CN220753587U

CN220753587U - Split type battery cover plate structure

Info

Publication number: CN220753587U
Application number: CN202322465013.3U
Authority: CN
Inventors: 刘敏; 廖忠传; 潘飞; 王正鸿
Original assignee: Xiamen Golden Dragon Auto Body Co Ltd
Current assignee: Xiamen Golden Dragon Auto Body Co Ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-04-09
Anticipated expiration: 2033-09-12

Abstract

The utility model discloses a split battery cover plate structure, which comprises a top cover plate, a pole, a sealing piece, a bottom sealing plate and lower plastic; the sealing element is sleeved on the pole, the pole penetrates through the top cover sheet, and the bottom sealing plate fixedly locates the pole and the sealing element in the top cover sheet; a buckling mechanism is arranged between the bottom sealing plate and the lower plastic, and comprises a buckling part arranged on the bottom sealing plate and a buckling part arranged on the lower plastic; the buckling part is provided with at least one buckling part, and the side of the buckling part is provided with a yielding area for buckling the buckling part. By adopting the technical scheme of the utility model, the traditional integral welding mode is not needed between the top cover sheet and the lower plastic, the occurrence of welding parts is directly avoided, the defects caused by the welding parts are overcome, and the quick and convenient split dismounting mode is adopted, so that the repair of the battery cover plate is easier, the service life of parts is longer, and the cost is reduced.

Description

Split type battery cover plate structure

Technical Field

The utility model relates to the field of battery cover plate production, in particular to a split battery cover plate structure.

Background

The lithium battery is a battery using lithium metal and lithium alloy as cathode materials and using nonaqueous electrolyte solution, and the lithium metal has high requirements on environment in processing, preserving and using due to the very active chemical characteristics of the lithium metal, so the battery has become the mainstream of the modern society along with the development of scientific technology.

The cover plate is used as an important component of the battery shell, plays a role in connection with the internal electrode and the outside, and at present, the cover plate of the battery mainly adopts an integrated structure, the lower plastic part is used as an insulating part to be attached to the top cover sheet, the manufacturing process is complex, the working procedures are various, and the later maintenance and the waste recovery during the production are inconvenient.

In addition, the existing battery cover plate structure has the following defects that (1) the existing lower plastic part and the top cover plate are welded in an ultrasonic welding mode, vibration generated in the ultrasonic welding process can cause cracking or vibration falling of an explosion-proof valve used for preventing explosion caused by overlarge pressure on the battery cover plate, so that the explosion-proof valve cannot play a real explosion-proof role, and the safety of the whole battery is greatly reduced; (2) The welding process of the lower plastic and the top cover sheet is complicated, and time and labor are wasted; (3) If the welding part between the lower plastic part and the top cover piece is cracked, if the lower plastic is detached from the top cover piece, the repair of the welding is very troublesome, and in the case of the situation, manufacturers generally discard the whole battery cover plate, so that great waste is caused, and the scrapping cost is increased; (4) The position of the lower plastic part for installing the internal battery core is limited and cannot be changed, and when the electrode conductive surface needs to be enlarged, the position cannot be realized.

In summary, the existing battery cover plate structure needs to be further improved and optimized to meet the requirements of safety and production.

Disclosure of Invention

The utility model provides a split type battery cover plate structure, which solves the defects caused by the traditional welding mode of the existing lower plastic and top cover plates, and adopts the following technical scheme:

a split battery cover plate structure comprises a top cover plate, a pole, a sealing piece, a bottom sealing plate and lower plastic; the sealing element is sleeved on the pole, the pole penetrates through the top cover sheet, and the bottom sealing plate fixedly locates the pole and the sealing element in the top cover sheet; a buckling mechanism is arranged between the bottom sealing plate and the lower plastic, and comprises a buckling part arranged on the bottom sealing plate and a buckling part arranged on the lower plastic; the buckling part is provided with at least one buckling part, and a yielding area for buckling the buckling part is arranged beside the buckling part; when the top cover sheet is fixedly arranged on the lower plastic, the hasp part drives the buckling part to deform or reset on the abdication area so as to be buckled and fixed with the hasp part.

Preferably, a plurality of the buckling parts are arranged, and the buckling parts are arranged on the lower plastic at intervals.

Preferably, a plurality of the buckling parts are provided with buffer cuts.

