Wireless power transmitting chip and wireless charging system applying same

Abstract

The application discloses a wireless power transmitting chip and a wireless charging system applying the same, the wireless power transmitting chip is built-in identity authentication algorithm and fast charging protocol, and is applied to a transmitting module; the transmitting module responds to a wireless charging identity authentication request of a receiving module, and carries out mutual identity authentication with the receiving module; if the identity authentication is passed, the transmitting module and the receiving module further carry out fast charging protocol authentication; if the fast charging protocol authentication is passed, the transmitting module sends power greater than a first power to the receiving module. On the basis of being capable of realizing identity authentication function and fast charging protocol authentication function to guarantee wireless charging safety, the application does not increase the communication interface of the chip, and simplifies the verification steps.

Description

Technical Field

[0001] This invention relates to the field of power electronics, and in particular to a wireless power transmitter chip and a wireless charging system using the same. Background Technology

[0002] Qi is a wireless charging standard launched by the Wireless Power Consortium (WPC), the world's first organization to promote the standardization of wireless charging technology. It boasts two main characteristics: convenience and universality. First, products from different brands, as long as they bear the Qi logo, can be charged with a Qi wireless charger. Second, it overcomes the technical bottleneck of wireless charging's universality; mobile phones, cameras, computers, and other products can all be charged with Qi wireless chargers, making large-scale application of wireless charging possible.

[0003] USB-PD (Power Delivery) is a power supply standard based on USB Type-C, with a maximum power output of up to 100 watts (W). With the widespread adoption of USB Type-C, more and more devices (phones, tablets, monitors, workstations, chargers, etc.) are using USB-PD fast charging solutions. Type-C is a type of USB interface that can be inserted either way and supports standard USB functions such as charging, data transfer, video transmission, audio transmission, and display output. Support for USB-PD enables power delivery up to 100W.

[0004] The existing wireless fast charging authentication technology solution's transmitter module consists of a wireless power transmitter chip, a 5-15W full-bridge circuit, an identity authentication chip, a fast charging protocol chip, and a wireless communication module. The wireless power transmitter chip needs to communicate with the identity authentication chip and the fast charging protocol chip to complete identity authentication and fast charging protocol authentication. This requires the wireless power transmitter chip to add multiple communication ports to communicate with the identity authentication chip and the fast charging protocol chip, increasing system costs. Furthermore, wireless charging identity authentication and fast charging protocol authentication are also relatively complex. Summary of the Invention

[0005] The purpose of this invention is to provide a wireless power transmitter chip that integrates identity authentication and fast charging protocol authentication, and a wireless charging system using the same chip. This invention can reduce the number of interfaces on the wireless power transmitter chip and simplify the communication steps, thereby solving the problem of existing wireless power transmitter chips having many interfaces and complex communication steps.

[0006] To achieve the above objectives, the present invention provides a wireless power transmitter chip with built-in authentication algorithm and fast charging protocol, which is applied in a transmitter module;

[0007] The system responds to the wireless charging authentication request from the receiving module to enable authentication between the transmitting module and the receiving module.

[0008] If the identity authentication is successful, the wireless power transmitter chip is also used to implement fast charging protocol authentication between the transmitter module and the receiver module; if the fast charging protocol authentication is successful, the transmitter module sends power greater than the first power to the receiver module.

[0009] Optionally, multiple authentication algorithms are internally configured. Based on the wireless charging request sent by the receiving module, the wireless power transmitter chip selects at least one authentication algorithm to implement authentication between the transmitter module and the receiving module.

[0010] Optionally, multiple fast charging protocols are internally configured. After successful identity authentication, the wireless power transmitter chip selects at least one fast charging protocol to implement fast charging protocol authentication between the transmitter module and the receiver module.

[0011] Optionally, it includes an encryption / decryption module and a logic controller. The encryption / decryption module has a built-in identity authentication algorithm and fast charging protocol to realize identity authentication and fast charging protocol authentication between the transmitting module and the receiving module. The logic controller is used to control the encryption / decryption module.

[0012] Optionally, an MCU, a built-in authentication algorithm, and a fast charging protocol are included to achieve authentication of identity and fast charging protocol between the transmitting module and the receiving module.

