CN219590485U - Test connection structure and test system for detecting battery module - Google Patents
Test connection structure and test system for detecting battery module Download PDFInfo
- Publication number
- CN219590485U CN219590485U CN202223204008.9U CN202223204008U CN219590485U CN 219590485 U CN219590485 U CN 219590485U CN 202223204008 U CN202223204008 U CN 202223204008U CN 219590485 U CN219590485 U CN 219590485U
- Authority
- CN
- China
- Prior art keywords
- test
- fuse
- battery module
- test connection
- pin connector
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 123
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The embodiment of the utility model discloses a test connection structure and a test system for detecting a battery module. The test connection structure comprises a test connection piece and a safety piece; the first end of the test connecting piece is used for being electrically connected with the battery module, and the second end of the test connecting piece is used for being electrically connected with the detection equipment; the safety piece is arranged on the power-on circuit of the test connecting piece; the overcurrent of the fuse element is smaller than that of the fuse wire of the battery module; therefore, even if the short-circuit fault occurs in the detection circuit due to misoperation of a tester or other external reasons, the fuse arranged on the test connecting piece can be blown, and the fuse arranged on the battery module can not be directly ablated, so that the situation that the battery pack needs to be returned to a factory for maintenance or even scrapped due to the short-circuit fault of the detection circuit during offline detection is avoided, and the production cost is greatly reduced. The test system comprises a detection device and the test connection structure, wherein the detection device is electrically connected with the second end of the test connection piece.
Description
Technical Field
The present utility model relates to the field of battery module detection technologies, and in particular, to a test connection structure and a test system for detecting a battery module.
Background
The battery package needs to carry out the off-line detection after the equipment is accomplished, specifically includes: safety rule test, high-low voltage electrical isolation performance test, charge and discharge performance test, battery pack DCR test, cell DCR test, dynamic pressure difference test, temperature rise test and EOL test, wherein the test items are necessary test items proposed by customers, have a plurality of items and have long beats.
In the current offline detection of a battery pack, a wire harness which is defined and designed according to a battery module and a test item is generally used for connecting the battery module and the detection equipment, one end of the wire harness, which is used for connecting the detection equipment, needs to be peeled off and then is connected with the detection equipment, and the connection between the wire harness and the detection equipment is generally complex; therefore, when the battery pack is currently detected in a offline mode, short circuit faults can occur to the detection circuit due to short circuit of the wire harness connected with the detection equipment, which is possibly caused by misoperation of a tester, or short circuit faults can occur to the detection circuit due to other external reasons, fuses of the battery module are ablated, and the battery pack needs to be returned to a factory for maintenance and even scrapped.
Disclosure of Invention
In order to overcome at least one defect in the prior art, the utility model provides a test connection structure for detecting a battery module, which aims to solve the problem that a detection circuit has a short circuit fault to ablate a fuse wire of the battery module during offline detection due to misoperation of a tester or other external reasons, and avoid that a battery pack needs to be returned to a factory for maintenance or even scrapped due to the short circuit fault of the detection circuit during offline test. The utility model also provides a test system comprising the test connection structure.
The utility model adopts the technical proposal for solving the problems that:
a test connection structure for detecting a battery module, comprising: the first end of the test connecting piece is used for being electrically connected with the battery module, and the second end of the test connecting piece is used for being electrically connected with the detection equipment; the safety piece is arranged on the power-on circuit of the test connecting piece; the overcurrent of the fuse is smaller than that of the fuse of the battery module.
According to the test connection structure for detecting the battery module, the battery module and the detection equipment are connected through the test connection piece to perform offline detection on the battery pack, and because the overcurrent of the fuse piece arranged on the test connection piece is smaller than that of the fuse wire arranged on the battery module, even if the detection circuit has a short circuit fault due to misoperation of a tester or other external reasons, the fuse piece arranged on the test connection piece is only burnt out, the fuse wire arranged on the battery module is not directly ablated, and the battery pack is prevented from being repaired or scrapped in a factory due to the short circuit fault of the detection circuit during offline detection, so that the production cost is greatly reduced.
According to some embodiments of the utility model, the test connector has a plurality of the energizing lines, each of which is provided with the fuse.
Through adopting above-mentioned scheme, many power on lines can satisfy according to the battery module design and realize the test requirement of multiple detection project to a plurality of insurance pieces can realize multiple insurance, improve the sensitivity and the reliability that the insurance piece protected battery module when detection circuit short circuit fault appears.
According to some embodiments of the utility model, the safety element is detachably arranged on the energizing circuit.
By adopting the scheme, when the safety part is burnt out due to short-circuit fault of the detection circuit, the novel safety part is convenient to replace on the test connecting part.
According to some embodiments of the utility model, the fuse is any one of a patch fuse, a micro fuse, a tab fuse, a tubular fuse, and a current sensor.
By adopting the scheme, the device has the advantages of simple structure, easy function realization and low production cost.
According to some embodiments of the utility model, the first and second ends are each provided with a first multi-PIN connector.
Through adopting above-mentioned scheme, be convenient for according to battery module design and realize multiple detection project.
According to some embodiments of the utility model, the test connection structure further comprises an insulating support plate provided to the first multi-PIN connector to support the first multi-PIN connector.
Through adopting above-mentioned scheme, can form to support and protect first many PIN connector in the detection process that rolls off production line, can guarantee the job stabilization nature of first many PIN connector, avoid first many PIN connector to be in the in-process of other interfaces repeated pull-out and plug because of colliding with and wearing and tearing
According to some embodiments of the utility model, the test connection is clamped between the first multi-PIN connector and the insulating support plate.
Through adopting above-mentioned scheme, on the one hand, can make insulating backup pad play the supporting role to test connecting piece and first many PIN connector simultaneously, on the other hand can form the protection to test connecting piece, avoids test connecting piece to collide with external object.
According to some embodiments of the utility model, the first multi-PIN connector is provided with a clamping block, and the clamping block is sequentially inserted into the test connector and the insulating support plate.
Through adopting above-mentioned scheme for form a whole between guaranteeing first many PIN connectors, test connection spare and the insulating backup pad three, can guarantee the connection stability between first many PIN connectors, test connection spare and the insulating backup pad three.
According to some embodiments of the utility model, the test connection structure further comprises a first wire harness and a second wire harness; one end of the first wire harness is provided with a second multi-PIN connector, the second multi-PIN connector is electrically connected with one of the first multi-PIN connectors, and the other end of the first wire harness is electrically connected with the battery module; one end of the second wire harness is provided with a third multiple PIN connector, the third multiple PIN connector is electrically connected with the other first multiple PIN connector, and the other end of the second wire harness is electrically connected with the detection equipment.
Through adopting above-mentioned scheme, the setting of first pencil and second pencil is convenient for test connecting piece respectively with battery module and check out test set electricity be connected, can improve and simplify the wiring design, reduction in production cost.
The utility model also provides a test system, which comprises the test connection structure and further comprises detection equipment, wherein the detection equipment is electrically connected with the second end of the test connection piece.
Drawings
FIG. 1 is a schematic top view of a test connection structure according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic perspective view of a test connection structure according to an embodiment of the present utility model;
fig. 4 is a schematic perspective view of a first multi-PIN connector according to an embodiment of the present utility model.
Wherein the reference numerals have the following meanings:
10-test connector, 101-energizing circuit, 11-first multiple PIN connector, 111-fixture block, 12-second multiple PIN connector, 13-third multiple PIN connector, 14-fourth multiple PIN connector, 15-fuse, 151-terminal electrode, 152-fuse link, 16-insulating support plate, 17-first wire harness, 18-second wire harness.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
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.
Referring to fig. 1 to 3, an embodiment of the present utility model discloses a test connection structure for detecting a battery module, which includes a test connection member 10 and a safety member 15; the first end of the test connector 10 is used for being electrically connected with the battery module, and the second end of the test connector 10 is used for being electrically connected with the detection equipment; the safety element 15 is arranged on the power-on circuit 101 of the test connector 10; wherein, the overcurrent of the fuse 15 is smaller than that of the fuse of the battery module. As will be appreciated by those skilled in the art, an overcurrent refers to the current value that the fuse 15 needs to reach to blow or open the circuit.
The embodiment of the utility model also provides a test system, which comprises the test connection structure and further comprises a detection device, wherein the detection device is electrically connected with the second end of the test connector 10.
The battery PACK (also called PACK) is used as a power core component of an electric automobile or other electric driving equipment, not only has strict quality management on a production line, but also needs to carry out offline detection after the battery PACK is assembled, and specifically comprises the following steps: safety rule test, high-low voltage electrical isolation performance test, charge and discharge performance test, battery pack DCR test, cell DCR test, dynamic pressure difference test, temperature rise test and EOL test, wherein the test items are necessary test items proposed by customers, have a plurality of items and have long beats.
In the prior art, the battery pack is subjected to offline detection, a wire harness which is defined and designed according to a battery module and a test item is generally used for connecting the battery module and the detection equipment, one end of the wire harness, which is used for connecting the detection equipment, is required to be peeled off and then is connected with the detection equipment, and the connection of the wire harness and the detection equipment is generally complex; therefore, when the prior art is used for detecting the battery pack in a down-line manner, the short circuit fault of the detection circuit may occur due to the short circuit of the wire harness for connecting the detection device caused by the misoperation of the tester, or the short circuit fault of the detection circuit may occur due to other external reasons, and the fuse of the battery module is ablated, so that the battery pack needs to be returned to the factory for maintenance or even scrapped.
According to the test connection structure for detecting the battery module, the battery module and the detection equipment are connected through the test connection piece 10 to perform offline detection on the battery pack, and because the overcurrent of the safety piece 15 arranged on the test connection piece 10 is smaller than that of the fuse wire arranged on the battery module, even if the detection circuit has short circuit faults caused by misoperation of a tester or other external reasons, the safety piece 15 arranged on the test connection piece 10 is only burnt out, the fuse wire arranged on the battery module is not directly ablated, the battery pack is prevented from being repaired or scrapped in a factory due to the short circuit faults of the detection circuit during offline detection, and the production cost is greatly reduced.
As shown in fig. 2, further, in the present embodiment, the test connector 10 has a plurality of power-on lines 101, the plurality of power-on lines 101 are respectively provided with a safety member 15, the test requirements of various detection items according to the design of the battery module can be met through the plurality of power-on lines 101, and multiple safety can be realized through the plurality of safety members 15, so that the sensitivity and reliability of the safety member 15 for protecting the battery module when the detection circuit has a short circuit fault are greatly improved.
The fuse 15 can realize the overcurrent protection to the fuse that the battery module had when the detection of cutting off the production line, need guarantee the operational reliability of fuse 15 constantly, preferably, in this embodiment, fuse 15 detachably locates circular telegram circuit 101, so set up, on the one hand, when fuse 15 is burnt out because of detection circuitry appears short circuit trouble, can conveniently and in time change new fuse 15, on the other hand, even fuse 15 is burnt the ring and also need not change test connection 10, improved test connection 10's life, reduced the manufacturing cost that carries out the detection of cutting off the production line.
Specifically, in this embodiment, the test connector 10 is an FPC (flexible circuit board), which has the advantages of high efficiency and low cost, and importantly, the FPC can be flexibly designed, i.e. can be customized according to the requirements of the battery modules and the test items to adapt to different battery modules and test items, so that the adaptability is strong. Of course, in some other embodiments, the test connector 10 may also be a circuit connection structure such as a PCB, a wire cable, or the like, which is not limited herein.
Specifically, in this embodiment, the fuse 15 is a patch fuse, and the patch fuse is a new variety with relatively high technical content in a small-sized fuse, and has a simple structure, easy function implementation and low production cost, and is particularly suitable for use in small-sized electronic apparatuses; more specifically, the patch fuse includes a fuse body 152 and two terminal electrodes 151 corresponding to both ends of the fuse body 152, and both ends of the fuse body 152 are electrically connected to the energizing line 101 through the two terminal electrodes 151. Indeed, in some other embodiments, the fuse 15 may also be, but is not limited to, any of a micro fuse, a tab fuse, a tubular fuse, and a current sensor.
As shown in fig. 3, in the present embodiment, it is preferable that the first and second ends of the test connection member 10 are provided with the first multi-PIN connector 11, respectively, such that various test items are designed and implemented according to the battery module by using the first multi-PIN connector 11.
It can be appreciated that in the offline detection process, the first multi-PIN connector 11 needs to be repeatedly plugged into and plugged from other interfaces, so that the first multi-PIN connector 11 is easy to be damaged due to collision, preferably, in the embodiment, the test connection structure further comprises an insulation support plate 16, the insulation support plate 16 is arranged on the first multi-PIN connector 11, the insulation support plate 16 can support and protect the first multi-PIN connector 11 in the offline detection process, abrasion of the first multi-PIN connector 11 due to collision in the repeated plugging process with other interfaces is avoided, and therefore the working stability of the first multi-PIN connector 11 is improved.
Further, the test connector 10 is clamped between the first multi-PIN connector 11 and the insulating support plate 16, so that, on one hand, the insulating support plate 16 can simultaneously support the test connector 10 and the first multi-PIN connector 11, and on the other hand, the test connector 10 can be protected from collision between the test connector 10 and an external object.
As shown in fig. 3 and 4, in order to ensure the connection stability among the first multi-PIN connector 11, the test connector 10 and the insulating support plate 16, preferably, in the present embodiment, the first multi-PIN connector 11 is provided with a fixture block 111, and the fixture block 111 is sequentially inserted into the test connector 10 and the insulating support plate 16, so that an integral body is ensured among the first multi-PIN connector 11, the test connector 10 and the insulating support plate 16.
Specifically, in the present embodiment, the test connection structure further includes a first harness 17 and a second harness 18; one end of the first wire harness 17 is provided with a second multi-PIN connector 12, the second multi-PIN connector 12 is electrically connected with one first multi-PIN connector 11, and the other end of the first wire harness 17 is used for being electrically connected with the battery module; one end of the second wire harness 18 is provided with a third multiple PIN connector 13, the third multiple PIN connector 13 is electrically connected with the other first multiple PIN connector 11, and the other end of the second wire harness 18 is used for being electrically connected with detection equipment; more specifically, the first harness 17 is electrically connected to the battery module through the fourth multi-PIN connector 14, and the second harness 18 is directly electrically connected to the detecting device.
Thus, the use of the first wire harness 17 and the second wire harness 18 can improve and simplify the wiring design, maximally utilize the space, provide a safer working environment, and can reduce the installation and maintenance time; importantly, the wire harness is reasonably designed, so that the detection circuit can be protected from being influenced by outdoor environment, indoor chemical substances, moisture and the like, and the electric wires can be protected from being worn or exposed to danger, and the risk of accidents is reduced to the greatest extent.
In summary, the test connection structure and the test system for detecting the battery module disclosed by the utility model have the following beneficial technical effects:
1) The overcurrent of the fuse 15 is smaller than that of the fuse provided in the battery module, even if the detection circuit has short-circuit fault caused by misoperation of a tester or other external reasons, the fuse provided in the battery module is only blown out, and the fuse provided in the battery module is not directly ablated, so that the condition that the battery pack needs to be returned to a factory for maintenance or even scrapped due to the short-circuit fault of the detection circuit during offline detection is avoided, and the production cost is greatly reduced;
2) The safety piece 15 is detachably arranged on the power-on circuit 101, when the safety piece 15 is burnt out due to short-circuit fault of the detection circuit, a new safety piece 15 can be conveniently and timely replaced, and the test connecting piece 10 does not need to be replaced even if the safety piece 15 is burnt out, so that the service life of the test connecting piece 10 is prolonged, and the production cost required for offline detection is reduced;
3) By adopting the first multi-PIN connector 11, various detection items are designed and realized according to the battery module;
4) The use of the first wire harness 17 and the second wire harness 18 can improve and simplify the wiring design, maximize the use of space, provide a safer working environment, and can reduce installation and maintenance time.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (10)
1. A test connection structure for detecting battery module, its characterized in that includes:
the test device comprises a test connecting piece (10), wherein a first end of the test connecting piece (10) is used for being electrically connected with a battery module, and a second end of the test connecting piece (10) is used for being electrically connected with detection equipment;
a safety member (15) provided on the energizing line (101) of the test connector (10);
wherein, the overcurrent of the insurance piece (15) is smaller than the overcurrent of the fuse of the battery module.
2. The test connection according to claim 1, characterized in that the test connection (10) has a plurality of the energizing lines (101), a plurality of the energizing lines (101) each being provided with the fuse (15).
3. The test connection according to claim 1, characterized in that the safety element (15) is detachably arranged on the energizing circuit (101).
4. The test connection structure according to claim 1, wherein the fuse (15) is any one of a patch fuse, a micro fuse, a tab fuse, a tubular fuse, and a current sensor.
5. Test connection according to claim 2, characterized in that the first and the second end are each provided with a first multi-PIN connector (11).
6. The test connection structure according to claim 5, further comprising an insulating support plate (16), said insulating support plate (16) being provided to said first multi-PIN connector (11) to support said first multi-PIN connector (11).
7. Test connection structure according to claim 6, characterized in that the test connection (10) is clamped between the first multi-PIN connector (11) and the insulating support plate (16).
8. The test connection structure according to claim 7, wherein the first multi-PIN connector (11) is provided with a fixture block (111), and the fixture block (111) is sequentially inserted into the test connection member (10) and the insulating support plate (16).
9. The test connection structure according to any one of claims 5-8, characterized in that the test connection structure further comprises a first wire harness (17) and a second wire harness (18);
one end of the first wire harness (17) is provided with a second multi-PIN connector (12), the second multi-PIN connector (12) is electrically connected with one of the first multi-PIN connectors (11), and the other end of the first wire harness (17) is electrically connected with the battery module;
one end of the second wire harness (18) is provided with a third multi-PIN connector (13), the third multi-PIN connector (13) is electrically connected with the other first multi-PIN connector (11), and the other end of the second wire harness (18) is electrically connected with the detection equipment.
10. Test system, comprising a test connection according to any of claims 1-9, further comprising a detection device, which is electrically connected to the second end of the test connection (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223204008.9U CN219590485U (en) | 2022-11-30 | 2022-11-30 | Test connection structure and test system for detecting battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223204008.9U CN219590485U (en) | 2022-11-30 | 2022-11-30 | Test connection structure and test system for detecting battery module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219590485U true CN219590485U (en) | 2023-08-25 |
Family
ID=87687205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223204008.9U Active CN219590485U (en) | 2022-11-30 | 2022-11-30 | Test connection structure and test system for detecting battery module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219590485U (en) |
-
2022
- 2022-11-30 CN CN202223204008.9U patent/CN219590485U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207800816U (en) | Power battery module signal pickup assembly | |
| KR20130003381A (en) | Battery cell protection device of eco-friendly vehicle | |
| CN109411648A (en) | A kind of safely and fast Wiring type battery connecting box and bus connection method | |
| CN219590485U (en) | Test connection structure and test system for detecting battery module | |
| CN117458090A (en) | Wireless beam battery pack breaking unit | |
| CN111890940A (en) | BDU, battery package, power supply unit and electric automobile | |
| CN210376451U (en) | Battery module voltage acquisition assembly structure | |
| CN219370810U (en) | Switching unit, switching electric appliance and power conversion device | |
| CN111775706A (en) | Power battery low-voltage manual maintenance switch control system and vehicle | |
| CN214958134U (en) | High-voltage distribution box | |
| CN217406169U (en) | Switch protection circuit, switch box and energy storage assembly | |
| CN208984782U (en) | Discharging detection device and battery discharging detecting system | |
| CN210110981U (en) | Accumulator set type safety device | |
| CN218939964U (en) | Insurance structure, FPC structure and electronic equipment | |
| CN212114775U (en) | Protection device for remote charging and discharging storage battery | |
| CN221150953U (en) | Series DCDC short-circuit protection circuit and short-circuit protector | |
| CN220914522U (en) | Signal acquisition line and lithium battery | |
| CN218386889U (en) | Power distribution assembly and battery assembly | |
| CN216086134U (en) | Voltage protection and switching device | |
| CN219997244U (en) | Fuse keysets test fixture | |
| CN219875157U (en) | Storage battery charging switch protection combination device | |
| CN216145578U (en) | 4-level socket type current fuse for instrument | |
| CN207425778U (en) | A kind of split type fuse box | |
| CN109088466A (en) | A kind of Storage battery protecting device | |
| CN218702744U (en) | High-voltage junction box for quick-change battery box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |