CN220138504U - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN220138504U CN220138504U CN202223015700.7U CN202223015700U CN220138504U CN 220138504 U CN220138504 U CN 220138504U CN 202223015700 U CN202223015700 U CN 202223015700U CN 220138504 U CN220138504 U CN 220138504U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- flange
- flange edge
- overflow
- gluing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 35
- 239000000565 sealant Substances 0.000 claims abstract description 31
- 239000003292 glue Substances 0.000 claims description 61
- 238000003892 spreading Methods 0.000 claims description 45
- 238000005452 bending Methods 0.000 claims description 19
- 230000002265 prevention Effects 0.000 claims 2
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
Abstract
The utility model provides a battery pack, which comprises a first cover body, a second cover body and a gluing anti-overflow structure; the first cover body and the second cover body form an accommodating space; the opening of the first cover body extends outwards to form a first flange edge, and the opening of the second cover body extends outwards to form a second flange edge; the gluing anti-overflow structure is arranged between the first flange edge and the second flange edge, and sealant is arranged in the gluing anti-overflow structure. The joint of the flange edges of the first cover body and the second cover body in the battery pack is sealed by the sealant, so that the cost is low and the efficiency is high.
Description
Technical Field
The utility model relates to the technical field of battery packaging, in particular to a battery pack.
Background
At present, with the rapid development of battery pack technology, the performance requirements of battery pack sealing are also higher and higher, and the following problems exist in the conventional battery pack sealing ring: (1) the cost is high; (2) the installation is easy to damage and the installation efficiency is low.
Therefore, how to solve the problems of high cost and low installation efficiency of the existing battery package has become one of the problems to be solved by those skilled in the art.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present utility model and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the utility model section.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a battery pack for solving the problems of high cost and low installation efficiency of the battery pack package in the prior art.
To achieve the above and other related objects, the present utility model provides a battery pack comprising: the first cover body, the second cover body and the gluing anti-overflow structure;
the first cover body and the second cover body form an accommodating space; the opening of the first cover body extends outwards to form a first flange edge, and the opening of the second cover body extends outwards to form a second flange edge;
the gluing anti-overflow structure is arranged between the first flange edge and the second flange edge, and sealant is arranged in the gluing anti-overflow structure.
Optionally, the glue spreading and overflowing preventing structure comprises at least two glue spreading and overflowing preventing strips, and the glue spreading and overflowing preventing strips are respectively arranged at two sides of the first flange edge or the second flange edge; any two glue spreading overflow preventing strips and flange edges form a glue spreading groove; and sealant is arranged in the gluing groove.
Optionally, the glue spreading overflow preventing structure comprises a glue spreading groove arranged on the second flange edge; a boss is arranged at the corresponding position of the first flange edge and the gluing groove, and protrudes towards the second flange edge; the boss is embedded into the gluing groove; and sealant is arranged in the gluing groove.
Optionally, the first flange edge and/or the second flange edge further comprises a limiting structure, and the limiting structure is used for limiting movement of the glue spreading overflow preventing strip.
Optionally, the limiting structure is a limiting groove, and the limiting groove is matched with the gluing anti-overflow strip.
More optionally, the first flange edge and the second flange edge are connected through a fastening connection piece, and the fastening connection piece is located between the two glue spreading anti-overflow strips.
More optionally, the fastening connection piece comprises a rivet nut and a screw; the rivet nut penetrates through and is in press connection with the first flange edge or the second flange edge, and the thickness of the cap edge of the rivet nut is consistent with the thickness of the sealant.
More optionally, the diameter of the brim of the blind rivet nut is greater than the diameter of the mounting hole of the screw; the thickness of the cap edge of the rivet nut is smaller than or equal to the thickness of the gluing anti-overflow strip.
Optionally, a first bending part is arranged on one side of the first flange edge away from the first cover body.
Optionally, a second bending portion is disposed on a side, away from the second cover, of the second flange, and the second bending portion is matched with the first bending portion.
As described above, the battery pack of the present utility model has the following advantageous effects:
the first flange edge in the first cover body and the second flange edge in the second cover body of the battery pack are sealed by adopting the sealant, and the battery pack is not required to be sealed by a sealing ring, so that the battery pack is low in installation cost and high in efficiency.
Drawings
Fig. 1 is a schematic view showing the overall external appearance of a battery pack according to an embodiment of the present utility model.
Fig. 2 is a schematic structural view of a second cover according to an embodiment of the utility model.
Fig. 3 is a schematic view showing a flange structure of a second cover according to an embodiment of the utility model.
Fig. 4 is a schematic side view of a glue spreading and overflow preventing structure according to an embodiment of the utility model.
Fig. 5 is a schematic cross-sectional view of another glue spreading and overflowing preventing structure according to an embodiment of the present utility model.
Fig. 6 is a schematic cross-sectional view of still another glue spreading and overflowing preventing structure according to an embodiment of the present utility model.
Description of element reference numerals
1. First cover body
11. First flange edge
111. Platform
112. First bending part
113. Boss
2. Second cover body
21. Second flange edge
211. Second bending part
212. Gluing groove
3. Glue-coated overflow-preventing strip
4. Fastening connector
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.
Referring to fig. 1 to 6, it should be noted that the schematic drawings provided in this embodiment are only for illustrating the basic concept of the present utility model, and only the components related to the present utility model are shown in the drawings, and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
Example 1
The present embodiment provides a battery pack including: the first cover body 1, the second cover body 2 and the gluing anti-overflow structure.
As shown in fig. 1, the first cover 1 and the second cover 2 form an accommodating space.
Specifically, as shown in fig. 2 to 5, the opening of the first cover 1 extends outwards to form a first flange 11, and the opening of the second cover 2 extends outwards to form a second flange 21; when the first cover body 1 and the second cover body 2 are covered, the first flange edge 11 and the second flange edge 21 are in fit connection to form an accommodating space for accommodating a battery module or a battery cell group. As an example, the first cover 1 and the second cover 2 are made of steel, aluminum or composite materials, which are not limited herein; the manufacturing materials of the first cover 1 and the second cover 2 may be selected according to the use environment, which is not described in detail herein.
As an example, the first cover 1 is an upper cover, and the second cover 2 is a lower cover. The cross section of the first flange 11 is in an "L" shape, the cross section of the second flange 21 is in an "L" shape, and the first flange 11 and the second flange 21 are assembled (fit together) in a matching manner. In this embodiment, one side of the "L" is a cover body, the other side is an extended platform 111, and the extended platform of the first flange 11 and the extended platform of the second flange 21 may be attached together, so as to facilitate sealing the battery module or the battery cell group; as an example, the platform 111 is perpendicular to the cover body, and in actual production, the angle between the flange-side extending platform 111 and the cover body is not limited, so long as the two flange-side platforms can be attached together.
As an example, as shown in fig. 4 and fig. 5, a first bending portion 112 is disposed on a side of the first flange 11 away from the first cover 1, a setting direction of the first bending portion 112 is not limited, and the first cover 1 and the second cover 2 are tightly attached by the bending portion, so as to realize better sealing; the first bending portion 112 may be formed in a direction of bending the second cover 2, thereby further improving the waterproof function of the battery pack.
Preferably, a second bending portion 211 is further disposed on a side of the second flange edge 21 away from the second cover 2, and the second bending portion 211 is matched with the first bending portion 112, so that displacement between the first flange edge 11 and the second flange edge 21 can be avoided by the two bending portions, and tightness between the first flange edge 11 and the second flange edge 21 is increased. In this embodiment, the length of the extension platform 111 of the first flange 11 is greater than the length of the extension platform 111 of the second flange 21, and the height of the first bending portion 112 of the extension platform 111 of the first flange 11 is greater than the first bending portion 112 of the extension platform 111 of the second flange 21, so that when both the first bending portions 112 are downward, they can be bonded together, thereby improving the sealing performance.
As shown in fig. 2 and 3, which are schematic diagrams of the flange structure of the second cover 2, the glue-spreading and overflow-preventing structure is disposed between the first flange 11 and the second flange 21; in this embodiment, the glue spreading and overflow preventing structure is disposed on the second flange edge 21 (on the lower cover), and the glue spreading and overflow preventing structure may also be disposed on the first flange edge 11 (when glue spreading, the opening of the first cover 1 needs to be placed on the workbench upwards at this time, so that glue spreading is convenient), which is not limited herein. In this embodiment, the first cover 1 and the second cover 2 are connected and sealed by providing a glue coating structure between the first flange 11 and the second flange 21.
The glue spreading and overflowing preventing structure can be a glue spreading groove arranged on the first flange edge and/or the second flange edge, and the sealant is injected into the glue spreading groove to realize the sealing of the battery pack.
Specifically, the glue spreading and overflowing preventing structure comprises two glue spreading and overflowing preventing strips 3, and the two glue spreading and overflowing preventing strips 3 are respectively arranged at two sides (two sides of the platform 111) of the first flange edge 11 or the second flange edge 21; in this embodiment, two glue spreading anti-overflow strips 3 are respectively disposed on two sides of the second flange edge 21. As an example, the glue-coated anti-overflow strip 3 is an anti-static anti-overflow strip, so as to improve the safety performance of the battery pack; as an example, the glue-coated anti-overflow strip 3 is made of foaming materials, and has high stability. As an example, the glue strip 3 has a rectangular cross section, so that the glue strip 3 can be mounted or glued on the first flange 11 or the second flange 21. The cross section of the gluing anti-overflow strip 3 can also be in other shapes such as a circle, a triangle and the like, so long as two gluing anti-overflow strips 3 can limit the sealant and prevent overflow.
In particular, the first flange 11 and/or the second flange 21 further comprise a limiting structure for limiting the movement of the glue spreading spill-preventing strip 3. As an example, the limiting structure is a limiting groove (not shown in the figure), and the limiting groove is matched with the glue spreading anti-overflow strip 3. In this embodiment, the glue spreading anti-overflow structure is disposed on the second flange edge 21 (on the lower cover), and the limiting groove may be correspondingly disposed on the first flange edge 11, so that the first flange 11 and the second flange 12 are attached to each other, and the glue spreading anti-overflow strip 3 is limited. In other embodiments, the glue spreading anti-overflow strip is disposed on the second flange edge 21 (on the lower cover), and the limiting groove may be disposed on the second flange edge 21 and the first flange edge 11 correspondingly, so that the first flange 11 and the second flange 12 are attached to each other, and the glue spreading anti-overflow strip 3 is limited.
It should be noted that, the limiting structure may include, but is not limited to, a limiting groove opposite to the position of the glue spreading anti-overflow strip 3, and may further be provided with a protrusion outside the glue spreading anti-overflow strip 3 to limit the glue spreading anti-overflow strip 3, where the height of the protrusion is less than or equal to that of the glue spreading anti-overflow strip, and the groove may be set in sections, so long as the arrangement of not displacing the glue spreading anti-overflow strip 3 is ensured to belong to the protection range of the embodiment.
As shown in fig. 4, the first flange 11 and the second flange 21 are connected together, two glue spreading anti-overflow strips 3 and the flange form glue spreading grooves (two platforms 111 and two glue spreading anti-overflow strips 3), and sealant is disposed in the glue spreading grooves, so that the tightness of the battery pack is greatly improved. As an example, the sealant is a non-newtonian fluid having high tensile strength, excellent elasticity, abrasion resistance, oil resistance, and cold resistance; according to the different use environments of the battery pack, the sealant can also be waterproof, chemical-resistant and other characteristics, and the details are not repeated here.
As shown in fig. 3, the first flange 11 and the second flange 21 are further connected by a fastening connector 4, and by providing the fastening connector 4, the connection stability of the first cover 1 and the second cover 2 is improved; the number of the fastening connectors 4 is not limited, and the fastening connectors may be set according to actual needs. As an example, the fastening connection 4 is located between two glue-coated spill-proof strips 3, i.e. the fastening connection 4 is fastened by passing through two platforms 111.
Specifically, as an example, the fastening connection 4 includes a blind rivet nut and a screw; the rivet nut passes through and is in press connection with the first flange edge 11 or the second flange edge 21, and the thickness of the cap edge of the rivet nut is equal to the thickness of the sealant, so that the sealant can be better attached to the first flange edge 11 and the second flange edge 21, and the sealing is tighter; in this embodiment, the blind rivet nut passes through and is crimped on the second flange edge 21, and the first flange edge 11 is correspondingly provided with a mounting hole for the screw, and the screw passes through the mounting hole and is in threaded connection with the blind rivet nut; the thickness of the cap edge of the rivet nut is used for limiting the thickness of the sealant. As an example, the cap edge of the rivet nut is circular, and the diameter of the cap edge of the rivet nut is larger than the diameter of the mounting hole of the screw, so that the cover body can be supported. As an example, the rivet nut is of a hollow structure, and the hollow part of the rivet nut is provided with internal threads matched with the screw; the first flange 11 and the second flange 21 are connected and fastened through the screws and the rivet nuts, so that stability of the battery pack is improved. In addition, the thickness of the cap edge of the rivet nut is smaller than or equal to the thickness of the gluing anti-overflow strip. Through with the thickness setting of the cap edge of rivet nut is less than the thickness of rubber coating anti-overflow strip, in rivet nut and screw cooperation in-process, compress the thickness of rubber coating anti-overflow strip to with the thickness of the cap edge of rivet nut is unanimous, can further improve the leakproofness.
In the battery pack, the joint of the flange edges of the first cover body 1 and the second cover body 2 is sealed by adopting sealant, so that the cost is low and the installation efficiency is high.
Example two
The present embodiment provides a battery pack including: the first cover body 1, the second cover body 2 and the gluing anti-overflow structure. It should be noted that, in this embodiment, only the glue spreading and overflow preventing structure is different from the first embodiment, and the other parts are basically the same, which is not described in detail herein.
As shown in fig. 6, the glue overflow preventing structure of the present embodiment is disposed in the glue groove 212 on the second flange; a boss 113 is arranged at a corresponding position of the first flange edge, and the boss 113 protrudes towards the second flange edge; the boss 113 is embedded in the glue-spreading groove; and a sealant is arranged in the gluing groove. The glue coating groove 212 is a groove on the second flange, and the sealant is arranged in the glue coating groove 212, so that the sealant cannot flow freely in the groove due to a certain depth of the groove. In actual use, after the sealant is arranged in the groove, the boss 113 on the first flange edge is embedded into the glue coating groove 212 to be in contact with the sealant in the glue coating groove 212, the boss 113 is in contact with the sealant and extrudes the sealant to a certain extent, so that the sealant is more uniform, and an anti-overflow effect is realized. The distance between the two walls of the glue coating groove 212, the distance between the bottom ends of the two walls is smaller than the distance between the top ends of the two walls, the glue coating groove 212 forms a certain inclined angle, so that the sealant can flow into the bottom of the glue coating groove 212 during injection, and the boss 113 is easy to be embedded into the glue coating groove 212. At this time, the two walls of the boss 113 are also provided with a certain inclination, so that the matching and embedding are facilitated. When the battery pack is to be described, in actual use, the plurality of glue coating grooves 212 can be formed in the second flange according to actual sealing requirements, and the plurality of bosses 113 can be formed corresponding to the first flange, which is equivalent to the arrangement of the plurality of sealing ring layers to better seal the battery pack.
The utility model provides a battery pack, which comprises a first cover body, a second cover body and a gluing anti-overflow structure; the first cover body and the second cover body form an accommodating space; the opening of the first cover body extends outwards to form a first flange edge, and the opening of the second cover body extends outwards to form a second flange edge; the gluing anti-overflow structure is arranged between the first flange edge and the second flange edge, and sealant is arranged in the gluing anti-overflow structure. The joint of the flange edges of the first cover body and the second cover body in the battery pack is sealed by the sealant, so that the cost is low and the efficiency is high. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A battery pack, the battery pack comprising at least: the first cover body, the second cover body and the gluing anti-overflow structure;
the first cover body and the second cover body form an accommodating space; the opening of the first cover body extends outwards to form a first flange edge, and the opening of the second cover body extends outwards to form a second flange edge;
the gluing anti-overflow structure is arranged between the first flange edge and the second flange edge, and sealant is arranged in the gluing anti-overflow structure.
2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,
the gluing overflow prevention structure comprises at least two gluing overflow prevention strips which are respectively arranged at two sides of the first flange edge or the second flange edge; any two glue spreading overflow preventing strips and flange edges form a glue spreading groove; and sealant is arranged in the gluing groove.
3. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,
the gluing overflow-preventing structure comprises a gluing groove arranged on the second flange; a boss is arranged at the corresponding position of the first flange edge and the gluing groove, and protrudes towards the second flange edge;
the boss is embedded into the gluing groove; and sealant is arranged in the gluing groove.
4. The battery pack of claim 2, wherein the first flange edge and/or the second flange edge further comprises a limiting structure for limiting movement of the glue spreading spill-resistant strip.
5. The battery pack of claim 4, wherein the limiting structure is a limiting groove, and the limiting groove is matched with the glue spreading anti-overflow strip.
6. The battery pack according to claim 2, wherein: the first flange edge is connected with the second flange edge through a fastening connecting piece, and the fastening connecting piece is positioned between the two gluing anti-overflow strips.
7. The battery pack according to claim 6, wherein: the fastening connecting piece comprises a rivet nut and a screw; the rivet nut penetrates through and is in press connection with the first flange edge or the second flange edge, and the thickness of the cap edge of the rivet nut is consistent with the thickness of the sealant.
8. The battery pack according to claim 7, wherein: the diameter of the brim of the rivet nut is larger than the diameter of the mounting hole of the screw; the thickness of the cap edge of the rivet nut is smaller than or equal to the thickness of the gluing anti-overflow strip.
9. A battery pack according to any one of claims 1 to 3, wherein: a first bending part is arranged on one side of the first flange edge, which is far away from the first cover body.
10. The battery pack of claim 9, wherein a second bend is provided on a side of the second flange remote from the second cover, and the second bend matches the first bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015700.7U CN220138504U (en) | 2022-11-11 | 2022-11-11 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015700.7U CN220138504U (en) | 2022-11-11 | 2022-11-11 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220138504U true CN220138504U (en) | 2023-12-05 |
Family
ID=88956757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223015700.7U Active CN220138504U (en) | 2022-11-11 | 2022-11-11 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220138504U (en) |
-
2022
- 2022-11-11 CN CN202223015700.7U patent/CN220138504U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9190638B2 (en) | Sealing case | |
| CN206503813U (en) | Encapsulated buckle | |
| KR20170043047A (en) | a frame for connect duplex type panel | |
| CN206574842U (en) | The waterproof construction of top antenna and top antenna | |
| CN220138504U (en) | Battery pack | |
| CN202979528U (en) | Waterproof shell | |
| CN207905252U (en) | Glass roofing structure | |
| CN202834700U (en) | PVC (Poly Vinyl Chloride) board used for winding pipe | |
| CN201766788U (en) | Sealed waterproof outdoor cabinet body | |
| CN212615754U (en) | Air conditioner fan box body connecting side frame strip bushing sealing structure | |
| CN211641861U (en) | Bottom plate structure and lower shell | |
| CN206697527U (en) | Lithium battery encapsulation housing and lithium battery pack | |
| CN213767542U (en) | Double-layer co-extrusion wood-plastic profile structure | |
| CN219865832U (en) | Water pressure preventing riveting nut | |
| CN215009389U (en) | Be applied to built-in wire casing of assembled | |
| CN209165096U (en) | Oil-groove sealed lamps | |
| CN101525932B (en) | Drain plate applied to roof or wall joints | |
| CN213654010U (en) | Color contour plate with undercut type plate seam structure | |
| CN215520684U (en) | Sealing rubber strip and storage cabinet | |
| CN217420228U (en) | High leakproofness buckle that possesses moisture barrier properties | |
| CN220172257U (en) | Sealing gasket for battery pack and battery pack | |
| CN216598462U (en) | Power distribution cabinet door sealing structure | |
| CN103075401B (en) | A kind of Special-shaped Plates connects seal arrangement | |
| CN216810269U (en) | A control connection structure for box building module | |
| CN210713297U (en) | Building interior wall heated board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |