JP2010183705A - Method of testing power transmission apparatus or power receiving apparatus, power transmission apparatus, power receiving apparatus and non-contact power transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably and accurately execute a confirmation test for authentication processing executed between a power transmission apparatus and a power receiving apparatus in a non-contact power transmission system, and reliably inspect a function related to detection of a foreign matter in the power transmission apparatus and the power receiving apparatus. <P>SOLUTION: In an inspection method of the power transmission apparatus 200 for supplying power to the power receiving apparatus 300 via a primary coil L1 and a secondary coil L2 which are electromagnetically coupled, or for the power receiving apparatus 300, an inspection sample as any one of the power transmission apparatus 200 and the power receiving apparatus 300 is opposed to a reference as the other, communication is performed between the inspection sample and the reference, an high-order device reads the information stored as a result of the communication in a first memory in the inspection sample via an interface section in the inspection sample, and thus, the authentication processing function or the foreign matter detecting function is tested. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a test method for a power transmission device or a power reception device, a power transmission device, a power reception device, a contactless power transmission system, and the like.

  In recent years, contactless power transmission (contactless power transmission) that uses electromagnetic induction and enables power transmission even without a metal part contact has been highlighted. Charging of telephones and household equipment (for example, a handset of a telephone) has been proposed. Such conventional technology of contactless power transmission is described in, for example, Patent Document 1.

  The non-contact power transmission system of Patent Literature 1 includes a power transmission device (primary side module) and a power reception device (secondary side module). Moreover, in the non-contact power transmission system described in Patent Document 1, after performing ID authentication processing by transmitting and receiving an authentication code between the power transmission device and the power receiving device, and passing ID authentication, the power transmission device The primary coil is continuously driven to start normal power transmission to the power receiving apparatus.

JP 2006-60909 A

  In order to market a power transmission device, a manufacturer needs to perform various tests to guarantee the performance, quality, reliability, safety, and the like of the power transmission device as a product. However, in the prior art, mass-productivity is not taken into consideration for the shipment inspection of the power transmission device (primary side module) and the power reception device (secondary side module) constituting the contactless power transmission system. And an efficient test of the power receiving device cannot be performed.

  For example, the power transmission device executes temporary power transmission when the power-receiving-side device reaches a predetermined area, executes authentication processing with the power receiving device, and performs normal power transmission (continuous power transmission) after passing the authentication processing. The authentication process is a process for determining compatibility between the power transmission device and the power reception device, and is deeply involved in safety. Therefore, it is important to confirm the suitability of the authentication processing function before shipping the product.

  In particular, a multi-power transmission system capable of transmitting power to a plurality of different types of power receiving devices (secondary side modules; for example, modules for mobile terminals, modules for computer terminals, etc.) by a single power transmitting device (primary side module). In order to achieve this, the consistency of power transmission standards / coils (rated power) / system parameters (for example, safety parameters such as foreign object detection threshold values) between the power transmitting device and the power receiving device is accurately determined. The authentication process is extremely important. However, since the authentication process is complicated, it is difficult to test the authentication process function with the conventional technology.

  For example, the fact of whether or not the authentication process can be passed can be temporarily determined depending on whether or not the power transmission device has shifted from the temporary power transmission state to the normal power transmission state.

  However, it is not enough to know the fact that authentication has passed or not. For example, when multiple processes are included in the authentication process, it is possible to accurately grasp which stage of the process has been passed. desirable.

  In the case of a multi-power transmission system, for example, if the group numbers of authentication IDs match between the power transmission device and the power receiving device, even if individual specific ID authentication codes do not exactly match. The authentication process may be passed. For example, when one power transmission device corresponds to a version 1 power receiving device, a version 2 power receiving device, or a version 3 power receiving device of a predetermined standard, the power receiving device is any one of version 1 to version 3 For example, the authentication process may be passed even if the coil ID codes do not match. However, from the viewpoint of strictly ensuring the reliability and safety of the system, products that do not match the individual ID authentication codes (such as the above-mentioned coil ID) in the inspection of products before shipment are not acceptable. It is desirable that it can be reliably selected as a good product.

  That is, it is necessary to have a technique for clearly testing the accurate status of the authentication process, which indicates whether or not the authentication process has passed, and the accuracy of the authentication information itself exchanged by the authentication process.

  In contactless power transmission systems, safety is extremely important, and measures against foreign objects are particularly important, so inspections of functions related to foreign object detection in power transmission devices and power receiving devices must be carefully performed before shipping the product. There is a need to do.

  For example, if there is a foreign object between the primary coil and the secondary coil during the temporary power transmission period (period during which the authentication process is performed), it is necessary to confirm at the inspection stage that the presence of the foreign object can be reliably detected. . In addition, for example, a foreign object may be inserted between the primary coil and the secondary coil after normal power transmission is started. Therefore, whether or not the insertion of the foreign object can be reliably detected. It is also important to confirm this at the inspection stage.

  According to some aspects of the present invention, for example, a confirmation test of an authentication process performed between a power transmission device and a power reception device can be performed reliably and with high accuracy. Functions relating to foreign object detection can also be reliably inspected, and therefore, for example, a practical test technique can be established for a non-contact power transmission system that supports multi-power transmission.

  (1) One aspect of a test method for a power transmission device or a power reception device according to the present invention is a power transmission device that supplies power to a power reception device via an electromagnetically coupled primary coil and secondary coil, or an inspection method for the power reception device. The test sample that is one of the power transmission device and the power receiving device is opposed to the reference that is the other of the power transmission device and the power reception device, and communication is performed between the test sample and the reference. The host device reads out the information stored in the first storage unit in the test sample as a result of the communication via the interface unit in the test sample, and thereby tests the test sample. Do.

  In this aspect, a test (opposite test) in a state where the power transmitting device and the power receiving device are arranged to face each other is executed. One of the power transmission apparatus and the power reception apparatus is an “inspection sample”, and the other is a reference. “Inspection sample” is “apparatus to be tested”, and “reference” is, for example, “an apparatus whose characteristics and functions are guaranteed and whose characteristics and functions constitute an inspection system. This is a device that provides the standard of inspection as grasped by (host computer etc.).

  With the test sample and reference facing each other, communication is actually performed between the two, and as a result of the communication, data (parameters, codes, status information, operation stored in the first storage unit of the test sample) (History information etc.) is read out by the host device (external device) related to the test.

  As a result, for example, the accuracy of the data can be determined by comparing the data obtained by communication with the expected value, and the operation history (for example, which of the multiple stages of processing can be completed) And whether or not a desired operation has been executed or whether or not a communication error has occurred can be comprehensively confirmed.

  (2) In another aspect of the power transmission device or power reception device test method of the present invention, the communication includes authentication information in an authentication process executed before the power transmission device starts normal power transmission to the power reception device. Communication for exchanging, communication of foreign object detection threshold information for detecting foreign objects existing between the primary coil and the secondary coil, executed at the time of the authentication process, and after the normal power transmission At least one of the executed communications for detecting foreign matter existing between the primary coil and the secondary coil is included.

  This confirms whether the authentication process is being executed correctly, confirms the foreign object detection function using the foreign object detection threshold sent from the reference side during the authentication process, and transmits power from the power receiving side during the normal power transmission period. It is possible to confirm the foreign object detection function (so-called periodic authentication function) using intermittent communication to the side. The “authentication process” is a process for confirming the consistency between the characteristics of the power transmission apparatus and the characteristics of the power reception apparatus.

  (3) In another aspect of the power transmission device or power reception device test method of the present invention, the communication includes authentication information in an authentication process executed before the power transmission device starts normal power transmission to the power reception device. The authentication information includes ID information related to at least one of a standard / coil / system between the power transmission device and the power reception device.

  For example, in a non-contact power transmission system that supports multi-power transmission, a single power transmission device needs to support a plurality of power receiving devices with different power ratings. It is necessary to confirm the coincidence using the ID information. This aspect clarifies this point.

  (4) According to another aspect of the power transmission device or power reception device test method of the present invention, the authentication information further includes threshold information for foreign object detection, and between the power transmission device and the power reception device. , Information on the corresponding function and setting information for each application are included, and the authentication process authenticates at least one standard / coil / system conformity between the power transmission device and the power reception device. And first authentication processing for exchanging threshold information for detecting the foreign matter, exchanging information about the corresponding function between the power transmission device and the power receiving device, and setting for each application And a second authentication process for exchanging information.

  In this aspect, the authentication process includes a plurality of authentication processes (first authentication process and second authentication process). Even if the authentication process is composed of multi-stage processes and the process contents are complicated, as described above, the information of the result of actual communication is read, and the accurate information is based on the read information. Since judgment can be made, a highly reliable and highly accurate test can be executed.

  (5) In another aspect of the power transmission device or power reception device test method of the present invention, the host device reads the authentication processing pass history information stored in the first storage unit, whereby the authentication processing is performed. Perform a pass confirmation test.

  By reading the passage history information stored in the first storage unit, for example, even when the authentication process is composed of a plurality of processes, it is possible to determine pass / non-pass for each process.

  (6) In another aspect of the power transmitting device or power receiving device testing method of the present invention, the host device stores the authentication information transmitted from the reference, stored in the first storage unit, in the first storage unit. A verification test of the authentication process is performed by reading from a predetermined address of one storage unit and collating with an expected value.

  Whether or not the data sent from the other party is stored at the correct address of the first storage unit by reading the data stored in the first storage unit and collating the read data with the expected value, In addition, it can be determined whether or not the data is accurate.

  (7) In another aspect of the power transmission device or power reception device test method of the present invention, the inspection sample includes a second storage unit that stores the authentication information to be transmitted to the reference, The higher-level device reads the authentication information stored in the second storage unit for transmission to the reference from a predetermined address of the second storage unit, and collates it with an expected value. Conduct a confirmation test.

  Read the data stored in the second storage unit, whether or not the data to be sent to the other party is stored at the correct address of the second storage unit by collating the read data with the expected value, and It can be determined whether the data is accurate.

  (8) In another aspect of the power transmission device or power reception device testing method of the present invention, the host device performs a communication error confirmation test by reading communication error history information stored in the first storage unit. .

  Thereby, the occurrence of a communication error can be confirmed.

  (9) In another aspect of the power transmission device or power reception device test method of the present invention, when the reference is a power reception device and the test sample is a power transmission device, the power reception device as the reference is the 2 Based on the signal obtained from the coil end of the secondary coil, a position level signal corresponding to the positional relationship between the primary coil and the secondary coil is acquired, and the acquired position level signal is transmitted to the power transmission device as the inspection sample. Transmitting, the host device performs a test of the position detection function of the power transmission device as the test sample by reading the position level signal stored in the first storage unit in the power transmission device, In the case where the reference is a power transmission device and the test sample is a power reception device, the power reception device as the test sample is the 2 Based on a signal obtained from the coil end of the coil, a position level signal corresponding to the positional relationship between the primary coil and the secondary coil is acquired, and the acquired position level signal is transmitted to the power transmission device as the reference. The host device executes a test of the position detection function of the power receiving device as the test sample by reading the position level signal stored in the first storage unit in the power transmitting device.

  If the distance (relative positional relationship) between the primary coil and the secondary coil is within the allowable range, power transmission from the power transmission device to the power reception device is possible. Power transmission is not possible. Therefore, when the landing (setting) of the device including the power receiving device is detected, the power receiving device and the power transmitting device check the position level based on a signal obtained from the coil end of the secondary coil, for example, and the primary coil. When it is determined that the distance (relative positional relationship) between the coil and the secondary coil is not within the allowable range, the power transmission device stops temporary power transmission (continuous power transmission before normal power transmission) and returns to a standby state. Execute. Therefore, it is important to test before shipping whether or not both the power transmitting apparatus and the power receiving apparatus can properly detect the position level.

  The test of the position detection function can be performed as follows, for example. That is, the amount of positional deviation between the primary coil and the secondary coil is set within an allowable range (or an unacceptable range), and the power transmission device and the power reception device are opposed to each other. After that, the host device (tester, host, etc.) reads the position level information from the first storage unit of the power transmission device and determines whether the position detection function is functioning correctly. . For example, when the position level read from the first storage unit is less than the allowable level even though the amount of positional deviation between the primary coil and the secondary coil is set within the allowable range. Can determine that at least one of the position detection function of the power transmission device and the position detection function of the power reception device is not functioning properly (that is, there is some abnormality in one of the devices).

  Here, the “position detection function of the power transmission device” properly receives, for example, a position level signal transmitted from the power reception device, appropriately converts the received position level signal into a digital signal (if necessary, And determining whether or not the position level is appropriate), and storing the position level signal (and the signal indicating the determination result of the position level) at an appropriate address in the memory (first storage unit, etc.) This is a function related to position detection provided in the power transmission device. Further, the “position detection function of the power receiving apparatus” appropriately detects the level of the coil end signal (for example, coil end voltage) of the secondary coil, and uses a signal indicating the level of the coil end signal as a position level signal. This is a function related to position detection provided in the power receiving device, such as transmitting to the power transmitting device using load modulation or the like.

  (10) According to another aspect of the power transmission device or power reception device test method of the present invention, when the power reception device is a reference and the power transmission device is a test sample, the power transmission device as the test sample is Based on a coil end signal obtained from the coil end of the primary coil and transmitted from the power receiving device as the reference in at least one of the period during which the authentication process is performed and the period during which the normal power transmission is performed. In addition, the presence / absence of foreign matter between the primary coil and the secondary coil is detected using the foreign matter detection threshold information as a detection reference, and the host device is stored in the first storage unit. The foreign object detection result information is read out, thereby performing a test of the foreign object detection function of the power transmission apparatus as the inspection sample, and the power transmission apparatus When the power receiving device is a test sample, the power transmission device as the reference is configured such that the primary coil is in at least one of a period during which the authentication process is performed and a period during which the normal power transmission is performed. The primary coil and the secondary coil based on a coil end signal obtained from the coil end and using the foreign object detection threshold information transmitted from the power receiving device as the reference as a detection reference. The host device reads out the foreign object detection result information stored in the first storage unit, thereby executing the test of the foreign object detection function of the power receiving device as the inspection sample. To do.

  Since the foreign object detection function provided in the power transmission device and power reception device is directly related to the safety and reliability of the contactless power transmission system, it is not possible to test the foreign object detection function of the power transmission device and power reception device before shipping. is important. The foreign object detection is desirably performed, for example, in both a normal power transmission period (a period in which power transmission is performed in accordance with an original purpose such as battery charging) and an authentication period before the start of normal power transmission.

  The foreign object detection can be performed based on, for example, the voltage level of the coil end signal of the power transmission device. For example, a signal obtained from the coil end of the primary coil when the primary coil and the secondary coil are electromagnetically coupled without foreign matter and when foreign matter is present between the primary coil and the secondary coil. The voltage level of (coil end signal), the phase state of the current with respect to the timing of the drive clock (primary coil drive voltage) of the primary coil, and the like are different. Therefore, the presence of a foreign object can be detected based on the coil end signal of the primary coil.

  In addition, when there is a foreign object, at least a part of the power transmitted from the power transmission device does not reach the power reception device, and the power reception level in the power reception device decreases beyond an allowable range. The foreign object detection can also be executed. For example, when the power receiving apparatus detects a foreign object, the power receiving apparatus thereafter stops transmission by load modulation to the power transmitting apparatus side that should be performed. The power transmission device monitors the load state on the power reception device side based on the coil end signal (that is, if a signal is sent from the power reception device side by load modulation, it can be received and detected immediately) Therefore, it is possible to recognize that a foreign object has been detected by not transmitting a signal to be transmitted within an allowable time.

  In addition, after normal power transmission is started, for example, the power receiving device transmits a foreign object detection signal having a predetermined pattern intermittently (for example, periodically or periodically) to the power transmitting device. Based on the coil end signal obtained from the coil end, the presence / absence of a foreign object can be detected based on whether or not the foreign object detection signal can be received.

  In addition, the detection of the presence or absence of a foreign object is determined in consideration of an appropriate foreign object detection threshold value (for example, transmission power and required degree of reliability) corresponding to the contactless power transmission system used. Preferably). Therefore, for example, by performing foreign object detection using threshold information for foreign object detection sent from the power receiving device during the authentication period, desired foreign object detection accuracy and the like can be ensured.

  The test of the foreign object detection function of the power transmission device and the power reception device can be performed as follows, for example. For example, the power transmitting device and the power receiving device are arranged to face each other, and a predetermined metal foreign object (size, electrical characteristics, etc. are known) is installed (or not installed) between the primary coil and the secondary coil. In this state, the power transmission device performs temporary power transmission and normal power transmission, and the power transmission device and the power reception device perform operations related to foreign object detection. For example, the power receiving apparatus transmits appropriate foreign object detection threshold value information to the power transmission apparatus, and the power transmission apparatus uses the foreign object detection threshold value sent from the power receiving apparatus from the coil end of the primary coil. Based on the obtained coil end signal, foreign matter detection (foreign matter detection during authentication processing, foreign matter detection after normal power transmission, etc.) is executed. Thereafter, the host device (tester, host, etc.) reads out the foreign object detection result information (for example, the foreign object detection flag) from the first storage unit of the power transmission device, and can detect the foreign object accurately (or no foreign object exists). Regardless, it is confirmed that there is a foreign object).

  As a result, it is possible to confirm before shipping whether the foreign matter detection function of the power transmission device is appropriate (whether the foreign matter can be reliably detected, whether there is a false detection, etc.), and foreign matter detection of the power receiving device. Whether the function is appropriate (whether it is a power receiving device that can properly operate a circuit or the like related to foreign object detection of the power transmitting device, or whether the power receiving device itself can accurately detect a foreign object). Can be confirmed before shipment.

  (11) In another aspect of the method for testing a power transmitting device or a power receiving device of the present invention, foreign object detection during a period in which the authentication process is performed is performed by changing the power transmitting device as a reference or an inspection sample according to the presence or absence of a foreign material. Is performed by detecting at least one of a voltage level of a coil end signal of the primary coil and a phase characteristic of the coil end signal of the primary coil with reference to the drive signal of the primary coil, In the period during which normal power transmission is performed, the foreign object detection is performed by receiving the signal intermittently transmitted from the power receiving device as a reference or inspection sample based on the coil end signal. This is done by detecting whether or not it can be done.

  An example of the confirmation test of the foreign matter detection function is clarified. In the period before normal power transmission is performed (period in which authentication processing in a broad sense is performed (authentication period)), foreign object detection based on the voltage level and phase characteristics of the coil end signal obtained from the primary coil is reliably performed. To see if Further, in the normal power transmission period, it is confirmed whether foreign object detection by foreign object detection (so-called periodic authentication) using intermittent communication from the power receiving side to the power transmission side is reliably performed. However, the example of this aspect is an example, and the foreign object detection method is not limited to the example of this aspect.

  (12) In another aspect of the power transmission device or the power reception device test method of the present invention, a plurality of power reception devices as a reference are prepared, and the characteristics of the power reception device and the foreign object detection threshold are provided for each prepared power reception device. Each information is made different, and the presence or absence of the foreign matter is detected in a state where each of the prepared plurality of power receiving devices faces a power transmitting device as a test sample. The foreign object detection function confirmation test is performed by reading out the foreign object detection result information for each of the plurality of power receiving devices stored in the unit.

  In this aspect, a plurality of references having different characteristics (power rating, etc.) and applied foreign object detection threshold values are prepared, and whether or not appropriate foreign object detection is possible is confirmed for each reference. This makes it possible to confirm the effectiveness of the foreign object detection function for references having different characteristics and the like.

  (13) In another aspect of the power transmission device or power reception device test method of the present invention, the power transmission device as a reference performs normal power transmission on the power reception device as a test sample, and in a period after the normal power transmission. By storing the operation history information of the power receiving device in the first storage unit in the power receiving device, the host device reads the operation history information of the power receiving device stored in the first storage unit, Perform an operation check test after normal power transmission.

  By storing the operation history information of the power receiving apparatus after normal power transmission in the first storage unit and reading the operation history information to the outside, an operation confirmation test of the power receiving apparatus after normal power transmission can be realized.

  (14) One aspect of the power transmission device of the present invention is the power transmission device in a non-contact power transmission system that supplies power from the power transmission device to the power reception device via an electromagnetically coupled primary coil and secondary coil. The first storage unit and the interface unit used when executing any one of the power transmission device or power reception device test methods described above.

  As a result, a highly reliable power transmission device (primary module) and power reception device (secondary module) having a circuit configuration that enables testing before shipment can be realized.

  (15) One aspect of the power receiving device of the present invention is the power receiving device in a non-contact power transmission system that supplies power from the power transmitting device to the power receiving device via an electromagnetically coupled primary coil and secondary coil. The first storage unit and the interface unit used when executing any one of the power transmission device or power reception device test methods described above.

  As a result, a highly reliable power transmission device (primary module) and power reception device (secondary module) having a circuit configuration that enables testing before shipment can be realized.

  (16) One aspect of the contactless power transmission system of the present invention includes the above power transmission device and the above power reception device.

  As a result, a contactless power transmission system with high reliability and high practical value can be realized.

  As described above, according to some aspects of the present invention, for example, a verification test of an authentication process performed between a power transmission device and a power reception device can be performed with high accuracy. The function related to the foreign object detection of the apparatus can also be surely inspected. Therefore, for example, a practical test technique can be established for a non-contact power transmission system that supports multi-power transmission. In addition, for example, a highly reliable power transmission device (primary side module) and power reception device (secondary side module) having a circuit configuration that enables a test before shipment can be realized. In addition, for example, a contactless power transmission system with high reliability and high practical value can be realized.

The figure which shows the example of a test regarding a power transmission apparatus, and the structural example of a test system The figure which shows the normal operation example of the non-contact electric power transmission system The figure which shows the outline | summary of operation | movement (internal state) of the power transmission apparatus shown by FIG. The figure which shows the outline | summary of the procedure of the test method (opposite test method) of the power transmission apparatus or power receiving apparatus of this invention Diagram for explaining the contents of the negotiation confirmation test Diagram for explaining the contents of the setup confirmation test Diagram for explaining the contents of the Nego & Setup Pass Confirmation Test Diagram for explaining the contents of the ROM data read confirmation test for negotiation and setup Diagram for explaining the contents of the position tolerance verification test during negotiation and setup Diagram for explaining the foreign matter detection function confirmation test during negotiation and setup Diagram for explaining the contents of a foreign object detection function test during normal power transmission The figure which shows the internal structural example of a power transmission apparatus and a power receiving apparatus Diagram showing a configuration example of the test register Diagram for explaining test mode settings Flow chart for explaining specific operations of power transmission device and power reception device Flow chart for explaining specific operations of power transmission device and power reception device

  Next, embodiments of the present invention will be described with reference to the drawings. Note that the present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are as means for solving the present invention. It is not always essential.

(First embodiment)
In this embodiment, an example of a power transmission device test, and a configuration example and an operation example of a power transmission device having a first forced power transmission mode and a second forced power transmission mode will be described.

(Example of tests for power transmission equipment, etc.)
FIG. 1 is a diagram illustrating a test example relating to a power transmission device and a configuration example of a test system. FIG.
The test system shown in (1) executes a test (opposite test) in a state where the power transmitting device and the power receiving device are arranged to face each other.

  One of the power transmission device 200 and the power reception device 300 is an “inspection sample”, and the other is a reference. The “inspection sample” is the “device to be tested”, and the “reference” is “the device characteristics and functions are guaranteed and the characteristics and functions are the host devices (hosts) that make up the inspection system. A device that provides the standard of inspection, as grasped by a computer etc.).

  As shown in FIG. 1, the test apparatus on the power receiving apparatus side includes, for example, a host computer (power receiving side) 400 and a measuring instrument 410. The power receiving device (secondary module) 300 is placed on a jig (not shown) provided in the measuring instrument 410, for example. The power receiving device 300 includes a host interface (host I / F) 312, a power reception control device 308, and a secondary coil L <b> 2 (not shown in FIG. 1B). The host computer (power receiving side) 400 can transmit and receive control information and measurement data to and from the measuring instrument 410. Further, the host computer (power receiving side) 400 can transmit and receive information to and from the power receiving apparatus 300 via the host interface 312.

  As a test (opposite test) performed with the power transmission device (primary side module) 200 and the power reception device (secondary side module) 300 facing each other, a confirmation test (primary side, 2) of authentication processing (negotiation & setup processing) (Both secondary side), ROM data read confirmation test for authentication process (negotiation & setup process) (both primary and secondary side), position tolerance range confirmation test during authentication process (negotiation & setup process), Examples include a foreign object detection function confirmation test during authentication processing (for example, a negotiation phase), a foreign object detection function confirmation test in a period after normal power transmission, and an operation confirmation test on the secondary side in a period after normal power transmission. The contents of each test will be described later.

(Normal operation example of non-contact power transmission system)
Before explaining the facing test of the power transmitting device or the power receiving device, a normal operation example of the contactless power transmission system will be described. FIG. 2 is a diagram illustrating a normal operation example of the non-contact power transmission system.

  The non-contact power transmission system shown in FIG. 2 is a system that supports a multi-power transmission system in which a single power transmission device 200 can transmit power to a plurality of power reception devices 300 of different types (power ratings and the like).

  In the standby state, the power transmission control device (not shown in FIG. 2) built in the power transmission side device (cradle) 500 sets the landing (setting) of the power reception side device (for example, mobile phone) 510 to 0.3 seconds, for example. Once detected (step S1), the landing of the power receiving device is detected (step S2). Note that the power transmission device 200 during standby drives the primary coil L1 intermittently in order to detect the landing of the power reception device 300. The primary coil L1 is driven by 5 milliseconds every 0.3 seconds, for example.

  Next, various kinds of information exchange (negotiation and setup: authentication processing) is performed between the power transmission device 200 and the power reception device 300 (step S3).

  In the negotiation phase (first authentication process), authentication information (including ID information) is exchanged. For example, a standard / coil / system conformity confirmation process is executed based on the received ID information and the like. In the negotiation phase, safety information (for example, detection parameters for detecting foreign matter and the like are also exchanged).

  Specifically, the power transmission side and the power reception side exchange authentication information such as ID information, and based on the received authentication information (ID information etc.), whether or not the standards / coils / systems etc. are compatible with each other. Check. Also, for example, the power receiving side transmits threshold information and the like (safety information) for detecting foreign objects to the power transmitting side, and performs safety information exchange. In this negotiation process, whether or not information communication is possible between the power transmission side and the power reception side, whether or not the communicated information is valid, and whether or not the load state on the power reception side is appropriate (foreign matter non-detection) Confirmation is also performed. In the negotiation process, if it is determined that the standards / coils / systems, etc. are inconsistent, a foreign object is detected, or a time-out error occurs as a result of the exchange of authentication information (ID information, etc.), the power transmission device 200 Shifts to the standby phase, for example (step S8).

  The power transmission side and the power reception side move to the setup phase (second authentication process) after the negotiation phase. In this setup phase, a setup process is executed in which setup information such as information on the corresponding function and setting information for each application is transferred. For example, the transmission condition is specified based on the result of the negotiation process. Specifically, when the power receiving side transmits transmission condition information such as the coil driving voltage and driving frequency to the power transmission side, the power transmission side performs normal power transmission such as the coil driving voltage and driving frequency based on the received transmission condition information. Set the transmission conditions for. In addition, this setup process also exchanges information about supported functions and exchanges of setting information that differs for each higher-level application. Specifically, threshold information for load state detection on the power receiving side after the start of normal power transmission (for example, threshold information for data communication / foreign object detection), or in the command phase after normal power transmission, Information exchange regarding the types of commands that can be issued / executed by the power receiving side and additional corresponding functions such as a communication function and a periodic authentication function is executed in this setup process. This makes it possible to exchange different setting information according to the application such as the type of electronic device (mobile phone, audio device, etc.) and model.

  In the setup process, when removal of the device is detected or a time-out error occurs, for example, the process proceeds to a standby phase (step S8).

  Thus, the negotiation process and the setup process (these processes are processes for confirming (ie, authenticating) the adaptability of the other party based on the exchanged information. After the confirmation that the power receiving device is an appropriate power transmission target and the necessary information is set, normal power transmission (here, for power supply to a load such as a battery) Are started (step S4). When normal power transmission is started, an LED provided in the power receiving device (cellular phone) 510 is turned on.

  Next, when full charge of a battery or the like is detected during normal power transmission, a full charge notification is transmitted from the power receiving apparatus to the power transmission apparatus, and the power transmission apparatus 200 that receives the notification stops normal power transmission (step S4). . When normal power transmission is stopped, the LED provided in the power receiving device (cellular phone) 510 is turned off. And it transfers to the standby phase after full charge detection (step S5).

  In a standby state after full charge detection, for example, removal detection is executed once every 5 seconds, and confirmation of the necessity of recharging is executed once every 10 minutes. When the power receiving device (cellular phone) 510 is removed after full charge, the process returns to the initial standby phase (step S6). If it is determined that recharging is necessary after full charging, the process returns to step S3 (step S7). Further, as described above, when the power receiving side device (mobile phone) 510 is removed or a foreign object is detected in the state of step 3, the apparatus returns to the initial standby state (step S8).

  FIG. 3 is a diagram illustrating an outline of the operation (internal state) of the power transmission device illustrated in FIG. 2. In FIG. 3, operations particularly related to the test method for the power transmitting apparatus or the power receiving apparatus of the present embodiment are shown surrounded by a thick solid line.

  The power transmission device 200 enters the reset state Q1 when the power is turned on, and shifts to the standby phase Q2 after a predetermined period. The power transmission device 200 starts temporary power transmission (continuous power transmission for enabling authentication processing and the like before normal power transmission) upon detecting the landing of the power receiving side device, and proceeds to the negotiation phase (first authentication processing) Q3. As described above, ID information exchange or the like is executed. If the negotiation process is successful, the power transmitting apparatus 200 proceeds to the setup phase (second authentication process) Q4. As described above, in the setup phase, information exchange of corresponding functions is performed.

  If the authentication process (negotiation phase Q3 and setup phase Q4) is passed, the power transmitting apparatus 200 proceeds to the command phase Q8. In the command phase Q8, processing for issuing corresponding commands based on the information obtained in the setup phase Q4 is performed.

  Further, in the negotiation phase Q3, when a mismatch between standards / coils / systems, etc. is detected, when a foreign object is detected, when removal is detected, or when a timeout error occurs (state Q5), the power transmission device 200 returns to the reset state Q1. Further, when a communication error occurs in the negotiation phase Q3 (state Q7), the power transmitting apparatus 200 returns to the standby phase Q2.

  In addition, in the setup phase Q4, when a removal or timeout error is detected (state Q6), the power transmitting apparatus 200 returns to the reset state Q1. In the command phase Q8, when foreign object detection or removal is detected (state Q10), the power transmission device 200 returns to the reset state Q1. Further, in the command phase Q8, when a full charge of the battery (load to be fed) is detected (state Q11), the power transmitting apparatus 200 returns to the standby phase state Q2.

(Overview of the opposing test)
FIG. 4 is a diagram showing an outline of the procedure of a test method (opposite test method) for a power transmission device or a power reception device according to the present invention. First, the inspection sample (one of the primary side and the secondary side) and the reference (any other) are arranged to face each other (step S100).

  Next, mutual communication (bidirectional communication) is executed between the power transmission device 200 and the power reception device 300 (step S200). This communication includes communication for authentication processing (negotiation processing and setup processing), communication of information for detecting foreign matter (foreign matter detection threshold, etc.), and communication for foreign matter detection (for example, periodic authentication). Communication: that is, after normal power transmission, the power receiving apparatus 300 performs periodic load modulation to communicate a pattern consisting of a combination of “0” and “1”).

  Subsequently, the host device (host computer or the like) reads out the information stored (accumulated) in the test register (first storage unit) provided in the test sample via the interface unit, and the power transmission device (1 A function test of the secondary module) or the power receiving apparatus (secondary module) is executed (step S300). Hereinafter, specific examples of the facing test will be individually described with reference to the drawings.

(Negotiation confirmation test)
FIG. 5 is a diagram for explaining the contents of the negotiation confirmation test. In the negotiation process (first authentication process), as described above, the ID code exchange for confirming the conformity of the standard / coil / system between the power transmitting apparatus 200 and the power receiving apparatus 300 and the safety such as the foreign object detection threshold The above information exchange is performed. Hereinafter, ID codes and safety information are collectively referred to as nego data.

  As shown in FIG. 5, for example, first negotiation processing data (nego data (1)) is stored as an initial value in a ROM (corresponding to a second storage unit) 205 in the power transmission device 200. . Similarly, the ROM 311 in the power receiving apparatus 300 stores, for example, second negotiation processing data (negotiation data (2)) as an initial value.

  In the negotiation process (first authentication process), each of the negotiation data (1) and the negotiation data (2) is exchanged between the power transmission device 200 and the power reception device 300. As a result, the negotiation data (1) is accumulated in the register unit (corresponding to the first storage unit) 314 in the power receiving apparatus 300, and the negotiation data (2) is accumulated in the register unit 207 in the power transmission apparatus 200.

  After the negotiation process (first authentication process) is completed, the host (power transmission side) 100 knows this from, for example, an interrupt signal from the power transmission control device 230 (see FIG. 1) in the power transmission device 200, and the host I / The nego data (2) sent from the power receiving apparatus side is read from the register unit 207 via F204, for example, the read data is collated with an expected value. As a result, it is confirmed whether or not the negotiation data (2) is stored at the correct address of the register unit 207, and whether or not the negotiation data (2) is correct data.

  Similarly, after the negotiation process (first authentication process) is completed, the host (power receiving side) 400 performs, for example, an interrupt signal from the power receiving control device 308 (see FIG. 1) in the power receiving device 300. Knowing, the nego data (1) sent from the power transmission apparatus side via the host I / F 204 is read from the register unit (first storage unit) 314, and for example, the read data is collated with an expected value. As a result, it is confirmed whether or not the negotiation data (1) is stored at the correct address of the register unit 314, and whether or not the negotiation data (1) is correct data.

(Setup confirmation test)
FIG. 6 is a diagram for explaining the contents of the setup confirmation test. In the setup process (second authentication process), as described above, information on the corresponding function and setting information for each application (various parameters, codes, and the like) are exchanged between the power transmitting apparatus 200 and the power receiving apparatus 300. Hereinafter, the function information and the setting information for each application are collectively referred to as setup data.

  As illustrated in FIG. 6, for example, first setup processing data (setup data (1)) is stored as an initial value in the ROM 205 in the power transmission device 200. Similarly, the ROM 311 in the power receiving apparatus 300 stores, for example, second setup processing data (setup data (2)) as an initial value.

  In the setup process (second authentication process), the setup data (1) and the setup data (2) are exchanged between the power transmitting apparatus 200 and the power receiving apparatus 300. As a result, the setup data (1) is stored in the register unit 314 in the power receiving apparatus 300, and the setup data (2) is stored in the register unit 207 in the power transmitting apparatus 200.

  After the setup process (second authentication process) is completed, the host (power transmission side) 100 knows it by, for example, an interrupt signal from the power transmission control device 230 in the power transmission device 200, and via the host I / F 312, The setup data (2) sent from the power receiving apparatus side is read from the register unit 207, for example, the read data is collated with an expected value. Thereby, it is confirmed whether or not the setup data (2) has been stored at the correct address of the register unit 207, and whether or not the setup data (2) is correct data is confirmed.

  Similarly, after the setup process (second authentication process) is completed, the host (power receiving side) 400 knows this from, for example, an interrupt signal from the power receiving control device 308 in the power receiving device 300, and the host I / O The setup data (1) sent from the power transmission device side is read from the register unit 314 via F312 and, for example, the read data is collated with an expected value. As a result, it is confirmed whether or not the setup data (1) is stored at the correct address of the register unit 314, and whether or not the setup data (1) is correct data.

(Nego & setup pass confirmation test)
FIG. 7 is a diagram for explaining the contents of the nego & setup pass confirmation test. In the nego & setup pass confirmation test, for example, it is confirmed to which stage the authentication process has passed. That is, after the setup process (second authentication process) is completed, the host (power transmission side) 100 transmits an interrupt command to the power transmission control device 230 in the power transmission device 200, for example, and performs status information (for example, negotiation and setup). The flag information indicating that the data has passed is read from the register unit 207, and a pass confirmation test is executed in the negotiation & setup process (authentication process).

  Thereby, it is confirmed whether both the negotiation process and the setup process have failed, the negotiation process has succeeded, and the setup process has failed, or both the negotiation process and the setup process have succeeded. Further, for example, it is possible to confirm whether or not a communication error (see state Q7 in FIG. 3) has occurred during the negotiation.

(Negotiation and setup ROM data read confirmation test)
FIG. 8 is a diagram for explaining the contents of a read confirmation test of ROM data for negotiation and setup.

  In the read confirmation test of the ROM data for negotiation and setup, the host (power transmission side) 100 receives the negotiation data (1) and setup data (1) (that is, data transmitted to the power reception device) from the ROM 205 in the power transmission device 200. To check whether these data are stored at a correct address and whether these data are correct data.

  Similarly, the host (power receiving side) 400 reads the negotiation data (2) and setup data (2) (that is, data transmitted to the power receiving device) from the ROM 311 in the power receiving device 300, and these data are correct. It is confirmed whether it is stored in the address and whether these data are correct data.

(Position tolerance check test during negotiation and setup)
FIG. 9 is a diagram for explaining an example of the contents of the position tolerance verification test during the negotiation and setup process. In this test, the primary coil L1 and the secondary coil L2 are intentionally shifted by a predetermined distance d1 to be opposed to each other. When the negotiation & setup process is started, the power transmission device 200 starts temporary power transmission (continuous power transmission before normal power transmission) to the power receiving device 300. The power receiving apparatus 300 includes a power receiving unit 302 and a detection unit 310, and the detection unit 310 measures a received power level. Since the received power level changes according to the shift amount d1 between the primary coil L1 and the secondary coil L2, the measurement data of the received power level is between the primary coil L1 and the secondary coil L2. It can be used as position level data corresponding to the shift amount d1. The position level data is transmitted from the power receiving device 300 to the power transmitting device 200 and stored in the register unit 207 in the power transmitting device 200.

  The host (power transmission side) 100 reads the position level data from the register unit 207 in the power transmission apparatus 200, and checks whether the position level data is within the allowable range. For example, when the position level is less than the allowable level even though the deviation d1 between the primary coil L1 and the secondary coil L2 is set within the allowable range, it is determined that there is some abnormality. Is done.

(Foreign matter detection function confirmation test during negotiation and setup)
FIG. 10 is a diagram for explaining the contents of the foreign object detection function confirmation test at the time of negotiation and setup (authentication processing period). In this test, it is inspected whether or not the foreign object detection function provided in the power transmitting device 200 and the power receiving device 300 operates properly during negotiation and setup. For example, as shown in FIG. 10, a conductive foreign material ME (for example, a thin plate metal) is inserted between the primary coil L1 and the secondary coil L2. At this time, for example, the conductive foreign object ME is disposed at a position where the primary coil L1 and the secondary coil L2 are not completely cut off, and the minimum electric power is transmitted from the primary coil L1 to the secondary coil L2. Make sure that

  In the state where the primary coil L1 and the secondary coil L2 are completely coupled and the state where the primary coil L1 and the secondary coil L2 are coupled via the conductive foreign matter ME, the resonance characteristics of the resonance circuit including the primary coil L1 as a constituent element are Because of the difference, the voltage level (peak voltage level) of the coil end signal of the primary coil L1 changes, and the phase characteristics (voltage and voltage) of the coil end signal when the drive clock of the primary coil L1 is used as a timing reference. The phase relationship of the current changes.

  The detection determination unit 244 provided in the power transmission device 200 detects the change in the peak voltage and the change in the phase. That is, the detection determination unit 244 detects the change in the peak voltage or the change in the phase based on the coil end signal output from the AFE (analog front end for detecting the coil end voltage from the primary coil L1) 242. To do. Thereby, the presence of a foreign object is detected. When the presence of a foreign object is detected, for example, a status flag indicating foreign object detection becomes active, and the status flag is stored in the register unit 207.

  The host (power transmission side) 100 reads the status flag from the register unit 207 and confirms whether or not the presence of the metal foreign object ME has been detected. This makes it possible to accurately confirm the effectiveness of the foreign object detection function at the time of negotiation and setup (for example, whether foreign objects can be detected under the limit conditions in which foreign objects can be detected).

  The foreign object detection method described above is an example, and other foreign object detection methods may be employed. For example, it is possible to detect foreign matter on the secondary side. That is, for example, the transmission power level before normal power transmission is lowered to a level near the limit at which the minimum power required for the authentication process or the like can be secured. If a foreign object exists between the primary coil L1 and the secondary coil L2, at least a part of the power (weak power) transmitted from the power transmission device is consumed by the metal foreign material and does not reach the power receiving device 300. The power reception level in the power reception device 300 decreases (extremely) beyond the allowable range. Therefore, the power receiving apparatus 300 can detect foreign object detection when an extreme power decrease (such as a decrease in coil end voltage) occurs during the authentication processing period. When the power receiving apparatus 300 detects a foreign object, the power receiving apparatus 300 thereafter stops transmission by load modulation (for example, transmission of parameters and data for authentication processing) to the power transmitting apparatus 200 that should be performed originally. The power transmitting apparatus 200 monitors the load state on the power receiving apparatus 300 side based on the coil end signal of the primary coil L1 (that is, if a signal is sent from the power receiving apparatus 300 side by load modulation, the power receiving apparatus 300 receives the signal immediately. Therefore, it is possible to recognize that a foreign object has been detected when the signal to be sent is not sent within the allowable time. In this case, a time-out error has occurred, and the power transmission device 200 shifts to a standby state.

(Foreign object detection function test during normal power transmission)
FIG. 11 is a diagram for explaining the contents of the foreign object detection function test during normal power transmission. In this test, the effectiveness of the foreign object detection function (takeover state detection function) during the normal power transmission period is confirmed. When a metal foreign object is inserted during the normal power transmission period, when the power transmission apparatus 200 recognizes the metal foreign object as a load on the power receiving apparatus side, the removal detection function does not work effectively, and normal power transmission is continued. There arises a problem that foreign matter generates heat. This state is referred to as a “takeover state”. It is extremely important to reliably detect the hijacking state in order to ensure the safety of the contactless power transmission system.

  Therefore, during the normal power transmission period, the power reception control device 308 of the power reception device 300 controls the load modulation unit 304 to intermittently generate a predetermined pattern of “1” and “0” (foreign object detection signal). It is transmitted to the power transmission device 200 (preferably periodically (periodically)). The power transmission device 200 receives and detects a signal of a predetermined pattern transmitted by this load modulation. This detection is preferably performed by the detection determination unit 244 using the foreign object detection threshold acquired by the negotiation & setup process (authentication process).

  For example, when the predetermined pattern detection fails repeatedly for a predetermined number of times, the power transmission control device 230 in the power transmission device 200 determines that a foreign object has been inserted and stops normal power transmission. Then, status information indicating that a foreign object has been detected is set in the register unit 207.

  The host (power transmission side) 100 reads the status information from the register unit 207 and confirms whether or not the presence of the metal foreign object ME inserted during the normal power transmission period has been detected. Thereby, the effectiveness of the foreign object detection function (takeover state detection function) in the normal power transmission period can be confirmed.

(Second Embodiment)
In the present embodiment, examples of specific internal configurations of the power transmission device and the power reception device will be described.

(Internal configuration example of power transmission device and power reception device)
FIG. 12 is a diagram illustrating an internal configuration example of the power transmission device and the power reception device. The power transmission device 200 is, for example, a primary module (a component of a contactless power transmission system) configured by mounting a plurality of circuit elements on a circuit board. The power transmission device 200 includes a primary coil L1, a system clock generation circuit (8 MHz oscillation circuit) 202 that generates a system clock SCK, a host interface 204, a test mode setting circuit 206, negotiation processing data (negotiation data), and setup. ROM (first storage unit, RAM can also be used) 205 that stores processing data (setup data), register unit 207, temperature determination unit (temperature abnormality detection unit) 218, power transmission control device 230, an AFE (analog front end) 242 for monitoring the signal waveform at the coil end of the primary coil L1, and a detection determination unit 244 that performs load fluctuation on the secondary side, removal of the secondary side, or foreign object detection. And a power transmission unit 250 and a system bus BUS1. The circuit board is provided with a plurality of signal terminals (P1 to P10). Further, at a predetermined location on the circuit board, at least one thermistor (temperature measuring device) 220 for monitoring the temperature is disposed. The temperature information output from the thermistor 220 is supplied to the temperature determination unit 218 via the signal terminal P7.

