CN220358206U - Top cover structure and power battery - Google Patents
Top cover structure and power battery Download PDFInfo
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- CN220358206U CN220358206U CN202321808103.1U CN202321808103U CN220358206U CN 220358206 U CN220358206 U CN 220358206U CN 202321808103 U CN202321808103 U CN 202321808103U CN 220358206 U CN220358206 U CN 220358206U
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- structural framework
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- 238000001746 injection moulding Methods 0.000 claims abstract description 118
- 239000012778 molding material Substances 0.000 claims description 26
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- -1 acryl Chemical group 0.000 description 6
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- 239000004743 Polypropylene Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
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- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
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- 238000005253 cladding Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 229920002647 polyamide Polymers 0.000 description 2
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- 229920000573 polyethylene Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
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- 239000010949 copper Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
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- 239000004814 polyurethane Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a top cover structure and a power battery, wherein the top cover structure comprises: the pole assembly comprises a column body and an upper bedplate, and the upper bedplate is sleeved on the column body and connected with the column body; the top cover plate is provided with a top cover through hole, and the column body penetrates through the top cover through hole; the injection molding body is sleeved on the periphery of the column body and arranged between the upper platen and the top cover sheet, and is used for connecting the upper platen, the column body and the top cover sheet; the injection molding body comprises a structural framework, the structural framework comprises a plurality of supporting rods, and at least part of the structural framework is coated in the injection molding body; the structural strength of the injection molding body is greater than that of the structural framework. The power battery comprises the top cover structure. According to the top cover structure and the power battery, the structural framework is arranged in the injection molding body, and at least part of the structural framework is coated in the injection molding body, so that the structural strength of the injection molding body is greatly improved, the problem of breakage or damage of the injection molding body is reduced, and the reliability of the battery structure is further improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a top cover structure and a power battery.
Background
With the increasing prominence of environmental problems, low-carbon economy has become the main stream of future economic development, and the increasingly severe air situation has also further promoted the rise of new energy automobiles. Hybrid electric vehicles and pure electric vehicles are also becoming accepted by a wide range of manufacturers and consumers as representatives of new energy vehicles. The power battery is used as a main power source of the new energy automobile and becomes one of key components of the electric automobile. The top cap utmost point post structure is widely used in power battery top cap always, and under the general condition, the top cap piece design has first utmost point post through-hole and second utmost point post through-hole, and utmost point post, seal cover fasten on the top cap piece through the injection molding to connect electric core tab through the weld ring of utmost point post below, realize the electricity connection function.
Most of the existing injection molding of the pole of the power battery is to fill thermoplastic materials in gaps between the pole and the top cover sheet, and the strength of an injection molding part is obviously weaker than that of a metal part, so that the injection molding part becomes a weak part of an assembly structure, and the problem of breakage or damage possibly occurs, thereby influencing the reliability of the battery structure.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the top cover structure, and the structural framework is added into the injection molding body, so that the structural strength of the injection molding body part is greatly enhanced, and the reliability of the battery structure is further improved.
The utility model also provides a power battery with the top cover structure.
The top cover structure according to the embodiment of the first aspect of the utility model comprises:
the pole assembly comprises a column body and an upper bedplate, and the upper bedplate is sleeved on the column body and connected with the column body;
the top cover plate is provided with a top cover through hole, and the column body penetrates through the top cover through hole;
the injection molding body is sleeved on the periphery of the column body and arranged between the upper platen and the top cover sheet, and is used for connecting the upper platen, the column body and the top cover sheet;
the injection molding body comprises a structural framework, the structural framework comprises a plurality of supporting rods, and at least part of the structural framework is coated in the injection molding body; the structural strength of the injection molding body is greater than that of the structural framework.
The top cover structure provided by the embodiment of the utility model has at least the following beneficial effects:
through setting up structural framework in the injection molding, and at least part structural framework is by the cladding in the injection molding to greatly promoted the structural strength of injection molding, reduced the cracked or damaged problem of injection molding, and then promoted the reliability of battery structure.
According to some embodiments of the utility model, the top cover sheet is provided with a ring groove, at least part of the structural skeleton is embedded in the ring groove, and the height from the bottom of the ring groove to the upper surface of the top cover sheet is not more than two thirds of the thickness of the top cover sheet in the vertical direction.
According to some embodiments of the utility model, the structural skeleton and the injection molded body are both annular structures.
According to some embodiments of the utility model, the structural skeleton is entirely enclosed within the injection molding body, a gap between the structural skeleton and the column is not less than 0.2mm, and a gap between the structural skeleton and the upper platen is not less than 0.2mm.
According to some embodiments of the utility model, the support bar is circular or elliptical in cross-section.
According to some embodiments of the utility model, the support rod is made of a metal material or a plastic with a melting point not less than that of the injection molding material.
According to some embodiments of the utility model, the spacing between adjacent support bars is not less than 0.5mm.
According to some embodiments of the utility model, the sealing ring is arranged between the top cover piece and the outer circumferential surface of the cylinder; the lower bedplate is connected with the column body and arranged below the top cover sheet.
According to some embodiments of the utility model, an insulating plate is disposed between the lower platen and the top cover sheet.
The power battery according to the embodiment of the second aspect of the utility model comprises the top cover structure.
According to the power battery disclosed by the embodiment of the utility model, the strength of the injection molding body is improved, so that the reliability of the battery structure is improved, and the failure rate of the battery is reduced; and through setting up structural skeleton in the injection molding, and at least part structural skeleton is by cladding in the injection molding, has greatly promoted the structural strength of injection molding, has reduced the problem of fracture or damage, and then has promoted battery structure's reliability.
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 utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a top cover structure according to an embodiment of the present utility model;
FIG. 2 is a schematic view illustrating the assembly of a top cover structure according to an embodiment of the present utility model;
fig. 3 is a top view of the injection molded body of fig. 2.
Reference numerals:
a pole assembly 100, a column 110, an upper platen 120, a lower platen 130;
a top cover sheet 200, a ring groove 210, a top cover through hole 220;
injection molding body 300, structural framework 310, support rod 320;
a seal ring 400;
an insulating plate 500.
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.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Example 1
Referring to fig. 1 to 3, the top cover structure of an embodiment of the present utility model includes a pole assembly 100, a top cover sheet 200 and an injection molding body 300, wherein the top cover sheet 200 and the injection molding body 300 are mounted on the pole assembly 100, the pole assembly 100 includes a column 110 and an upper platen 120, the top cover sheet 200 is provided with a top cover through hole 220 through which the column 110 passes, and the column 110 is provided through the top cover through hole 220 of the top cover sheet 200. Specifically, the injection molding body 300 is sleeved on the periphery of the column 110, and is disposed between the top cover 200 and the upper platen 120.
The pole assembly 100 is communicated with the battery cell, the top cover sheet 200 is connected with the pole assembly 100 through the injection molding body 300, and the strength of the injection molding body 300 greatly influences the reliability of the whole battery structure because the material of the injection molding body 300 is different from that of the top cover sheet 200 and the pole assembly 100.
At present, most top cover structures, the injection molding body 300 is formed by curing injection molding materials, but the injection molding body 300 formed by curing injection molding materials is obviously weaker in structural strength and becomes a weak part in a battery structure, and in order to solve the technical problems, the structural framework 310 is added into the injection molding body 300, the structural strength of the injection molding body 300 formed by injection molding is greatly increased based on the structural framework 310, and the structural strength of the injection molding body 300 is not only greater than that of the structural framework 310, but also greater than that of the injection molding body 300 formed by injection molding materials only, so that the reliability of the battery structure is ensured.
It should be understood that the structural framework 310 may be completely embedded in the injection molding body 300 by injection molding, that is, the structural framework 310 adopts a hollowed-out design, and the injection molding material fills the interior of the structural framework 310; the structural framework 310 may be designed physically, and the injection molding material only partially coats the outer surface of the structural framework 310 or completely coats the outer surface of the structural framework 310.
In some embodiments of the present utility model, the structural skeleton 310 is preferably designed to be hollowed out, so that the injection molding 300 is formed with the highest structural strength. Since injection molding is a mature technology in the industry, an injection molding method thereof is a conventional technology, and is not described herein.
In some embodiments of the present utility model, the injection molding material used for injection molding to form the injection molded body 300 is at least one of acryl (PMMA), acrylonitrile Butadiene Styrene (ABS), nylon Polyamide (PA), polycarbonate (PC), polyethylene (PE), polyoxymethylene (POM), polypropylene (PP), polystyrene (PS), thermoplastic elastomer (TPE), thermoplastic Polyurethane (TPU). The specific materials can be selected according to the actual requirements.