[0013] Optional, also includes:

[0014] The modulation and demodulation module has a built-in window filtering algorithm to realize information transmission between the transmitting module and the receiving module in half-duplex communication mode;

[0015] The secure storage module is used to store device information, identity authentication information, and fast charging protocol authentication information;

[0016] Anomaly detection module is used to detect abnormal faults in the wireless power transmitter chip.

[0017] Optionally, the secure storage module is a non-lossable module with a physical protective layer on its surface.

[0018] Optionally, the anomaly detection module includes clock fault detection, input fault detection, temperature anomaly detection, radiation anomaly detection, light anomaly detection, and cover opening fault detection. Based on the detected fault type, the wireless power transmitter chip selects the corresponding protection mode.

[0019] Optionally, the security verification algorithm includes: AES verification algorithm, DES verification algorithm, 3DES verification algorithm and RSA verification algorithm.

[0020] Optionally, the fast charging protocol includes: fast charging protocol, QC protocol, FCP protocol, SCP protocol and VOOC protocol.

[0021] This invention also provides a wireless charging system that receives a wireless charging certificate chain and a fast charging certificate chain generated by an external system; including,

[0022] The receiving module initiates a wireless charging authentication request;

[0023] The transmitting module, including any of the wireless power transmitting chips described above, responds to the wireless charging authentication request and performs mutual authentication with the receiving module according to the wireless charging certificate chain; if the authentication is successful, the transmitting module performs fast charging protocol authentication with the receiving module according to the fast charging certificate chain; if the fast charging protocol authentication is successful, the transmitting module sends power greater than the first power to the receiving module.

[0024] Optionally, the receiving module generates an ECDSA digital signature and initiates a wireless charging authentication request;

[0025] The transmitting module responds to the wireless charging authentication request and performs ECDSA verification calculation based on the ECDSA digital signature.

[0026] If the transmitting module successfully verifies the signature, the key management system sends the certificate in the wireless charging certificate chain to the receiving module, and the receiving module performs ECDSA signature verification calculation.

[0027] If the receiving module successfully verifies the signature, it also receives the certificate in the fast charging certificate chain and performs ECDSA signature verification again. If the receiving module successfully verifies the signature, it sends wireless charging power configuration information to the transmitting module, and the transmitting module sends power greater than the first power to the receiving module.

[0028] Optionally, if the signature verification fails in either the transmitting module or the receiving module, the transmitting module sends a power less than the first power to the receiving module and terminates the wireless power transmission.

[0029] Optionally, the receiving module performs an ECDSA verification operation for each certificate received from the wireless charging certificate chain until the verification is successful; if the receiving module fails to verify all certificates in the wireless charging certificate chain, then the identity verification and wireless power transmission are terminated.

[0030] Optionally, the receiving module performs an ECDSA verification operation for each certificate received from the fast charging certificate chain until the verification is successful; if the receiving module fails to verify all certificates in the fast charging certificate chain, the fast charging verification and wireless power transmission will end.

[0031] Compared with the prior art, the technical solution of the present invention has the following advantages: The wireless power transmitter chip of the present invention has built-in identity authentication algorithm and fast charging protocol authentication algorithm. While ensuring wireless charging safety by realizing identity authentication function and fast charging protocol authentication function, it does not increase the communication interface of the chip, thus simplifying the verification steps. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a fast charging system including a wireless power transmitter chip, as described in this invention.

[0033] Figure 2 This is a schematic diagram of a fast charging system including another wireless power transmitter chip according to the present invention;

[0034] Figure 3 This is a flowchart of the wireless power safety verification process of the present invention. Detailed Implementation

[0035] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention.

[0036] To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the invention, but those skilled in the art can fully understand the invention without these details.

[0037] The invention is described in more detail below by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0038] A wireless charging system has a base station with one or more transmitting modules. These modules are powered by an AC-to-DC inverter and transmit the power to a receiver in the mobile device via strongly coupled inductor pairs. The amount of power transmitted to the mobile device is controlled by the wireless power receiver by sending communication packets to the transmitting modules to increase, decrease, or maintain the power level. Communication from the receiver to the transmitter is purely digital, consisting of 1s and 0s. Communication between the transmitter and receiver is achieved via Frequency Shift Keying (FSK) modulation on the power signal, while the communication protocol between the receiver and transmitter uses Frequency Shift Keying (ASK).

[0039] A key feature of wireless charging systems is that the transmitter module remains in standby mode when not supplying power. The transmitter stays in standby and periodically pings until a receiver is detected. Once an extended power receiver is detected, an authentication process begins. Successful authentication allows the transmitter module to provide up to 15W of output power; otherwise, it provides only 5W or no power. If a reference power receiver is present, the transmitter module will only provide 5W of output power.

[0040] Figure 1 This invention provides a schematic diagram of a fast charging system using a wireless power transmitter chip. The system includes a transmitter module, a coil device, and a receiver module. The transmitter module comprises a wireless communication module and a wireless power transmitter chip. The receiver module includes a wireless power receiver chip, a main control chip, and a wireless communication module. The main control chip in the receiver module can be an MCU, microprocessor, or micrologic controller responsible for information processing, control, and authentication. The wireless power receiver chip receives AC energy through a receiving coil, controls system efficiency, and transmits the rectified and filtered DC power to a downstream voltage adjustment circuit (not shown in the diagram). The wireless communication devices in both the transmitter and receiver modules are used for information transmission. Additionally, some circuit devices in the transmitter and receiver modules are not shown in the diagram. For example, the transmitter module includes an AC / DC converter, and the receiver module includes a power supply circuit to power the receiver module.

[0041] The wireless power transmitter chip in this solution integrates identity authentication and fast charging protocol functions. It incorporates multiple sets of security authentication algorithms and fast charging protocol algorithms, including PD, QC, FCP, SCP, and VOOC fast charging protocols, and multiple sets of security verification algorithms, including AES, DES, 3DES, and RSA verification algorithms. This wireless power transmitter chip can integrate the latest and most commonly used fast charging protocols and security verification algorithms, selecting at least one set for identity authentication and fast charging protocol authentication as needed. This invention significantly improves chip integration, reduces power consumption, lowers costs, and simplifies the layout and wiring of the transmitter module, resulting in a smaller PCB area. Because fast charging protocols and identity authentication functions are integrated within the chip, software development difficulty is reduced, software compatibility is improved, and code is easier to maintain.

[0042] The wireless power transmitter chip illustrated in the diagram includes an MCU, which controls the various modules of the wireless transmitter chip. It can be an 8-bit MCU or a 32-bit processor, preferably a 32-bit ARM core or RISC-V core processor for better performance. It has built-in encryption and decryption algorithms for mutual authentication with the receiving module, including identity authentication and fast charging protocol authentication. It mainly consists of an elliptic curve algorithm module (ECC-256), a secure hash algorithm module (SHA-256), and a pseudo-random number generator module (PRNG), which can realize functions such as elliptic curve key pair generation and digital signature operation, SHA-256 hash value generation, and pseudo-random number generation.

[0043] The Security NVM is used to store digital certificates and keys. To prevent intrusion attacks from reading the contents of the memory through test probes, a physical protection layer (preferably a metal shielding layer) is added to the top layer of the memory. To prevent non-intrusive attacks through power consumption analysis and other attack methods, the memory bus is scrambled to prevent the address and data buses from being intercepted. The Security NVM is a non-volatile memory, and its type can be multiple-programmable memory (MTP), flash memory, or electrically erasable programmable read-only memory (EEPROM).

[0044] An anomaly detection module is used to detect chip faults. In cryptography, attacks can be performed by injecting one or more faults into a device, thereby disrupting its functional behavior. Common techniques for fault injection include introducing changes in source voltage, clock frequency, temperature, or laser beam irradiation. The anomaly detection module of this invention is used to detect various threats belonging to Fault Injection Attacks (FIA): 1) Input clock frequency (clock fault, overclocking): shortening the clock cycle to induce critical path conflicts. 2) Input voltage (power supply fault, insufficient power): reducing the power supply voltage to increase the propagation delay of combinational logic. 3) Temperature (heating): modifying the temperature to increase propagation delay. 4) Radiation (laser spot, light spot, electromagnetic): setting or resetting bits in the radiation trigger register. 5) Light detection (open cover detection): based on an embedded dual-gate CMOS light sensor, an alarm signal is triggered when the chip package is opened. The anomaly detection module converts all monitored environmental changes inside the chip into electrical signals, which are then measured. When a threat is detected, it provides the system with a measured threat level and issues a hardware alarm to the logic controller. The logic controller then activates the corresponding protection mode based on the alarm level. If the alarm signal is of the highest level, the key and digital certificate stored in the security memory will be cleared to prevent the key from being stolen. This module can detect various anomalies, including: clock failure attack detection, watchdog timer underfeed attack detection, power failure attack detection, temperature attack detection, electromagnetic fault injection (EMFI) attack detection, laser fault injection attack detection, and open-lid detection.

[0045] The modulation and demodulation module includes an amplitude shift keying (ASK) decoding circuit, a pulse width modulation (PWM) generator, and a frequency shift keying (FSK) modulation circuit. The intraband transmission method of the wireless charging system via the modulation and demodulation module is as follows: the transmitting module decodes the digital information sent by the receiving module through the ASK decoding circuit, including authentication request information and energy transfer requirements; the transmitting module uses the FSK modulation circuit to load the communication signal and authentication result into the AC energy of the coil, and then transmits it to the receiving module. Through ASK decoding and FSK modulation, the transmitting and receiving modules achieve information transmission in a half-duplex communication mode.

[0046] According to the latest WPC Qi 1.3 protocol and fast charging protocol requirements, identity authentication needs to use digital signatures. This method requires the transmission of more digital information than previous authentication methods. Furthermore, in-band transmission suffers from poor anti-interference capabilities due to errors caused by electromagnetic coupling variations, load variations, carrier duty cycle variations, and measurement quantization. This invention introduces a window filtering algorithm into the traditional width-measurement FSK demodulation method, significantly improving the anti-interference capability of the width-measurement method and ensuring the accuracy of large-volume data transmission.

[0047] The receiver starts with an FM square wave and demodulates the information data based on the pulse frequency to complete the final link in the forward communication. The pulse width measurement demodulation method first captures the width of adjacent high (or low) levels based on the input signal, thus obtaining the width of each pulse. The frequency is then determined based on the width, and decoding is performed based on the frequency transitions and counting of the pulses. The window filtering algorithm, based on the determined frequency of each cycle, designs a window of a certain length. Within the window, the frequencies of the current cycle and several previous cycles can be observed. The effective frequency of the current cycle is determined based on the number of high and low frequencies within the window, thus enhancing the anti-interference capability of frequency state changes. Decoding is then performed based on the changes in the effective frequency state.

[0048] The communication between the wireless charging transmitter module and the wireless charging receiver module can be either in-band transmission (IB) or out-of-band transmission (OOB). Compared to in-band transmission, out-of-band transmission offers higher data rates and stronger anti-interference capabilities. Out-of-band transmission is achieved through a wireless communication module, which can be a Wi-Fi, Bluetooth, Bluetooth LE, ZigBee, Near Field Communication (NFC), Ultra Wideband (UWB), or 2G / 3G / 4G / 5G module.

[0049] In addition, the PWM modulation method of wireless charging is implemented by a half-bridge converter (not shown in the figure). The PWM (changing duty cycle) adjustment control is achieved by the half-bridge converter driver circuit (H-Bridge Driver). The coil and capacitor form a series resonant circuit to maximize the wireless transmission power.

[0050] The wireless power transmitter chip of the present invention also includes modules not shown in the figure, such as a fast charging transceiver module (fast charging PHY), static random access memory (SRAM), internal bus (BUS), program memory, Q-value detection module (Q_Detect), interface circuit, half-bridge converter drive circuit, and power management module (PowerManagement).

[0051] This invention employs an internal single-bus architecture, where the logic controller communicates with SRAM, Program Memory, PRNG, Security Engine, fast-charging PHY, and Interface modules via a bus. The advantages of this architecture include: full utilization of IP technology, reducing product design complexity and development costs; single-chip integrated circuits effectively reducing system power consumption; reducing the number of external pins, simplifying system fabrication complexity; reducing signal transmission between peripheral driver interface units and circuit boards, accelerating data transmission and processing speed; and embedded circuitry reducing or even eliminating system signal crosstalk caused by circuit board signal transmission.

[0052] The Power Management module integrates a 5V buck chopper and 1.8V / 3.3V low dropout linear regulators (LDOs) to provide the different voltage sources required by the internal MCU and various functional modules.