Preferably, the top cover sheet is provided with an explosion-proof valve protection patch in a penetrating manner, and the lower plastic is provided with a battery cell hole.

Preferably, the buckling part comprises an integrally formed upright post and a guide block, and the guide block is obliquely provided with an oblique contact surface towards the center of the electric core hole.

Preferably, the guide block has a first position relative to the upright, the buckle part has a second position relative to the bottom sealing plate, and when the buckle part and the buckle part are buckled, the buckle part and the buckle part are mutually corresponding and connected in a sealing way at the first position and the second position.

Preferably, the relief area is provided between the top cover sheet and the snap part.

Preferably, the top cover sheet is sealed to the lower plastic surface.

As can be seen from the above description of the present utility model, the present utility model has the following advantages over the prior art:

(1) According to the technical scheme, a buckling mechanism is arranged between the bottom sealing plate and the lower plastic, the buckling mechanism comprises a buckling part arranged on the bottom sealing plate and a buckling tongue part arranged on the lower plastic, the buckling tongue part is provided with at least one buckling tongue part, and the side of the buckling part is provided with a yielding area for buckling the buckling tongue part; when the top cover piece is required to be dismounted on the lower plastic, the top cover piece is only required to be directly covered or separated relative to the lower plastic, so that the buckle part drives the buckling part to deform or reset on the abdication area, the buckling part is buckled or opened relative to the buckle part, and the top cover piece and the lower plastic can be dismounted. Therefore, the traditional integral welding mode is not needed between the top cover plate and the lower plastic, the occurrence of welding parts is directly avoided, the defects caused by the welding parts are overcome, and the quick and convenient split dismounting mode is adopted, so that the repair of the battery cover plate is easier, the service life of parts is longer, and the cost is reduced.

(2) The buckling parts are arranged on the lower plastic at intervals, buffer notches are formed between the buckling parts, so that when the buckling parts drive the buckling parts to deform on the yielding areas, the buckling parts can release the received downward pressure to the yielding areas and simultaneously release certain extrusion force towards the buffer notches, and the buckling parts are prevented from being subjected to long-term stress, so that the buckling parts are easy to crack.

(3) The top cover plate penetrates through the explosion-proof valve protection paste, the traditional welding mode is replaced by the mode that the top cover plate and the lower plastic are detachably buckled, vibration generated in the traditional ultrasonic welding process is directly solved, the explosion-proof valve protection paste can not be subjected to excessive pressure any more to cause cracking or vibration falling, the complete product function of the explosion-proof valve protection paste is guaranteed, and the safety of the whole battery is also guaranteed.

(4) The lower plastic is provided with a battery cell hole which is mainly used for being assembled with a battery cell, the battery products in the existing market are various, the sizes of the contact areas of the battery cells are different, and the sizes of the corresponding needed battery cell holes are also different. Therefore, when the battery cover plate needs to be matched with the battery cores with different sizes, namely, the lower plastic is required to be detached from the top cover plate to replace the lower plastic with the battery core holes with proper sizes, and the battery cover plate is welded in a traditional welding mode, so that the disassembly and the assembly are very troublesome, and the efficiency is affected; if the detachable fastening mode is adopted, the battery cell can be quickly assembled and disassembled, the original lower plastic is disassembled, the lower plastic with the cell hole of the matched battery cell is fastened on the top cover plate, namely, the cell hole of the battery cover plate can be quickly matched with the battery cell, the size and the position of the cell hole can be quickly changed, the interchangeability is stronger, and the battery cell can be more suitable for the market.

(5) The buckling part comprises an integrally formed upright post and a guide block, the guide block is obliquely provided with an inclined contact surface towards the center of the electric core hole, when the buckling part drives the buckling part to deform on the yielding area, the buckling part can directly abut against the inclined contact surface to carry out contact buffering, the buckling part is better driven to deform, the buckling part is prevented from being collided or rubbed violently, and the service life of the buckling part is prolonged.

Drawings

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

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is an overall schematic cross-sectional view of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is a schematic view of the structure of the lower plastic;

FIG. 6 is an enlarged view of a portion B of FIG. 5;

fig. 7 is a schematic structural diagram of a bottom sealing plate according to an embodiment of the utility model.

The reference numerals are explained as follows: 1. a top cover sheet; 2. lower plastic; 21. a cell hole; 3. a pole; 4. a seal; 5. a bottom sealing plate; 6A, a yielding area; 61. a buckle part; 62. a buckling part; 621. a column; 622. a guide block; 7. a buffer cutout; 8. and an explosion-proof valve protection patch.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Please refer to fig. 1 to 6.

