CN216958258U - Battery cover assembly and lithium battery having the same - Google Patents

Abstract

The utility model provides a battery cover plate assembly, the battery cover plate assembly comprises: a cover plate assembly, the cover plate assembly is provided with a first installation hole and a second installation hole, the first installation hole is provided with a negative electrode assembly, the second A positive electrode assembly is provided at the installation hole, wherein the shape of the cross section of the pole of the negative electrode assembly is different from the shape of the cross section of the pole of the positive electrode assembly. The technical solution of the present application effectively solves the problem that the battery cover plate assembly in the prior art is easy to distinguish between positive and negative batteries when the top patch is attached.

Description

Battery cover plate assembly and lithium battery having the same

technical field

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

Background technique

At present, as the power battery of vehicles, lithium batteries have become the development trend of electric vehicles. The battery cover plate assembly is an important part of the power battery, and its positive and negative poles are symmetrically arranged on both sides of the cover plate. Therefore, in the process of battery processing, it is first necessary to distinguish the polarity of the battery and then attach the top patch. There are positive and negative signs on the top patch. If during the battery processing, the battery polarity is wrongly distinguished and the top patch is wrongly attached, it is very likely to cause battery safety risks.

In order to solve the problem that the battery cover plate assembly in the prior art is easy to distinguish between positive and negative batteries when attaching the top patch. No effective solution has been proposed yet.

Utility model content

The main purpose of the present invention is to provide a battery cover plate assembly and a lithium battery having the same, so as to solve the problem that the battery cover plate assembly in the prior art is easy to distinguish between positive and negative batteries when attaching a top patch.

In order to achieve the above purpose, according to an aspect of the present invention, a battery cover plate assembly is provided, comprising: a cover plate assembly, the cover plate assembly is provided with a first installation hole and a second installation hole, and the first installation hole is provided with There is a negative electrode assembly, and a positive electrode assembly is disposed at the second installation hole, wherein the shape of the cross section of the pole of the negative electrode assembly is different from the shape of the cross section of the pole column of the positive electrode assembly.

Further, the cross section of the pole of the negative electrode assembly is circular, semicircular, polygonal or elliptical.

Further, the cross-section of the pole of the positive electrode assembly is circular, semicircular, polygonal or elliptical.

Further, the hole-like structures of the first mounting hole and the second mounting hole are set differently.

Further, the negative electrode assembly includes: a circular spacer, which is connected to the cover plate assembly and is located at the first installation hole; a circular sealing ring, which is arranged in the circular spacer; a negative pole, a negative electrode The first end of the column is in contact with the circular sealing ring, and the second end of the negative column is arranged away from the cover plate assembly; the plastic on the negative column is arranged along the circumference of the second end of the negative column.

Further, the plastic on the negative pole is in contact with the cover plate assembly, and at least part of the circular spacer extends into the plastic on the negative pole.

Further, the positive electrode assembly includes: a square spacer, the square spacer is connected to the cover plate assembly and located at the second installation hole; a square seal ring, the square seal ring is arranged in the square spacer; a positive pole, the first end of the positive pole Abutting with the square sealing ring, the second end of the positive pole is arranged on the side away from the cover plate assembly; the plastic on the positive pole is arranged along the circumference of the second end of the positive pole.

Further, the plastic on the positive pole is in contact with the cover plate assembly, and at least part of the square spacer extends into the plastic on the positive pole.

Further, the cover plate assembly includes a substrate, a top patch and a lower plastic, the substrate is located between the top patch and the lower plastic, and the substrate, the top patch and the lower plastic are all provided with a first mounting hole and a second mounting hole.

According to another aspect of the present invention, a lithium battery is provided, which includes a battery cover plate assembly, and the battery cover plate assembly is the above-mentioned battery cover plate assembly.

Applying the technical solution of the present invention, the cover plate assembly is provided with a first installation hole and a second installation hole, the first installation hole is provided with a negative electrode assembly, the second installation hole is provided with a positive electrode assembly, and the pole of the negative electrode assembly is installed. The shape of the cross section of the column is different from the shape of the cross section of the pole column of the positive electrode assembly, which is convenient to distinguish the negative electrode assembly and the positive electrode assembly, and avoids the risk of battery use caused by the wrong distinction between the negative electrode assembly and the positive electrode assembly. The technical solution of the present application effectively solves the problem that the battery cover plate assembly in the prior art is easy to distinguish between positive and negative batteries when the top patch is attached.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 shows a schematic structural diagram of a battery cover plate assembly in the prior art;

FIG. 2 shows a schematic structural diagram of the first embodiment of the battery cover plate assembly according to the present invention;

3 shows a schematic structural diagram of a second embodiment of the battery cover plate assembly according to the present invention;

4 shows a schematic structural diagram of a third embodiment of the battery cover plate assembly according to the present invention;

Fig. 5 shows the enlarged schematic view of the structure at I in Fig. 4;

FIG. 6 shows an enlarged schematic view of the structure at II in FIG. 4 .

Wherein, the above-mentioned drawings include the following reference signs:

10. Cover plate assembly; 11. First mounting hole; 12. Second mounting hole;

20. Negative electrode assembly; 21. Circular spacer; 22. Circular sealing ring; 23. Negative pole; 24. Plastic on the negative pole;

30. Positive electrode assembly; 31. Square spacer; 32. Square sealing ring; 33. Positive pole; 34. Plastic on positive pole;

101, the substrate; 102, the top patch; 103, the lower plastic.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those of ordinary skill in the art, and in the accompanying drawings, which may be exaggerated for the sake of clarity The thicknesses of layers and regions are described, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

1 to 6 , according to a specific embodiment of the present application, a battery cover plate assembly is provided.

A battery cover plate assembly includes a cover plate assembly 10 . The cover plate assembly 10 is provided with a first mounting hole 11 and a second mounting hole 12 , the first mounting hole 11 is provided with a negative electrode assembly 20 , and the second mounting hole 12 is provided with a positive electrode assembly 30 . The shape of the cross section of the column is different from the shape of the cross section of the pole of the positive electrode assembly 30 .

Applying the technical solution of the present invention, the cover plate assembly 10 is provided with a first mounting hole 11 and a second mounting hole 12 , the first mounting hole 11 is provided with a negative electrode assembly 20 , and the second mounting hole 12 is provided with a positive electrode assembly 30 , and the shape of the cross-section of the pole of the negative electrode assembly 20 is set to be different from the shape of the cross-section of the pole of the positive electrode assembly 30, so as to facilitate the distinction between the negative electrode assembly 20 and the positive electrode assembly 30, and avoid errors due to the difference between the negative electrode assembly 20 and the positive electrode assembly 30. The resulting battery use risks. The technical solution of the present application effectively solves the problem that the battery cover plate assembly in the prior art is easy to distinguish between positive and negative batteries when the top patch is attached.

Further, the cross section of the pole of the negative electrode assembly 20 is circular, semicircular, polygonal or elliptical.

Specifically, the cross section of the pole of the positive electrode assembly 30 is circular, semicircular, polygonal or elliptical.

Optionally, the hole-like structures of the first mounting hole 11 and the second mounting hole 12 are set differently. This arrangement enables the first mounting hole 11 and the second mounting hole 12 to fit the corresponding poles respectively, and has the technical effect of facilitating the distinction of the poles.

The negative electrode assembly 20 includes a circular spacer 21 , a circular sealing ring 22 , a negative electrode column 23 , and a plastic 24 on the negative electrode column. The circular spacer 21 is connected to the cover plate assembly 10 and is located at the first mounting hole 11 . The circular sealing ring 22 is arranged in the circular spacer 21 . The first end of the negative pole 23 is in contact with the circular sealing ring 22 . The second end of the negative pole 23 is disposed away from the side of the cover plate assembly 10 . The plastic 24 on the negative pole is arranged along the circumference of the second end of the negative pole 23 . This arrangement enables good connection stability between the various components of the negative electrode assembly 20 , and each component is adapted to the shape of the negative electrode column 23 .

Further, the plastic 24 on the negative pole is in contact with the cover plate assembly 10 , and at least part of the circular spacer 21 extends into the plastic 24 on the negative pole. This arrangement can protect the negative pole 23 .

The positive electrode assembly 30 includes a square spacer 31 , a square sealing ring 32 , a positive pole 33 , and a plastic 34 on the positive pole. The square spacer 31 is connected to the cover plate assembly 10 and is located at the second mounting hole 12 . The square sealing ring 32 is arranged in the square spacer 31 . The first end of the positive pole 33 is in contact with the square sealing ring 32 , and the second end of the positive pole 33 is disposed away from the cover plate assembly 10 side. The plastic 34 on the positive pole is disposed along the circumference of the second end of the positive pole 33 . In this way, various components of the positive electrode assembly 30 have good connection stability, and each component is adapted to the shape of the positive electrode column 33 .

The plastic 34 on the positive pole is in contact with the cover plate assembly 10 , and at least part of the square spacer 31 extends into the plastic 34 on the positive pole. This arrangement can protect the positive pole 33 .

In an exemplary embodiment, the negative electrode assembly 20 can also be set in a square shape, and the positive electrode assembly 30 can be set in a circular shape.

The cover plate assembly 10 includes a substrate 101, a top patch 102 and a lower plastic 103. The substrate 101 is located between the top patch 102 and the lower plastic 103. The substrate 101, the top patch 102 and the lower plastic 103 are all provided with first mounting holes. 11 and the second mounting hole 12.

According to another specific embodiment of the present application, a lithium battery is provided, which includes a battery cover plate assembly, and the battery cover plate assembly is the battery cover plate assembly in the above embodiment.

By adopting the technical solution of the present application and adopting the cover plate structure of the poles of different shapes, the production efficiency of the battery and the product molding yield are improved. The distribution of the poles of the existing cover plate is symmetrical and the structure is the same. During the processing and production of the battery, it is easy to cause errors in the positions of the positive and negative poles. If this situation can be avoided during the processing and production process, it can be effectively reduced. The related safety hazards of subsequent batteries.

The shapes of the positive and negative components of the battery concept provided in this application are different, and the positive and negative poles are distinguished, so that the battery cover has a foolproof function, which effectively avoids the assembly error between the top patch and the pole, and ensures the follow-up module. The accuracy of the positive and negative electrodes of the cell during production. The technical solution of the present application solves the following technical problems: first, the symmetrical structure of the positive and negative poles of the battery makes it necessary to distinguish the polarity of the battery before attaching the top patch, which affects the production efficiency of the battery; second, the positive and negative poles of the battery are symmetrical The unique structure makes the top patch processing easy to be reversed, and the battery has a potential safety hazard; third, the existing top patch does not have a foolproof effect.

As shown in FIG. 2 , after the substrate 101 is processed and formed, two through holes with different shapes are formed. During the assembly process, due to the different through hole forms, the aluminum spacers (circular spacers 21 , The form of the square spacer 31) also adopts different shapes, and the forms of the positive and negative poles are also different, so there will be no reverse installation of the positive and negative poles during the assembly process. , the use of different forms of upper plastic is convenient for the subsequent distinction of positive and negative electrodes and for the sticking of the top patch 102 to prevent fools.

In the production process of the existing battery, the symmetrical pole structure on both sides will cause the two sides of the vacant part of the top patch 102 to be consistent. Although the shape of the top patch is asymmetric due to the existence of the injection hole, the injection hole is substantially parallel to the upper layer of the cover plate. In the case where the top patch 102 is affixed upside down, the positive and negative electrodes of the battery cannot be distinguished through the liquid injection hole. If the top patch is pasted incorrectly, the polarity of the battery will be reversed, and the subsequent testing and application will lead to risks such as battery failure, which has a great potential safety hazard. And when this process is manually processed (pasting the top patch 102), it takes time to avoid pasting errors, distinguish the polarity of the battery, and affect the production efficiency of the battery.

