CN108141246B - Battery module and method for transmitting data between a monitoring device and a control device - Google Patents
Battery module and method for transmitting data between a monitoring device and a control device Download PDFInfo
- Publication number
- CN108141246B CN108141246B CN201680060097.2A CN201680060097A CN108141246B CN 108141246 B CN108141246 B CN 108141246B CN 201680060097 A CN201680060097 A CN 201680060097A CN 108141246 B CN108141246 B CN 108141246B
- Authority
- CN
- China
- Prior art keywords
- transmission
- battery module
- battery
- power line
- signal coupling
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 79
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/30—Arrangements in telecontrol or telemetry systems using a wired architecture
-
- 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
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a method for transmitting data within a battery module (300) between at least one monitoring device in battery cells (120) and a central battery module control device (140) using both power line transmission (150) and radio transmission (152), wherein existing components of the battery module are used as antennas required for signal coupling-out and signal coupling-in, and the geometry and dimensions of the components are adapted to the wavelength selected for transmission.
Description
Technical Field
The invention relates to a method for data transmission in a battery module between at least one monitoring device of a battery cell and a battery module control device using both power line transmission and radio transmission. The invention also relates to a battery module which is designed to carry out such a method.
Background
In order to monitor system parameters and to adjust the battery state in the battery module, communication between the monitoring and control circuits of the individual battery cells and the central battery module control device is required. In conventional battery packs, a method using galvanically isolated wiring is used for this data transmission.
It is also already prior art to use methods for this data transmission which do not require additional wiring between the battery cell monitoring circuit and the central control device. A well-known method for this is power line transmission, wherein a power line is an electrical path through which electrical power from a source is conducted to a consumer. In this case, the electrical power line is adapted with its electrical properties (e.g., complex impedance) to the requirements of the electrical power transmission from the source to the consumer (e.g., from the battery pack to the motor).
In other known methods, radio transmission is used between the battery cell monitoring device and the central control device.
Disclosure of Invention
A method for data transmission between at least one monitoring device of battery cells of a battery module on the one hand and a central control device of the battery module on the other hand is disclosed, wherein a combination of power line transmission and transmission based on wave propagation is used for the data transmission. In this case, for signal coupling-out and signal coupling-in, the existing battery components are used for transmission based on wave propagation, and these battery components are adapted with respect to their geometry and/or dimensions and/or material properties to the wavelength selected for transmission.
A battery module is also disclosed, which is set up to carry out such a method for data transmission between at least one monitoring device of the battery cells of the battery module and a control device of the battery module.
The dependent claims show preferred embodiments of the invention.
In a preferred embodiment, the wave propagation transmission is a radio transmission.
Advantageously, the antenna for signal coupling required for radio transmission consists of a component of the battery module, which is also used for power line transmission. This is, for example, a connecting element, such as a connecting rail, by means of which power is conducted from the battery cell to a connecting pole of the battery and thus further to the consumer.
The antenna for signal coupling out required for radio transmission is further advantageously composed of components of the battery module, which are also used for power line transmission.
In a preferred embodiment, a signal coupling out with respect to a reference ground (Bezugsmasse) is used.
Advantageously, in radio transmission, direct radiation is used for signal coupling out.
In a further preferred embodiment, the signal coupling out with respect to the reference ground is advantageously carried out by means of a capacitive coupling out.
Preferably, the signal coupling-out and/or signal coupling-in is improved by shaping the battery component used as an antenna, wherein the geometry and dimensions of the battery component used as an antenna are adapted to the wavelength λ selected for transmission, for example according to λ/2 or λ/4. Instead, it may also be advantageous to adapt the transmission frequency to a given geometry and dimensions of the battery component to be used as an antenna.
Furthermore, it is advantageous to add an electrical device to the circuit for improving the tuning with respect to the resonant response of the circuit at the frequency selected for transmission.
It is further advantageous that: in order to insulate the battery components to be used as antennas, such as the battery cell connection elements, materials are used which have a low shielding effect for the radio frequencies selected for transmission, in order to improve the radiation response in this way.
It is further preferred that the spacing between the battery cell cover layer and the battery module housing is reduced or adapted to the wavelength selected for transmission. By these and other measures of suitable shaping of the battery module and of the regions of the battery module housing, the radio transmission in the battery module can be optimized.
An important advantage of the present invention is that: the data are transmitted in parallel on two different paths, so that, for example, in the event of a failure of one signal path or in the event of impaired signal quality on one of the signal paths, communication between the monitoring device of the battery cells and the central battery module control device can still be ensured. In this way, the susceptibility to interference can be significantly reduced compared to purely power line transmission by means of an additional transmission path.
In addition, in a preferred embodiment, the battery module is also designed to carry out the disclosed method.
Drawings
Subsequently, embodiments of the present invention are described in detail with reference to the accompanying drawings. In the drawings:
fig. 1 shows an exemplary schematic diagram of a connection device with power line transmission of battery cells within a battery module;
fig. 2 shows an exemplary schematic diagram of a connection device with radio transmission of battery cells within a battery module;
fig. 3 shows an exemplary schematic diagram of a connection arrangement of battery cells within a battery module with power line transmission and radio transmission between power line sections;
FIG. 4 shows an exemplary schematic diagram of a connection arrangement of battery cells within a battery module with power line transmission and radio transmission between the power line section and the battery module housing portion;
fig. 5 shows an exemplary schematic diagram of a connection arrangement of battery cells within a battery module with power line transmission and radio transmission using capacitive devices for signal coupling-out;
fig. 6 shows an exemplary schematic diagram of a connection device of battery cells within a battery module with interrupted power line transmission and, as an alternative, radio transmission.
Detailed Description
Fig. 1 shows a schematic view of a battery module 100, the battery module 100 having a battery module housing 110, a negative terminal 112 and a positive terminal 114. In battery module housing 110, a first battery cell 120a is arranged with a first positive terminal 122a and a first negative terminal 124a, a second battery cell 120b is arranged with a second positive terminal 122b and a second negative terminal 124b, a third battery cell 120c is arranged with a third positive terminal 122c and a third negative terminal 124c, and a fourth battery cell 120d is arranged with a fourth positive terminal 122d and a fourth negative terminal 124 d. In the illustrated example in fig. 1, the battery cells are connected to one another in such a way that first positive terminal 122a of first battery cell 120a is connected to second negative terminal 124b of second battery cell 120b by means of first connecting element 130a, second positive terminal 122b of second battery cell 120b is connected to third negative terminal 124c of third battery cell 120c by means of second connecting element 130b, and third positive terminal 122c of third battery cell 120c is connected to fourth negative terminal 124d of fourth battery cell 120d by means of third connecting element 130 c. The first negative connection terminal 124a of the first battery cell 120a is connected to the negative connection terminal 112 of the battery module 100 via a fourth connection element 130d, and the fourth positive connection terminal 122d of the fourth battery cell 120d is connected to the positive connection terminal 114 of the battery module 100 via a fifth connection element 130 e. The connecting elements 130a, …, 130e may be, for example, connecting rails.
As can be further seen from fig. 1, the connecting elements 130a, …, 130e, which essentially conduct the electrical power from the battery cells 120a, …, 120d to the battery poles 112 and 114, also represent sections of the electrical power line for the electrical power line transmission 150 between the monitoring devices in the battery cells 120a, …, 120d and the central battery module control device 140. Thus, by means of this power line transmission, the central battery module control device 140 may exchange data with the monitoring device in each of the battery cells 120a, …, 120 d.
Fig. 2 shows a schematic illustration of a battery module 200, which battery module 200 is constructed similarly to the battery module 100 from fig. 1. Thus, the description of all of the identical components has not been repeated for the sake of brevity. Unlike the battery module 100 from fig. 1, the battery module 200 in fig. 2 uses radio transmissions 252a, 252b for data transmission between the monitoring devices in the battery cells 120a, …, 120d and the central battery module control device 140. To this end, the first battery cell 120a has a first transmitting/receiving means 210a, the second battery cell 120b has a second transmitting/receiving means 210b, the third battery cell 120c has a third transmitting/receiving means 210c and the fourth battery cell 120d has a fourth transmitting/receiving means 210 d. Furthermore, the central battery module control device 140 also has a central transmitting/receiving device 220. Thus, by means of this radio transmission 252a, 252b, the central battery module control means 140 may exchange data with the monitoring means in each of the battery cells 120a, …, 120 d.
Fig. 3 shows a schematic view of a battery module 300, which battery module 300 is constructed similarly to the battery module 100 from fig. 1. Thus, the description of all of the identical components has not been repeated for the sake of brevity. As can be seen from fig. 3, in the battery module 300, a combination of power line transmission 150 and radio transmission 352 is used for data exchange between the battery cells 120a, …, 120d and the central battery module control device 140. Here, the power line transmission 150 is the same as that in the battery module 100 from fig. 1.
A portion of the power modulated onto the power line is radiated by a section of the power line and re-coupled in by other sections. This applies in particular to geometrically large objects, that is to say objects with dimensions on the order of the wavelength λ selected for transmission. That is to say for example for:
λ = c/f, wherein
c = speed of light in medium (e.g. about 3e in vacuum)8m/s) and
f = the frequency of the frequency band,
a wavelength of about 3m is obtained with an exemplary frequency of 100 MHz. Thus, for example, by a meander-shaped arrangement of the battery cell connection elements, a power line signal path in the range of wavelengths selected for transmission may be achieved. Other advantageous geometries are obtained, for example for lambda/2 or lambda/4.
For the purpose of radio transmission 152, fig. 3 shows, by way of example, a signal coupling-out by direct radiation of the first battery cell connection element 130a and a signal coupling-in into the third battery cell connection element 130 c.
Fig. 4 shows a schematic view of a battery module 400, which battery module 400 is constructed similarly to battery module 100 from fig. 1. Thus, the description of all of the identical components has not been repeated for the sake of brevity. As can be seen from fig. 4, in the battery module 400, a combination of power line transmission 150 and radio transmission 452a, 452b is used for data exchange between the battery cells 120a, …, 120d and the central battery module control device 140, using a reference ground 460. Here, the power line transmission 150 is the same as that in the battery module 100 from fig. 1. In the example shown, the reference ground 460 is connected to the battery module housing 110. For the purpose of radio transmission 452a, 452b, fig. 4 shows by way of example the coupling out of signals caused by direct radiation from the first battery cell connection element 130a into the battery module housing 110 and from the battery module housing 110 into the battery cell connection element 130 c. In this embodiment, the reflective properties of the battery module housing 110 may be positively utilized for radio transmission.
Fig. 5 shows a schematic view of a battery module 500, said battery module 500 being constructed similarly to the battery module 400 from fig. 4. Thus, the description of all of the identical components has not been repeated for the sake of brevity. As can be seen from fig. 5, in the battery module 500, a combination of power line transmission 150 and radio transmission 452b is used for data exchange between the battery cells 120a, …, 120d and the central battery module control device 140, using the reference ground 160. Here, the power line transmission 150 is the same as that in the battery module 100 from fig. 1. In the illustrated example, the reference ground 160 is connected with the battery module housing 110. Fig. 5 exemplarily shows a signal coupling output from the first battery cell connection element 130a into the battery module housing 110 via capacitive coupling through a capacitor 510, which capacitor 510 is arranged between the first battery cell connection element 130a and the battery module housing 110. The battery module housing 110 radiates the signal to be transmitted to another location so that it can be recoupled by the battery cell connection element 130 c.
Fig. 6 shows a schematic view of a battery module 600, which battery module 600 is constructed similarly to the battery module 300 from fig. 3. Thus, the description of all of the identical components has not been repeated for the sake of brevity. As can be seen from fig. 6, in the battery module 600, a combination of power line transmission 150 and radio transmission 352 is used for data exchange between the battery cells 120a, …, 120d and the central battery module control device 140. As can be further seen from fig. 6, the battery cell connection element 130b between the second battery cell 120b and the third battery cell 120c is interrupted, so that the power line signal path 150 is interrupted. Such interruptions may for example be formed by corrosion. In the example shown in fig. 6, the first battery cell connection element 130a also radiates the signal to be transmitted directly, and this signal can be recoupled by the third battery cell connection element 130 c. Thus, despite the interruption of the power line signal path 150, it is possible to maintain the data exchange between all battery cells 120a, …, 120d and the central battery module control means 140.
For further disclosure of the invention, reference is hereby made to the illustrations in fig. 1 to 6, in addition to the text-form disclosure above.
Claims (8)
1. A method for data transmission between at least one monitoring device of battery cells of a battery module and a central battery module control device of the battery module, wherein a combination of power line transmission and wave propagation-based transmission is used for the data transmission,
wherein for signal coupling-out and signal coupling-in a power line section is used for wave propagation-based transmission, which is radio transmission, and the antenna for signal coupling-in and signal coupling-out required for the radio transmission consists of a power line section, which is also used for the power line transmission,
it is characterized in that the preparation method is characterized in that,
a part of the power modulated onto the power line for power line transmission is radiated by the power line section and re-coupled in by other sections, and
the size of the power line segment is adapted to the wavelength selected for transmission.
2. The method according to claim 1, characterized in that the coupling-out from the battery connection element to the reference ground is used for the signal coupling-out.
3. Method according to one of claims 1 to 2, characterized in that in the radio transmission, the direct radiation of one battery connection element and the signal coupling-in to the other battery connection element are used for the signal coupling-out.
4. The method of claim 2, wherein the signal coupling out with respect to the reference ground is performed by a capacitive coupling out.
5. Method according to one of claims 1 to 2, characterized in that an electric device is added to the circuit for improving the tuning with respect to the resonant response of the circuit at the frequency selected for transmission.
6. Method according to one of claims 1 to 2, characterized in that for insulating the power line section to be used as antenna, a material is used which has a low shielding effect for the frequencies selected for transmission.
7. Method according to one of claims 1 to 2, characterized in that the spacing between the battery cell cover layer and the battery module housing is reduced or adapted to the wavelength selected for transmission.
8. Battery module, which is set up to carry out a method for data transmission between at least one monitoring device of the battery cells of the battery module and a control device of the battery module according to one of the preceding claims.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015220209.7 | 2015-10-16 | ||
| DE102015220209.7A DE102015220209A1 (en) | 2015-10-16 | 2015-10-16 | Internal battery communication through powerline and radio transmission using battery components as antennas |
| PCT/EP2016/073588 WO2017063908A1 (en) | 2015-10-16 | 2016-10-04 | Communication inside the battery by powerline and wireless transmission using battery components as antennas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108141246A CN108141246A (en) | 2018-06-08 |
| CN108141246B true CN108141246B (en) | 2021-03-23 |
Family
ID=57044971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680060097.2A Active CN108141246B (en) | 2015-10-16 | 2016-10-04 | Battery module and method for transmitting data between a monitoring device and a control device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108141246B (en) |
| DE (1) | DE102015220209A1 (en) |
| WO (1) | WO2017063908A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020062078A1 (en) * | 2018-09-28 | 2020-04-02 | 深圳市汇顶科技股份有限公司 | Circuit and electronic device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2350369T3 (en) * | 2005-10-06 | 2011-01-21 | Masternaut | INFORMATION READING DEVICE IN NUMBER BUS WITHOUT WIRELESS CONNECTION TO THE NETWORK. |
| WO2012034045A1 (en) * | 2010-09-10 | 2012-03-15 | Johnson Controls Technology Company | Vehicle battery monitoring system |
| CN102810878A (en) * | 2011-05-30 | 2012-12-05 | 苏州润源电气技术有限公司 | Intelligent battery module and method and system for achieving precise management of monomer power batteries |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004018581A1 (en) * | 2004-04-16 | 2005-11-10 | Honeywell Technologies Sarl | Antenna arrangement for mobile or stationary radio communication |
| US20110270476A1 (en) * | 2008-07-08 | 2011-11-03 | Siemens Aktiengesellschaft | Adapter device and method for charging a vehicle |
| CN103052529B (en) * | 2010-10-05 | 2015-09-23 | 三菱电机株式会社 | Battery charge controller |
| DE102012203456A1 (en) * | 2012-03-05 | 2013-09-05 | Robert Bosch Gmbh | Galvanic element and battery control system |
| DE102013201165A1 (en) * | 2013-01-24 | 2014-07-24 | Robert Bosch Gmbh | Electrical energy system with structure-borne sound monitoring |
-
2015
- 2015-10-16 DE DE102015220209.7A patent/DE102015220209A1/en active Pending
-
2016
- 2016-10-04 CN CN201680060097.2A patent/CN108141246B/en active Active
- 2016-10-04 WO PCT/EP2016/073588 patent/WO2017063908A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2350369T3 (en) * | 2005-10-06 | 2011-01-21 | Masternaut | INFORMATION READING DEVICE IN NUMBER BUS WITHOUT WIRELESS CONNECTION TO THE NETWORK. |
| WO2012034045A1 (en) * | 2010-09-10 | 2012-03-15 | Johnson Controls Technology Company | Vehicle battery monitoring system |
| CN102810878A (en) * | 2011-05-30 | 2012-12-05 | 苏州润源电气技术有限公司 | Intelligent battery module and method and system for achieving precise management of monomer power batteries |
Non-Patent Citations (2)
| Title |
|---|
| DAMIAN ALONSO ET AL.迈向无线电池管理系统：电池模拟器内部天线和无线电信道测量的评估.《2014 IEEE 80TH车辆技术会议》.2014, * |
| 迈向无线电池管理系统：电池模拟器内部天线和无线电信道测量的评估;DAMIAN ALONSO ET AL;《2014 IEEE 80TH车辆技术会议》;20140901;正文第1-5页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108141246A (en) | 2018-06-08 |
| WO2017063908A1 (en) | 2017-04-20 |
| DE102015220209A1 (en) | 2017-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110110404A1 (en) | Communication system and communication apparatus | |
| JP2014197805A (en) | Battery system | |
| WO2007069367A1 (en) | Antenna device | |
| JP2007228254A (en) | Interrogator of wireless tag communication system | |
| JP2008244701A (en) | Power line communication system | |
| US10686241B2 (en) | Board-to-board interconnect apparatus including a microstrip circuit connected by a waveguide, where a bandwidth of a frequency band is adjustable | |
| JP2013543708A (en) | Wireless information transmission apparatus, communication terminal for wireless information transmission, and impedance matching method | |
| CN104541407A (en) | Dual polarization antenna including isolation providing device | |
| CN108141246B (en) | Battery module and method for transmitting data between a monitoring device and a control device | |
| Pathak et al. | Magnetic induction communication based transceiver coil and waveguide structure modeling for non-conventional WSNs | |
| JP2010160978A (en) | High-frequency signal transmission system, high-frequency signal transmission connector, and high-frequency signal transmission cable | |
| CN107215315B (en) | Rear door and glass antenna | |
| JP2018191328A (en) | Enhanced connected tiled array antenna | |
| US9530031B2 (en) | Position detection system | |
| CN101867096B (en) | System and method for generating a reference signal for phase calibration of a system | |
| CN107135012A (en) | A kind of carrier aggregation radio circuit and mobile terminal | |
| CN105529534A (en) | Electronic device | |
| EP2270926B1 (en) | An active antenna element | |
| CN108886378B (en) | Front-end circuit and high-frequency module | |
| KR102059329B1 (en) | Ultra wideband dipole antenna | |
| US8847697B2 (en) | Communication system | |
| Hui et al. | Mutual coupling in antenna arrays | |
| US8700375B2 (en) | Electromagnetic coupler, wireless terminal including same, and method for designing electromagnetic couplers | |
| US10680333B2 (en) | Loop antenna | |
| US10149636B2 (en) | Relay device for relaying radio frequency signals received from an antenna implanted within a patient's body to another device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |