CN220042159U - Lithium battery PACK upper cover and energy storage battery box - Google Patents
Lithium battery PACK upper cover and energy storage battery box Download PDFInfo
- Publication number
- CN220042159U CN220042159U CN202321497441.8U CN202321497441U CN220042159U CN 220042159 U CN220042159 U CN 220042159U CN 202321497441 U CN202321497441 U CN 202321497441U CN 220042159 U CN220042159 U CN 220042159U
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- battery pack
- cover
- end cover
- rear end
- upper cover
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 238000004146 energy storage Methods 0.000 title claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
The utility model provides a PACK upper cover of a lithium battery and an energy storage battery box. The lithium battery PACK upper cover comprises a front end cover, a rear end cover and an upper cover main body, wherein the front end cover is used for being connected with one end of the bottom plate, the rear end cover is connected with the other end of the bottom plate, a front end lap joint groove is formed on one end side, adjacent to the rear end cover, of the front end cover, and a rear end lap joint groove is formed on one end side, adjacent to the front end cover, of the rear end cover; the inner walls at the two ends of the upper cover main body are respectively abutted against the inner wall of the front end lap joint groove and the inner wall of the rear end lap joint groove, and the two sides of the upper cover main body are connected with the bottom plate, so that a battery PACK accommodating cavity is formed between the lithium battery PACK upper cover and the bottom plate. Through setting up the lithium cell PACK upper cover to the structure of syllogic separation, provide sufficient operating space for the encapsulation of group battery for the assembly of group battery is comparatively convenient, improves the assembly efficiency of group battery.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a PACK upper cover of a lithium battery and an energy storage battery box.
Background
With the rapid development of lithium battery technology, the industry is increasingly paying attention to battery PACK technology, and battery PACK generally refers to packaging, packaging and assembling battery cells to form a finished battery for practical use.
At present, the lithium battery PACK box on the market is fixed in the width direction, the size of the lithium battery PACK box in the length direction is generally adjusted according to the needs of customers, and generally varies between 1060mm and 1400mm, therefore, the existing lithium battery PACK box adopts the following two modes:
1. firstly, manufacturing a plurality of cover plates by a sheet metal bending means, then welding the cover plates to form an upper cover, and finally connecting the upper cover with a bottom plate;
2. the whole upper cover is integrally formed, and then the upper cover is connected with the bottom plate.
Both of the above approaches can meet PACK operation of the battery, however, the above approaches still have the following problems:
(1) In the mode 1, more operation procedures exist, so that the assembly efficiency of the upper cover and the bottom plate is lower, and the upper cover formed by welding has smaller operable space when the battery is assembled, so that the battery is very inconvenient to assemble;
(2) The upper cover in the mode 2 is of an integrated structure, so that the problem of small operation space of the upper cover is also caused when the battery is assembled, and the battery is inconvenient to assemble; in addition, when used for assembling batteries of different sizes, it is necessary to develop different molds to produce the upper cover, and thus, the upper cover produced in mode 2 is poor in versatility, increasing the production cost of the upper cover.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the lithium battery PACK upper cover and the energy storage battery box which are provided with the three-section separated structure, so that enough operation space is provided for packaging of a battery PACK, and the battery PACK is conveniently assembled.
The aim of the utility model is realized by the following technical scheme:
the lithium battery PACK upper cover comprises a front end cover, a rear end cover and an upper cover main body, wherein the front end cover is used for being connected with one end of a bottom plate, the rear end cover is connected with the other end of the bottom plate, a front end lap joint groove is formed on one end side, adjacent to the rear end cover, of the front end cover, and a rear end lap joint groove is formed on one end side, adjacent to the front end cover, of the rear end cover; the inner walls at the two ends of the upper cover main body are respectively abutted with the inner wall of the front end lap joint groove and the inner wall of the rear end lap joint groove, and the two sides of the upper cover main body are connected with the bottom plate, so that a battery PACK accommodating cavity is formed between the lithium battery PACK upper cover and the bottom plate.
In one embodiment, the front end cover and the rear end cover are both injection molded pieces, and the upper cover body is an extrusion molded piece.
In one embodiment, the front end cap is removably attached to the base plate, the rear end cap is removably attached to the base plate, and the upper cover body is removably attached to the base plate.
In one embodiment, the lithium battery PACK upper cover further comprises a fastening assembly, the fastening assembly comprises a first fastening piece, a second fastening piece and a third fastening piece, the front end cover is formed with a first mounting via hole, the rear end cover is formed with a second mounting via hole, the upper cover main body is formed with a third mounting via hole, and the bottom plate is respectively formed with a first screw hole, a second screw hole and a third screw hole; the first fastener penetrates through the first mounting via hole and is connected with the inner wall of the first threaded hole, the second fastener penetrates through the second mounting via hole and is connected with the inner wall of the second threaded hole, and the third fastener penetrates through the third mounting via hole and is connected with the inner wall of the third threaded hole.
In one embodiment, the first fastener includes a first bolt and a first nut, where the first bolt sequentially penetrates through the first nut, the first mounting via hole and is connected with the inner wall of the first screw hole; the second fastener comprises a second bolt and a second nut, and the second bolt sequentially penetrates through the second nut, the second mounting through hole and is connected with the inner wall of the second threaded hole; the third fastener comprises a third bolt and a third nut, and the third bolt sequentially penetrates through the third nut, the third mounting through hole and the inner wall of the third threaded hole.
In one embodiment, the upper cover body includes an integrally formed first folded side plate, a cover plate and a second folded side plate, the first folded side plate is provided with a first folded edge portion, the second folded side plate is provided with a second folded edge portion, and the first folded edge portion and the second folded edge portion are all distributed with a plurality of third mounting via holes.
In one embodiment, the front end cover has a height equal to the height of the upper cover body, and the rear end cover has a height equal to the height of the front end cover.
In one embodiment, the front end cover is provided with a plurality of limiting holes, each limiting hole is communicated with the battery pack accommodating cavity, and each limiting hole is used for penetrating a fastening screw; the front end cover is further provided with a plurality of protection concave stations, the protection concave stations and the limiting holes are arranged in one-to-one correspondence, and the protection concave stations are arranged around the corresponding limiting holes.
In one embodiment, a lead port is formed on an end side of the front end cover facing away from the rear end cover, and the lead port communicates with the battery pack accommodating chamber.
An energy storage battery box comprising a base plate and a lithium battery PACK top cover as described in any of the above embodiments.
Compared with the prior art, the utility model has the following advantages:
1. the lithium battery PACK upper cover is split into the front end cover, the upper cover main body and the rear end cover, and is set to be of a three-section separated structure, so that enough operation space is provided in the process of packaging the battery PACK, the battery PACK is assembled conveniently, and the assembly efficiency of the battery PACK is improved;
2. when the length of the battery pack to be packaged is changed, the front end cover and the rear end cover are used as universal parts, so that the battery pack is applicable to battery packs with different sizes only by changing the length of the upper cover main body, the utilization rate of the front end cover and the rear end cover is improved, the development of a die is reduced, and the production resources are saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a PACK top cover of a lithium battery according to an embodiment;
fig. 2 is an exploded view of the PACK top cover of the lithium battery shown in fig. 1;
fig. 3 is a schematic structural view of a fastening assembly in a PACK top cover of the lithium battery shown in fig. 1.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The utility model provides a lithium battery PACK upper cover, which comprises a front end cover, a rear end cover and an upper cover main body, wherein the front end cover is used for being connected with one end of a bottom plate; the inner walls at the two ends of the upper cover main body are respectively abutted with the inner wall of the front end lap joint groove and the inner wall of the rear end lap joint groove, and the two sides of the upper cover main body are connected with the bottom plate, so that a battery PACK accommodating cavity is formed between the lithium battery PACK upper cover and the bottom plate.
In order to better understand the technical scheme and beneficial effects of the present utility model, the following describes the present utility model in further detail with reference to specific embodiments:
referring to fig. 1 and 2, which show a PACK top cover 10 for a lithium battery according to an embodiment of the present utility model, the PACK top cover 10 for a lithium battery includes a front end cover 100, a rear end cover 200 and a top cover main body 300, the front end cover 100 is used for being connected with one end of a bottom plate 20, the rear end cover 200 is connected with the other end of the bottom plate 20, a front end overlapping groove 101 is formed on one end side of the front end cover 100 adjacent to the rear end cover 200, and a rear end overlapping groove 201 is formed on one end side of the rear end cover 200 adjacent to the front end cover 100; the inner walls at the two ends of the upper cover main body 300 are respectively abutted against the inner wall of the front end lap joint groove 101 and the inner wall of the rear end lap joint groove 201, and the two sides of the upper cover main body 300 are connected with the bottom plate 20, so that a battery PACK accommodating cavity 11 is formed between the lithium battery PACK upper cover 10 and the bottom plate 20.
In this embodiment, when packaging the battery pack, the front end cover 100 is connected to one end of the bottom plate 20, then the battery pack is placed on the bottom plate 20, and then the rear end cover 200 is connected to the other end of the bottom plate 20, and both ends of the battery pack are limited and fixed through the front end cover 100 and the rear end cover 200; at this time, an operation space is provided between the front end cover 100 and the rear end cover 200, so that the assembly position of the battery pack can be adjusted; since the front end cover 100 is formed with the front end lap groove 101 adjacent to the rear end cover 200 at one side thereof, and the rear end cover 200 is formed with the rear end lap groove 201 adjacent to the front end cover 100, the battery PACK package is accommodated in the battery PACK accommodation chamber 11 by abutting the inner walls of both ends of the upper cover body 300 with the inner walls of the front end lap groove 101 and the inner walls of the rear end lap groove 201, respectively, and connecting both sides of the upper cover body 300 with the bottom plate 20, respectively, thereby forming the battery PACK accommodation chamber 11 between the lithium battery PACK upper cover 10 and the bottom plate 20. It can be understood that the operation of assembling the PACK top cover 10 of the lithium battery is achieved by abutting both ends of the top cover main body 300 against the front end cover 100 and the rear end cover 200, respectively, so that the length of the PACK top cover 10 of the lithium battery is the sum of the lengths of the three along the connecting direction of the front end cover 100, the top cover main body 300 and the rear end cover 200; thus, when the length of the battery PACK to be packaged is changed, the lengths of the lithium battery PACK upper cover 10 need to be correspondingly adjusted, and at this time, the front end cover 100 and the rear end cover 200 can be universal members, namely, a corresponding mold is developed for the front end cover 100 and the rear end cover 200 respectively, and the lengths of the lithium battery PACK upper cover 10 need only be adjusted by changing the lengths of the upper cover main body 300, so that the lithium battery PACK upper cover is suitable for battery PACKs with different sizes, the utilization rate of the front end cover 100 and the rear end cover 200 serving as the universal members is improved, the development of the mold is reduced, and the production resources are saved.
In this embodiment, the lithium battery PACK upper cover 10 is split into the front end cover 100, the upper cover main body 300 and the rear end cover 200, and by arranging the lithium battery PACK upper cover 10 in a three-stage separated structure, a sufficient operation space is provided for packaging the battery PACK, so that the assembly of the battery PACK is convenient, and the assembly efficiency of the battery PACK is improved; when the length of the battery pack to be packaged is changed, the front end cover 100 and the rear end cover 200 are used as general members, so that the battery pack can be applied to different sizes by changing the length of the upper cover main body 300, thereby improving the utilization rate of the front end cover 100 and the rear end cover 200, reducing the development of the mold, and saving the production resources.
In one embodiment, referring to fig. 2, the front end cover 100 and the rear end cover 200 are both injection molded parts, and the upper cover body 300 is an extrusion molded part. In this way, the productivity of the front end housing 100 and the rear end housing 200 is improved, and the length of the upper cover main body 300 is easily adjusted according to actual needs.
In one embodiment, referring to fig. 1 and 2, the front end cover 100 is detachably connected to the base plate 20, the rear end cover 200 is detachably connected to the base plate 20, and the upper cover body 300 is detachably connected to the base plate 20. In this way, the front end cover 100, the rear end cover 200, and the upper cover main body 300 can be easily attached to and detached from the base plate 20.
Further, referring to fig. 1 to 3, the lithium battery PACK top cover 10 further includes a fastening assembly 400, the fastening assembly 400 includes a first fastening member 410, a second fastening member 420, and a third fastening member 430, the front end cover 100 is formed with a first mounting via 102, the rear end cover 200 is formed with a second mounting via 202, the top cover body 300 is formed with a third mounting via 301, and the bottom plates are respectively formed with a first screw hole 21, a second screw hole 22, and a third screw hole 23; the first fastening member 410 is disposed through the first mounting via hole 102 and is connected to the inner wall of the first threaded hole 21, the second fastening member 420 is disposed through the second mounting via hole 202 and is connected to the inner wall of the second threaded hole 22, and the third fastening member 430 is disposed through the third mounting via hole 301 and is connected to the inner wall of the third threaded hole 23.
Still further, referring to fig. 3, the first fastener 410 includes a first bolt 412 and a first nut 414, where the first bolt 412 sequentially passes through the first nut 414, the first mounting via 102 and is connected to the inner wall of the first threaded hole 21; the second fastening piece 420 includes a second bolt 422 and a second nut 424, where the second bolt 422 sequentially penetrates through the second nut 424, the second mounting via 202, and is connected to the inner wall of the second threaded hole 22; the third fastening member 430 includes a third bolt 432 and a third nut 434, where the third bolt 432 sequentially penetrates through the third nut 434, the third mounting via 301, and is connected to the inner wall of the third threaded hole 23.
In one embodiment, referring to fig. 2, the upper cover main body 300 includes a first folded side plate 310, a cover plate 320 and a second folded side plate 330 that are integrally formed, the first folded side plate 310 is provided with a first folded edge portion 312, the second folded side plate 330 is provided with a second folded edge portion 332, and the first folded edge portion 312 and the second folded edge portion 332 are respectively distributed with a plurality of third mounting vias 301. In the present embodiment, the first folded side plate 310, the cover plate 320 and the second folded side plate 330 are integrally formed, so that the structural strength of the upper cover main body 300 is high; the first folded side plate 310 is provided with a first folded edge portion 312, the second folded side plate 330 is provided with a second folded edge portion 332, the first folded edge portion 312 and the second folded edge portion 332 are respectively distributed with a plurality of third mounting via holes 301, it can be understood that a plurality of third threaded holes 23 are distributed on two sides of the bottom plate 20, the plurality of third threaded holes 23 are arranged in one-to-one correspondence with the plurality of third mounting via holes 301, and each third fastener 430 is inserted into the corresponding third mounting via hole 301 and connected with the inner wall of the corresponding third threaded hole 23, so that the first folded edge portion 312 and the second folded edge portion 332 are respectively in threaded connection with the bottom plate 20, thereby enabling the upper cover main body 300 to be fixedly mounted on the bottom plate 20.
In one embodiment, referring to fig. 1, the front end cover 100 has the same height as the upper cover body 300, and the rear end cover 200 has the same height as the front end cover 100. It can be appreciated that the upper cover 10 is more beautiful due to the equal heights of the front end cover 100, the upper cover main body 300 and the rear end cover 200 when they are mounted.
In one embodiment, referring to fig. 2, the front end cover 100 is provided with a plurality of limiting holes 103, each limiting hole 103 is communicated with the battery pack accommodating cavity 11, and each limiting hole 103 is used for penetrating a fastening screw (not shown); the front end cover 100 is further formed with a plurality of protection concave stations 104, the protection concave stations 104 and the limit holes 103 are arranged in a one-to-one correspondence, and the protection concave stations 104 are arranged around the corresponding limit holes 103. In this embodiment, when the battery pack is accommodated in the battery pack accommodating cavity 11, since the front end cover 100 is provided with the plurality of limiting holes 103, fastening screws are threaded through the limiting holes 103, and the plurality of fastening screws are used for limiting and fixing the battery pack, so as to avoid the situation that the battery pack shifts and shakes during transportation. In addition, by providing a plurality of protection concave stations 104, each protection concave station 104 is used for protecting the corresponding limit hole 103 so as to avoid damage to the limit hole 103.
In one embodiment, referring to fig. 1, a lead opening 105 is formed at an end side of the front end cover 100 facing away from the rear end cover 200, and the lead 105 communicates with the battery pack accommodating chamber 11. In the present embodiment, since the front end cap 100 is formed with the lead port 105 at a side facing away from the rear end cap 200, the lead port 105 communicates with the battery pack accommodating chamber 11, and the electrode leads of the battery pack are electrically connected with the external connection member through the lead port 105.
The utility model also provides an energy storage battery box, which comprises a bottom plate and the lithium battery PACK upper cover according to any embodiment.
Compared with the prior art, the utility model has the following advantages:
1. the lithium battery PACK upper cover is split into the front end cover, the upper cover main body and the rear end cover, and is set to be of a three-section separated structure, so that enough operation space is provided in the process of packaging the battery PACK, the battery PACK is assembled conveniently, and the assembly efficiency of the battery PACK is improved;
2. when the length of the battery pack to be packaged is changed, the front end cover and the rear end cover are used as universal parts, so that the battery pack is applicable to battery packs with different sizes only by changing the length of the upper cover main body, the utilization rate of the front end cover and the rear end cover is improved, the development of a die is reduced, and the production resources are saved.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A lithium battery PACK top cover, comprising:
the lithium battery PACK upper cover comprises a front end cover, a rear end cover and an upper cover main body, wherein the front end cover is used for being connected with one end of a bottom plate, the rear end cover is connected with the other end of the bottom plate, a front end lap joint groove is formed on one end side, adjacent to the rear end cover, of the front end cover, and a rear end lap joint groove is formed on one end side, adjacent to the front end cover, of the rear end cover; the inner walls at the two ends of the upper cover main body are respectively abutted with the inner wall of the front end lap joint groove and the inner wall of the rear end lap joint groove, and the two sides of the upper cover main body are connected with the bottom plate, so that a battery PACK accommodating cavity is formed between the lithium battery PACK upper cover and the bottom plate.
2. The lithium battery PACK top cover according to claim 1, wherein the front end cover and the rear end cover are both injection molded parts, and the top cover body is an extrusion molded part.
3. The lithium battery PACK top cover of claim 1, wherein the front end cap is removably attached to the base plate, the rear end cap is removably attached to the base plate, and the top cover body is removably attached to the base plate.
4. The lithium battery PACK top cover according to claim 3, further comprising a fastening assembly, wherein the fastening assembly comprises a first fastening piece, a second fastening piece and a third fastening piece, the front end cover is formed with a first mounting via hole, the rear end cover is formed with a second mounting via hole, the top cover body is formed with a third mounting via hole, and the bottom plate is formed with a first screw hole, a second screw hole and a third screw hole, respectively; the first fastener penetrates through the first mounting via hole and is connected with the inner wall of the first threaded hole, the second fastener penetrates through the second mounting via hole and is connected with the inner wall of the second threaded hole, and the third fastener penetrates through the third mounting via hole and is connected with the inner wall of the third threaded hole.
5. The lithium battery PACK upper cover of claim 4, wherein the first fastener comprises a first bolt and a first nut, the first bolt sequentially penetrating through the first nut, the first mounting via hole and being connected with an inner wall of the first screw hole; the second fastener comprises a second bolt and a second nut, and the second bolt sequentially penetrates through the second nut, the second mounting through hole and is connected with the inner wall of the second threaded hole; the third fastener comprises a third bolt and a third nut, and the third bolt sequentially penetrates through the third nut, the third mounting through hole and the inner wall of the third threaded hole.
6. The PACK top cover of claim 4, wherein the top cover body comprises a first folded side plate, a cover plate and a second folded side plate which are integrally formed, the first folded side plate is provided with a first folded edge portion, the second folded side plate is provided with a second folded edge portion, and the first folded edge portion and the second folded edge portion are uniformly distributed with a plurality of third mounting through holes.
7. The lithium battery PACK top cover according to claim 1, wherein the front end cover has a height equal to the top cover body and the rear end cover has a height equal to the front end cover.
8. The lithium battery PACK upper cover according to claim 1, wherein the front end cover is provided with a plurality of limiting holes, each limiting hole is communicated with the battery PACK accommodating cavity, and each limiting hole is used for penetrating a fastening screw; the front end cover is further provided with a plurality of protection concave stations, the protection concave stations and the limiting holes are arranged in one-to-one correspondence, and the protection concave stations are arranged around the corresponding limiting holes.
9. The lithium battery PACK top cover according to claim 1, wherein a lead port is formed at an end side of the front end cover facing away from the rear end cover, the lead port being in communication with the battery PACK accommodating chamber.
10. An energy storage battery box, characterized by comprising a bottom plate and a lithium battery PACK top cover according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497441.8U CN220042159U (en) | 2023-06-12 | 2023-06-12 | Lithium battery PACK upper cover and energy storage battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497441.8U CN220042159U (en) | 2023-06-12 | 2023-06-12 | Lithium battery PACK upper cover and energy storage battery box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220042159U true CN220042159U (en) | 2023-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321497441.8U Active CN220042159U (en) | 2023-06-12 | 2023-06-12 | Lithium battery PACK upper cover and energy storage battery box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220042159U (en) |
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2023
- 2023-06-12 CN CN202321497441.8U patent/CN220042159U/en active Active
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