CN210270107U - Lithium battery testing device - Google Patents
Lithium battery testing device Download PDFInfo
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- CN210270107U CN210270107U CN201920823129.0U CN201920823129U CN210270107U CN 210270107 U CN210270107 U CN 210270107U CN 201920823129 U CN201920823129 U CN 201920823129U CN 210270107 U CN210270107 U CN 210270107U
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- lithium battery
- hot pressing
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- heat conducting
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Abstract
The utility model discloses a lithium battery testing arrangement is through setting up base, lift external member, high pressure external member and material layer board. In the actual application process, in the high-voltage test, as the contact head of the probe is provided with the plurality of sawtooth contact teeth, the sawtooth contact teeth can be well contacted with the pole lugs of the lithium battery in a point contact mode, compared with the existing surface contact, the sawtooth contact teeth are firmer to be contacted with the pole lugs of the lithium battery, and the accuracy of the high-voltage test cannot be influenced; in the hot pressing test, because the hot pressing external member includes two upper and lower hot pressing roof and hot pressing bottom plate, the hot pressing roof conducts the heat to the one side of rolling up the core through the roll core contact with the lithium cell on, the hot pressing bottom plate passes through the layer board with heat conduction to the another side of rolling up the core, two-sided heating promptly, assurance lithium cell that can be fine is heated evenly, improves hot pressing efficiency of software testing greatly.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a lithium cell testing arrangement.
Background
Currently, lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. With the development of science and technology, lithium batteries have become the mainstream nowadays. Lithium batteries can be broadly classified into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996, and the safety, specific capacity, self-discharge rate and cost performance of rechargeable batteries were all superior to those of lithium ion batteries.
In the existing lithium battery manufacturing process, in order to ensure the output quality of the lithium battery, high-voltage test needs to be carried out on the produced lithium battery. Because the diaphragm is arranged in the lithium battery, if micropores exist in the diaphragm, the lithium battery is easy to generate a short circuit phenomenon; in addition, in the production process of the lithium battery, fine particles such as dust are easy to mix into the winding core of the lithium battery, and the short circuit phenomenon of the lithium battery is also easy to occur due to the fine particles such as dust. However, for the existing high-voltage test, the probe is utilized to perform high-voltage discharge on the tab of the lithium battery, so that the lithium battery is tested under the high-voltage condition to determine whether a short circuit phenomenon exists, but the existing probe is designed into a cylindrical structure mostly, and the probe and the tab are in surface contact in the contact process of the probe and the tab, but because the shape of the tab is different due to different types of lithium batteries, the contact between the probe and the tab of the cylindrical structure is not firm enough, and the accuracy of the high-voltage test is further influenced.
Moreover, after the high-voltage test is carried out on the lithium battery, the hot-pressing test is also carried out on the lithium battery, the purpose of the hot-pressing test is to ensure that the positive and negative pole pieces and the diaphragm of the lithium battery are in a compacted state, the stress of the diaphragm of the lithium battery is released through heating, and whether the hot-pressing test of the lithium battery is qualified or not is judged according to the feedback condition of the lithium battery. However, in the existing hot-pressing test, only one side of the lithium battery is heated, and heat is conducted to each position of the lithium battery by heat conduction, but the heating mode has a very big defect, and firstly, the lithium battery is unevenly heated by adopting the one-side heating mode, so that the hot-pressing test result is influenced; secondly, the heating efficiency is very low by adopting a heating mode of one surface, and the efficiency of the hot-pressing test is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide one kind and can guarantee in high-voltage testing, the probe is comparatively firm with utmost point ear contact, high-voltage testing accuracy is higher and can the rapid heating lithium cell, guarantees that the whole even that is heated of lithium cell, the higher lithium cell testing arrangement of hot pressing efficiency of software testing.
The purpose of the utility model is realized through the following technical scheme:
a lithium battery testing device, comprising:
a base;
the lifting external member comprises a mounting frame, an air cylinder and a push plate, the mounting frame is arranged on the base, the air cylinder is arranged on the mounting frame, and the push plate is connected with a driving shaft of the air cylinder;
the hot pressing kit comprises a hot pressing top plate and a hot pressing bottom plate, the hot pressing top plate is connected with the push plate, and the hot pressing bottom plate is arranged on the base;
the high-voltage external member comprises an installation block and two probe external members, the installation block is arranged on the push plate, in one probe external member, the probe external member comprises a sleeve, a probe and an elastic reset member, the sleeve is arranged on the installation block, the probe comprises a sliding part and a contact head which are sequentially connected, the sliding part is slidably arranged in the sleeve, a plurality of sawtooth contact teeth are arranged on the contact head, the elastic reset member is arranged in the sleeve, one end of the elastic reset member is abutted against the end part of the sleeve, and the other end of the elastic reset member is abutted against the sliding part; and
the lithium battery comprises a material supporting plate, wherein a lug placing groove is formed in the material supporting plate, the lug placing groove protrudes upwards at the middle position to form an isolation convex strip, and the lug placing groove is used for placing a lug of a lithium battery;
the material supporting plate is used for being placed in the hot pressing bottom plate, the air cylinder drives the push plate to move towards the direction close to the material supporting plate, so that the sawtooth contact teeth are all in contact with the lugs of the lithium battery, and the hot pressing top plate is in contact with the winding core of the lithium battery.
In one embodiment, the hot-pressed top plate includes a top heat insulating portion, a top heat generating portion, a top heat conducting portion, and a plurality of top heat pipes, the top heat insulating portion, the top heat generating portion, and the top heat conducting portion are sequentially connected, one end of each of the top heat pipes is connected to the top heat generating portion, the other end of each of the top heat pipes is connected to the top heat conducting portion, and the top heat insulating portion is connected to the push plate.
In one embodiment, the hot-press bottom plate includes a bottom heat insulating portion, a bottom heat generating portion, a bottom heat conducting portion, and a plurality of bottom heat conducting pipes, the bottom heat insulating portion, the bottom heat generating portion, and the bottom heat conducting portion are sequentially connected, the bottom heat insulating portion is located on the base, one end of each of the bottom heat conducting pipes is connected to the bottom heat generating portion, and the other end of each of the bottom heat conducting pipes is connected to the bottom heat conducting portion.
In one embodiment, the hot-pressing kit further includes two positioning angle irons, the two positioning angle irons are both disposed on the bottom heat conducting portion, and both the two positioning angle irons are used for abutting against the material supporting plate.
In one embodiment, the bottom heat conducting portion is provided with two mounting holes, the hot-pressing kit further comprises two locking screws, each positioning angle iron is provided with a position avoiding hole, the end portion of each locking screw penetrates through each position avoiding hole in a one-to-one correspondence manner, and the end portion of each locking screw is screwed in each mounting hole in a one-to-one correspondence manner.
In one embodiment, each of the positioning angle irons has an "L" shaped cross section.
In one embodiment, the lifting assembly further comprises a guide rod, the guide rod is slidably mounted on the mounting frame, and an end of the guide rod is connected with the push plate.
In one of them embodiment, the high pressure external member still includes slide rail and retaining member, the slide rail set up in on the push pedal, installation piece slidable mounting in on the slide rail, seted up the locking hole on the installation piece, the retaining member is used for the spiro union during the locking hole, so that the tip top of retaining member holds the slide rail.
In one embodiment, the lithium battery testing device further comprises a handle, and the handle is arranged on the material supporting plate.
In one embodiment, the handle is provided with a holding hole.
The utility model discloses compare in prior art's advantage and beneficial effect as follows:
the utility model discloses a lithium battery testing arrangement is through setting up base, lift external member, high pressure external member and material layer board. In the actual application process, in the high-voltage test, as the contact head of the probe is provided with the plurality of sawtooth contact teeth, the sawtooth contact teeth can be well contacted with the pole lugs of the lithium battery in a point contact mode, compared with the existing surface contact, the sawtooth contact teeth are firmer to be contacted with the pole lugs of the lithium battery, and the accuracy of the high-voltage test cannot be influenced; in the hot pressing test, because the hot pressing external member includes two upper and lower hot pressing roof and hot pressing bottom plate, the hot pressing roof conducts the heat to the one side of rolling up the core through the roll core contact with the lithium cell on, the hot pressing bottom plate passes through the layer board with heat conduction to the another side of rolling up the core, two-sided heating promptly, assurance lithium cell that can be fine is heated evenly, improves hot pressing efficiency of software testing greatly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a lithium battery testing device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
fig. 3 is a schematic view of an internal structure of a probe kit according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention 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 "secured 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 as used herein are for illustrative purposes only and do not represent the only embodiments.
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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a lithium battery testing apparatus 10 includes a base 100, a lifting kit 200, a hot-pressing kit 300, a high-pressure kit 400, and a material supporting plate 500.
In this way, it should be noted that the lifting kit 200 is used for driving the hot pressing kit 300 to perform vertical lifting movement; the hot-pressing kit 300 is used for performing hot-pressing tests on the lithium battery; the high voltage kit 400 is used for performing high voltage testing on the lithium battery; the material pallet 500 is used for placing a lithium battery.