Further, the structural skeleton 310 is made of a metal material or a plastic material having a melting point not less than that of an injection molding material. The metal material can be metal such as aluminum, copper, or metal oxide such as aluminum oxide, boehmite, etc.; the plastic can be high temperature resistant plastic such as polytetrafluoroethylene; the specific materials can be selected according to the actual requirements.
In some embodiments of the present utility model, referring to fig. 1 and 2, the pole assembly 100 further includes a lower platen 130, the upper platen 120 and the lower platen 130 are both mounted to the column 110, and at least one of the upper platen 120 and the lower platen 130 is fixedly connected to the column 110; the upper and lower platens 120 and 130 have a space therebetween, and the top cover sheet 200 is provided between the upper and lower platens 120 and 130.
In some embodiments of the present utility model, at least one of the upper platen 120 and the lower platen 130 is fixedly connected to the column 110, and the fixed connection may be integrally formed or welded, bolted, etc. The upper platen 120 may be fixedly connected to the column 110, the lower platen 130 may be movably sleeved on the column 110, or the lower platen 130 may be fixedly connected to the column 110, the upper platen 120 may be movably sleeved on the column 110, or both the upper platen 120 and the lower platen 130 may be fixedly connected to the column 110.
In some embodiments of the present utility model, it is preferable that both the upper platen 120 and the lower platen 130 are fixedly connected to the column 110, and that the upper platen 120 is connected to the top end of the column 110 and the lower platen 130 is connected to the bottom end of the column 110.
It is conceivable that the structural skeleton 310 is provided with a through hole through which the column 110 passes. The shape of the column 110 may be set according to practical requirements, for example, the column 110 may be cylindrical, prismatic, irregular, or the like. Correspondingly, when the column 110 adopts a cylindrical structure, the top cover through hole 220 is circular, and the through hole of the structural framework 310 is also circular; when the column 110 adopts a prismatic or irregularly shaped structure, the through holes 220 of the top cover and the through holes of the structural skeleton 310 are provided in shapes matching the column 110.
Further, if the column 110 has a cylindrical structure, the structural skeleton 310 preferably has a ring structure, and similarly, the injection molding body 300 preferably has a ring structure; if the column 110 adopts a prismatic or irregularly shaped structure, the structural skeleton 310 preferably adopts a structure similar to the column 110, and the injection molding body 300 preferably adopts a structure similar to the structural skeleton 310, so that the structural strength is ensured to the greatest extent and the cost is remarkably reduced.
In some embodiments of the present utility model, the cylinder 110 is preferably cylindrical in shape, so that the manufacturing process is easy, and the production cost is effectively reduced.
In some embodiments of the present utility model, when the upper and lower platens 120 and 130 are fixedly coupled to the column 110, the cover sheet 200 is installed by dividing the cover sheet 200 into two sections, i.e., cutting at the cover through holes 220 of the cover 200, so that the cover sheet 200 is installed between the upper and lower platens 120 and 130. Likewise, the structural framework 310 also requires that the structural framework 310 be divided into two sections at the through-hole locations in order to mount the structural framework 310 between the upper platen 120 and the lower platen 130. Alternatively, when the structural framework 310 has elastic deformability, a slit may be provided only at the through hole of the structural framework 310, without completely dividing the structural framework 310 into two parts, and the structural framework 310 may be installed between the upper and lower platens 120 and 130.
It is conceivable that if only one of the upper platen 120 and the lower platen 130 is fixedly coupled to the column 110, the top cover sheet 200 and the structural skeleton 310 need not be divided into two parts, but the column 110 may be first passed through the top cover through-hole 220 and the structural skeleton 310, and then the upper platen 120 or the lower platen 130 may be placed.
In combination with the above two ways, if the upper platen 120 and the lower platen 130 are fixedly connected with the column 110, the structural framework 310 may be clamped between the upper platen 120 and the lower platen 130, which may be more advantageous in terms of structural strength; if only one of the upper and lower platens 120 and 130 is fixedly coupled to the column 110, the installation of the roof sheet 200 and the structural backbone 310 is facilitated. In the practical use scenario of the present application, it is preferable to fixedly connect both the upper platen 120 and the lower platen 130 with the column 110.
In some embodiments of the present utility model, the injection molding body 300 is made by filling the injection molding material into the structural skeleton 310, so that the connection process of the top cover sheet 200 and the pole assembly 100 is as follows:
step one, mounting the top cover sheet 200 between the upper platen 120 and the lower platen 130;
step two, installing a structural framework 310 between the upper platen 120 and the top cover sheet 200;
thirdly, building a mold on the periphery of the structural framework 310, and pouring injection molding materials into the mold;
and step four, after the injection molding material is cooled and hardened, the mold is disassembled to obtain an injection molding body 300, and the connection of the top cover piece 200 and the pole assembly 100 is completed.
In some embodiments of the present utility model, at least a portion of the structural skeleton 310 is covered in the injection molding body 300, that is, when the structural skeleton 310 is annular, it may be the case that the outer ring of the structural skeleton 310 is exposed out of the injection molding body 300, or the inner ring of the structural skeleton 310 is exposed out of the injection molding body 300, or the upper surface of the structural skeleton 310 is exposed out of the injection molding body 300, or both the upper surface of the structural skeleton 310 and the inner ring are exposed out of the injection molding body 300, or both the outer ring and the inner ring of the structural skeleton 310 are exposed out of the injection molding body 300, or the structural skeleton 310 is completely covered in the injection molding body 300. Since the structural frame 310 needs to be first placed on the top cover sheet 200 at the time of installation, there is no gap between the structural frame 310 and the top cover sheet 200 at the time of injection molding, that is, it is difficult to form a case where the lower surface of the structural frame 310 is exposed to the injection molded body 300.
In some embodiments of the present utility model, the structural framework 310 is preferably completely encapsulated in the injection molding body 300, and the gap between the structural framework 310 and the column 110 is not less than 0.2mm, and the gap between the structural framework 310 and the upper platen 120 is not less than 0.2mm. That is, the injection molding material of not less than 0.2mm is filled between the inner ring of the structural skeleton 310 and the column 110, and the injection molding material of not less than 0.2mm is filled between the upper surface of the structural skeleton 310 and the upper platen 120. The injection molding material is filled between the inner ring of the structural framework 310 and the column 110 and the injection molding material is filled between the upper surface of the structural framework 310 and the upper platen 120, so that the injection molding body 300 is insulated from the battery cell, and meanwhile, the injection molding material with the thickness of not less than 0.2mm is filled between the inner ring of the structural framework 310 and the column 110 and the injection molding material with the thickness of not less than 0.2mm is filled between the structural framework 310 and the upper platen 120, so that the injection molding effect can be ensured, the surface of the injection molding body 300 is smooth, and the structural strength is good and is not easy to damage.
It should be appreciated that, in order to ensure that the injection molding material is filled between the inner ring of the structural framework 310 and the column 110 after the injection molding is completed and the injection molding material is filled between the upper surface of the structural framework 310 and the upper platen 120, when the structural framework 310 is installed, the stability of the column 110 needs to be ensured by means of an external force, and at the same time, a gap of not less than 0.2mm is provided between the inner ring of the structural framework 310 and the outer circumferential surface of the column 110, and a gap of not less than 0.2mm is provided between the upper surface of the structural framework 310 and the upper platen 120 after the structural framework 310 is installed on the column 110. That is, after the structural skeleton 310 is mounted on the pole assembly 100, the structural skeleton 310 does not come into contact with the pole assembly 100.
In some embodiments of the present utility model, if the structural framework 310 is mounted on the pole assembly 100, the structural framework 310 contacts the pole assembly 100, and the structural framework 310 is made of metal, then the structural framework 310 is conducted with the battery core, at this time or just when the injection molding body 300 does not completely cover the structural framework 310, then the whole top cover structure at the positive electrode or the negative electrode of the power battery can conduct electricity, which has a certain risk, but only one of the positive electrode and the negative electrode of the same power battery is guaranteed to have a conducting effect, so that the use is not affected.
In some embodiments of the present utility model, the structural framework 310 includes a plurality of support rods 320. Specifically, referring to fig. 3, the structural framework 310 is formed by splicing a plurality of support rods 320, or is formed by constructing a plurality of support rods 320, so that a hollow structural framework 310 can be formed.