  The power transmission unit 250 includes a drive control circuit 252 that controls driving of the primary coil L1 and a coil drive circuit (driver) 254. The drive control circuit 252 divides the system clock SCK to generate a drive clock (driver clock) DRCK and supplies it to the coil drive circuit (driver) 254. In the present embodiment, by setting information in the test register 216, the supply of the drive clock DRCK to the coil drive circuit (driver) 254 can be forcibly stopped during the test.

  The power transmission control device 230 includes a power transmission sequence control unit 232, a frequency modulation circuit 234, a main sequencer 236 that controls the overall operation of the power transmission device 200, a reception control / load demodulation circuit 238, and a periodic authentication determination circuit 240. Have. As described above, “periodic authentication” means, for example, that the secondary side periodically performs detection in order to detect that a foreign object has been inserted between the primary coil L1 and the secondary coil L2 during normal power transmission. The load modulation is executed, a signal of a predetermined pattern is transmitted to the primary side, and the primary side periodically checks whether or not the predetermined pattern can be detected.

  The register unit 207 stores a parameter 1 register 209 that stores parameter 1 that is an operation parameter on the primary side, and a parameter register that stores parameter 2 that is an operation parameter on the secondary side sent from the secondary side through information exchange. 210, a status register 211 for storing status relating to communication, charging, etc., a command register 212 for storing communication commands, etc., a data register 213 for storing communication data, etc., and an interrupt for storing interrupt requests relating to communication, charging, etc. A register 214; and a test register 216 as a test memory (test information setting unit) in which information for testing (bit information for determining a test mode and a test condition) is set.

  The test register 216 functions as a test information setting unit. The test register 216 as a test information setting unit has a first forced power transmission mode (force mode) setting unit, and switching information for enabling the first forced power transmission mode is set in the first forced power transmission mode setting unit. By setting, the power transmission device 200 can be in a forced continuous power transmission state. When the first forced power transmission mode is disabled, the power transmission device 200 maintains a standby state, and in the standby state, the power transmission device 200 detects intermittent power transmission (for example, 0. Power transmission once every 3 seconds).

  The test information setting unit can be configured by a writable memory. For example, the memory space of the memory is divided into a plurality of memory areas, and each divided memory area functions as a setting unit for determining (selecting) an operation mode, an operation condition, and the like for a test. Specifically, for example, the first forced power transmission mode (force mode) is enabled / disabled depending on whether switching information “1” or “0” is set in a predetermined bit of a predetermined address of the memory. Can be determined.

  More specifically, by setting information bits to predetermined bits at predetermined addresses in the test register 216, setting of test information (information specifying a test mode, test conditions, etc.) is realized. By configuring the test information setting unit with the test register 216, setting of test conditions is facilitated.

Note that the test register 216 is a storage device having a relatively simple configuration that can write information for testing and can hold the written information, for example. Also, it is desirable that write access to the test register 216 is permitted only when the test mode is selected by the test mode setting circuit 206 in order to prevent erroneous condition setting and the like. The test mode setting circuit 206 is supplied with a test mode signal (TEST) and a test mode clock (TMCK) via signal terminals P5 and P6.
The adoption of the test register 216 contributes to simplification and miniaturization of the configuration of the power transmission device 200, and also contributes to cost reduction.

  As described above, the power transmission device 200 has the host interface 204 for communicating with the power transmission side host 100, and the power transmission side host 100 is connected to the test register 216 as a test information setting unit via the host interface 204. Can be accessed. By providing the host interface 204, a power transmission side host (for example, a host computer of a test apparatus or a host apparatus using a non-contact power transmission system) 100 accesses the test register 216 to test modes and test conditions. Can be specified. As a result, the power transmission side host 100 can lead the test of the power transmission device 200.

  The power transmission side host 100 and the host interface 204 include an I2C interface capable of bidirectional communication by two-wire serial communication. In the I2C interface, an interrupt signal (XINT) supply line, a serial clock (SCL) supply line, and a serial data (SDA) supply line are used. Each line is pulled up to the power supply voltage VD1 via a pull-up resistor.

  In this embodiment, the power transmission side host 100 is configured to access the test register 216. However, the present invention is not limited to this, and other external devices (higher level devices) other than the power transmission side host are connected to the test register. 216 may be accessible. The “external device (host device)” is, for example, a test device (tester) for a non-contact power transmission system, or a test condition generator dedicated to testing a power transmission device. In order to allow an external device to access the test register 216, an interface unit can be provided in the power transmission device 200. Further, for example, it is also possible to provide a test dedicated terminal (test pin) in the power transmission apparatus 200 so that the operation mode setting information and the like can be directly written to the test register 216 via the dedicated terminal. It is. As a result, for example, the test apparatus or the like can determine the conditions independently and can perform the operation test of the power transmission apparatus.

  12 is provided with a reset signal input terminal P4 for inputting a reset signal (pin reset signal) PNRS for resetting the power transmission control device 230. When the reset signal (pin reset signal) PNRS becomes active, the circuit located on the right side of the alternate long and short dash line in FIG. 12 is reset.

  Information for testing is written in the test register 216 as a test information setting unit in a period before reset of the power transmission control device 230 by reset signal (pin reset signal) PNRS after power-on reset of the power transmission device 200, and After the completion of the writing of the information for the test, the reset of the power transmission control device 230 by the reset signal (pin reset signal) PNRS is released.

  That is, the write access to the test register 216 is permitted only when, for example, the test mode is selected, and the write access is, for example, after the power-on reset is released and the reset of the power transmission control device is released. This can be done in the period before The power-on reset is an operation in which the flip-flop is initialized by the power-on reset circuit because the operation of the flip-flop is not stable immediately after the power is turned on.

  The operation of the test register 216 is stabilized by the power-on reset. In addition, at the same time that information is written to the test register 216, in order to prevent the power transmitting apparatus 200 from starting operation according to the written information, the information for testing is written to the test register 216 by the power transmission control apparatus. 230 is performed in a reset state. Then, after all information settings are completed, the reset of the power transmission control device 230 is cancelled. When the reset is released, the power transmission control device controls the power transmission device 200 according to the information set in the test register 216 after a predetermined period of time, thereby executing power transmission for a test under a desired condition.

  Since the power transmission device 200 includes the reset signal input terminal P4 for resetting the power transmission control device 230, the power transmission control device 230 can be reset at a desired timing. Therefore, it is possible to set necessary information in the test register 216 as a test information setting unit at a desired timing.

  12 includes a secondary coil L2, a power reception unit 302, a load modulation unit 304, and a power supply control unit 306 that controls power supply to the battery (load) 316. A power reception control device 308, a system bus BUS 2, a position / frequency detection circuit 310, a host interface 312, a ROM 311, and a register unit 314. The power receiving side host 400 can perform bidirectional communication with the power receiving apparatus 300 via the host interface 312. The ROM 311 corresponds to the ROM 205 in the power transmission device 200, and the register unit 314 corresponds to the register unit 207 in the power transmission device 200.

  Note that the power transmission device 200 shown in FIG. 12 can be configured with one IC (integrated circuit device), for example, except for the coil drive circuit 254 included in the power transmission unit 250. In addition, the power receiving device 300 illustrated in FIG. 12 can be configured by a single IC (integrated circuit device) except for the power receiving unit 302, the load modulation unit 304, and the power supply control unit 306, for example. However, this configuration is an example, and the present invention is not limited to this configuration.

(Test register configuration example)
FIG. 13 is a diagram illustrating a configuration example of the test register. The memory area of the test register 216 is divided into addresses A to D. The memory area of each address is composed of 8 bits. The name of address A is default setting 1, the name of address B is default setting 2, the name of address C is test command setting 1, and the name of address D is test command setting 2.

  In FIG. 13, bit 7 of address A is set to enable / disable switching information (“1” or “0”) in the first forced power transmission mode (force mode). Therefore, bit 7 of address A functions as a first forced power transmission mode (force mode) setting unit. When the force mode bit is “1”, the first forced power transmission mode is enabled.

  Bits 3 to 6 of the address A are setting units that set the frequency value of the driving frequency F1 of the primary coil L1. Bits 4 to 6 of the address B are setting units for setting the frequency value of the driving frequency F2 of the primary coil L1. Bits 0 to 2 of the address B are setting units for setting the frequency value of the driving frequency F3 of the primary coil L1.

  The drive frequencies F1 and F2 are frequencies used for frequency modulation communication during normal power transmission. The frequency value of the frequency F3 is set to a frequency value closer to the resonance frequency of the primary coil L1 than the frequencies F1 and F2 used for communication. The frequency F3 is, for example, a foreign object detection frequency (for example, a frequency at which a phase change of a signal obtained from the primary coil can be manifested when a foreign object is inserted). The temperature rise is caused by continuous oscillation, and can be used for a test for evaluating the temperature detection characteristic of the temperature detection unit provided in the power transmission device. During the temperature function test, by continuously driving the primary coil at the frequency F3 close to the resonance frequency, the drive amplitude can be increased and the ambient temperature can be increased efficiently.

  Bit 5 of address C is a setting unit for nego-on information, which is one piece of setting information for the second forced power transmission mode. Bit 6 of address C Bit 6 of the address C is a setup information setting unit which is one of the setting information of the second forced power transmission mode. When the force mode bit is “0”, the nego on bit is “0”, and the setup on bit is “0”, the second forced power transmission mode is enabled.

