CN219575893U - Battery cell cover plate and battery cell - Google Patents

Abstract

The utility model discloses a battery cell cover plate and a battery cell, comprising: the cover plate body is provided with a pole mounting hole; the pole is arranged in the pole mounting hole in a penetrating mode, the pole comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively limited and pressed against the two side edges of the pole mounting hole, and at least one of the first limiting portion and the second limiting portion is formed in an extrusion mode. According to the battery cell cover plate provided by the embodiment of the utility model, after the pole is penetrated into the cover plate body, at least one of the first limiting part and the second limiting part is extruded, so that the purpose of fixing the pole and the cover plate body can be realized, parts consumed when other fixing modes are adopted by the pole and the cover plate body can be avoided in an extrusion fixing mode, the number of parts of the battery cell cover plate is reduced, and the manufacturing cost of the battery cell cover plate is further reduced.

Description

Battery cell cover plate and battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell cover plate and a battery cell with the battery cell cover plate.

Background

Lithium ion batteries are becoming a research hotspot of current power batteries due to the relatively mature technology. The battery core is used as a core component of the lithium ion battery and structurally mainly comprises an external insulating component, a packaging pole group component, a cover plate internal insulating component and an electric connecting component. The electrode group inside the battery core is connected with the electrode post on the cover plate, and the positive electrode and the negative electrode are respectively led out to realize a complete circuit. At present, the battery cell cover plate is still in a riveting structure, the positive electrode column and the negative electrode column are respectively in close fit with the riveting blocks through a riveting process, but when the connection is realized through the riveting process, the riveting blocks are too many, so that the number of parts is large, the manufacturing cost is high, and therefore, an improvement space exists.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a battery cell cover plate, which reduces the manufacturing cost and the complexity of the connection process.

According to an embodiment of the utility model, a battery cell cover plate comprises: the cover plate body is provided with a pole mounting hole; the pole is arranged in the pole mounting hole in a penetrating mode, the pole comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively limited and pressed against the two side edges of the pole mounting hole, and at least one of the first limiting portion and the second limiting portion is formed in an extrusion mode.

According to the battery core cover plate body provided by the embodiment of the utility model, at least one of the first limiting part and the second limiting part is deformed by extruding the first limiting part and the second limiting part protruding out of the end part of the pole, so that the battery core cover plate body can be attached and connected with the cover plate body, and the purpose of fixing the pole and the cover plate body is further realized. The parts consumed when the cover plate body is fixed in other modes can be avoided through the mode of extrusion fixation, so that the number of parts of the cover plate body is reduced, and the manufacturing cost of the battery cell cover plate is further reduced. Meanwhile, the battery cell cover plate of the embodiment is easy to process, and is beneficial to improving production efficiency.

According to the battery cell cover plate provided by the embodiment of the utility model, the pole further comprises a main body part, the first limiting part and the second limiting part are respectively positioned at two ends of the main body part, and at least one of the first limiting part and the second limiting part extends outwards along the radial direction of the main body part after extrusion molding.

According to the battery cell cover plate provided by the embodiment of the utility model, the extension length of the first limiting part in the radial direction of the main body part is the same as the extension length of the second limiting part in the radial direction of the main body part.

According to the battery cell cover plate provided by the embodiment of the utility model, the thickness of the first limiting part in the axial direction of the main body part is the same as the thickness of the second limiting part in the axial direction of the main body part.

According to the embodiment of the utility model, the battery cell cover plate further comprises: the sealing insulation structure is used for insulating and spacing the polar column from the cover plate body, at least part of the sealing insulation structure surrounds the inner peripheral wall of the polar column mounting hole, and the first limiting part and the second limiting part are both limited and pressed against the sealing insulation structure.

According to the battery cell cover plate provided by the embodiment of the utility model, the sealing insulation structure is provided with the first positioning part, and at least one of the first limiting part and the second limiting part is provided with the second positioning part which is matched with the first positioning part in a positioning way after extrusion molding.

According to the battery cell cover plate provided by the embodiment of the utility model, one of the first positioning part and the second positioning part is configured as a positioning hole, and the other is configured as a positioning protrusion, and the positioning protrusion is inserted into the positioning hole.

According to the battery cell cover plate provided by the embodiment of the utility model, the sealing insulation structure comprises an upper plastic, a sealing ring and a lower plastic, wherein the upper plastic and the sealing ring are both positioned in the pole mounting hole and respectively in limiting pressing with the first limiting part and the second limiting part, and the lower plastic is positioned on one side of the cover plate body facing the battery cell and is connected with the sealing ring.

According to the battery cell cover plate provided by the embodiment of the utility model, the overall height of the pole post after at least one of the first limiting part and the second limiting part is extruded to be H, and the overall height is as follows: h is more than 3mm and less than 8mm.

The utility model also provides a battery cell, which comprises a pole group and the battery cell cover plate.

The battery cell and any of the above battery cell cover plates have the same advantages over the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a cell cover plate according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a structure of a pole according to an embodiment of the present utility model after being pressed;

FIG. 3 is a schematic view of the structure of a pole according to an embodiment of the present utility model when not pressed;

FIG. 4 is a schematic view of the structure of a post after extrusion according to an embodiment of the present utility model;

FIG. 5 is a top view of a first positioning portion and a pole according to an embodiment of the present utility model;

fig. 6 is a top view of a cell cover plate according to an embodiment of the utility model.

Reference numerals:

the cell cover plate 100,

a cover plate body 1, a pole mounting hole 11,

the pole 2, the first limit part 21, the second position part 211, the second limit part 22, the main body part 23,

the sealing insulation structure 3, the first positioning part 31, the positioning hole 311, the upper plastic 32, the sealing ring 33, the second flange 331, the lower plastic 34 and the first flange 341.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A cell cover 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 6, including: the cover body 1 and the pole 2. As shown in fig. 1, the cover body 1 is configured as a strip structure, and is an aluminum plate made of aluminum material. Meanwhile, a pole mounting hole 11 is formed in the cover plate body 1 and is used for achieving a fixing effect in cooperation with the pole 2.

And, the pole 2 includes a first limit portion 21 and a second limit portion 22. When the pole 2 is inserted into the pole mounting hole 11, the first limiting portion 21 and the second limiting portion 22 are protruding from the pole mounting hole 11. Namely, the first limiting part 21 and the second limiting part are respectively limited and pressed on the two side edges of the pole mounting hole 11.

At least one of the first limiting portion 21 and the second limiting portion 22 is formed by extrusion. That is, in the actual installation, the pole 2 is first inserted into the pole mounting hole 11 of the cover plate body 1, so that the first limiting portion 21 and the second limiting portion 22 protrude out of the pole mounting hole 11, then at least one of the first limiting portion 21 and the second limiting portion 22 is pressed, so that at least one of the first limiting portion 21 and the second limiting portion 22 is extruded on the cover plate body 1, at least one of the deformed first limiting portion 21 and second limiting portion 22 is attached to the cover plate body 1, the connection process is completed,

it should be noted that, when the pole 2 is extruded and deformed and attached to the cover plate body 1, the two ends of the pole 2 clamp the cover plate body 1 respectively to achieve the connection effect when seen from the vertical direction. The cover plate body 1 of the embodiment is provided with a plurality of pole mounting holes 11, each pole mounting hole 11 is connected with a pole 2, and each pole 2 is extruded and deformed to be attached to the cover plate body 1. Therefore, the first limit parts 21 or the second limit parts 22 of the plurality of pole posts 2 can be extruded and deformed to be connected with the cover plate body 1, so that the connection strength can be improved, and the connection stability can be ensured.

And, through the extrusion connection of the first limit part 21 and the second limit part 22 at the end part of the pole 2 on the end face of the cover plate body 1, parts consumed by the installation modes such as riveting and screwing can be directly omitted, namely, the cover plate body 1 is reduced in weight by replacing the fixing process mode, and the manufacturing cost of parts is saved. Meanwhile, the extrusion fixing mode has the advantages of few process steps, simplicity in operation, capability of greatly shortening the processing time cost and contribution to improving the production efficiency.

According to the battery cell cover plate 100 of the embodiment of the utility model, at least one of the first limiting part 21 and the second limiting part 22 is deformed by extruding the first limiting part 21 and the second limiting part 22 protruding out of the end part of the pole 2, so that the battery cell cover plate can be attached to the cover plate body 1, and the purpose of fixing the pole 2 and the cover plate body 1 is further realized. The parts consumed when the cover plate body 1 is fixed in other modes can be avoided through the extrusion fixing mode, so that the number of parts of the cover plate body 1 is reduced, and the manufacturing cost of the battery cell cover plate 100 is further reduced. Meanwhile, the battery cell cover plate 100 of the embodiment is easy to process, which is beneficial to improving the production efficiency.

