face and is positioned at one end of the connecting body far away from the lug connecting part, the clamping part comprises a fixing part and a clamping body, one end of the fixing part is connected with the included angle of the connecting body, the other end of the fixing part is connected with the included angle of the clamping body, and a gap is formed between the clamping body and the connecting body and an opening for clamping by a clamp. According to the utility model, the clamping part can form a double-layer structure at the bottom end of the connecting body so as to improve the structural strength of the bottom end of the connecting body, and the connecting body can separate the battery cell from the clamping part so as to prevent the clamp from scratching the battery cell and prevent the battery cell from being damaged.

Description

Connection structure, apron subassembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a connecting structure, a cover plate assembly and a battery.

Background

The conventional lithium ion battery generally comprises a housing, a cover plate assembly and battery cells arranged in the housing, wherein in order to improve the energy density of the battery cells, a plurality of battery cells are often assembled to form a battery cell group according to use requirements in practice, so that a current collecting member is required to connect lugs of a plurality of battery cells in parallel, and then the battery cells are connected with pole posts on the cover plate assembly through the current collecting member.

After the current collecting member and the electrode lugs of the battery core are welded, the current collecting member is bent, so that the internal space of the shell occupied by the current collecting member is reduced, and the energy density of the lithium ion battery is improved. As disclosed in the prior art (chinese patent document CN108258180 a), a current collecting member includes a lead-out body and a connector provided to be bendable with respect to the lead-out body, the lead-out body being bent to form a holding structure. The fixing structure comprises a first fixing part and a second fixing part which are respectively arranged at two longitudinal ends of the internal connecting structure, a gap is arranged between the surfaces of the first fixing part and the second fixing part, which are close to the electrode assembly, and the surfaces of the internal connecting structure, which are close to the electrode assembly, and when the connecting body is bent, the clamp can extend into the gap to fix the first fixing part and the second fixing part, but the current collecting component of the structure has the following defects: in the process of clamping the fixing structure, the clamp is easy to scratch the battery cell, so that the battery cell is damaged; and the second holding portion is easily deformed when being bent.

Disclosure of Invention

One object of an embodiment of the utility model is to: the utility model provides a connection structure, it can reduce the risk that the electric core takes place to damage at the in-process of bending effectively, and structural strength is high moreover, non-deformable.

Another object of an embodiment of the utility model is to: provided is a cover plate assembly which can reduce the risk of damage to a battery cell, can improve the production yield of a battery, is not easy to deform, and is beneficial to assembly.

A further object of an embodiment of the utility model is that: the battery is simple in structure, high in production yield and good in performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in a first aspect, a connection structure is provided for connecting a battery core and a pole of a battery, the connection structure comprises a connection body, a pole lug connection part, a pole connection part and a clamping part, the connection body is provided with a first end face and a second end face which are included angles, the pole lug connection part is arranged on the first end face in a bendable manner, the pole lug connection part is arranged on the second end face, the connection body is further provided with a third end face which is away from the battery core, the third end face is respectively provided with an included angle with the first end face and the second end face, the clamping part is arranged on the third end face, the clamping part is located at one end of the third end face away from the pole connection part, the clamping part comprises a clamping body and a fixing part, one end of the fixing part is away from the pole connection part and is connected with the first end face in an included angle, the clamping body is connected with the second end face in a clearance, and an opening for inserting a clamp into the clearance is formed between the clamping body and the connection body.

As a preferable mode of the connection structure, the fixing portion is connected with the first end face, and the fixing portion is arranged at intervals with the tab connection portion.

As a preferable scheme of the connecting structure, the connecting body is provided with two opposite first end faces, each first end face is provided with one fixing portion, the clamping body comprises a first split body and a second split body, the first split body is connected with one fixing portion, and the second split body is connected with the other fixing portion.

As a preferable mode of the connection structure, the third end face of the connection body is provided with a reinforcing structure in a protruding mode.

As a preferable scheme of the connecting structure, the connecting body is provided with a crack-stopping groove, and at least part of the crack-stopping groove is positioned at the joint of the connecting body and the lug connecting part.

As a preferable scheme of the connecting structure, a material reducing hole is formed at the joint of the connecting body and the lug connecting part.

As a preferable scheme of the connecting structure, the connecting body and the pole connecting part are connected in an included angle.

In a second aspect, a cover plate assembly is provided, including a cover plate body, a pole disposed on the cover plate body, and the above connection structure, where the connection structure is connected with the pole through a pole connection portion.

As a preferred scheme of apron subassembly, still include first plastic spare, first plastic spare sets up the apron body with between the utmost point post connecting portion, utmost point post connecting portion with connection structure's connection body is the contained angle setting, first plastic spare deviates from the outward flange of apron body one side is provided with boss structure, connection body keep away from connection structure's clamping part's one end with boss structure's inner wall butt.

