CN214874244U - Low-voltage to high-voltage conversion power supply for new energy automobile management system - Google Patents
Low-voltage to high-voltage conversion power supply for new energy automobile management system Download PDFInfo
- Publication number
- CN214874244U CN214874244U CN202121199616.8U CN202121199616U CN214874244U CN 214874244 U CN214874244 U CN 214874244U CN 202121199616 U CN202121199616 U CN 202121199616U CN 214874244 U CN214874244 U CN 214874244U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- voltage conversion
- output
- output circuit
- 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
Images
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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model belongs to the technical field of the new forms of energy, especially, relate to a new energy automobile management system changes high voltage conversion power supply with low pressure, including the voltage input circuit, voltage conversion control circuit and the transformer circuit that connect gradually, still include: the rectification output circuit is connected with the transformer circuit and is used for rectifying and outputting the voltage output by the transformer circuit; the first high-voltage direct current output circuit is connected with the rectification output circuit; and the second high-voltage direct current output circuit is connected with the rectification output circuit. The utility model discloses follow respectively first high voltage direct current output circuit with second high voltage direct current output circuit output voltage has further realized multichannel voltage output to satisfy new energy automobile's voltage user demand, provide the voltage supply basis for more functions of new energy automobile management system amplification.
Description
Technical Field
The utility model belongs to the technical field of the new forms of energy, especially, relate to a new energy automobile management system changes high voltage conversion power supply with low pressure.
Background
Currently, lithium-ion batteries have proven to be the most desirable power source for pure electric vehicles due to their high charge density and low weight. Since the size of the lithium electronic battery is large, the operation property is very unstable. In addition, the system is formed by combining single batteries, the voltage and current working condition of the single batteries is difficult to monitor under any condition, and in order to solve the problem, a special system is developed, namely a new energy automobile management system.
With the development of battery technology, functional ideas of a new energy automobile management system are gradually perfected, and the requirements for high voltage and low voltage are gradually enhanced with the increase of functions, so that more voltage output is needed, but the voltage output in the current new energy automobile management system is not perfect enough, so that the problem that the use requirements of a new energy automobile cannot be met by high-low voltage conversion exists, and therefore, a low-voltage-to-high-voltage conversion power supply for the new energy automobile management system is really needed to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new energy automobile management system changes high voltage conversion power supply with low pressure, the high-low voltage conversion that aims at solving among the prior art new energy automobile management system existence can not satisfy the technical problem of new energy automobile's user demand.
In order to achieve the above object, the embodiment of the utility model provides a new energy automobile management system changes high voltage conversion power supply with low pressure, including the voltage input circuit, the voltage conversion control circuit and the transformer circuit that connect gradually, still include:
the rectification output circuit is connected with the transformer circuit and is used for rectifying and outputting the voltage output by the transformer circuit;
the first high-voltage direct-current output circuit is connected with the rectification output circuit and is used for outputting the voltage output by the rectification output circuit after the voltage is reduced;
and the second high-voltage direct current output circuit is connected with the rectification output circuit and is used for outputting the voltage output by the rectification output circuit after the voltage is reduced.
Optionally, the first high-voltage dc output circuit includes a first voltage conversion chip and a first dc output port, the first voltage conversion chip is connected to the output end of the rectification output circuit, and the first dc output port is connected to the first voltage conversion chip.
Optionally, a twenty-seventh capacitor, a first inductor, and a forty-sixth resistor are further disposed between the first voltage conversion chip and the first dc output port, one end of the twenty-seventh capacitor and one end of the first inductor are both connected to the fifth pin of the first voltage conversion chip, the other end of the twenty-seventh capacitor is connected to the forty-sixth resistor, the forty-sixth resistor is further grounded, the other end of the first inductor is connected to the first pin of the first dc output port, and the second pin of the first dc output port is grounded.
Optionally, the second high-voltage dc output circuit includes a second voltage conversion chip and a second dc output port, the second voltage conversion chip is connected to the output end of the rectification output circuit, and the second dc output port is connected to the second voltage conversion chip.
Optionally, the rectification output circuit includes an output filter circuit and a high-voltage output circuit, the output filter circuit is connected to the transformer circuit, the high-voltage output circuit is connected to the output filter circuit, and an output end of the high-voltage output circuit is further connected to the first voltage conversion chip and the second voltage conversion chip U3.
Optionally, the output filter circuit includes a twenty-third resistor, a twenty-fifth capacitor and a ninth diode, the twenty-third resistor and the first end of the ninth diode are all connected to the transformer circuit, one end of the twenty-fifth capacitor is connected to the twenty-third resistor, the other end of the twenty-fifth capacitor is connected to the second end of the ninth diode, and the second end of the ninth diode is further connected to the high-voltage output circuit.
Optionally, the high-voltage output circuit includes a rectifier bridge and a high-voltage dc output port, the rectifier bridge is connected to the ninth diode and the transformer circuit, the high-voltage dc output port is connected to the rectifier bridge, and a first pin of the high-voltage dc output port is connected to a fourth pin of the first voltage conversion chip and a fourth pin of the second voltage conversion chip.
Optionally, the transformer circuit includes a transformer, a primary winding of the transformer is connected to the voltage conversion control circuit, and a secondary winding of the transformer is connected to both the ninth diode and the rectifier bridge.
Optionally, the voltage conversion control circuit includes a voltage control chip, a sixth pin of the voltage control chip is connected to a fourth MOS transistor and then connected to the primary winding of the transformer, and a seventh pin of the voltage control chip is connected to the voltage input circuit.
Optionally, the voltage input circuit includes a low-voltage dc input port and a first diode, one end of the first diode is connected to the low-voltage dc input port, and the other end of the first diode is further connected to a seventh pin of the voltage control chip and the primary winding of the transformer.
The embodiment of the utility model provides a new energy automobile management system changes above-mentioned one or more technical scheme in the high voltage conversion power supply with low pressure has one of following technological effect at least:
the utility model discloses a voltage input circuit low-voltage input under voltage conversion control circuit's control, will the low-voltage warp of voltage input circuit input transformer circuit makes voltage conversion, and then passes through rectifier output circuit is to voltage rectifier output high voltage, still simultaneously through setting first high voltage direct current output circuit with second high voltage direct current output circuit realizes will the high voltage of rectifier output circuit output carries out voltage conversion once more, and then follows respectively first high voltage direct current output circuit with second high voltage direct current output circuit output voltage has further realized multichannel voltage output to satisfy new energy automobile's voltage user demand, provide the voltage supply basis for new energy automobile management system increases more functions.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a low-voltage to high-voltage conversion power supply for a new energy automobile management system provided by an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a first high-voltage dc output circuit according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100. a voltage input circuit; 200. a voltage conversion control circuit; 300. a transformer circuit; 400. a rectification output circuit; 410. an output filter circuit; 420. a high voltage output circuit; 500. a first high voltage direct current output circuit; 600. and the second high-voltage direct current output circuit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
In an embodiment of the present invention, as shown in fig. 1-2, a low-voltage to high-voltage conversion power supply for a new energy vehicle management system is provided, which includes a voltage input circuit 100, a voltage conversion control circuit 200 and a transformer circuit 300 connected in sequence.
New energy automobile management system changes high voltage conversion power supply with low pressure still includes: rectifier output circuit 400, first high voltage dc output circuit 500 and second high voltage dc output circuit 600.
The rectification output circuit 400 is connected to the transformer circuit 300, and is configured to rectify and output the voltage output by the transformer circuit 300; the first high-voltage direct-current output circuit 500 is connected to the rectification output circuit 400, and is configured to step down and output the voltage output by the rectification output circuit 400; the second high-voltage dc output circuit 600 is connected to the rectification output circuit 400, and is configured to step down the voltage output by the rectification output circuit 400 and output the voltage.
The utility model discloses a voltage input circuit 100 low-voltage input under voltage conversion control circuit 200's control, will the low-voltage warp of voltage input circuit 100 input transformer circuit 300 makes voltage conversion, and then passes through rectification output circuit 400 is to voltage rectification output high voltage, still simultaneously through setting up first high voltage direct current output circuit 500 with second high voltage direct current output circuit 600 realizes will the high voltage of rectification output circuit 400 output carries out voltage conversion once more, and then follows respectively first high voltage direct current output circuit 500 with second high voltage direct current output circuit 600 output voltage has further realized multichannel voltage output to satisfy new energy automobile's voltage user demand, provide the voltage supply basis for new energy automobile management system increases more functions.
In another embodiment of the present invention, as shown in fig. 1-2, the first high-voltage dc output circuit 500 includes a first voltage conversion chip U2 and a first dc output port CN3, the first voltage conversion chip U2 is connected to the output end of the rectification output circuit 400, and the first dc output port CN3 is connected to the first voltage conversion chip U2. Specifically, the first voltage conversion chip U2 is connected to the output terminal of the rectification output circuit 400, so that the first voltage conversion chip U2 performs voltage conversion again on the voltage output by the output terminal of the rectification output circuit 400, thereby realizing voltage output different from the voltage output by the output terminal of the rectification output circuit 400, and further supplying power to the functional module to be expanded by research and development personnel based on the different voltages, thereby satisfying the use requirement. Further, the first dc output port CN3 is used for outputting the voltage converted by the first voltage conversion chip U2.
In another embodiment of the present invention, as shown in fig. 1-2, a twenty-seventh capacitor C27, a first inductor L1 and a forty-sixth resistor R46 are further disposed between the first voltage conversion chip U2 and the first dc output port CN3, one end of each of the twenty-seventh capacitor C27 and the first inductor L1 is connected to the fifth pin of the first voltage conversion chip U2, the other end of the twenty-seventh capacitor C27 is connected to the forty-sixth resistor R46, the forty-sixth resistor R46 is further grounded, the other end of the first inductor L1 is connected to the first pin of the first dc output port CN3, and the second pin of the first dc output port CN3 is grounded. Specifically, the twenty-seventh capacitor C27, the first inductor L1 and the forty-sixth resistor R46 are arranged to realize filtering before voltage output after conversion by the first voltage conversion chip U2, so that the stability of output voltage is ensured, and the stability of the whole circuit is improved.
In another embodiment of the present invention, as shown in fig. 1-2, the second high-voltage dc output circuit 600 includes a second voltage conversion chip U3 and a second dc output port CN4, the second voltage conversion chip U3 is connected to the output end of the rectification output circuit 400, and the second dc output port CN4 is connected to the second voltage conversion chip U3. Specifically, the second voltage conversion chip U3 is used for performing voltage conversion on the voltage output by the output terminal of the rectified output circuit 400 again, so as to provide one more voltage output, thereby further meeting the voltage use requirement.
In this embodiment, the first voltage conversion chip U2 and the second voltage conversion chip U3 are preferably the same type. Of course, the first voltage conversion chip U2 and the second voltage conversion chip U3 may select the model of the specific DC-DC voltage conversion chip according to actual requirements to realize different voltage outputs, and further meet the actual requirements, which is not specifically limited in this application.
In another embodiment of the present invention, as shown in fig. 1-2, the rectification output circuit 400 includes an output filter circuit 410 and a high voltage output circuit 420, the output filter circuit 410 is connected to the transformer circuit 300, the high voltage output circuit 420 is connected to the output filter circuit 410, and the output end of the high voltage output circuit 420 is further connected to the first voltage conversion chip U2 and the second voltage conversion chip U3. Specifically, the output filter circuit 410 is configured to filter a voltage ripple coefficient of the voltage output by the transformer circuit 300, so that the voltage ripple coefficient is reduced, and a waveform becomes smoother, thereby ensuring stability of the output voltage.
In another embodiment of the present invention, as shown in fig. 1-2, the output filter circuit 410 includes a twenty-third resistor R23, a twenty-fifth capacitor C25 and a ninth diode D9, the twenty-third resistor R23 and the first end of the ninth diode D9 are both connected to the transformer circuit 300, one end of the twenty-fifth capacitor C25 is connected to the twenty-third resistor R23, the other end of the twenty-fifth capacitor C25 is connected to the second end of the ninth diode D9, and the second end of the ninth diode D9 is further connected to the high voltage output circuit 420. Further, a voltage filtering function is realized by the twenty-third resistor R23, the twenty-fifth capacitor C25 and the ninth diode D9.
In another embodiment of the present invention, as shown in fig. 1-2, the high voltage output circuit 420 includes a rectifier bridge DB1 and a high voltage dc output port CN2, the rectifier bridge DB1 is connected to the ninth diode D9 and the transformer circuit 300, the high voltage dc output port CN2 is connected to the rectifier bridge DB1, and the first pin of the high voltage dc output port CN2 is connected to the fourth pin of the first voltage conversion chip U2 and the fourth pin of the second voltage conversion chip U3. Specifically, in the present embodiment, the model of the rectifier bridge DB1 is DB207 GSSM.
Specifically, the transformer circuit 300 includes a transformer T1, a primary winding of the transformer T1 is connected to the voltage conversion control circuit 200, and a secondary winding of the transformer T1 is connected to both the ninth diode D9 and the rectifier bridge DB 1.
Furthermore, the voltage conversion control circuit 200 includes a voltage control chip U1, a sixth pin of the voltage control chip U1 is connected to a fourth MOS transistor Q4 and then connected to the primary winding of the transformer T1, and a seventh pin of the voltage control chip U1 is connected to the voltage input circuit 100. In this embodiment, the model of the voltage control chip U1 is preferably UC2845 BD.
In another embodiment of the present invention, as shown in fig. 1-2, the voltage input circuit 100 includes a low voltage dc input port CN1 and a first diode D1, one end of the first diode D1 is connected to the low voltage dc input port CN1, and the other end of the first diode D1 is further connected to the seventh pin of the voltage control chip U1 and the primary winding of the transformer T1. Specifically, in the present embodiment, the voltage input through the low-voltage dc input port CN1 is preferably 12V. The first diode D1 has an indicating function, and the first diode D1 lights up when the voltage inputted through the low voltage DC input port CN1 is normally connected to the circuit.
It should be noted that, the present application aims to protect the circuit structure, and for the software control part, a person skilled in the art should program the software control part appropriately according to the types of the chips in the present application to realize the corresponding functions, so that the part is a mature and formed technology in the prior art and is not a protection focus of the present application, and therefore, the control part is not specifically described in the present application.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a new energy automobile management system changes high voltage conversion power with low pressure, includes voltage input circuit, voltage conversion control circuit and the transformer circuit who connects gradually, its characterized in that still includes:
the rectification output circuit is connected with the transformer circuit and is used for rectifying and outputting the voltage output by the transformer circuit;
the first high-voltage direct-current output circuit is connected with the rectification output circuit and is used for outputting the voltage output by the rectification output circuit after the voltage is reduced;
and the second high-voltage direct current output circuit is connected with the rectification output circuit and is used for outputting the voltage output by the rectification output circuit after the voltage is reduced.
2. The low-voltage-to-high-voltage conversion power supply for the new energy automobile management system according to claim 1, wherein the first high-voltage direct-current output circuit comprises a first voltage conversion chip and a first direct-current output port, the first voltage conversion chip is connected with an output end of the rectification output circuit, and the first direct-current output port is connected with the first voltage conversion chip.
3. The low-voltage to high-voltage conversion power supply for the new energy automobile management system according to claim 2, wherein a twenty-seventh capacitor, a first inductor and a forty-sixth resistor are further arranged between the first voltage conversion chip and the first direct current output port, one end of each of the twenty-seventh capacitor and the first inductor is connected with a fifth pin of the first voltage conversion chip, the other end of each of the twenty-seventh capacitor and the forty-sixth resistor is connected, the forty-sixth resistor is grounded, the other end of the first inductor is connected with the first pin of the first direct current output port, and the second pin of the first direct current output port is grounded.
4. The low-voltage-to-high-voltage conversion power supply for the new energy automobile management system according to claim 2 or 3, wherein the second high-voltage direct-current output circuit comprises a second voltage conversion chip and a second direct-current output port, the second voltage conversion chip is connected with the output end of the rectification output circuit, and the second direct-current output port is connected with the second voltage conversion chip.
5. The low-voltage to high-voltage conversion power supply for the new energy automobile management system according to claim 4, wherein the rectification output circuit comprises an output filter circuit and a high-voltage output circuit, the output filter circuit is connected with the transformer circuit, the high-voltage output circuit is connected with the output filter circuit, and an output end of the high-voltage output circuit is further connected with the first voltage conversion chip and the second voltage conversion chip U3.
6. The low-voltage-to-high-voltage conversion power supply for the new energy automobile management system according to claim 5, wherein the output filter circuit comprises a twenty-third resistor, a twenty-fifth capacitor and a ninth diode, first ends of the twenty-third resistor and the ninth diode are connected with the transformer circuit, one end of the twenty-fifth capacitor is connected with the twenty-third resistor, the other end of the twenty-fifth capacitor is connected with a second end of the ninth diode, and the second end of the ninth diode is further connected with the high-voltage output circuit.
7. The low-voltage-to-high-voltage conversion power supply for the new energy automobile management system according to claim 6, wherein the high-voltage output circuit comprises a rectifier bridge and a high-voltage direct current output port, the rectifier bridge is connected with the ninth diode and the transformer circuit, the high-voltage direct current output port is connected with the rectifier bridge, and a first pin of the high-voltage direct current output port is connected with a fourth pin of the first voltage conversion chip and a fourth pin of the second voltage conversion chip.
8. The low-to-high voltage conversion power supply for the new energy automobile management system according to claim 7, wherein the transformer circuit comprises a transformer, a primary winding of the transformer is connected with the voltage conversion control circuit, and a secondary winding of the transformer is connected with the ninth diode and the rectifier bridge.
9. The low-to-high voltage conversion power supply for the new energy automobile management system according to claim 8, wherein the voltage conversion control circuit comprises a voltage control chip, a sixth pin of the voltage control chip is connected to a fourth MOS transistor and then connected to the primary winding of the transformer, and a seventh pin of the voltage control chip is connected to the voltage input circuit.
10. The low-voltage to high-voltage conversion power supply for the new energy automobile management system according to claim 9, wherein the voltage input circuit comprises a low-voltage direct current input port and a first diode, one end of the first diode is connected to the low-voltage direct current input port, and the other end of the first diode is further connected to a seventh pin of the voltage control chip and a primary winding of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121199616.8U CN214874244U (en) | 2021-05-31 | 2021-05-31 | Low-voltage to high-voltage conversion power supply for new energy automobile management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121199616.8U CN214874244U (en) | 2021-05-31 | 2021-05-31 | Low-voltage to high-voltage conversion power supply for new energy automobile management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214874244U true CN214874244U (en) | 2021-11-26 |
Family
ID=78902098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121199616.8U Active CN214874244U (en) | 2021-05-31 | 2021-05-31 | Low-voltage to high-voltage conversion power supply for new energy automobile management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214874244U (en) |
-
2021
- 2021-05-31 CN CN202121199616.8U patent/CN214874244U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103633842B (en) | A kind of Single switch oppositely exports secondary molded breadth gain changer | |
| CN203774850U (en) | Multifunctional integrated electric vehicle-mounted charger with mode switch function | |
| CN208386212U (en) | A kind of uninterruptible power supply | |
| WO2021027453A1 (en) | Vehicle integrated charging device and current distribution calculating method thereof | |
| CN107294147A (en) | Onboard charger and vehicle | |
| CN212627185U (en) | Charging circuit of wireless earphone charging device and wireless earphone charging device | |
| CN109194165A (en) | AC-DC power converter | |
| CN214874244U (en) | Low-voltage to high-voltage conversion power supply for new energy automobile management system | |
| CN209888665U (en) | Rear energy storage device of electric automobile | |
| CN203840038U (en) | Multifunctional integrated vehicle charger based on full-controlled devices | |
| CN204905902U (en) | Photovoltaic power supply unit , photovoltaic air conditioning system and car | |
| CN212935784U (en) | Vehicle-mounted AC/DC quick-charging power adapter circuit | |
| CN103427651A (en) | Vehicle power supply system and working method thereof | |
| CN213937521U (en) | Three-stage topological structure charger with high-low voltage output | |
| CN211655781U (en) | Charger conversion circuit | |
| CN211127264U (en) | USB intelligent quick charging circuit | |
| CN110707789A (en) | Charging and discharging converter for battery pack of electric automobile | |
| CN107612352A (en) | One kind is segmented efficient phase shift power supply | |
| CN203589818U (en) | Uninterrupted power supply system for operation of smart vehicle-mounted substation | |
| CN208955725U (en) | A kind of non-isolated charge-discharge system of energy in bidirectional flow | |
| CN207241475U (en) | A kind of wireless charging system for electric automobile | |
| CN201113404Y (en) | Vehicle mounted power inverter | |
| CN204741417U (en) | Electric power maintenance vehicle's vehicle mounted power | |
| CN109624745A (en) | A kind of high-efficiency high-power on-board charging system | |
| CN211859953U (en) | Massage armchair power supply compatible with direct current and alternating current output and massage armchair |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |