CN212062478U - Battery cover plate assembly and battery cell - Google Patents

Abstract

The application provides a battery cover plate subassembly and battery electricity core, battery cover plate subassembly includes: the device comprises a cover plate, cover plate plastic, pole block plastic, a pole column, a pole block and a sealing ring; the cover plate, the cover plate plastic, the pole block plastic and the pole block are respectively provided with a pole column hole, and the pole column is provided with a pole column guide groove; the pole sequentially penetrates through the pole column hole of the cover plate plastic, the pole column hole of the cover plate, the sealing ring, the pole column hole of the pole block plastic and the pole column hole of the pole block to be connected with the pole block; the sealing washer inlay in the utmost point piece plastic and apron and with apron plastic contact. This application has reduced the apron plastic and to electric core inner space's occupation through optimizing the apron structure, has greatly improved the inside space utilization of electric core, promotes the energy density of electric core.

Description

Battery cover plate assembly and battery cell

Technical Field

The application relates to the technical field of lithium ion batteries, in particular to a battery cover plate assembly and a battery cell using the same.

Background

In recent years, with policy support and guidance, the market share of new energy automobiles is gradually increased, and the discussion on replacing fuel oil vehicles by new energy automobiles is increased. In the heart of current consumers, the biggest defect of a new energy automobile compared with a traditional fuel oil automobile is the endurance mileage problem, the endurance mileage is too short, the consumption experience of the consumers is directly influenced, and how to improve the endurance mileage of the new energy automobile becomes an important problem in the current power battery industry.

The energy density of the battery needs to be improved in order to improve the endurance mileage of the new energy automobile, and two ideas mainly exist in the direction of improving the energy density of the battery at present, wherein the first idea is to improve the energy density of the battery by breaking through a battery chemical system and adopting a formula with higher energy density; secondly, through optimizing the battery structure, namely increasing the effective volume of the battery, more effective active substances are added, and further the energy density of the battery is improved.

Most of top cap designs adopt integrative the moulding plastics or the riveting form in the trade at present, occupy too much space on electric core inside high space, lead to electric core internal space utilization can't further promote, simultaneously because the design demand of post, also lead to the unable further reduction of its weight, influence electric core energy density's further promotion to electric core. In addition, the processing modes of the two top covers are too complex, and the cost is higher in the processing and manufacturing process.

SUMMERY OF THE UTILITY MODEL

What this application will solve is that the top cap occupies too much space and leads to the technical problem of inner space utilization reduction on electric core inside high space among the current lithium ion battery top structural design.

In order to solve the above technical problem, the present application discloses a battery cover plate assembly, includes: the device comprises a cover plate, cover plate plastic, pole block plastic, a pole column, a pole block and a sealing ring; the cover plate, the cover plate plastic, the pole block plastic and the pole block are respectively provided with a pole column hole, and the pole column is provided with a pole column guide groove; the pole sequentially penetrates through the pole column hole of the cover plate plastic, the pole column hole of the cover plate, the sealing ring, the pole column hole of the pole block plastic and the pole column hole of the pole block to be connected with the pole block; the sealing washer inlay in the utmost point piece plastic and apron and with apron plastic contact.

Optionally, the post comprises a post end plate and a post boss arranged on the post end plate, and the post boss is provided with a post platform; the pole boss sequentially penetrates through the pole hole of the cover plate plastic, the pole hole of the cover plate, the sealing ring, the pole hole of the pole block plastic and the pole hole of the pole block; the edge of the pole platform is welded with the inner edge of the pole hole of the pole block; the pole terminal plate is embedded into the cover plate plastic.

Optionally, the number of the pole blocks is two, and the two pole blocks are respectively a positive pole block and a negative pole block; two pole block plastics are respectively a positive pole block plastic and a negative pole block plastic; the number of the polar columns is two, namely a positive polar column and a negative polar column.

Optionally, the negative electrode block has a composite layer structure.

Optionally, the cover plate plastic is provided with a hollow hole and a plastic groove.

Optionally, the pole platform is welded to a connecting sheet penetrating through the pole guide groove, and the connecting sheet is connected to a pole lug on the battery roll core.

The application also discloses a battery electric core, include: the winding core is arranged in the shell and provided with a pole lug; further comprising: the battery cover plate assembly comprises a connecting sheet connected with a lug on the winding core and the battery cover plate assembly, wherein a cover plate plastic and a pole of the battery cover plate assembly are matched with the end face, provided with the lug, of the winding core, and the connecting sheet penetrates into the pole guide groove.

Optionally, the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered by the connecting sheet penetrate into the terminal guide groove.

Compared with the prior art, the technical scheme of the application has at least the following beneficial effects:

optimize the battery cover plate structure, through the effective connection of the combination realization utmost point post of apron, apron plastic and utmost point piece, reduced the apron plastic from this and to electric core inner space's occupation, greatly improved the inside space utilization of electric core, promoted the energy density of electric core.

Because the height of the winding core can be higher, the connection distance between the winding core and the pole column and between the winding core and the pole block is reduced, and the physical internal resistance of the battery cell is greatly reduced. In addition, the original tabs and connecting pieces inside the battery cell are all integrated inside the cover plate pole column and the pole block, so that the heat productivity of the battery cell in the circulation and multiplying power discharging process is improved, and the service life and the performance of the battery cell are further improved.

Through the application to this application battery cover plate subassembly scheme, need not to adopt riveting technology or the integrative technology of moulding plastics in the current top cap course of working, reduce the processing complexity of top cap from this, promote the yields to and reduce top cap processing cost.

Through the application to this application battery cover plate subassembly scheme, utmost point ear and connection piece can pass from the guide slot in the middle of the utmost point post, and utmost point post penetrates the trompil in the middle of the utmost point piece, consequently can change the equipment mode that original electric core utmost point ear piled up for electric core utmost point ear is vertical to pass the top cap, has reduced the occupation of utmost point ear in battery inner space from this, promotes the space utilization efficiency on the battery direction of height, further promotes the energy density of electric core.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 and 2 are schematic perspective views of assembled battery cover plate assemblies according to embodiments of the present disclosure;

fig. 3 is an exploded schematic view of a battery cover plate assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a pole of a battery cover plate assembly according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a positive electrode block of the battery cover plate assembly according to the embodiment of the present application;

fig. 6 is a schematic structural diagram of a negative electrode block of the battery cover plate assembly according to the embodiment of the present application;

fig. 7 is a schematic plan view of a battery cover plate assembly according to an embodiment of the present disclosure at different viewing angles;

FIG. 8 is a cross-sectional view of the D-D surface of the battery cover plate assembly shown in FIG. 7 and an enlarged structural schematic diagram thereof;

fig. 9 is a cross-sectional view of the E-E surface of the battery cover plate assembly shown in fig. 7 and an enlarged structural schematic diagram thereof.

The following is a supplementary description of the drawings:

1-a battery cover plate assembly;

2-cover plate; 20-pole hole;

3-cover plate plastic; 30-pole column hole; 31-hollowed out holes; 32-plastic grooves;

4-pole block plastic; 40-pole pore; 41-positive pole block plastic; 42-negative electrode block plastic;

5-pole column; 50-pole guide groove; 51-positive pole column; 52-negative pole post; 53-pole end plate; 54-pole boss; 55-pole platform;

6-pole piece; 60-pole hole; 61-positive pole block; 62-negative pole block; 62 a-composite layer one; 62 b-composite layer two;

7-sealing ring; 81. 82-laser welding position.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

For solving the technical problem that the insulating plastic occupies too much casing inner space among the relevant prior art, this application technical scheme provides a battery cover plate assembly, through the combination realization utmost point post of apron, apron plastic and terminal plastic be connected effectively with the terminal to this optimizes the battery cover plate structure, reduces and laps the inside plastic of apron and to the electric core on the high space of electricity core inside, reaches the purpose that the maximize utilized electric core space.

The present application is described in detail below with reference to an embodiment and the accompanying drawings, where the embodiment of the present application takes a square aluminum-casing battery with positive and negative pole blocks as an example, and those skilled in the art can understand that, in practical application, the present application can also be applied to a cell assembly scheme of a single pole block or a multi-pole block (more than two blocks) as required.

Please refer to fig. 1 to fig. 3 in combination, wherein fig. 1 and fig. 2 show a three-dimensional structure of a battery cover plate assembly according to an embodiment of the present disclosure after assembly; fig. 3 shows an exploded structure of a battery cover plate assembly according to an embodiment of the present disclosure.

As shown in the drawings, the battery cover plate assembly 1 of the present embodiment includes: the structure comprises a cover plate 2, cover plate plastic 3, pole block plastic 4, a pole 5, a pole block 6 and a sealing ring 7; wherein, the cover plate 2, the cover plate plastic 3, the pole block plastic 4 and the pole block 6 are respectively provided with pole column holes, such as pole column hole 20 in the cover plate 2, pole column hole 30 in the cover plate plastic 3, pole column hole 40 in the pole block plastics 41 and 42, and pole column hole 60 in the pole blocks 61 and 62; the poles 51, 52 have pole guide grooves 50. The pole 5 sequentially passes through the pole hole 30 of the cover plate plastic 3, the pole hole 20 of the cover plate 2, the seal ring 7, the pole hole 40 of the pole block plastic 4 and the pole hole 60 of the pole block 6 to be connected with the pole block 6. The pole 5 is provided with a pole guide slot 50 for a connecting sheet to penetrate through, and the connecting sheet is connected with a pole lug on the roll core. Utmost point post hole 30 of apron plastic 3, utmost point post hole 20 of apron 2, utmost point post hole 40 of utmost point piece plastic 4, utmost point post hole 60 of utmost point piece 6 provide effectual assembly space for utmost point post 5, improve the assembly precision simultaneously.

Based on the design requirement for the polarity of the battery cell, there are two pole blocks 6 in this embodiment, namely a positive pole block 61 and a negative pole block 62; correspondingly, there are two electrode block plastics 4, namely an anode block plastic 41 and a cathode block plastic 42; there are also two poles 5, namely a positive pole 51 and a negative pole 52. The two pole blocks 61 and 62 are basically the same in shape and structure, the two pole block plastics 41 and 42 are the same in shape and structure, and the two poles 51 and 52 are the same in shape and structure, so the same reference numerals are used for the same structures in the drawings.

Fig. 4 shows the structure of the pole of the battery cover plate assembly according to the embodiment of the present application, which is a three-dimensional structure, an upward view structure, a forward view structure, a sectional structure of a plane a-a thereof, and an upward view structure sequentially from top to bottom. The pole 5 may comprise a pole end plate 53 and a pole boss 54 provided on the pole end plate 53, the pole boss 54 having a pole platform 55. The function of the post boss 54 is to facilitate the welding of the edge of the post platform 55 and the inner edge of the post hole 60 of the post block 61, 62, and the post end plate 53 can be embedded in the cover plate plastic 3.

Referring to fig. 3 and 4, the post boss 54 of the post end plate 53 of the post 5 sequentially passes through the post hole 30 of the cover plate plastic 3, the post hole 20 of the cover plate 2, the seal ring 7, the post holes 40 of the post block plastics 41 and 42, and the post holes 60 of the post blocks 61 and 62, so as to be connected with the post block 6. Utmost point post guide slot 50 is seted up in the centre of utmost point post platform 55, runs through utmost point post end plate 53 and utmost point post boss 54 to satisfy the assembly demand of electric core, provide the assembly passageway for the connection piece on rolling up the core. The post platform 55 may be welded to a tab that passes through the post channel 50, which connects the tabs on the battery roll core.

Sealing washer 7 inlays in utmost point piece plastic 4 and apron 2 and with the contact of apron plastic 3, apron plastic 3 can support and compress sealing washer 7 after the assembly for it keeps effectual sealed to keep between utmost point post 5 and apron 2 and the apron plastic 3. The sealing ring 7 is an elastic sealing element, the material of the sealing ring can be high-temperature-resistant and corrosion-resistant materials such as rubber, fluororubber, ethylene propylene diene monomer and the like, and the effective sealing compression amount can be 15% -60%.

Referring to fig. 3, the cover plate plastic 3 and the cover plate 2, and the cover plate 2 and the pole block plastics 41 and 42 of the present embodiment may be tightly attached in sequence, and the cover plate 2 serves as a load-bearing cover plate assembly. The cover plate plastic 3 and the pole 5 can be provided with a groove on the surface for accommodating the pole end plate 53 to reduce the space occupation inside the battery cell.

The positive electrode block plastic 41 and the negative electrode block plastic 42 are groove structures, the positive electrode block 61 can be arranged in the positive electrode block plastic 41, the negative electrode block 62 can be arranged in the negative electrode block plastic 42, and the positive electrode block plastic 41 and the negative electrode block plastic 42 can surround the positive electrode block 61 and the negative electrode block 62 to play a role in protection.

Optionally, as shown in fig. 2, a plurality of hollow holes 31 and plastic grooves 32 may be further disposed on a surface of the cover plate plastic 3, which is matched with the battery roll core, in this embodiment, the hollow holes 31 may reduce the weight of the plastic, and may also prevent electrolyte from remaining inside the plastic; the plastic groove 32 can reserve more spaces for the winding core electrode lug in the assembling process and after assembly, so that the excessive extrusion of the electrode lug is avoided, and the purpose of reducing the safety risk is achieved. The cover plastic 3 is an insulating material, such as PP, PPs, etc.

Furthermore, the two pole blocks, the two pole block plastics and the two poles of the embodiment have basically no difference in size, and the main difference is in material. Specifically, the positive electrode block plastic 41 may be made of a conductive material, and the negative electrode block plastic 42 may be made of an insulating material; the positive post 51 is made of the same material as the positive tab, the negative post 52 is made of the same material as the negative tab, the positive block 61 may be made of a single conductive material (e.g., aluminum), and the negative block 62 may be made of a composite conductive material (e.g., copper and aluminum).

Fig. 5 shows the structure of the positive electrode block 61 of the battery cover plate assembly according to the embodiment of the present application, which includes a three-dimensional structure, a top view structure, a front view structure, a sectional structure of B-B plane thereof, and a bottom view structure. The middle of the positive pole block 61 is provided with a pole hole 60 which can be welded with the pole platform 55 of the corresponding positive pole 51, and the inner edge of the pole hole 60 of the positive pole block 61 is connected with the edge of the pole platform 55 of the positive pole 51 by laser welding.

Fig. 6 shows the structure of the negative electrode block 62 of the battery cover plate assembly according to the embodiment of the present application, which is a three-dimensional structure, a top view structure, a front view structure, a C-C cross-sectional structure thereof, and a bottom view structure sequentially from top to bottom. The negative electrode block 62 has a double-layer composite structure, including a first composite layer 62a and a second composite layer 62b, wherein the first composite layer 62a is preferably made of aluminum, and the second composite layer 62b is preferably made of copper. The middle of the negative pole block 62 is provided with a pole hole 60 which can be welded with the pole platform 55 of the corresponding negative pole 52, and the inner edge of the pole hole 60 of the negative pole block 62 is connected with the edge of the pole platform 55 of the negative pole 52 by laser welding.

The negative electrode block plastic 42 is an insulating material, such as PP, PPs, etc.; the anode block plastic 41 is a non-insulating material, which is used to conduct the anode block 61 and the cover plate 2, and may be a conductive material such as PP + carbon, metal, silicon carbide, etc.

The positive electrode block plastic 41 and the negative electrode block plastic 42 have different functions, and in a battery design scheme, the shell and the positive electrode block 61 are usually required to be electrically connected to each other to ensure a certain electrical connection, so that the potential of the shell can be increased, and electrochemical corrosion of an electric core on the inside of the shell in the charging and discharging processes can be avoided, so that the positive electrode block plastic 41 corresponding to the positive electrode block 61 needs to be made of a conductive material, for example, the conductive plastic or a metal material can be adopted; because the cover plate 2 of the housing top cover has a certain electrical connection requirement with the positive electrode block 61, in order to avoid the short circuit between the negative electrode block 62 and the cover plate 2 of the housing top cover, the negative electrode block plastic 42 corresponding to the negative electrode block 62 needs to be made of an insulating material to ensure that the negative electrode block plastic has good electrical insulation performance, for example, the insulating plastic can be used. In the structural design aspect of the anode block plastic 41 and the cathode block plastic 42, the cathode block plastic 42 is required to effectively coat the cathode block 62 as much as possible due to the insulation requirement of the cathode block plastic 42; the structure of the positive electrode block plastic 41 is not required to be excessive because the positive electrode block plastic is conducted with the top cover plate 2, and the structure of the positive electrode block plastic can be the same as that of the negative electrode block plastic 42 for the sake of appearance, and can also be designed to be different from that of the negative electrode block plastic 42.

For laser welding, the material of the negative pole column 52 assembled corresponding to the negative pole block 62 is the same as that of the composite layer two 62b, and is preferably copper; the material of the positive electrode post 51 attached to the positive electrode block 61 is preferably aluminum, in conformity with the positive electrode block 61. The pole holes 60 of the positive pole block 61 and the negative pole block 62 can be rectangular openings matched with the pole bosses 54, and the peripheries of the pole holes can be respectively laser-welded with the pole platforms 55 of the positive pole 51 and the negative pole 52 so as to ensure the effective connection of the cover plate assembly.

Generally speaking, the material of the positive connecting sheet is aluminum, the material of the negative connecting sheet is copper, and the welding method of laser welding requires that the connecting sheet and the correspondingly welded pole and pole block are consistent in material, so that the material of the positive pole 51 is aluminum, and the material of the negative pole 52 is copper correspondingly; the positive electrode block 61 is made of aluminum, and the negative electrode block 62 is made of copper. However, since the density of copper is 3 times that of aluminum, in order to reduce the weight of the negative pole block, the negative pole block 62 can be made of copper and aluminum composite, so that the weight of the negative pole block 62 can be reduced as much as possible even when the welding conditions are satisfied. For example, as shown in fig. 6, the material of the second composite layer 62b is the same copper as the corresponding welded negative electrode pillar 52, and the material of the first composite layer 62a is aluminum.

Reducing the weight of the negative terminal reduces the overall weight of the battery, which is intended to increase the energy density of the battery, and the energy density of the battery is calculated by the following formula: the energy density is the battery capacity/battery weight, so the battery weight is a relatively concerned parameter in the battery design process, and even if the weight is reduced by several grams, the energy density of the battery is obviously improved.

Please refer to fig. 3 and fig. 7 in combination, wherein fig. 7 is a schematic plan view showing the assembled battery cover plate assembly 1 at different viewing angles, which is a bottom view, a front view and a top view from top to bottom. The assembly process of the battery cover plate assembly 1 of the present embodiment is as follows: according to the installation direction of the arrow shown in fig. 3, the cover plate plastic 3, the cover plate 2, the anode block plastic 41 and the cathode block plastic 42, the sealing rings 7, the anode block 61 and the cathode block 62 are sequentially arranged on the anode column 51 and the cathode column 52, the two sealing rings 7 are respectively embedded into the cover plate 2 and the corresponding anode block plastic 41 and cathode block plastic 42, and the two sealing rings 7 are respectively contacted with the cover plate plastic 3, so that the anode column 51 and the cathode column 52 are respectively embedded into the cover plate plastic 3; at this time, the pole bosses 54 on the positive pole post 51 and the negative pole post 52 sequentially pass through the pole holes 30 in the cover plate plastic 3, the pole holes 20 in the cover plate 2, the seal ring 7, the pole holes 40 in the positive pole block plastic 41 and the negative pole block plastic 42, and the pole holes 60 in the positive pole block 61 and the negative pole block 62, and are then pressed to the state shown in fig. 7. Referring to fig. 8, the edge of the post platform 55 of the positive post 51 is laser welded to the inner edge of the post hole 60 of the positive block 61 at the marked position 81 of the sectional view D-D; referring to fig. 9, the edge of the post platform 55 in the negative post 52 is laser welded to the inner edge of the post hole 60 of the negative block 62 at the indicated location 82 of the cross-sectional view E-E. After laser welding, the positive pole 51 and the negative pole 52 can be effectively connected with the positive pole block 61 and the negative pole block 62 respectively, effective compression of the sealing ring 7 can be ensured, and effective sealing of the cover plate 2 and the positive pole 51 and the negative pole 52 can be ensured while the electrical connection is ensured to be effective.

Based on above-mentioned battery cover plate subassembly, this application embodiment still provides a battery electricity core, includes: the shell, the winding core arranged in the shell, the connecting sheet and the battery cover plate assembly. The winding core is provided with a lug, and the connecting sheet is connected with the lug; the battery cover plate component is as shown in the foregoing, the cover plate plastic and the pole column of the battery cover plate component are matched with the end face, provided with the pole lug, of the winding core, and the connecting sheet penetrates into the pole column guide groove of the pole column.

The winding core can be a winding structure or a lamination structure in structural form, and can be a single winding core or a structure with multiple winding cores connected in parallel in composition relation. The plastic of the cover plate has two functions: firstly, the insulation property ensures the safety; and secondly, the end face of the winding core is supported completely so as to achieve the purpose of fixing the winding core. Therefore, the matching part of the cover plate plastic and the end face of the winding core needs to be flat and cannot be protruded, otherwise, the winding core can be excessively extruded by the protruded part, and potential safety hazards are caused.

The utmost point post guide slot is seted up in the centre of the utmost point post boss of utmost point post, can satisfy the assembly demand of electric core, for utmost point ear and connection piece on rolling up the core provide the assembly passageway. In this embodiment, the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered by the connecting sheet penetrate into the terminal guide groove. After the battery cover plate assembly, the winding core and the shell are assembled, the connecting sheet and the lug on the winding core can penetrate through the pole guide groove on the pole, and after assembly, the connecting sheet and the lug on the winding core can be hermetically welded with the pole platform of the pole boss, so that the connecting sheet and the lug of the winding core are hermetically connected with the pole block and the pole of the battery cover plate assembly. Through utmost point post guide slot will connect piece and utmost point ear integration to in the battery cover plate subassembly, after the assembly roll up the distance between core and the apron and can fall to minimumly, its high theoretical only that can accomplish the thickness of apron plastic can make the utilization ratio of present electric core inner space accomplish the highest.

It should be noted that, in the above embodiment, two pole blocks of the battery core are also assembled on the same cover plate corresponding to the design requirement that two pole lugs of the winding core are on the same end surface. In other embodiments, the two pole pieces of the cell can be assembled on the cover plates corresponding to the two opposite end surfaces, respectively, corresponding to the design requirement that the two pole lugs of the winding core are respectively arranged on the two opposite end surfaces, and accordingly, two sets of cover plate assemblies are required to be assembled to the shell respectively to be matched with the two opposite end surfaces of the winding core in the shell, which are provided with the pole lugs and the connecting sheets.

In conclusion, upon reading the present detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure can be presented by way of example only, and not limitation. Those skilled in the art will appreciate that the present application is intended to cover various reasonable variations, adaptations, and modifications of the embodiments described herein, although not explicitly described herein. Such alterations, improvements, and modifications are intended to be suggested by this disclosure, and are within the spirit and scope of the exemplary embodiments of this disclosure.