In some embodiments of the present utility model, the cross section of the support rod 320 is circular or elliptical. Specifically, the support rod 320 is configured to have a circular or oval cross section, so that injection molding material can flow in the structural framework 310 during injection molding, thereby reducing air bubbles generated during injection molding, further reducing the probability of cracking or air bubbles generated by the injection molding body 300, and improving the structural strength of the injection molding body 300.
Further, it is preferable to polish and polish at least part of the surfaces of the support bars 320 located at the outer ring and the inner ring of the structural frame 310 to further increase the speed at which the injection molding material flows on the part of the support bars 320 located at the outer ring or the inner ring of the structural frame 310 during injection molding.
In some embodiments of the present utility model, the interval between adjacent support bars 320 is not less than 0.5mm. Specifically, the adjacent support bars 320 refer to any one support bar 320, and the distance between the adjacent support bars 320 in the horizontal direction or the vertical direction should not be smaller than 0.5mm, because if the distance between the adjacent support bars 320 is too small, the entering of the injection molding material is affected, so that the situation that the injection molding material is not filled in a partial area in the structural framework 310 is caused, and the structural strength of the injection molding body 300 is greatly reduced.
Accordingly, the spacing between adjacent support bars 320 should not be too great, which would result in the formation of a solid block of pure injection molding material within the structural skeleton 310 that lacks support by the support bars 320, and would also greatly affect the structural strength of the injection molded body 300.
In some embodiments of the present utility model, referring to fig. 3, the structural skeleton 310 is a ring-shaped structure, and the thickness from the inner ring surface to the outer ring surface of the structural skeleton 310 is preferably not less than one fifth of the thickness of the injection molded body 300. If the thickness from the inner ring surface to the outer ring surface of the structural skeleton 310 is too small and is much smaller than the thickness between the inner ring and the outer ring of the injection molding body 300, it means that the portion from the outer ring surface of the structural skeleton 310 to the outer ring surface of the injection molding body 300 or the portion from the inner ring surface of the structural skeleton 310 to the inner ring surface of the injection molding body 300 is a structure which is supported by the support rods 320 and is formed by solidifying pure injection molding materials, and the structural strength of the portion of the injection molding body 300 which is supported by the support rods 320 is greatly reduced, so that the strength of the injection molding body 300 is affected, and bubbles are easily generated in the injection molding process, so that cracks are generated in the injection molding body 300 formed by injection molding; if the thickness from the inner ring surface to the outer ring surface of the structural framework 310 is too large, it means that the portion from the outer ring surface of the structural framework 310 to the outer ring surface of the injection molding body 300 or the portion from the inner ring surface of the structural framework 310 to the inner ring surface of the injection molding body 300 is too thin, which not only affects the insulation effect of the injection molding body 300, but also affects the structural strength of the injection molding body 300; it is therefore within a reasonable range that the thickness from the inner ring surface to the outer ring surface of the structural skeleton 310 is not less than one fifth of the thickness of the injection molded body 300.
In some embodiments of the present utility model, the top sheet 200 is provided with a ring groove 210 into which the structural backbone 310 is partially inserted, and the height from the bottom of the ring groove 210 to the upper surface of the top sheet 200 is not more than two thirds of the thickness of the top sheet 200 in the vertical direction. Specifically, referring to fig. 2, the ring groove 210 is provided to limit the structural skeleton 310, and the shape of the ring groove 210 is identical to the shape of the structural skeleton 310. Taking the structural skeleton 310 as an example of an annular structure, the annular groove 210 is circular, and then the inner diameter of the annular groove 210 is almost identical to the outer diameter of the structural skeleton 310; the inside diameter of the ring groove 210 will also change for different sized structural skeletons 310. The ring groove 210 is arranged to limit and block the structural framework 310, so that the structural framework 310 can be fixed in position, and subsequent injection molding is facilitated.
It is conceivable that if the height from the bottom of the groove 210 to the upper surface of the top cover sheet 200 is too large, the structural strength of the top cover sheet 200 is affected; if the height from the bottom of the groove 210 to the upper surface of the top cover sheet 200 is too small, it is difficult to achieve the limit effect on the structural skeleton 310.