The embodiment provides a split battery cover plate structure, which comprises a cover plate 1, a pole 3, a sealing piece 4 and a bottom sealing plate 5

And the lower plastic 2, the sealing element 4 is sleeved on the pole 3, the pole 3 penetrates through the top cover plate 1, the bottom sealing plate 5 is welded and fixed with the top cover plate 1, so that the pole 3 and the sealing element 4 are fixedly arranged in the top cover plate 1, and the top cover plate 1 is fixed with the lower plastic 2, so that a battery cover plate is formed.

In this embodiment, a fastening structure is provided between the bottom sealing plate 5 and the lower plastic 2, the fastening mechanism includes a fastening portion 61 provided on the bottom sealing plate 5 and a fastening portion 62 provided on the lower plastic 2, and a relief area 6A for fastening the fastening portion 62 is provided beside the fastening portion 61, i.e. the relief area 6A is located between the top cover 1 and the fastening portion 61. When the top cover sheet 1 needs to be fixed with the lower plastic 2, the top cover sheet 1 is covered on the lower plastic 2, the buckling part 61 on the bottom sealing plate 5 drives the buckling part 62 to deform and bend gradually towards the yielding area 6A, and after the top cover sheet 1 and the lower plastic 2 are sealed, the buckling part 62 automatically resets, and the buckling part 61 and the buckling part 62 are buckled.

In this embodiment, when the top cover 1 is to be detached from the lower plastic 2, the top cover 1 is directly separated from the lower plastic 2, and the buckle portion 61 on the bottom sealing plate 5 drives the buckle portion 62 upward to deform toward the yielding area 6A until the buckle portion 61 is completely separated from the buckle portion 62, i.e. the buckle portion 62 is automatically reset.

In this embodiment, the latch portion 62 is an elastic member having a certain elasticity, that is, deformation occurs when a force is applied.

Referring to fig. 5 and 6, in the present embodiment, when there is at least one of the buckling portions 62, the buckling portions 62 are arranged on the lower plastic 2 at intervals, and a buffer notch 7 is provided between the buckling portions 62, so that when the buckling portion 61 drives the buckling portion 62 to deform on the yielding region 6A, the buckling portion 62 can release the received downward pressure to the yielding region 6A to cause deformation, and simultaneously release a certain extrusion force towards the buffer notch 7, so as to prevent the buckling portion 62 from cracking easily after long-term stress. Of course, instead of the plurality of buffer cuts 7 formed in the annular strip shown in fig. 6, only one latch portion 62 can be provided, i.e., the latch portion 62 is an entire annular strip; when the latch portion 62 is only one, the latch portion 62 is subjected to a pressing force for a long period of time, and thus a chipping phenomenon may occur.

In this embodiment, the top cover piece 1 runs through and is equipped with explosion-proof valve protection subsides 8, and top cover piece 1 and lower plastic 2 adopt the mode of detachable lock to replace traditional welding mode, and it has directly solved the vibrations that produce among the traditional ultrasonic welding process, and explosion-proof valve protection subsides 8 can not receive too big pressure and appear the fracture condition or exist vibration and drop the phenomenon promptly, guarantees the complete product function of explosion-proof valve protection subsides 8, also guarantees the security of whole battery.

The lower plastic 2 is provided with a cell hole 21, the cell hole 21 is mainly used for being assembled with a battery cell, the battery products in the existing market are various, the sizes of the contact areas of the cells are different, and the sizes of the corresponding needed cell holes 21 are also different. Therefore, when the battery cover plate needs to be adapted to the battery cells with different sizes, the lower plastic 2 needs to be detached from the top cover plate 1 to replace the lower plastic 2 with the battery cell holes 21 with proper sizes, and the battery cover plate is welded in a traditional welding manner, so that the disassembly and assembly are very troublesome, and the efficiency is affected; if the detachable fastening mode is adopted, the battery cell can be quickly assembled and disassembled, the original lower plastic 2 is disassembled, then the lower plastic 2 with the cell hole 21 for matching the battery cell is fastened to the top cover plate 1, namely, the cell hole 21 of the battery cover plate can be quickly matched with the battery cell, the size and the position of the cell hole 21 can be quickly changed, the interchangeability is stronger, and the battery cell can be more suitable for the market.

In this embodiment, the buckling part 62 includes an integrally formed upright post 621 and a guide block 622, the guide block 622 is provided with an inclined contact surface inclined towards the center of the battery cell hole 21, when the buckling part 61 drives the buckling part 62 to deform on the yielding area 6A, the buckling part 61 can directly abut against the inclined contact surface to perform contact buffering, and the buckling part 62 is also better driven to deform, so that the buckling part 62 is prevented from being collided or rubbed violently, and the service life of the buckling part 62 is prolonged.

In this embodiment, referring to fig. 4, the guide block 622 has a first position relative to the upright 621, that is, the guide block 622 is located on the right inner side of the upper end of the upright 621; the latch portion 61 has a second position relative to the bottom sealing plate 5, that is, the latch portion 61 is located at the left and outer sides of the lower end of the bottom sealing plate 5, and the positions of the guide block 622 and the latch portion 61 correspond to each other, so that the latch portion 62 can be in a snap-fit sealing connection with the latch portion 61.

The working principle and the using flow of the utility model are as follows:

during assembly, the sealing element 4 is sleeved on the pole 3, the pole 3 penetrates through the top cover plate 1, the bottom sealing plate 5 and the top cover plate 1 are welded and fixed, so that the pole 3 and the sealing element 4 are fixedly arranged in the top cover plate 1, the top cover plate 1 is covered and pressed towards the lower plastic rubber 2, the buckling part 61 on the bottom sealing plate 5 drives the buckling part 62 to deform and bend gradually towards the yielding area 6A, after the top cover plate 1 and the lower plastic rubber 2 are sealed, the buckling part 62 automatically resets, and the buckling part 61 and the buckling part 62 are buckled. When the top cover 1 is to be detached from the lower plastic 2, the top cover 1 is directly separated from the lower plastic 2, and the buckle portion 61 on the bottom cover 5 drives the buckle portion 62 upward to deform toward the yielding area 6A until the buckle portion 61 is completely separated from the buckle portion 62, i.e. the buckle portion 62 is automatically reset. Therefore, the utility model does not need to adopt the traditional integral welding mode between the top cover plate 1 and the lower plastic 2, directly avoids the occurrence of welding parts and solves the defects caused by the welding parts, and adopts a quick and convenient split disassembly mode, thereby facilitating the repair of the battery cover plate, prolonging the service life of parts and reducing the cost increase.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims

1. The split type battery cover plate structure is characterized by comprising a top cover plate, a pole column, a sealing piece, a bottom sealing plate and lower plastic;

the sealing element is sleeved on the pole, the pole penetrates through the top cover sheet, and the bottom sealing plate fixedly locates the pole and the sealing element in the top cover sheet;

a buckling mechanism is arranged between the bottom sealing plate and the lower plastic, and comprises a buckling part arranged on the bottom sealing plate and a buckling part arranged on the lower plastic; the buckling part is provided with at least one buckling part, and a yielding area for buckling the buckling part is arranged beside the buckling part;

when the top cover sheet is fixedly arranged on the lower plastic, the hasp part drives the buckling part to deform or reset on the abdication area so as to be buckled and fixed with the hasp part.

2. A split cell cover structure as defined in claim 1, wherein: the plurality of the buckling parts are arranged on the lower plastic body at intervals.

3. A split cell cover structure as defined in claim 2, wherein: a buffer notch is arranged among the plurality of the buckling parts.

4. A split cell cover structure as claimed in claim 2 or 3, wherein: the top cover sheet is penetrated and provided with an explosion-proof valve protection paste, and the lower plastic is provided with a battery cell hole.

5. The split cell cover structure as defined in claim 4, wherein: the buckling part comprises an integrally formed upright post and a guide block, and the guide block is obliquely provided with an oblique contact surface towards the center of the battery cell hole.

6. The split cell cover structure as defined in claim 5, wherein: the guide block has a first position relative to the upright post, the hasp part has a second position relative to the bottom sealing plate, and when the buckling tongue part and the hasp part are buckled, the buckling tongue part and the hasp part are mutually corresponding to and are in sealing connection with each other at the first position and the second position.

7. A split cell cover structure as defined in claim 1, wherein: the abdication area is arranged between the top cover sheet and the hasp part.

8. A split cell cover structure as defined in claim 1, wherein: the top cover sheet is sealed with the lower plastic surface.