Furthermore, certain terminology has been used in this application to describe embodiments of the disclosure. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the disclosure.

It should be appreciated that in the foregoing description of embodiments of the disclosure, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of the subject disclosure. Alternatively, various features may be dispersed throughout several embodiments of the application. This is not to be taken as an admission that any of the features of the claims are essential, and it is fully possible for a person skilled in the art to extract some of them as separate embodiments when reading the present application. That is, embodiments in the present application may also be understood as an integration of multiple sub-embodiments. And each sub-embodiment described herein is equally applicable to less than all features of a single foregoing disclosed embodiment.

In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the application are to be understood as being modified in certain instances by the term "about", "approximately" or "substantially". For example, "about," "approximately," or "substantially" may mean a 20% change in the soil of the values it describes, unless otherwise specified. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments of the application are approximations, the numerical values set forth in the specific examples are reported as precisely as possible.

Each patent, patent application, publication of a patent application, and other material, such as articles, books, descriptions, publications, documents, articles, and the like, cited herein is hereby incorporated by reference. All matters hithertofore set forth herein except as related to any prosecution history, may be inconsistent or conflicting with this document or any prosecution history which may have a limiting effect on the broadest scope of the claims. Now or later associated with this document. For example, if there is any inconsistency or conflict in the description, definition, and/or use of terms associated with any of the included materials with respect to the terms, descriptions, definitions, and/or uses associated with this document, the terms in this document are used.

Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Accordingly, the disclosed embodiments are presented by way of example only, and not limitation. Those skilled in the art may implement the present application in alternative configurations according to the embodiments of the present application. Thus, embodiments of the present application are not limited to those embodiments described with accuracy in the application.

Claims (8)

1. A battery cover plate assembly, comprising: the device comprises a cover plate, cover plate plastic, pole block plastic, a pole column, a pole block and a sealing ring; the cover plate, the cover plate plastic, the pole block plastic and the pole block are respectively provided with a pole column hole, and the pole column is provided with a pole column guide groove; the pole sequentially penetrates through the pole column hole of the cover plate plastic, the pole column hole of the cover plate, the sealing ring, the pole column hole of the pole block plastic and the pole column hole of the pole block to be connected with the pole block; the sealing washer inlay in the utmost point piece plastic and apron and with apron plastic contact.

2. The battery cover plate assembly of claim 1, wherein the post comprises a post end plate and a post boss disposed on the post end plate, the post boss having a post platform; the pole boss sequentially penetrates through the pole hole of the cover plate plastic, the pole hole of the cover plate, the sealing ring, the pole hole of the pole block plastic and the pole hole of the pole block; the edge of the pole platform is welded with the inner edge of the pole hole of the pole block; the pole terminal plate is embedded into the cover plate plastic.

3. The battery cover plate assembly of claim 1, wherein there are two of said pole pieces, a positive pole piece and a negative pole piece; two pole block plastics are respectively a positive pole block plastic and a negative pole block plastic; the number of the polar columns is two, namely a positive polar column and a negative polar column.

4. The battery cover plate assembly of claim 3, wherein the negative pole piece has a composite layer structure.

5. The battery cover plate assembly of claim 1, wherein the cover plate plastic has a hollowed-out hole and a plastic groove.

6. The battery cover plate assembly of claim 2, wherein the post platform is welded to a tab that passes through the post channel, the tab connecting a tab on a battery roll core.

7. A battery cell comprises a shell and a winding core arranged in the shell, wherein a tab is arranged on the winding core; it is characterized by also comprising: the battery cover plate assembly comprises a connecting piece connected with a lug on the winding core and the battery cover plate assembly of any one of claims 1 to 6, wherein a cover plate plastic and a pole of the battery cover plate assembly are matched with the end face, provided with the lug, of the winding core, and the connecting piece penetrates into the pole guide groove.

8. The battery cell of claim 7, wherein the connecting sheet covers the tab on the winding core, and the connecting sheet and the tab covered thereby penetrate into the tab guide slot.

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