[0053] When metallic objects such as coins, keys, and paperclips are exposed to an alternating magnetic field, eddy currents flowing through the object heat it. The heat generated depends on the amplitude and frequency of the magnetic field and the object's characteristics (such as resistivity, size, and shape). In any wireless power system, the heat generated by eddy currents manifests as power loss, reducing the overall efficiency of the system. If not properly managed, this heating can lead to unsafe situations. In extended power systems, there are two stages of foreign object detection (FOD). One is measuring the system's quality factor before entering the power transmission stage, and the other is measuring the power loss difference between the received and transmitted power during the power transmission stage.

[0054] Before entering the power transfer phase, when the wireless power receiver or a metal object is placed on its surface, the Q-detect module detects a change in the coil quality factor (Q factor). The transmitter module measures the Q factor and compares it to a reference Q factor provided by the receiver. If the difference is higher than the reference Q factor, the transmitter module identifies it as a FOD and shuts down the system. The second stage of foreign object detection involves continuously measuring the power loss difference between the received and transmitted power during power transfer and comparing it to a threshold specified in WPC-1.3. If the difference is higher than the threshold set by the WPC specification, the system will shut down to avoid overheating.

[0055] The fast charging transceiver module (fast charging PHY) integrates the physical layer and protocol stack of USB dual-phase mark-coded (BMC) power supply (fast charging 2.0 / 3.1 protocol), and can directly obtain high-power output from power adapters that support the fast charging protocol.

[0056] Program memory can be a mask ROM, an one-time programmable ROM, a multiple-programmable ROM (MTP ROM), or a flash ROM. With a mask ROM, the firmware is burned in during chip manufacturing and cannot be changed after the chip leaves the factory. With an OTP ROM, the firmware is burned in during final testing (FT) at the manufacturer and cannot be changed after the product is sold. MTP ROMs and flash ROMs can be erased and rewritten multiple times, allowing the manufacturer to modify the firmware according to customer needs.

[0057] like Figure 2 The diagram illustrates the principle of a fast charging system using another wireless power transmitter chip according to the present invention, which is similar to... Figure 1 The difference lies in the following: a separate encryption / decryption module is set up in the wireless power transmitter chip, with built-in authentication and encryption / decryption algorithms for identity authentication and fast charging protocol authentication. This module mainly consists of an elliptic curve algorithm module (ECC-256), a secure hash algorithm module (SHA-256), and a pseudo-random number generator module (PRNG), enabling functions such as elliptic curve key pair generation and digital signature operations, SHA-256 hash value generation, and pseudo-random number generation. Additionally, a logic controller is included, which can use a finite state machine to control the various modules within the wireless power transmitter chip. In this embodiment, the functions achieved by the separate encryption / decryption module and the logic controller are similar to... Figure 1 The MCU implements the same functions. If a separate MCU is used, the algorithm processing speed is slow and the power consumption is high, but the encryption and decryption algorithms can be flexibly selected as needed, and the information authentication steps can also be adjusted as required. If an encryption and decryption module is used, the logic controller has low requirements for computing power, while the encryption and decryption module is professionally designed for encryption and decryption algorithms, resulting in fast processing speed and low power consumption. However, information transmission and control are required between the logic controller and the encryption and decryption module, and the information authentication steps are fixed. But regardless of whether the encryption and decryption algorithm is built into the MCU or the encryption and decryption module is used, the wireless power chip of this invention does not require the addition of multiple communication ports.

[0058] like Figure 3The diagram illustrates the wireless fast charging security verification flowchart of the present invention. The wireless power transmitter chip of the present invention receives a certificate chain generated by an external system, such as an external server. This certificate chain is stored within the secure storage module of the present invention. The certificate chain consists of two parts: the first part is a WPC certificate chain, containing: a first certificate (the hash value of the WPC root certificate), a second certificate (the CA certificate of the product manufacturer), and a third certificate (the corresponding public authentication message information for each individual identified product (e.g., a wireless charging transmitter module). ECC-256 encryption is performed through the security authentication system, and each individual public authentication message can be uniquely paired with the private key of an individual identified product. The private key of an individual identified product can be used to encrypt or decrypt message data in a pair of electronic devices to be authenticated (e.g., the transmitter module and receiver module of a wireless charging device) using ECC-256. Such a certificate chain can be paired with the private key of the corresponding public authentication message.

[0059] The second part is the USB fast charging certificate chain, which includes: a first certificate: the hash value of the USB-IF root certificate; a second certificate: the CA certificate of the product manufacturer; and a third certificate: corresponding public authentication message information for each individual identified product (e.g., a fast charging transmitter module). ECC-256 encryption is performed through a secure authentication system, and each individual public authentication message can be uniquely paired with the private key of a single identified product. The private key of a single identified product can be used to encrypt or decrypt message data in a pair of electronic devices to be authenticated (e.g., a wireless charging transmitter module and receiver module) using ECC-256. This certificate chain can be paired with the private key of the corresponding public authentication message. Based on the above certificate chain, the wireless fast charging steps of the present invention are as follows:

[0060] Step S400: The authentication initiator (receiving module) initiates wireless fast charging identity authentication;

[0061] Step S401: The authentication initiator generates an ECDSA digital signature using (the initiator's private key, the message, and the random number);

[0062] Step S402: The authentication initiator initiates a wireless fast charging authentication request and sends (message, digital signature);

[0063] Step S403: The authentication responder (transmitter module) responds to the wireless fast charging authentication request and receives (message, digital signature);

[0064] Step S404: The authentication responder reads the public key of the authentication initiator stored in SecurityNVM;

[0065] Step S405: The authentication responder initiates Security Engine to perform ECDSA signature verification (authentication);

[0066] Step S406: If the signature verification fails, the authentication responder sends a wireless fast charging authentication failure message and sends power via BPP or does not send power.

[0067] Step S407: The authentication initiator receives the wireless fast charging authentication failure information and either receives BPP power or does not receive power;

[0068] Step S408: If the signature verification is successful, the authentication responder reads a digital certificate stored in the first part of the WPC certificate chain slot within SecurityNVM and sends it to the authentication initiator;

[0069] Step S409: Receive the WPC certificate public key from the server via the wireless communication module and receive a WPC digital certificate from the authentication responder;

[0070] Step S410: The authentication initiator performs ECDSA signature verification (identity verification);

[0071] Step S411: If the signature verification fails, the authentication initiator sends a request to receive the next WPC digital certificate;

[0072] Step S412: The authentication initiator determines whether it has received all certificates stored in the first part of the WPC certificate chain slot within the SecurityNVM; if not, it proceeds to S408 to continue receiving the next digital certificate from the first part of the WPC certificate chain slot. If yes, it proceeds to S421 to end the authentication initiator's authentication and wireless fast charging power transmission.

[0073] Step S413: Receive the fast charging certificate public key from the server via the wireless communication module and receive a fast charging digital certificate from the authentication responder;

[0074] Step S414: The authentication initiator performs ECDSA signature verification (identity verification);

[0075] Step S415: If the signature verification fails, the authentication initiator sends a request to receive the next fast charging digital certificate;

[0076] Step S416: The authentication initiator determines whether it has received all certificates stored in the second part of the fast charging certificate chain slot within SecurityNVM. If not, it proceeds to S417 to continue receiving the next fast charging digital certificate from the second part of the fast charging certificate chain slot. If yes, it proceeds to S421 where the authentication initiator ends authentication and wireless fast charging power transmission.

[0077] Step S417: If the signature verification is successful, the authentication initiator sends the wireless fast charging power configuration information.

[0078] Step S418: Receive wireless fast charging power configuration information;

[0079] Step S419: Adjust the power (change the charging capacity) to send power in EPP fast charging mode;

[0080] Step S420: Receive EPP fast charging power;

[0081] Step S421: End authentication and wireless fast charging power transmission.

[0082] Some steps are executed in the receiving module, while others are executed in the transmitting module. See the appendix for details. Figure 3 .

[0083] Once both fast charging authentication and wireless charging authentication are successful, the wireless power transmitter chip of this invention can obtain a higher voltage from the power adapter through the fast charging transceiver module to provide fast wireless charging power to the receiving module.

[0084] In addition, although the embodiments are described and illustrated separately above, some common technologies are involved, and those skilled in the art can replace and integrate them between the embodiments. If there is any content not explicitly described in one embodiment, then another embodiment that is described can be referred to.

[0085] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A wireless power transmitting chip, characterized in that: an identity authentication algorithm and a fast charging protocol are built-in and applied to a transmitting module; in response to a wireless charging identity authentication request from a receiving module, identity authentication between the transmitting module and the receiving module is implemented; if the identity authentication is passed, the wireless power transmitting chip is further configured to implement fast charging protocol authentication between the transmitting module and the receiving module; if the fast charging protocol authentication is passed, the transmitting module sends power greater than a first power to the receiving module; a plurality of sets of identity authentication algorithms are built-in, and according to a wireless charging request sent by the receiving module, the wireless power transmitting chip selects at least one set of identity authentication algorithms to implement identity authentication between the transmitting module and the receiving module; a plurality of sets of fast charging protocols are built-in, and after the identity authentication is passed, the wireless power transmitting chip selects at least one set of fast charging protocols to implement fast charging protocol authentication between the transmitting module and the receiving module; a decryption module and a logic controller are included, the decryption module is built-in with the identity authentication algorithm and the fast charging protocol to implement identity authentication and fast charging protocol authentication between the transmitting module and the receiving module; the logic controller is configured to control the decryption module; alternatively, an MCU is included, which is built-in with the identity authentication algorithm and the fast charging protocol to implement identity authentication and fast charging protocol authentication between the transmitting module and the receiving module. 2.The wireless power transmitting chip of claim 1, characterized in that it further comprises: a modulation and demodulation module built-in with a window filtering algorithm to implement information transmission between the transmitting module and the receiving module in a half-duplex communication mode; a secure storage module configured to store device information, identity authentication information and fast charging protocol authentication information; an abnormality detection module configured to detect abnormal faults in the wireless power transmitting chip. 3.The wireless power transmitting chip of claim 2, characterized in that the secure storage module is a non-loss module with a physical protection layer on the surface. 4.The wireless power transmitting chip of claim 2, characterized in that the abnormality detection module includes clock fault detection, input fault detection, temperature abnormality detection, radiation abnormality detection, light abnormality detection and cover opening fault detection, and according to the detected fault type, the wireless power transmitting chip selects a corresponding protection mode.

5. The wireless power transmitting chip according to claim 1, characterized in that the identity authentication algorithm comprises: AES verification algorithm, DES verification algorithm, 3DES verification algorithm and RSA verification algorithm.

6. The wireless power transmit chip of claim 1, in a feature wherein the fast charge protocol comprises: PD protocol, QC protocol, FCP protocol, SCP protocol and VOOC protocol.

7. A wireless charging system, characterized by: wireless charging certificate chains and fast charging certificate chains generated by an external system are received; including, a receiving module configured to initiate a wireless charging identity authentication request; a transmitting module including the wireless power transmitting chip of any one of claims 1-6, configured to respond to the wireless charging identity authentication request and perform mutual identity authentication with the receiving module according to the wireless charging certificate chains. If the identity authentication is passed, the transmitting module performs fast charging protocol authentication with the receiving module according to the fast charging certificate chain, and if the fast charging protocol authentication is passed, the transmitting module sends power greater than the first power to the receiving module.

8. The wireless charging system of claim 7, wherein: the receiving module generates an ECDSA digital signature and initiates a wireless charging identity authentication request; the transmitting module responds to the wireless charging identity authentication request and performs ECDSA signature verification operation according to the ECDSA digital signature; if the transmitting module succeeds in the signature verification, the key management system sends a certificate in the wireless charging certificate chain to the receiving module, and the receiving module performs ECDSA signature verification operation; if the receiving module succeeds in the signature verification, the receiving module further receives a certificate in the fast charging certificate chain and performs ECDSA signature verification operation again; if the receiving module succeeds in the signature verification, the receiving module sends wireless charging power configuration information to the transmitting module, and the transmitting module sends power greater than the first power to the receiving module.

9. The wireless charging system of claim 8, wherein: if the transmitting module or the receiving module fails in the signature verification, the transmitting module sends power less than the first power to the receiving module and ends the wireless power transmission.

10. The wireless charging system of claim 8, wherein: the receiving module performs ECDSA signature verification operation once for each certificate in the wireless charging certificate chain until the signature verification is successful; if the receiving module fails in the signature verification of all the certificates in the wireless charging certificate chain, the identity authentication and the wireless power transmission are ended.

11. The wireless charging system of claim 8, wherein: the receiving module performs ECDSA signature verification operation once for each certificate in the fast charging certificate chain until the signature verification is successful; if the receiving module fails in the signature verification of all the certificates in the fast charging certificate chain, the fast charging authentication and the wireless power transmission are ended.

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