In a third aspect, a battery is provided, including having open casing, setting up electric core in the casing and above the apron subassembly, apron subassembly shutoff in the open of casing, the electric core includes the utmost point ear, the electric core be provided with the side of utmost point ear with the apron subassembly is the contained angle setting, the connection structure of apron subassembly pass through utmost point ear connecting portion with the utmost point ear of electric core is connected.

The beneficial effects of the utility model are as follows: the clamping part and the connecting body can jointly form a 'back-shaped' structure, so that one end of the connecting body, which is far away from the pole connecting part, forms a double-layer structure, which is beneficial to improving the structural strength of the connecting body, which is far away from one end of the pole connecting part, and reducing the deformation of the connecting body during bending; and clamping part sets up on the third terminal surface, and connecting body separates electric core and clamp, and one of them clamping jaw of anchor clamps can pass the opening and insert the clearance between clamping body and the connecting body to make anchor clamps can press from both sides on clamping body's inner wall and outer wall, thereby fixed clamping body, further reduce the deformation of connecting body when bending, can avoid anchor clamps to scratch electric core at the centre gripping in-process effectively simultaneously and cause electric core damage.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

Fig. 1 is a perspective view of a connection structure according to an embodiment of the present utility model.

Fig. 2 is a bottom view of the connecting structure according to the embodiment of the present utility model.

Fig. 3 is a perspective view of a cover plate assembly according to an embodiment of the present utility model.

In the figure:

1. a connection body; 11. a first end face; 12. a third end face; 2. a tab connection part; 3. a pole connection portion; 31. a post hole; 4. a clamping part; 41. a clamping body; 411. a first split; 412. a second split; 42. a fixing part; 5. a gap; 6. a reinforcing structure; 7. a crack stopper groove; 8. a material reducing hole; 9. a fusing hole;

100. a cover plate body; 200. a pole; 300. a connection structure; 400. a first plastic part; 401. a boss structure; 500. the second plastic piece; 600. and riveting the blocks.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments 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.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a connecting structure which is used for connecting a battery core and a pole of a battery. As shown in fig. 1 and 2, the connection structure includes a connection body 1, a tab connection portion 2, and a post connection portion 3, where the connection body 1 has a first end face 11 and a second end face that are included angles, the first end face 11 and the second end face do not face the battery core, the tab connection portion 2 is bendable and disposed on the first end face 11, and the post connection portion 3 is disposed on the second end face. The connection structure has first state and second state, and when connection structure is first state, the surface of utmost point ear connecting portion 2 is looks parallel and level with the surface of connecting body 1, and when connection structure is the second state, utmost point ear connecting portion 2 is bent for connecting body 1 to make and form certain contained angle between the surface of utmost point ear connecting portion 2 and the surface of connecting body 1.

The connection structure still includes clamping part 4, clamping part 4 sets up in the one side that the connection body 1 deviates from the electric core, clamping part 4 includes clamping body 41 and fixed part 42, connection body 1 has the third terminal surface 12 that deviates from the electric core, third terminal surface 12 is the contained angle setting with first terminal surface 11 and second terminal surface respectively, the one end of fixed part 42 is the contained angle with connection body 1 and is connected, the other end is connected with clamping body 41 contained angle to make clamping body 41 and connection body 1 between have clearance 5, and be formed with the opening of clearance 5 intercommunication between clamping body 41 and the connection body 1.

In this embodiment, one end of the connection body 1 far away from the pole connection portion 3 is the bottom end of the connection structure, when bending, the one end of the connection body 1 far away from the pole connection portion 3 is easier to deform, the clamping portion 4 and the connection body 1 can form an annular double-layer at the bottom end of the connection structure together, the double-layer structure can improve the structural strength of the bottom end of the connection body 1, and the deformation of the connection body 1 during bending is reduced; and one of them clamping jaw of anchor clamps can pass the opening and insert the clearance between centre gripping body 41 and the connection body 1 for the anchor clamps can press from both sides on the inner wall and the outer wall of centre gripping body 41, thereby the bottom of fixed connection body 1, with the deformation of reduction connection body when bending, clamping part 4 sets up on third terminal surface 12 simultaneously, and connection body 1 can separate electric core and clamping part 4, in order to avoid the anchor clamps to scratch the electric core and cause the electric core damage at the centre gripping in-process.

Specifically, the fixing portion 42 is connected to the first end face 11 of the connecting body 1 at an angle such that the clamping body 41 is opposite to and spaced from the third end face 12. The fixing portion 42 is disposed at an interval with the tab connection portion 2, that is, the clamping portion 4 and the tab connection portion 2 are disposed at an interval, and the clamping portion 4 does not interfere with bending of the tab connection portion 2.