In some embodiments, the pole 2 further includes a main body portion 23, the first limiting portion 21 and the second limiting portion 22 are respectively located at two ends of the main body portion 23, and at least one of the first limiting portion 21 and the second limiting portion 22 extends outward in a radial direction of the main body portion 23 after extrusion molding. As shown in fig. 3 and 4, the first limiting portion 21 and the second limiting portion 22 are both annular structures, the main body portion 23 is cylindrical, and the first limiting portion 21 and the second limiting portion 22 are both deformable structures protruding from the main body portion 23.

Specifically, the ends of the first limiting portion 21 and the second limiting portion 22 may be slightly inclined by a partial angle, so that the first limiting portion 21 and the second limiting portion 22 may be inclined outwards relative to the main body portion 23, thereby ensuring that the first limiting portion 21 and the second limiting portion 22 can extend radially outwards when being extruded, and further attaching to the cover plate body 1 to achieve a fixing effect.

In some embodiments, the extension length of the first stopper portion 21 in the radial direction of the main body portion 23 is the same as the extension length of the second stopper portion 22 in the radial direction of the main body portion 23. That is, as shown in fig. 4, when the first stopper portion 21 and the second stopper portion 22 deform by being pressed, the deformation amounts of the first stopper portion 21 and the second stopper portion 22 are the same, that is, the lengths of the radial extension are the same. Therefore, when the first limiting part 21 and the second limiting part 22 are extruded, the radial elongation of the first limiting part and the second limiting part is the same, so that the connection lengths of the limiting parts of the pole 2 attached to the two ends of the cover plate body 1 are the same, and the connection effect of the pole 2 and the cover plate body 1 is facilitated to be stabilized.

In some embodiments, the thickness of the first stopper 21 in the axial direction of the main body 23 is the same as the thickness of the second stopper 22 in the axial direction of the main body 23. It can be understood that the first limiting portion 21 and the second limiting portion 22 are both configured on the same pole 2, and the materials, the lengths, etc. of the first limiting portion and the second limiting portion are the same. The thicknesses of the first limiting part 21 and the second limiting part 22 are kept the same, so that the deformation amount of the first limiting part 21 and the second limiting part 22 is the same when the first limiting part and the second limiting part are subjected to the same pressure, the pressure connected with the cover plate body 1 is the same, and the formed radial elongation is the same.

From this, can guarantee that the output effect of first spacing portion 21 and second spacing portion 22 is the same, and then can select spacing portion wantonly to extrude or extrude simultaneously spacing portion etc. and all can realize fixed utmost point post 2 when carrying out extrusion installation for whole installation is more simple reliable, and is favorable to guaranteeing installation effect and later stage and carry out periodic maintenance according to the characteristic of spacing portion.

In some embodiments, the cell cover 100 further comprises: the sealing insulation structure 3, the sealing insulation structure 3 is used for insulating and spacing the pole 2 from the cover plate body 1, at least part of the sealing insulation structure 3 surrounds the inner peripheral wall of the pole mounting hole 11, and the first limiting part 21 and the second limiting part 22 are both limited and pressed on the sealing insulation structure 3.

The sealing insulating structure 3 is also provided with a post mounting hole 11. In actual installation, the sealing insulation structure 3 is penetrated through the pole mounting hole 11, so that the sealing insulation structure 3 can be attached to the inner peripheral wall of the pole mounting hole 11, and then the pole 2 is penetrated through the pole mounting hole 11, so that the first limiting part 21 and the second limiting part 22 are propped against the sealing insulation structure 3.

Therefore, the main body 23, the first limiting part 21 and the second limiting part 22 of the pole 2 are not in direct contact with the cover plate body 1, so that the insulation effect is ensured.

The sealing insulating structure 3 may be configured in a ring shape or a bar shape, and the like, so long as the insulating effect is satisfied, which is not limited in this embodiment.

In some embodiments, the sealing insulating structure 3 is formed with a first positioning portion 31, and at least one of the first limiting portion 21 and the second limiting portion 22 is formed with a second positioning portion 211 that is in positioning fit with the first positioning portion 31 after extrusion molding. It should be noted that, it is understood that the first positioning portion 31 may be configured as a ring, a rectangle, or the like, and the first limiting portion 21 or the second limiting portion 22 may be configured as a ring, and when the first limiting portion 21 or the second limiting portion 22 is deformed by pressure, it will form a ring-shaped second positioning portion 211 around the end of the main body portion 23. Wherein, the area of the first positioning portion 31 is not smaller than the area of the second positioning portion 211, so that the second positioning portion 211 can be ensured to be entirely attached to the first positioning portion 31 to realize positioning and matching, and an insulation effect is ensured.

In some embodiments, one of the first positioning portion 31 and the second positioning portion 211 is configured as a positioning hole 311, and the other is configured as a positioning protrusion that is inserted into the positioning hole 311. It should be noted that, as shown in fig. 5, the positioning holes 311 may be configured on the first positioning portion 31, where the number of the positioning holes 311 is plural, and the second positioning portion 211 is accompanied by positioning protrusions when formed, the number of the positioning protrusions may be consistent with the positioning holes 311, and the diameter of the positioning holes 311 is consistent with the diameter of the positioning protrusions, so that the positioning protrusions may be smoothly inserted into the positioning holes 311.

That is, the second positioning portion 211 has a ring-shaped structure formed by attaching the seal insulating mechanism when the first limiting portion 21 or the second limiting portion 22 is pressed. Therefore, the second positioning portion 211 can contact and press the first positioning portion 31 on the sealing insulation mechanism while pressing the cover plate body 1, and the first positioning portion 31 is configured with a plurality of positioning holes 311, so that the second positioning portion 211 gradually interferes with the positioning holes 311 during pressing, and the second positioning portion 211 passes through the positioning holes 311 to finally form positioning protrusions.

It can be appreciated that the positioning hole 311 can drain the excessive material of the first limiting portion 21 or the second limiting portion 22 during the extrusion process, so as to avoid the second positioning portion 211 from being excessively deformed and damaged.

Meanwhile, the formed positioning protrusion can be clamped with the positioning hole 311, so that the second positioning part 211 is prevented from rotating, and the limiting effect is achieved. Wherein, this embodiment sets up a plurality of locating holes 311, and a plurality of locating holes 311 evenly circumference distributes on first location portion 31 to make the protruding evenly distributed of location that forms, guaranteed spacing atress homogeneity, and a plurality of location are protruding still to have improved spacing ability, guarantee the connection stability of post 2 and apron body 1 after the extrusion.

In some embodiments, the sealing insulating structure 3 includes an upper plastic 32, a sealing ring 33, and a lower plastic 34, where the upper plastic 32 and the sealing ring 33 are both located in the pole mounting hole 11 and are respectively in spacing pressing with the first spacing portion 21 and the second spacing portion 22, and the lower plastic 34 is located on a side of the cover body 1 facing the battery cell and is connected with the sealing ring 33.

It is understood that, as shown in fig. 2, the upper plastic 32 and the lower plastic 34 may be rectangular and sleeved on the end surface of the terminal mounting hole 11 facing away from the battery core, and meanwhile, the area of the upper plastic 32 is larger than that of the second positioning portion 211. The edge of the lower plastic 34 is further formed with a first flange 341 along a direction away from the upper plastic 32, so that the contact between the cover plate body 1 and the pole 2 can be sealed as much as possible by the lower plastic 34 through the first flange 341.

And the sealing ring 33 is disposed between the lower plastic 34 and the pole 2, specifically, the sealing ring 33 may be directly sleeved in the pole mounting hole 11, and the sealing ring 33 forms a second flange 331 at the edge facing the direction of the upper plastic 32, and the sealing ring may abut against the lower plastic 34 and the cover body 1 through the second flange 331, so as to isolate the contact between the pole 2 and the cover body 1. Therefore, through the cooperation of the upper plastic 32, the sealing ring 33 and the lower plastic 34, the contact between the pole 2 and the sealing insulation structure 3 from top to bottom can be ensured, and the insulation effect is ensured.

Wherein, the distance between the upper plastic 32 and the edge of the pole 2 is a, and the following is satisfied: a is more than 2mm. That is, as shown in fig. 5, the distance between the edge of the upper plastic 32 and the edge of the pole 2 is the creepage distance, and the insulation performance can be further ensured by designing a with the above parameter range.

In some embodiments, the overall height of the post 2 after at least one of the first and second limiting portions 21 and 22 is H, and satisfies: h is more than 3mm and less than 8mm. As shown in fig. 2, after any one of the first and second stopper portions 21 and 22 of the pole 2 is deformed by pressing, the height of the pole 2 is reduced. Therefore, the height of the pole 2 will directly affect the connection effect of the battery cover body 1;

if the pole 2 is high, the whole pole 2 is larger, the first limiting part 21 and the second limiting part 22 are smaller, the generated positioning protrusion is long, and the overlong positioning protrusion interferes with other structures to influence the limiting effect.

If the pole 2 is low, the whole pole 2 is smaller, the first limiting portion 21 and the second limiting portion 22 are smaller, the generated positioning protrusion is short, and the positioning protrusion which is too short cannot penetrate out through the positioning hole 311, so that the limiting effect cannot be achieved.

From this, the utmost point post 2 of this embodiment has above reasonable interval according to the condition as above to utmost point post 2 height H design, and utmost point post 2 height H sets up when 3 ~ 8mm, can effectually realize the spacing function of utmost point post 2, guarantees simultaneously that the location is protruding not to contact with other structures, guarantees the stability of the fixed mode that utmost point post 2 used extrusion deformation.

It should be noted that, in the present utility model, the battery cell cover plate 100 has a plurality of posts 2, as shown in fig. 1, two posts 2 are provided, one is a positive post, the other is a negative post, and the positive post and the negative post have the same structure and are connected and fixed with the cover plate body by adopting the same structural form.

The utility model further provides a battery cell.

A cell according to an embodiment of the present utility model comprises a pole group and a cell cover 100 according to any of the above. The pole groups and the cell cover 100 cooperate to form a cell. The battery cell of the embodiment of the utility model realizes connection by changing the connection mode of the battery cell cover plate 100 and utilizing extrusion, so that the formed battery cell cover plate 100 has less parts, simplifies the process production flow and improves the production efficiency. Meanwhile, the thickness of the battery cell cover plate 100 is reduced, parts such as riveting blocks are omitted, and material cost is saved.

1. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

2. In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

3. In the description of the present utility model, "plurality" means two or more.

4. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

5. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A cell cover plate, comprising:

the cover plate body is provided with a pole mounting hole;

the pole is arranged in the pole mounting hole in a penetrating mode, the pole comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively limited and pressed against the two side edges of the pole mounting hole, and at least one of the first limiting portion and the second limiting portion is formed in an extrusion mode.

2. The cell cover of claim 1, wherein the terminal post further comprises a main body portion, the first and second limiting portions are located at two ends of the main body portion, respectively, and at least one of the first and second limiting portions extends outward in a radial direction of the main body portion after extrusion.

3. The cell cover plate according to claim 2, wherein an extension length of the first limit portion in a radial direction of the main body portion is the same as an extension length of the second limit portion in the radial direction of the main body portion.

4. The cell cover plate according to claim 2, wherein a thickness of the first limit portion in an axial direction of the main body portion is the same as a thickness of the second limit portion in the axial direction of the main body portion.

5. The cell cover of claim 1, further comprising: the sealing insulation structure is used for insulating and spacing the polar column from the cover plate body, at least part of the sealing insulation structure surrounds the inner peripheral wall of the polar column mounting hole, and the first limiting part and the second limiting part are both limited and pressed against the sealing insulation structure.

6. The cell cover plate according to claim 5, wherein the sealing insulating structure is formed with a first positioning portion, and at least one of the first limiting portion and the second limiting portion is formed with a second positioning portion that is in positioning fit with the first positioning portion after extrusion molding.

7. The cell cover of claim 6, wherein one of the first and second positioning portions is configured as a positioning hole and the other is configured as a positioning protrusion that is inserted into the positioning hole.

8. The battery cell cover plate according to claim 5, wherein the sealing insulation structure comprises an upper plastic, a sealing ring and a lower plastic, the upper plastic and the sealing ring are both positioned in the pole mounting hole and respectively in limiting pressing with the first limiting part and the second limiting part, and the lower plastic is positioned on one side of the cover plate body facing the battery cell and is connected with the sealing ring.

9. The cell cover plate according to claim 1, wherein the overall height of the terminal post after at least one of the first limit portion and the second limit portion is H, and satisfies: h is more than 3mm and less than 8mm.

10. A cell characterized by a pole group and a cell cover as claimed in any one of claims 1-9.