In an optional embodiment, the symmetrical structure of the battery poles is disrupted, and a circular pole is used on the positive side, and a square pole is used on the negative side. In terms of battery processing, the only way to paste the top patch 102 is determined by this structure, and there is no need to pay attention to the polarity of the battery before production and processing. The top patch 102 has a foolproof function, and the battery application will no longer cause The safety problem caused by the opposite polarity of the top patch greatly improves the yield and safety factor of battery production. With this structure, the space left by the top patch 102 at the pole position should be composed of a square and a circle. If the positive and negative polarities are mixed up in the subsequent processing, the top patch with the circular vacancy cannot fit the square. Therefore, the error of this work is avoided, and the excellent rate of this process is greatly improved.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or Features are included in at least one embodiment generally described in this application. The appearances of the same expression in various places in the specification are not necessarily all referring to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any one embodiment, it is claimed that implementing such feature, structure or characteristic in conjunction with other embodiments is also within the scope of the present invention.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A battery cover plate assembly, characterized in that, comprising: A cover plate assembly (10), the cover plate assembly (10) is provided with a first mounting hole (11) and a second mounting hole (12), the first mounting hole (11) is provided with a negative electrode assembly (20) ), a positive electrode assembly (30) is provided at the second mounting hole (12), wherein the shape of the cross-section of the pole of the negative electrode assembly (20) is the same as the cross-sectional shape of the pole of the positive electrode assembly (30). The shape of the cross section is set differently. 2 . The battery cover plate assembly according to claim 1 , wherein the cross section of the pole post of the negative electrode assembly ( 20 ) is circular, semicircular, polygonal or oval. 3 . 3. The battery cover plate assembly according to claim 1, wherein the cross section of the pole post of the positive electrode assembly (30) is circular, semicircular, polygonal or elliptical. 4 . The battery cover plate assembly according to claim 1 , wherein the hole-like structures of the first mounting hole ( 11 ) and the second mounting hole ( 12 ) are provided differently. 5 . 5. The battery cover plate assembly according to claim 1, wherein the negative electrode assembly (20) comprises: a circular spacer (21), the circular spacer (21) is connected to the cover plate assembly (10) and is located at the first installation hole (11); a circular sealing ring (22), wherein the circular sealing ring (22) is arranged in the circular spacer (21); A negative pole (23), the first end of the negative pole (23) is in contact with the circular sealing ring (22), and the second end of the negative pole (23) is away from the cover plate assembly (10) one side setting; The plastic (24) on the negative pole is arranged along the circumference of the second end of the negative pole (23). 6. The battery cover plate assembly according to claim 5, wherein the plastic (24) on the negative pole is in contact with the cover plate assembly (10), and at least part of the circular spacer (21) is in contact with the cover plate assembly (10). ) extends into the plastic (24) on the negative pole. 7. The battery cover plate assembly according to claim 1, wherein the positive electrode assembly (30) comprises: a square spacer (31), the square spacer (31) is connected to the cover plate assembly (10) and is located at the second installation hole (12); a square sealing ring (32), the square sealing ring (32) is arranged in the square spacer (31); A positive pole (33), the first end of the positive pole (33) is in contact with the square sealing ring (32), and the second end of the positive pole (33) is away from the cover plate assembly (10) side setting; The plastic (34) on the positive pole is arranged along the circumference of the second end of the positive pole (33). 8. The battery cover plate assembly according to claim 7, wherein the plastic (34) on the positive pole is in contact with the cover plate assembly (10), and at least part of the square spacer (31) is in contact with the cover plate assembly (10). extending into the plastic (34) on the positive pole. 9. The battery cover plate assembly according to claim 1, wherein the cover plate assembly (10) comprises a substrate (101), a top patch (102) and a lower plastic (103), the substrate (101) ) is located between the top patch (102) and the lower plastic (103), and the substrate (101), the top patch (102) and the lower plastic (103) are all provided with the first mounting holes (11) and the second mounting hole (12). 10 . A lithium battery, comprising a battery cover plate assembly, wherein the battery cover plate assembly is the battery cover plate assembly according to any one of claims 1 to 9 .

Images