Preferably, the clamping portion 4 and the connecting body 1 are integrally bent and formed to improve structural strength of the connecting structure.

Further, the connecting body 1 has two opposite first end surfaces 11, each first end surface 11 is provided with one fixing portion 42, the clamping body 41 includes a first split 411 and a second split 412, the first split 411 is connected with one of the fixing portions 42, and the first split 411 is connected with the other fixing portion 42. This design can set up first components of a whole that divides 411 and one of them fixed part 42 on one of them first terminal surface 11 of connecting body 1, and second components of a whole that divides 412 and another fixed part 42 set up on another first terminal surface 11 of connecting body 1, make first components of a whole that divides 411 and second components of a whole that divides 412 parallel and level and constitute clamping body 41 through bending.

The first split 411 and the second split 412 may be disposed at a distance, or opposite end surfaces of the first split 411 and the second split 412 may abut.

Further, the connection body 1 is further provided with a reinforcing structure 6. The reinforcing structure 6 can further improve the structural strength of the connection body 1.

In this embodiment, the reinforcing structure 6 is disposed in the middle area of the third end face 12, and the reinforcing structure 6 and the clamping portion 4 are disposed at intervals to enhance the structural strength of different areas of the connection body 1, and the reinforcing structure 6 protrudes toward one side of the connection body 1 away from the battery cell, so that the side of the connection body 1 facing the battery cell is kept flush.

The reinforcing structure 6 is exemplified by a cross-shaped reinforcing protrusion.

Specifically, a bending line is formed at the junction of the connection body 1 and the tab connection part 2.

Further, the connection body 1 is provided with a crack stopper groove 7, and at least part of the crack stopper groove 7 is located at the joint of the connection body 1 and the tab connection part 2. The crack-stopping groove 7 can reduce the stress of the lug connection part 2 and the connection body 1 during bending so as to prevent the connection body 1 from cracking.

Preferably, the width of the crack stop groove 7 is greater than 1.5 times the thickness of the connecting body 1.

Specifically, the junction of the connection body 1 and the tab connection part 2 is provided with a material reducing hole 8. The material reducing holes 8 can reduce the structural strength of the connection part of the connection body 1 and the tab connection part 2 so that the tab connection part 2 is bent.

Wherein, crack stopper groove 7 and subtract material hole 8 interval setting.

Preferably, a plurality of material reducing holes 8 are arranged at the joint of the connecting body 1 and the tab connecting part 2 at intervals, the material reducing holes 8 are waist-shaped holes, and the length direction of the material reducing holes 8 is the same as the length direction of the connecting body 1.

Specifically, the connection structure is provided with a fusing hole 9. In the use of the battery, the part of the connecting structure, which is positioned on the two opposite sides of the fusing hole 9 along the width direction, has high resistance, and when the temperature rise of the connecting structure is high, the part of the fusing hole 9, which is positioned on the two opposite sides along the width direction, can be fused first, so that the condition that the battery is out of control at high temperature is avoided, and the safety performance of the battery is improved.

Illustratively, a fuse hole 9 is provided in the pole connection 3.

Specifically, the connection body 1 and the pole connection portion 3 are connected at an included angle, so that the connection structure is an "L-shaped" structure. The connecting structure of the design can be used for a battery with an included angle between the plane where the pole is located and the plane where the electrode lug of the battery core is located, so that the space occupation ratio of the battery core is increased, and the energy density of the battery core is improved.

By way of example, the connection body 1 and the pole connection portion 3 are integrally bent and formed, which can help to further improve the overall strength of the connection structure.

As shown in fig. 1 to 3, the present utility model further provides a cover assembly, which includes a cover body 100, a pole 200 disposed on the cover body 100, and a connection structure 300 according to any of the above embodiments, wherein the connection structure 300 is connected to the pole 200 through a pole connection portion 3.

Specifically, the pole connection part 3 is provided with a pole hole 31, and one end of the pole 200 can be inserted into the pole hole 31 and welded with the wall of the pole hole 31.

Further, the cover plate assembly further comprises a first plastic part 400, a second plastic part 500 and a riveting block 600, the first plastic part 400 is installed between the cover plate body 100 and the pole connecting portion 3, the second plastic part 500 is arranged on one side, far away from the second plastic part 500, of the cover plate body 100, the riveting block 600 is arranged on one side, far away from the cover plate body 100, of the second plastic part 500, the first plastic part 400 is provided with a first through hole, the cover plate body 100 is provided with a second through hole, the second plastic part 500 is provided with a third through hole, the first through hole, the second through hole and the third through hole are sequentially communicated and form a hole group, and one end, far away from the pole connecting portion 3, of the pole 200 penetrates through the hole group and is riveted with the riveting block 600, so that the pole 200 is fixed on the cover plate body 100.

Specifically, the pole connecting portion 3 is disposed at an included angle with the connecting body 1 of the connecting structure 300, the outer edge of the side, away from the cover plate body 100, of the first plastic member 400 is provided with a boss structure 401, the pole connecting portion 3 is abutted against the side, away from the cover plate body 100, of the first plastic member 400, the connecting body 1 is bent towards the side, away from the first plastic member 400, of the connecting body 1, and one end, away from the clamping portion 4, of the connecting body 1 is abutted against the inner wall of the boss structure 401. When the tab connection part 2 is bent, the boss structure 401 can prop against the end of the connection body 1 away from the clamping part 4 to offset most of the deformation force of the end of the connection body 1 away from the clamping part 4, so as to reduce the deformation of the end of the connection body 1 away from the clamping part 4, and help to prevent the connection failure of the connection structure 300 and the pole 200.

The utility model also provides a battery, which comprises a shell with an opening, a battery cell arranged in the shell, and the cover plate component of any embodiment, wherein the cover plate component is plugged in the opening of the shell, and the connecting structure 300 of the cover plate component is connected with the electrode lug of the battery cell through the electrode lug connecting part 2. In the battery production process, the clamp can be prevented from damaging the battery core when the lug connection part 2 is bent, so that the production yield of the battery is improved, the connection structure 300 is not easy to deform, the connection structure 300 can be prevented from deforming too much to be installed in the shell, and the battery is facilitated to be assembled.

Specifically, the side that the electric core was provided with the utmost point ear is the contained angle setting with the apron subassembly, and the utmost point ear connecting portion 2 of connection structure 300 is the contained angle setting with utmost point post connecting portion 3, and utmost point ear connecting portion 2 is connected with the utmost point ear of electric core, and utmost point post connecting portion 3 is connected with the utmost point post 200 of apron subassembly.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The utility model provides a connection structure for connect electric core and utmost point post of battery, connection structure is including connecting body, utmost point ear connecting portion and utmost point post connecting portion, the connecting body has first terminal surface and the second terminal surface that is the contained angle, utmost point ear connecting portion can bend the ground and set up on the first terminal surface, utmost point post connecting portion set up on the second terminal surface, the connecting body still has the third terminal surface that deviates from electric core, the third terminal surface respectively with first terminal surface and second terminal surface are the contained angle setting, its characterized in that still includes the clamping part, the clamping part sets up on the third terminal surface, just the clamping part is located the third terminal surface is kept away from the one end of utmost point post connecting portion, the clamping part includes clamping body and fixed part, the one end of fixed part with the connecting body is the contained angle and is connected, the other end with the clamping body is the contained angle and is connected, the clearance has between the clamping body with be formed with between the clamping body and supply anchor clamps to insert to the opening in the clearance.

2. The connection structure according to claim 1, wherein the fixing portion is connected to the first end face, and the fixing portion is disposed at a distance from the tab connection portion.

3. The connecting structure according to claim 2, wherein the connecting body has two opposite first end faces, each of the first end faces is provided with one of the fixing portions, the holding body includes a first split body connected with one of the fixing portions and a second split body connected with the other of the fixing portions.

4. A connection according to any one of claims 1 to 3, wherein the third end face of the connection body is provided with a reinforcing structure in a protruding manner.

5. A connection according to any one of claims 1 to 3, wherein the connection body is provided with a crack stop groove, at least part of which is located at the junction of the connection body and the tab connection.

6. A connection structure according to any one of claims 1 to 3, wherein a material reducing hole is provided at a junction of the connection body and the tab connection portion.

7. A connection according to any one of claims 1 to 3, wherein the connection body and the post connection are connected at an angle.

8. A cover plate assembly comprising a cover plate body and a pole provided on the cover plate body, characterized by further comprising the connection structure of any one of claims 1 to 7, the connection structure being connected with the pole through a pole connection.

9. The cover plate assembly of claim 8, further comprising a first plastic piece, wherein the first plastic piece is installed between the cover plate body and the pole connection portion, the pole connection portion and the connection body of the connection structure are arranged in an included angle, the outer edge of one side, away from the cover plate body, of the first plastic piece is provided with a boss structure, and one end, away from the clamping portion of the connection structure, of the connection body is abutted against the inner wall of the boss structure.

10. The battery comprises a shell with an opening and a battery cell arranged in the shell, wherein the battery cell comprises a tab, and the battery cell is characterized by further comprising the cover plate assembly according to claim 8 or 9, wherein the opening of the shell is plugged by the cover plate assembly, the side surface of the battery cell, provided with the tab, is provided with the cover plate assembly to form an included angle, and the connecting structure of the cover plate assembly is connected with the tab of the battery cell through the tab connecting part.