  Bit 4 of address C is a coil enable setting unit for setting driver on information (coil drive enable information) for forcibly setting whether or not primary coil L1 is driven (on / off). .

  Bits 1 to 7 of the address D are information setting units for designating the drive pattern of the primary coil L1. For example, continuous driving at the driving frequency F1, continuous driving at the driving frequency F2, continuous driving at the driving frequency F3, driving by frequency switching (FSK) between F1F2 based on the internally generated random code, based on a random code input from the outside Driving by frequency switching between F1F2 (FSK), driving by frequency switching (FSK) between F1F3 based on internally generated random code, driving by frequency switching (FSK) between F1F3 based on random code input from the outside, etc. It is possible to select (specify).

  FIG. 14 is a diagram for explaining setting of the test mode. As described above, when the force mode bit is “1”, the first forced power transmission mode is enabled. In addition, when the force mode bit is “0”, the nego on bit is “0”, and the setup on bit is “0”, the second forced power transmission mode is enabled.

  Further, when the force mode bit is “0”, the nego on bit is “1”, and the setup on bit is “1”, the mode is switched to the normal power transmission mode. In the present embodiment, confirmation of whether the authentication process (negotiation process and setup process) is properly executed, confirmation of the foreign object detection function during the authentication process, confirmation of the foreign object detection function during normal power transmission, or normal power transmission This normal operation mode is selected in the test mode in order to confirm the suitability of the operation of the subsequent power receiving apparatus.

  In the test mode, the main sequencer 236 reads the bit information set in the test register 216 and executes a test operation corresponding to the set bit information.

  Hereinafter, the operations of the power transmission device 200 and the power reception device 300 will be specifically described with reference to FIGS. 15 and 16. 15 and 16 are flowcharts for explaining specific operations of the power transmission device and the power reception device. In FIGS. 15 and 16, the processing flow on the primary side is shown on the left side, and the processing flow on the secondary side is shown on the right side.

  First, the processing flow of FIG. 15 will be described. The power transmission control device 230 controls the power transmission device 200 after waiting for k1 seconds (step S30) to start provisional power transmission at the frequency F1 (step S31), and then continues with the force mode bit (first forced power transmission mode). It is determined whether or not (bit) is “1” (step S32). If the force mode bit (first forced power transmission mode bit) is “1”, the power transmission control device 230 controls the power transmission device 200 to forcibly use the frequency F1 selected by bits 3 to 1 of the address D. Continuous power transmission is executed (processing in the first forced power transmission mode).

  After the secondary device landing detection (step S34), the power transmitting apparatus 200 receives the nego frame (step S35). The power transmission control device 230 determines whether or not the nego-on bit that is the second forced power transmission mode bit is “1” (step S36). When the nego-on bit is “1”, the ID information (nego information) acquired by the negotiation process is checked for coincidence (step S37). When the nego-on bit is “0”, the ID information acquired by the negotiation process ( Negotiation information) is omitted.

  Subsequently, the power transmission control device 230 confirms the position information of the primary device and the secondary device (step S38), and then confirms the presence or absence of a foreign object (step S39). When no foreign object is detected, the power transmission control device 230 controls the power transmission device 200 to transmit a nego frame (including standard / coil / system information) toward the secondary side (step S40).

  The ID information included in the nego frame transmitted in step S40 is authentication information for forcing the power receiving apparatus 300 into the power receiving mode.

  Further, as illustrated on the right side of FIG. 15, each process of Step S <b> 60 to Step S <b> 65 is performed in the power receiving device 300. After a wait of k2 seconds (step S60), the power receiving apparatus 300 is turned on by receiving power (step S61). The power reception control device 308 turns off the load modulation transistor (step S62), performs position confirmation (step S63), controls the power reception device 300, and transmits the nego frame toward the power transmission device 200 ( Step S64). Thereafter, the power receiving apparatus 300 receives the nego frame transmitted from the power transmitting apparatus 200 (step S65).

  Next, the processing flow of FIG. 16 will be described. The power transmission device 200 receives the setup frame (step S41). The power transmission control device 230 determines whether or not the setup on bit is “1” (step S42). When the setup on bit is “1”, the power transmission control device 230 confirms whether or not the setup is properly completed. Performed (step S43), but when the setup on bit is “0”, the confirmation process of step S43 is omitted.

  Subsequently, the power transmission control device 230 controls the power transmission device 200 to transmit the setup frame toward the secondary side (step S44). Subsequently, the power transmission control device 230 performs position confirmation (step S45). Next, the power transmitting apparatus 200 receives the start frame transmitted from the secondary side (step S46).

  Next, the power transmission control device 230 detects whether or not the nego on bit is “1” and the set on bit is “1” (that is, whether the second forced power transmission mode is disabled or enabled) ( Step S47). When the nego on bit is “1” and the set on bit is “1” (that is, when the second forced power transmission mode is disabled), the power transmission control device 230 controls the power transmission device 200 to perform normal power transmission ( The condition is switched to the condition for charging (step S48), periodic authentication is turned on (step S49), and normal power transmission (that is, continuous power transmission based on parameter 2 received from the secondary side: for example, frequency F1) is started ( Step S50).

  On the other hand, in step S47, when the nego on bit is “0” and the set on bit is “0” (that is, when the second forced power transmission mode is enabled), the power transmission control device 230 controls the power transmission device 200. Continuous power transmission (frequency F1) under the primary side setting condition is continued without setting a time limit (step S51). Subsequently, the power transmission control device 230 controls the power transmission device 200 to turn on periodic authentication (step S52). In the normal power transmission period, the power transmission device 200 periodically performs foreign object detection based on periodic authentication (step S53). In addition, when a full charge detection command is received from the power receiving device 300 (step S54), the power transmission device 200 turns off the periodic authentication and stops power transmission (step S55).

  In FIG. 16, the power receiving apparatus 300 confirms the negotiation frame (step S66), the position confirmation (step S67), the setup frame transmission (step S68), the setup frame reception (step S69), and the setup OK confirmation (step S69). Step S70), start frame transmission (step S71) and the like are executed. In addition, after normal power transmission is started, the power receiving apparatus 300 turns on the periodic authentication (step S72), and when full charge is detected (step S73), transmits a full charge detection command to the power transmission apparatus 200 (step S72). S74).

  Through the operations described above, the other party's parameters and data obtained by information exchange are accumulated in the register unit 207 provided in the power transmitting device 200 and the register unit 314 provided in the power receiving device 300, and the history information of each operation (For example, status information indicating the pass status of the authentication process) is accumulated.

  The host computers 100, 400, etc., which are host devices (external devices), for example, after the operation to be tested ends, for example, via the interface units 204, 312, etc., the power transmission control device 230 and the power reception control device. An interrupt request is transmitted to 308, and parameters, codes, data, status information and operation history information such as various flags necessary for the test are read from the register units 207 and 314. Then, it is confirmed whether or not a desired operation is actually executed. For example, as described above, whether or not the authentication process (negotiation process as the first authentication process and setup process as the second authentication process) is being executed correctly, confirmation of the foreign object detection function during the authentication process, normal power transmission Confirmation of the foreign object detection function at the time, confirmation of appropriateness of operation of the power receiving apparatus after normal power transmission, and the like are executed.

  As described above, according to at least one embodiment of the present invention, even when a complicated authentication process is executed, a test of the authentication processing function of the power transmission apparatus or the power reception apparatus can be performed reliably and with high accuracy. Can be executed. For example, even when a plurality of processes are included in the authentication process, it is possible to accurately detect which stage of the process has been passed.

  Further, in the multi-power transmission system, for example, it is possible to check not only whether or not the group numbers of the authentication IDs match but also whether or not the specific coil ID codes match. Therefore, a product in which individual specific ID authentication codes (such as the above-mentioned coil ID) do not match by a test before shipping the product can be reliably selected as a defective product. Therefore, it is possible to strictly ensure the reliability and safety of the product.

  That is, according to at least one embodiment of the present invention, it is possible to clearly test the correct status of the authentication process whether the authentication process has been passed or the accuracy of the authentication information itself exchanged by the authentication process. can do.

  In contactless power transmission systems, safety is extremely important, and measures against foreign objects are particularly important, so inspections of functions related to foreign object detection in power transmission devices and power receiving devices must be carefully performed before shipping the product. There is a need to do.

  According to at least one embodiment of the present invention, when a foreign object exists between the primary coil and the secondary coil in the temporary power transmission period (period during which the authentication process is performed), the presence of the foreign object can be reliably detected. Whether or not can be confirmed at the inspection stage.

  In addition, after normal power transmission is started, it can be confirmed at the inspection stage whether or not insertion of a foreign substance between the primary coil and the secondary coil can be reliably detected.

  Therefore, according to some embodiments of the present invention, for example, a confirmation test of an authentication process performed between a power transmission device and a power reception device can be performed reliably and with high accuracy. The function related to foreign object detection of the power receiving apparatus can also be reliably inspected, and therefore, a practical test technique can be established for, for example, a non-contact power transmission system that supports multi-power transmission.

  In addition, a highly reliable power transmission device (primary side module) and power reception device (secondary side module) having a circuit configuration that enables testing before shipment can be realized. In addition, a contactless power transmission system with high reliability and high practical value can be realized.

  In addition, although this embodiment was explained in full detail, it will be easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. Therefore, all such modifications are included in the present invention.

  INDUSTRIAL APPLICABILITY The present invention has an effect that the inspection of the authentication processing function, the foreign object detection function, etc. of the power transmission device or the power reception device, or the operation inspection of the power reception device after the normal power transmission can be reliably, highly accurately and efficiently performed. Therefore, it is useful as a power transmission device and a power reception device test method, a power transmission device, a power reception device, a non-contact power transmission system, and the like.

100 power transmission side host, 110 measuring instrument, 200 power transmission device (primary side module),
L1 primary coil, 202 system clock generation circuit (8 MHz oscillation circuit),
204 Host interface, 205 ROM, 206 Test mode setting circuit,
207 Register section (power transmission side), 216 Test register,
218 Temperature determination unit (temperature abnormality detection unit), 220 Thermistor (temperature detection unit),
230 power transmission control device (IC), 232 power transmission sequence control unit,
234 frequency modulation circuit, 236 main sequencer,
238 reception control / load demodulation circuit, 240 periodic authentication judgment circuit,
242 AFE (analog front end), 244 detection determination unit, 250 power transmission unit,
BUS1 system bus, 252 drive control circuit,
254 Coil driving circuit (driver), 300 power receiving device, 302 power receiving unit,
304 load modulation unit, 306 power supply control unit, 308 power reception control device,
310 detection unit (detection circuit), 311 ROM, 312 host interface,
314 Register unit (power receiving side), 400 Power receiving side host, 410 Measuring instrument

Claims (16)

A power transmission device that supplies power to a power reception device via an electromagnetically coupled primary coil and secondary coil, or a test method for the power reception device,
The test sample that is one of the power transmission device and the power reception device is opposed to the reference that is the other of the power transmission device and the power reception device,
Communication between the test sample and the reference;
A method of testing a power transmitting device or a power receiving device, wherein a host device reads information stored in a first storage unit in the test sample as a result of the communication via an interface unit in the test sample . A test method for a power transmitting device or a power receiving device according to claim 1,
In the communication, communication for exchanging authentication information in an authentication process executed before the power transmission device starts normal power transmission to the power receiving device,
Communication of foreign object detection threshold information for detecting foreign objects existing between the primary coil and the secondary coil, which is executed during the authentication process;
And at least one of the communications for detecting foreign matter existing between the primary coil and the secondary coil, which is executed after the normal power transmission, of the power transmission device or the power reception device Test method. A test method for a power transmitting device or a power receiving device according to claim 1,
The communication includes communication for exchanging authentication information in an authentication process executed before the power transmission device starts normal power transmission to the power receiving device,
The authentication information includes
A test method for a power transmitting apparatus or a power receiving apparatus, comprising ID information relating to at least one of a standard / coil / system between the power transmitting apparatus and the power receiving apparatus. A test method for a power transmitting device or a power receiving device according to claim 3,
The authentication information further includes:
Threshold information for foreign object detection;
Information about the corresponding function between the power transmission device and the power reception device;
Configuration information by application, and
For the authentication process,
A first authentication process for authenticating at least one standard / coil / system conformity between the power transmitting device and the power receiving device and exchanging threshold information for detecting the foreign matter;
A second authentication process for exchanging information about a corresponding function between the power transmission device and the power receiving device, and exchanging setting information for each application;
A method for testing a power transmitting device or a power receiving device, comprising: A test method for a power transmitting device or a power receiving device according to any one of claims 2 to 4,
A test method for a power transmission device or a power reception device, wherein the host device performs a pass confirmation test of the authentication process by reading the pass history information of the authentication process stored in the first storage unit. A test method for a power transmitting device or a power receiving device according to any one of claims 2 to 4,
The higher-level device reads the authentication information sent from the reference stored in the first storage unit from a predetermined address of the first storage unit, and collates it with an expected value, thereby authenticating the authentication. A test method for a power transmitting apparatus or a power receiving apparatus, comprising performing a processing confirmation test. A test method for a power transmitting device or a power receiving device according to any one of claims 2 to 4,
The test sample has a second storage unit that stores the authentication information for transmission to the reference,
The higher-level device reads the authentication information stored in the second storage unit for transmission to the reference from a predetermined address of the second storage unit, and collates it with an expected value. A test method for a power transmitting device or a power receiving device, characterized by performing a confirmation test. A test method for a power transmitting device or a power receiving device according to any one of claims 1 to 5,
A test method for a power transmitting device or a power receiving device, wherein the host device performs a communication error confirmation test by reading communication error history information stored in the first storage unit. A test method for a power transmitting device or a power receiving device according to any one of claims 1 to 5,
In the case where the reference is a power receiving device and the test sample is a power transmitting device, the power receiving device as the reference is based on a signal obtained from a coil end of the secondary coil, and the primary coil and the 2 A position level signal corresponding to the positional relationship of the next coil is acquired, and the acquired position level signal is transmitted to the power transmission device as the inspection sample, and the higher-level device accumulates in the first storage unit in the power transmission device By executing the position level signal being read, a test of the position detection function of the power transmission device as the inspection sample is performed,
When the reference is a power transmission device and the inspection sample is a power reception device, the power reception device as the inspection sample is based on a signal obtained from a coil end of the secondary coil, and the primary coil and the A position level signal corresponding to the positional relationship of the secondary coil is acquired, the acquired position level signal is transmitted to the power transmission device as the reference, and the higher-level device is stored in the first storage unit in the power transmission device Performing a test of the position detection function of the power receiving device as the inspection sample by reading the position level signal being
A test method for a power transmitting device or a power receiving device. A test method for a power transmitting device or a power receiving device according to claim 2 or 4,
When the power receiving device is a reference and the power transmission device is a test sample, the power transmission device as the test sample is in at least one of a period during which the authentication process is performed and a period during which the normal power transmission is performed. Based on a coil end signal obtained from the coil end of the primary coil, and using the foreign object detection threshold information transmitted from the power receiving device as the reference as a detection reference, The presence or absence of foreign matter between the secondary coil is detected, and the host device reads foreign matter detection result information stored in the first storage unit, thereby detecting foreign matter of the power transmission device as the inspection sample. Perform functional tests,
When the power transmission device is a reference and the power reception device is a test sample, the power transmission device as the reference is at least one of a period during which the authentication process is performed and a period during which the normal power transmission is performed. Based on the coil end signal obtained from the coil end of the primary coil, and using the foreign object detection threshold information transmitted from the power receiving device as the reference as a detection reference, the primary coil and the The presence / absence of foreign matter between the secondary coil is detected, and the host device reads out foreign matter detection result information stored in the first storage unit, and thereby the foreign matter detection function of the power receiving device as the inspection sample. Run the test,
A test method for a power transmitting device or a power receiving device. A test method for a power transmitting device or a power receiving device according to claim 10,
The foreign object detection in the period during which the authentication process is performed is performed by the power transmission device as a reference or inspection sample, the voltage level of the coil end signal of the primary coil changing according to the presence or absence of the foreign object, and the primary coil It is performed by detecting at least one of the phase characteristics of the coil end signal based on the drive signal of the primary coil,
In the period during which normal power transmission is performed, the foreign object detection is performed by receiving the signal intermittently transmitted from the power receiving device as a reference or inspection sample based on the coil end signal. A test method for a power transmitting apparatus or a power receiving apparatus, characterized in that it is performed by detecting whether or not it can be performed. A test method for a power transmitting device or a power receiving device according to claim 10 or 11,
Prepare a plurality of power receiving devices as a reference, for each of the prepared power receiving devices, each of the characteristics of the power receiving device and the foreign object detection threshold information,
Detecting the presence or absence of the foreign matter in a state where each of the prepared plurality of power receiving devices is opposed to a power transmitting device as a test sample,
The host device performs a foreign object detection function confirmation test by reading foreign object detection result information for each of the plurality of power receiving devices stored in the first storage unit. How to test the equipment. A test method for a power transmitting device or a power receiving device according to claim 1,
A power transmission device as a reference performs normal power transmission to a power reception device as a test sample, and operation history information of the power reception device in a period after the normal power transmission is stored in the first storage unit in the power reception device. Accumulate,
The power transmission device or the power receiving device testing method, wherein the host device performs an operation check test after normal power transmission by reading the operation history information of the power receiving device accumulated in the first storage unit. . The power transmission device in a non-contact power transmission system that supplies power from a power transmission device to a power reception device via an electromagnetically coupled primary coil and secondary coil,
A power transmission device comprising the first storage unit and the interface unit used when executing the power transmission device or power reception device test method according to any one of claims 1 to 13. The power receiving device in a non-contact power transmission system that supplies power from a power transmitting device to a power receiving device via an electromagnetically coupled primary coil and secondary coil,
A power receiving device comprising the first storage unit and the interface unit used when executing the test method for the power transmitting device or the power receiving device according to any one of claims 1 to 13.   A non-contact power transmission system comprising: the power transmission device according to claim 14; and the power reception device according to claim 15.

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