It should be appreciated that the structural framework 310 is confined within the ring groove 210, but the outer ring of the injection molded body 300 may extend beyond the ring groove 210, and the upper surface of the injection molded body 300 may extend beyond the upper surface of the upper platen 120 or be flush with the upper surface of the upper platen 120; the upper surface of the injection molded body 300 may also be flush with the lower surface of the upper platen 120.
It will be appreciated that the top cover sheet 200 may not have the ring grooves 210 to limit the structural backbone 310, but that the ring grooves 210 are preferably provided on the top cover sheet 200.
In some embodiments of the present utility model, a sealing ring 400 is further included, and the sealing ring 400 is disposed between the cap plate 200 and the outer circumferential surface of the cylinder 110. Specifically, referring to fig. 1 and 2, the cross section of the seal ring 400 is "L", but the cross section of the seal ring 400 may be circular, rectangular, or the like.
In some embodiments of the present utility model, the seal ring 400 is made of one or more materials selected from fluororubber, nitrile rubber, silicone rubber, polyacrylate, polyurethane, etc.
In some embodiments of the present utility model, an insulating plate 500 is provided between the lower platen 130 and the top cover sheet 200, and the lower platen 130 is disposed under the insulating plate 500. Specifically, the insulating plate 500 may be made of one or more materials selected from polypropylene, polyphenylene oxide, polycarbonate, etc. to achieve an insulating effect.
Example two
Referring to fig. 1 to 3, a power cell according to another embodiment of the present utility model includes the above-described top cover structure. Specifically, the power cell also includes a housing, a battery cell, and other necessary components, with the housing and the top cover structure being assembled to form a sealed cavity for mounting the battery cell.
According to the power battery provided by the embodiment of the utility model, the strength of the injection molding body 300 is improved, so that the reliability of the battery structure is improved, and the failure rate of the battery is reduced; meanwhile, the power battery of the embodiment has the above-mentioned top cover structure, that is, has all the beneficial effects of the top cover structure, and will not be described herein.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A roof structure, comprising:
the pole assembly comprises a column body and an upper bedplate, and the upper bedplate is sleeved on the column body and connected with the column body;
the top cover plate is provided with a top cover through hole, and the column body penetrates through the top cover through hole;
the injection molding body is sleeved on the periphery of the column body and is arranged between the upper platen and the top cover sheet; the injection molding body is used for connecting the upper platen, the column body and the top cover sheet;
the injection molding body comprises a structural framework, the structural framework comprises a plurality of supporting rods, at least part of the structural framework is coated in the injection molding body, and the structural strength of the injection molding body is greater than that of the structural framework.
2. A roof structure according to claim 1, wherein: the top cover piece is provided with a ring groove, at least part of the structural framework is embedded into the ring groove, and the height from the bottom of the ring groove to the upper surface of the top cover piece is not more than two thirds of the thickness of the top cover piece in the vertical direction.
3. A roof structure according to claim 1, wherein: the structural framework and the injection molding body are of annular structures.
4. A roof structure according to claim 3, wherein: the structure framework is completely coated in the injection molding body, the gap between the structure framework and the column body is not smaller than 0.2mm, and the gap between the structure framework and the upper platen is not smaller than 0.2mm.
5. A roof structure according to claim 1, wherein: the cross section of the supporting rod is round or oval.
6. A roof structure according to claim 1, wherein: the supporting rod is made of metal materials or plastics with the melting point not less than that of injection molding materials.
7. A roof structure according to claim 1, wherein: the interval between the adjacent support rods is not less than 0.5mm.
8. A roof structure according to claim 1, wherein: the sealing ring is arranged between the top cover sheet and the outer circumferential surface of the cylinder; the lower bedplate is connected with the column body and arranged below the top cover sheet.
9. A roof structure as claimed in claim 8, wherein: an insulating plate is arranged between the lower bedplate and the top cover sheet.
10. A power cell comprising a roof structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321808103.1U CN220358206U (en) | 2023-07-10 | 2023-07-10 | Top cover structure and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321808103.1U CN220358206U (en) | 2023-07-10 | 2023-07-10 | Top cover structure and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220358206U true CN220358206U (en) | 2024-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321808103.1U Active CN220358206U (en) | 2023-07-10 | 2023-07-10 | Top cover structure and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220358206U (en) |
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2023
- 2023-07-10 CN CN202321808103.1U patent/CN220358206U/en active Active
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