Referring to fig. 1 again, the lifting assembly 200 includes a mounting bracket 210, a cylinder 220 and a push plate 230, the mounting bracket 210 is disposed on the base 100, the cylinder 220 is disposed on the mounting bracket 210, and the push plate 230 is connected to a driving shaft of the cylinder 220.
Therefore, it should be noted that, when the lifting kit 200 is started, the air cylinder 220 outputs power to the push plate 230, and the air cylinder 220 drives the push plate 230 to move up and down.
Referring to fig. 1 again, the hot pressing kit 300 includes a hot pressing top plate 310 and a hot pressing bottom plate 320, the hot pressing top plate 310 is connected to the pushing plate 230, and the hot pressing bottom plate 320 is disposed on the base 100.
So, it should be explained that hot pressing external member 300 is used for carrying out the hot pressing test to the lithium cell, and the heat conduction that hot pressing roof 310 produced is to the one side of the book core of lithium cell, and the heat conduction that hot pressing bottom plate 320 produced is to the another side of the book core of lithium cell on, realizes the two-sided heating to the lithium cell, improves the hot pressing efficiency of software testing to the lithium cell.
Referring to fig. 1, 2 and 3, the high pressure kit 400 includes an installation block 410 and two probe kits 420, the installation block 410 is disposed on the push plate 230, in one probe kit 420, the probe kit 420 includes a sleeve 421, a probe 422 and an elastic restoring member, the sleeve 421 is disposed on the installation block 410, the probe 422 includes a sliding portion 4221 and a contact head 4222 connected in sequence, the sliding portion 4221 is slidably installed in the sleeve 421, the contact head 4222 is provided with a plurality of sawtooth contact teeth 4222a, the elastic restoring member is disposed in the sleeve 421, one end of the elastic restoring member abuts against an end of the sleeve 421, and the other end of the elastic restoring member abuts against the sliding portion 4221.
In this way, it should be noted that, in the high voltage test, since the contact head 4222 of the probe 422 is provided with the plurality of sawtooth contact teeth 4222a, the sawtooth contact teeth 4222a can be well contacted with the tab of the lithium battery in a point contact manner, and compared with the existing surface contact, the sawtooth contact teeth 4222a are more reliable when being contacted with the tab of the lithium battery, and the accuracy of the high voltage test is not affected.
Referring to fig. 2 again, the material supporting plate 500 is provided with a tab placing groove 510, the tab placing groove 510 protrudes upwards at the middle position to form an isolation protruding strip 511, and the tab placing groove 510 is used for placing a tab of a lithium battery.
Thus, it should be noted that the tab placing groove 510 is used for placing a tab of a lithium battery; the setting of isolation convex strip 511 can divide utmost point ear standing groove 510 into two utmost point ear standing grooves 510, corresponds the positive negative pole ear of lithium cell, and the setting of isolation convex strip 511 can be fine prevents that the positive negative pole ear direct emergence contact of lithium cell takes place the short circuit.
Referring to fig. 1 again, when the lithium battery needs to be hot-pressed and tested under high pressure, and the material supporting plate 500 is placed on the hot-pressing bottom plate 320, the air cylinder 220 drives the pushing plate 230 to move toward the material supporting plate 500, so that each sawtooth contact tooth 4222a contacts with a tab of the lithium battery, and the hot-pressing top plate 310 contacts with a winding core of the lithium battery. Further, in one embodiment, the hot-pressed top plate 310 includes a top heat insulating portion, a top heat generating portion, a top heat conducting portion, and a plurality of top heat pipes, the top heat insulating portion, the top heat generating portion, and the top heat conducting portion are sequentially connected, one end of each top heat pipe is connected to the top heat generating portion, the other end of each top heat pipe is connected to the top heat conducting portion, and the top heat insulating portion is connected to the push plate.
Thus, it should be noted that, when the hot-pressed top plate 310 is started to work, heat generated by the top heating portion is conducted to the top heat conducting portion through the top heat conducting pipe, and then the top heat conducting portion conducts the heat to the winding core of the lithium battery; the top insulating portion serves as an insulation to prevent the push plate 230 from being damaged due to excessive heat.
Further, in one embodiment, the hot-pressing bottom plate 320 includes a bottom heat insulating portion, a bottom heating portion, a bottom heat conducting portion, and a plurality of bottom heat pipes, the bottom heat insulating portion, the bottom heating portion, and the bottom heat conducting portion are sequentially connected, the bottom heat insulating portion is located on the base 100, one end of each bottom heat pipe is connected to the bottom heating portion, and the other end of each bottom heat pipe is connected to the bottom heat conducting portion.
Thus, it should be noted that, when the hot-press bottom plate 320 is started to work, heat generated by the bottom heating portion is conducted to the bottom heat conducting portion through the bottom heat conducting pipe, and then the bottom heat conducting portion conducts the heat to the winding core of the lithium battery; the bottom insulating portion serves as heat insulation to prevent the susceptor 100 from being damaged due to excessive heat.
Further, referring to fig. 1 again, in an embodiment, the hot pressing kit 300 further includes two positioning angle irons 330, the two positioning angle irons 330 are disposed on the bottom heat conducting portion, and the two positioning angle irons 330 are both used for abutting against the material supporting plate 500.
So, it should be noted that, the positioning angle iron 330 plays a role in positioning, and when the material supporting plate 500 is placed on the hot pressing bottom plate 320, the two positioning angle irons 330 are both used for abutting against the material supporting plate 500, so as to prevent the material supporting plate 500 from displacing in the high-pressure and hot-pressing testing process and affecting the high-pressure and hot-pressing testing results. Specifically, each positioning angle iron 330 has an "L" shaped cross section. Thus, it should be noted that the positioning angle irons 330 all have an "L" shaped cross section to better limit the material supporting plate 500.
Further, in an embodiment, two mounting holes are formed in the bottom heat conducting portion, the hot-pressing kit 300 further includes two locking screws, each positioning angle iron 330 is formed with a position-avoiding hole, the end portions of the locking screws penetrate through the position-avoiding holes in a one-to-one correspondence manner, and the end portions of the locking screws are screwed in the mounting holes in a one-to-one correspondence manner.
Therefore, it should be noted that the installation holes and the avoiding holes are formed, and the positioning angle iron 330 can be installed on the bottom heat conducting portion in a screw locking manner by the arrangement of the locking screws.
Further, referring to fig. 1 again, in one embodiment, the lifting assembly 200 further includes a guide rod 240, the guide rod 240 is slidably mounted on the mounting frame 210, and an end of the guide rod 240 is connected to the push plate 230.
Thus, it should be noted that the guide rod 240 serves to guide the push plate 230 for better movement.
Further, referring to fig. 2 again, in an embodiment, the high-voltage kit 400 further includes a sliding rail 430 and a locking member, the sliding rail is disposed on the push plate 230, the mounting block 410 is slidably mounted on the sliding rail 430, the mounting block 410 is provided with a locking hole, and the locking member is configured to screw in the locking hole, so that an end of the locking member supports the sliding rail 430.
Thus, it should be noted that the installation block 410 can slide due to the provision of the slide rail 430, and a tester can flexibly move according to a specific distribution condition of the lithium battery tab.
Further, referring to fig. 1 again, in an embodiment, the lithium battery testing device 10 further includes a handle 600, and the handle 600 is disposed on the material supporting plate 500.
Thus, it should be noted that the handle 600 can make it more convenient for the tester to hold the material support plate 500. Specifically, the handle is provided with a holding hole.
It should be further noted that the high voltage kit 400 of the present application can include a plurality of mounting blocks and a plurality of probe kits 420, so as to implement batch testing of lithium batteries.
The utility model discloses a lithium battery testing arrangement is through setting up base, lift external member, high pressure external member and material layer board. In the actual application process, in the high-voltage test, as the contact head of the probe is provided with the plurality of sawtooth contact teeth, the sawtooth contact teeth can be well contacted with the pole lugs of the lithium battery in a point contact mode, compared with the existing surface contact, the sawtooth contact teeth are firmer to be contacted with the pole lugs of the lithium battery, and the accuracy of the high-voltage test cannot be influenced; in the hot pressing test, because the hot pressing external member includes two upper and lower hot pressing roof and hot pressing bottom plate, the hot pressing roof conducts the heat to the one side of rolling up the core through the roll core contact with the lithium cell on, the hot pressing bottom plate passes through the layer board with heat conduction to the another side of rolling up the core, two-sided heating promptly, assurance lithium cell that can be fine is heated evenly, improves hot pressing efficiency of software testing greatly.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A lithium battery testing device, comprising:
a base;
the lifting external member comprises a mounting frame, an air cylinder and a push plate, the mounting frame is arranged on the base, the air cylinder is arranged on the mounting frame, and the push plate is connected with a driving shaft of the air cylinder;
the hot pressing kit comprises a hot pressing top plate and a hot pressing bottom plate, the hot pressing top plate is connected with the push plate, and the hot pressing bottom plate is arranged on the base;
the high-voltage external member comprises an installation block and two probe external members, the installation block is arranged on the push plate, in one probe external member, the probe external member comprises a sleeve, a probe and an elastic reset member, the sleeve is arranged on the installation block, the probe comprises a sliding part and a contact head which are sequentially connected, the sliding part is slidably arranged in the sleeve, a plurality of sawtooth contact teeth are arranged on the contact head, the elastic reset member is arranged in the sleeve, one end of the elastic reset member is abutted against the end part of the sleeve, and the other end of the elastic reset member is abutted against the sliding part; and
the lithium battery comprises a material supporting plate, wherein a lug placing groove is formed in the material supporting plate, the lug placing groove protrudes upwards at the middle position to form an isolation convex strip, and the lug placing groove is used for placing a lug of a lithium battery;
the material supporting plate is used for being placed in the hot pressing bottom plate, the air cylinder drives the push plate to move towards the direction close to the material supporting plate, so that the sawtooth contact teeth are all in contact with the lugs of the lithium battery, and the hot pressing top plate is in contact with the winding core of the lithium battery.
2. The lithium battery testing device as claimed in claim 1, wherein the hot-pressed top plate comprises a top heat insulating part, a top heat generating part, a top heat conducting part and a plurality of top heat conducting pipes, the top heat insulating part, the top heat generating part and the top heat conducting part are sequentially connected, one end of each top heat conducting pipe is connected to the top heat generating part, the other end of each top heat conducting pipe is connected to the top heat conducting part, and the top heat insulating part is connected to the push plate.
3. The lithium battery testing device as claimed in claim 1, wherein the hot-press bottom plate includes a bottom heat insulating portion, a bottom heat generating portion, a bottom heat conducting portion, and a plurality of bottom heat pipes, the bottom heat insulating portion, the bottom heat generating portion, and the bottom heat conducting portion are sequentially connected, the bottom heat insulating portion is located on the base, one end of each of the bottom heat pipes is connected to the bottom heat generating portion, and the other end of each of the bottom heat pipes is connected to the bottom heat conducting portion.
4. The lithium battery testing device as recited in claim 3, wherein the hot-pressing kit further comprises two positioning angle irons, the two positioning angle irons are both disposed on the bottom heat conducting portion, and both the two positioning angle irons are used for abutting against the material supporting plate.
5. The lithium battery testing device as recited in claim 4, wherein the bottom heat conducting portion is provided with two mounting holes, the hot-pressing kit further comprises two locking screws, each positioning angle iron is provided with a position-avoiding hole, an end portion of each locking screw penetrates through each position-avoiding hole in a one-to-one correspondence manner, and an end portion of each locking screw is screwed in each mounting hole in a one-to-one correspondence manner.
6. The lithium battery testing device as recited in claim 4, characterized in that each of the positioning angle irons has an "L" -shaped cross section.
7. The lithium battery testing device of claim 1, wherein the lifting kit further comprises a guide rod, the guide rod is slidably mounted on the mounting frame, and an end of the guide rod is connected with the push plate.
8. The lithium battery testing device according to claim 1, wherein the high-voltage kit further comprises a sliding rail and a locking member, the sliding rail is arranged on the pushing plate, the mounting block is slidably mounted on the sliding rail, the mounting block is provided with a locking hole, and the locking member is screwed in the locking hole so that the end of the locking member abuts against the sliding rail.
9. The lithium battery testing device of claim 1, further comprising a handle disposed on the material support plate.
10. The lithium battery testing device as recited in claim 9, wherein the handle is provided with a holding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823129.0U CN210270107U (en) | 2019-05-31 | 2019-05-31 | Lithium battery testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920823129.0U CN210270107U (en) | 2019-05-31 | 2019-05-31 | Lithium battery testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210270107U true CN210270107U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920823129.0U Active CN210270107U (en) | 2019-05-31 | 2019-05-31 | Lithium battery testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210270107U (en) |
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2019
- 2019-05-31 CN CN201920823129.0U patent/CN210270107U/en active Active
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Effective date of registration: 20220119 Address after: 414000 administrative service center of Huarong Industrial Concentration Area, Yueyang City, Hunan Province (Sanfeng Industrial Park) Patentee after: Hunan juheyuan Technology Co.,Ltd. Address before: Plant A02, Jingyang Science Park, No.4, Donghua South Road, Dongjiang Industrial Park, Zhongkai high tech Zone, Huizhou City, Guangdong Province, 516006 Patentee before: Huizhou Juheyuan Technology Co.,Ltd. |