SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 VERSION V1.0 NAMEWLC ECU Product Specification PRODUCT MODELWLC ECU PRODUCTCODE21532 CUSTOMER NAMEVINFAST FILE TYPE HW SW STRUOTHER TEST DOCUMENT DESIGN DOCUMENT SECRECY INTERNAL EXTERNAL NO ALL WRITE BYCHUN ZHANG CHECK BYLAIJIAFU APPROVE BYZHANGJUNYONG 2023-03-02 2023-03-02 2023-03-02 0 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 Document revision of resume Num. Ver. Content Date Make BY Remark 1 V1.0 first edition 2023-03-02 CHUN ZHANG 1 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 1 Overview ....................................................................................................................................... 3 1.1 background ................................................................................................................................ 3 1.2 Product function description ........................................................................................................ 3 1.3 Product index function parameter ................................................................................................ 3 1.4 Connector model and interface definition ..................................................................................... 4 2 Product function description ......................................................................................................... 5 2.1 Description of product structure .................................................................................................. 5 2.1.1 Appearance and requirements ................................................................................................ 5 2.1.2 Structural dimension/material/weight composition .................................................................. 5 2.1.3 Module installation instructions ............................................................................................. 6 2.1.4 Efficiency test results of the whole machine ........................................................................... 6 2.2 Detailed description of product software ...................................................................................... 7 2.2.1 Communication method and Protocol Description ................................................................... 9 2.2.2 Description of realization method of product software protection function. .............................. 9 2 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 1 Overview 1.1 background The content described in this document applies to VINFAST Automobile VFe34S project 1.2 Product function description This product can provide charging service for wireless charger receiver that supports QI standard. 1.3 Product index function parameter Num. Technical index function Design parameter value identification Remark 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 input voltage 9-16V Input current 2A@12V output voltage 12V/5V 1.25A12V 1A5V 15W(max) 50mA(average current) NA NA Output voltage: The output voltage at the receiving end input voltage>11V input voltage11V Compatible with 5 w Not a normal power supply does not do the requirement Not a normal power supply does not do the requirement 60%@5W Coil distance 4mm test The distance is the distance between the transmitter coil and the receiver coil Distance between transmitting and receiving coils7mm 38mm 60*20mm 12710KHz
-30+80
-40+90 output current output power Standby current Sleep current static current System conversion efficiency Effective charging distance Effective charging range Working frequency Working temperature Storage temperature Protection grade IP52 Qi certification QI 1.2.4 Protection function Overtemperature protection, overcurrent protection, overvoltage protection and undervoltage 3 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 protection and other protection functions 1.4 Connector model and interface definition PCBConnector model brand Type of wire end connector 34793-0080 Molex 34791-0080 Brand Molex Connector diagram PIN 1 4 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 2 Product function description 2.1 Description of product structure 2.1.1 Appearance and requirements The appearance should be clean and tidy, and there should be no dents, obvious scratches, cracks, deformations, burrs, mildew and other defects on the surface. Surface coating should not bubble, crack, fall off; Parts should be fastened without looseness. 2.1.2 Structural dimension/material/weight composition Size 5 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 The material, weight and quantity of materials used in the structure are shown in the following table:
NO. name material weight (g) quantity PC+ABS ADC12 component AL5052 C1018 1 2 3 4 5 On the cover The shell PCBA component shield Cross grooved countersunk head screw Total weigh t About300g 2.1.3 Module installation instructions 1 1 1 1 4 2.1.4 Efficiency test results of the whole machine 15W/MP-A13 Scheme test efficiency Efficiency test method: efficiency
=Pout/Pin Test results:
6 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 2.2 Detailed description of product software Software Overview:
1This product software solution is a reference platform for 15W multi-coil transmitter and is designed for wireless charging application of vehicles based on KF32A140 sending controller IC. 2The controller IC manages and performs all the control functions required to implement the wireless charging transmitter solution. 3The solution provides a high-performance wireless charging system that also takes into account the complex working environment of the vehicle. 4The design conforms to the latest Qi specification of wireless charging Alliance and has been certified by MP-A13 transmitter. NUV provides a set of WCT Library for wireless charging transmission of 15W series wireless charging IC, and encapsulates the wireless charging function, so that the development of wireless charging function does not have to pay too much attention to the specific hardware implementation. Therefore, the software operation hierarchy of the whole system is as follows:
7 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 Software is layered from bottom to top as follows:
1 Kernel and peripheral driver layer: this layer realizes the underlying hardware configuration and initializes the operation parameters of the MCU system. 2Driver interface layer: this layer realizes the interaction between the driver layer and other levels, which is conducive to the migration of the chip platform. 3Hardware abstraction layer: This layer is the WCT Library hardware abstraction layer (WCT HAL) API, and the WCT library API, providing the following functions:
library version number query library function main entry function the declaration of all kinds of the callback function coil operation related definitions timer related definitions voltage, electric current sensor is defined interrupts enabled definition, etc 4. WCT library: This layer realizes the control algorithm of wirelessly charged invert full bridge, the control algorithm of lift-voltage transform circuit, and the detection algorithm of FOD, including the following main modules:
WPC Qi Or PMA state machine coil selection Qi or PMA communication decoding 8 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 PID power transmission control foreign body detection 5Application layer: This layer realizes the interactive processing of external information, the state transition mechanism of wireless charging, and the fault diagnosis of LIN. Software features of this product:
The system is developed on the basis of the on-board wireless charging platform scheme developed by NUV for many years, taking into account charging efficiency, structural optimization and other factors.Scenario, the power transform part is mainly composed of DCDC buck step-down module and A full bridge inverter resonant DC module, DC part adopts DCDC buck regulating chip automatically adjust the output voltage, the MCU is according to the power error at the receiving end, output A D/A conversion of the output of the reference voltage as the voltage regulator chip reference level, eventually adjusted the DC output voltage of inverter part as input, and the control of inverter part work for fixed fixed frequency and duty ratio (50%), so that you can adjust the DCDC output voltage to adjust output power. By using the above control mode, our actual test results show that the inverter has obvious advantages over the inverter in EMC performance. based WPC MP A13 (grace wisdom pu topology);
free wireless charging platform more than 10 w coil position, has a fixed frequency;
integrated on a chip digital demodulation;
support based on the quality factor (Q factor) change in power loss calculation and calibration;
support multiple types of RX modulation signal (ac capacitance, ac resistance and dc resistance). support low standby function and ignition control logic;
support other functions, such as the LIN communication, over voltage, over current, over temperature protection, etc.;
2.2.1 Communication method and Protocol Description LIN communication:
support LIN V2.1 agreement;
support based on UDS diagnosis LIN online diagnosis, upgrade function;
transfer rate of up to 20 kbit/s;
The list of communication matrix can be prepared by referring to LIN Communication Matrix Template. AN diagnostic questionnaire can be compiled by referring to the TEMPLATE of LIN Diagnostic Questionnaire. 2.2.2 Description of realization method of product software protection function. Various protection functions and methods implemented by the software are as follows:
1. Overvoltage protection: Stop charging when the input voltage of the power supply is greater than 9 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 1. When a foreign object is detected near the upper part of the transmitting end, the quality factor of the transmitting end coil, namely the Qmea value, is detected;
2. The receiving end will send a reference Q value (see QI Protocol 1.2.2 for specific definition) to the transmitting end during the negotiation stage of communication with the transmitting end;
3. After receiving the reference Q value transmitted by the receiving end, the transmitter will calculate a threshold Qth value, which is at least 10% lower than the reference Q value. In addition, considering component error and measurement error, the threshold Qth value will be lower than 90% of the reference Q value;
4. If the quality factor Qmea of the transmitter coil is greater than the threshold Qth, then it is considered that there is no foreign body; If the Qmea is less than Qth, the foreign body is considered to be present and the power conversion is terminated simultaneously. Method 2: Detect the difference of power loss 11 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 As shown in Figure 1, the schematic diagram of power loss difference to detect foreign bodies:
The definition in figure 1 is as follows:
PPTdefineThe net output power of the emitter is equal to the input power of the emitterPinMinus the loss of the transmitter itselfPPTLOSS PPR define The total power received by the receiver is equal to the net output power of the receiverPoutPlus the loss of the receiving end itselfPPRLOSS PLossIs the net output power of the transmitterPPTAnd the total power received by the receiverPPR The definition in figure 2 is as follows:
MaximunPdeltaIs the calibration value of the receiving end, and its size definition is shown in the table 2 above This method is to judge whether there is foreign matter by the difference of power loss between the transmitter and the receiver,ifPLossLess than or equal toMaximunPdeltaNo foreign body was believed to exist; ifPLoss is greater thanMaximunPdeltaIt is considered that the power conversion is terminated simultaneously in the presence of foreign bodies. The foreign body recognition function is tested by placing coins Schematic diagram of placing coins Test method: put the receiving end on the transmitting end first, and put the coin after the receiving end works stably COINS TXvol tage
(V) TX(curre nt)
(A) TX input power W RX voltage V RX output power W Power loss W FOD Wheth er recog nitio FODIdenti fy timeS RX(curre nt) A 12 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 NO 12.26 1.695 20.78 11.9 12.26 1.812 22.22 11.9 1.27 1.27 15.11 5.67 15.11 7.1 n NO NO
12.26 1.982 24.3 11.9 1.27 15.11 9.19 YES 1.5S Positio n 2 Positio n 1 Warning NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
- This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. This equipment complies with FCC and IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance of 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This device complies with part 15 of the FCC rules and RSS-216 of Industry Canada. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes : (1) l'appareil ne 13 SHENZHEN INVISPOWER TECHNOLOGY CO., LTD. document numberYG-PM0200-002 doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. This Class B digital apparatus complies with Canadian ICES-001. Cet appareil numrique de la classe B est conforme la norme NMB-001 du Canada. 14