Generator recognizer for automobile

By designing a generator identifier that includes a 12/28V input module, a PWM output module, a 28V step-down module, a 5V power module, and a filter module, the problems of high chip prices, unstable communication, and easy damage in the existing technology are solved, and a low-cost, highly stable generator identifier is realized, which is suitable for 14V and 28V platforms.

CN223327444UActive Publication Date: 2025-09-12JIANGSU YUNYI ELECTRIC
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422548686.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-09-12
Estimated Expiration
2034-10-22

AI Technical Summary

Technical Problem

Existing automotive generator identifiers are subject to problems such as high chip prices, long procurement cycles, unstable communications, and easy damage, especially in high-voltage environments, and cannot meet the needs of 14V and 28V platforms.

Method used

A generator identifier is designed, which includes a 12/28V input module, a PWM output module, a 28V step-down module, a 5V power module, a filter module and a main control chip. The main control chip is protected by protective devices and filter capacitors, the voltage is stepped down to match the adaptability, and noise is filtered during communication to ensure stability and compatibility.

Benefits of technology

A low-cost, highly stable generator identifier suitable for 14V and 28V platforms has been achieved, which improves product safety and communication stability and reduces the risk of chip damage.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223327444U_ABST
    Figure CN223327444U_ABST
Patent Text Reader

Abstract

The utility model discloses an automobile generator recognizer, comprising a 12 / 28V input module and a PWM output module, the 12 / 28V input module is connected with the positive electrode of a generator and the positive electrode of a real vehicle storage battery, the PWM output module is connected with a real vehicle ECU, the 12 / 28V input module is connected with a 28V voltage reduction module, the 28V voltage reduction module is connected with a 5V power supply module through a resistor R5, the 5V power supply module is connected with a filtering module through a resistor R4, and the filtering module is connected with a storage battery. The filtering module is connected with the main control chip, the main control chip is connected with the PWM output module, and the 5V power supply module is connected with the PWM output module. According to the utility model, the protection device is designed and used for protecting the main control chip, so that the product failure caused by external high-voltage pulse is prevented, and the safety of the product is improved; according to the utility model, the filter capacitor is designed and used for filtering communication signals, so that the failure of the recognizer caused by external abnormal signals is prevented, and the stability of the recognizer is improved; the design of the utility model meets the requirements of 14V and 28V compatibility, and can be applied to a 28V commercial vehicle platform.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of automobile generators, in particular to an automobile generator identifier. Background Art

[0002] The generator is a core component in an automobile, providing power to the vehicle's electrical equipment. Currently, increasing vehicle functionality demands are driving increasing vehicle loads, making the output power of a single generator insufficient. Consequently, many vehicles are designed with multiple generators connected in parallel to meet the vehicle's power requirements. When a vehicle uses two or more generators, the onboard computer needs to identify each generator to control it. Currently, the majority of multi-generator identifiers on the market use LIN communication control. The identifier is typically installed on the generator, and the onboard computer uses the generator ID transmitted via LIN messages to identify each generator. Currently available LIN communication identifiers are significantly affected by the chip itself, resulting in high chip prices and long procurement cycles, primarily due to the need for imported chips and technological limitations. LIN communication identifiers also suffer from communication instability and are prone to data loss, primarily due to external signal interference in complex signal environments, leading to unstable or even inaccessible communication. LIN communication identifiers are also susceptible to damage, primarily due to abnormally high voltage pulses during vehicle startup and load dumping, which can damage the chip. LIN communication identifiers can currently only be used on 14V passenger car platforms, mainly because the maximum operating voltage of the chip is 18V, which cannot meet the needs of 28V commercial vehicles. Summary of the Invention

[0003] The purpose of the utility model is to provide a generator identifier for automobiles, which has low cost, stable procurement cycle and good working performance to solve the above problems.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A car generator identifier includes a 12 / 28V input module and a PWM output module. The 12 / 28V input module is connected to the positive pole of the generator and the positive pole of the actual vehicle battery. The PWM output module is connected to the actual vehicle ECU. The 12 / 28V input module is connected to the 28V step-down module.

[0006] The 28V step-down module is connected to the 5V power supply module through the resistor R5;

[0007] The 5V power supply module is connected to the filter module through the resistor R4;

[0008] The filtering module is connected to the main control chip;

[0009] The main control chip is connected to the PWM output module;

[0010] The 5V power supply module is connected to the PWM output module.

[0011] Furthermore, the 28V step-down module is composed of a resistor R6, a resistor R7, a transistor Q7, a voltage stabilizing diode ZD1, and a diode D1;

[0012] The 12 / 28V input module is connected to the resistor R6, the resistor R6 is respectively connected to the resistor R7 and the transistor Q7, the transistor Q2 and the resistor R7 are connected to the voltage stabilizing diode ZD1, the transistor Q2 is connected to the diode D1, and the diode D1 is connected to the resistor R5.

[0013] Furthermore, the 5V power supply module is composed of capacitor C1, power supply IC2, and capacitor C2;

[0014] The resistor R5 is connected to the capacitor C1 and pins 1 and 3 of the power IC2. The capacitor C1 is connected to pin 2 of the power IC2. Pins 2 and 5 of the power IC2 are connected to the capacitor C2. The capacitor C2 is electrically connected to the resistor R4 and VCC_5V.

[0015] Furthermore, the power supply IC2 model is ES5200.

[0016] Furthermore, the filtering module is composed of a capacitor C3 and a TEST1, the resistor R4 is connected to the capacitor C3 and TEST1, and the TEST1 is connected to the main control chip.

[0017] Furthermore, the main control chip model is KF8A100.

[0018] Furthermore, pin 1 of the main control chip is connected to TEST1.

[0019] Furthermore, the PWM output module is composed of resistor R2, resistor R1, transistor Q1, resistor R3, TEST2

[0020] Pins 2 and 20 of the main control chip are connected to resistor R1, pin 18 of the main control chip is connected to TEST2, pin 16 of the main control chip is connected to TEST3, and TEST2 is connected to pin 5 of the power supply IC2;

[0021] The resistor R1 is connected to the transistor Q1 and the resistor R2, the resistor R2 is connected to the transistor Q1, and the transistor Q1 is connected to the resistor R3 and PWM.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model is designed to use a protective device to protect the main control chip, prevent external high-voltage pulses from causing product failure, and improve product safety;

[0024] The utility model uses a filter capacitor to filter the communication signal to prevent the identifier from failing due to external abnormal signals and improve the stability of the identifier;

[0025] The design of this utility model meets the requirements of 14V and 28V compatibility and can be applied to 28V commercial vehicle platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the circuit structure of the utility model. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] Example 1:

[0029] See also Figure 1 , the utility model provides a technical solution:

[0030] A vehicle generator identifier includes a 12 / 28V input module and a PWM output module. The 12 / 28V input module is connected to the positive pole of the generator and the positive pole of the actual vehicle battery. The PWM output module is connected to the actual vehicle ECU. The 12 / 28V input module is connected to a 28V step-down module. The 28V step-down module is connected to a 5V power module via a resistor R5. The 5V power module is connected to a filter module via a resistor R4. The filter module is connected to a main control chip. The main control chip is connected to the PWM output module. The 5V power module is connected to the PWM output module.

[0031] like Figure 1 As shown: the 28V step-down module consists of resistor R6, resistor R7, transistor Q7, Zener diode ZD1, and diode D1. Connect the 12 / 28V input module to resistor R6, connect resistor R6 to resistor R7 and transistor Q7 respectively, connect transistor Q2 and resistor R7 to Zener diode ZD1, connect transistor Q2 to diode D1, and connect diode D1 to resistor R5.

[0032] like Figure 1 As shown: The 5V power supply module consists of capacitor C1, power supply IC2, and capacitor C2. Resistor R5 is connected to capacitor C1 and pins 1 and 3 of power supply IC2, capacitor C1 is connected to pin 2 of power supply IC2, pins 2 and 5 of power supply IC2 are connected to capacitor C2, and capacitor C2 is electrically connected to resistor R4 and VCC_5V. The power supply IC2 model is ES5200.

[0033] like Figure 1As shown: the filter module consists of capacitor C3 and TEST1, the resistor R4 is connected to the capacitor C3 and TEST1, TEST1 is connected to the main control chip, where the main control chip model is KF8A100, and the 1st pin of the main control chip is connected to TEST1.

[0034] like Figure 1 As shown: The PWM output module consists of resistor R2, resistor R1, transistor Q1, resistor R3, and TEST2. Connect pins 2 and 20 of the main control chip to resistor R1, connect pin 18 of the main control chip to TEST2, connect pin 16 of the main control chip to TEST3, connect TEST2 to pin 5 of the power supply IC2, connect resistor R1 to transistor Q1 and resistor R2, connect resistor R2 to transistor Q1, and connect transistor Q1 to resistor R3 and PWM.

[0035] Working principle:

[0036] Connect 12V / 28V GND and PWM GND to the negative pole of the generator and the negative pole of the actual vehicle battery;

[0037] PWM output is connected to the vehicle ECU;

[0038] The identifier also includes a protection circuit for chip protection, a filter circuit for stable communication, and a step-down circuit for adapting to 28V applications. It can be used on both 14V and 28V platforms, reducing customer misuse.

[0039] The design circuit is simple, the functions are complete, the applicability is strong, and the scalability is strong. It can be applied to a variety of usage environments and different working conditions. The identifier is powered by the positive pole of the actual vehicle battery, and the voltage is stepped down to the voltage range that the 5V power supply module can withstand through resistor R6, transistor Q2, and Zener diode ZD1. The 5V power supply module converts the external input voltage into 5V to power the main control chip. The filter module filters out the noise through the filter capacitor C3 to make the communication more stable. The output module outputs a stable 5V square wave with fixed frequency and duty cycle through the main control chip through resistor R1, resistor R2, transistor Q1, and resistor R3, so that the actual vehicle ECU can identify different generators.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A car generator identifier, comprising a 12 / 28V input module and a PWM output module, wherein the 12 / 28V input module is connected to the positive electrode of the generator and the positive electrode of the vehicle battery, and the PWM output module is connected to the vehicle ECU, characterized in that: The 12 / 28V input module is connected to the 28V step-down module; The 28V step-down module is connected to the 5V power supply module through the resistor R5; The 5V power supply module is connected to the filter module through the resistor R4; The filtering module is connected to the main control chip; The main control chip is connected to the PWM output module; The 5V power supply module is connected to the PWM output module.

2. The automotive generator identifier according to claim 1, characterized in that: The 28V step-down module is composed of resistor R6, resistor R7, transistor Q7, voltage stabilizing diode ZD1 and diode D1; The 12 / 28V input module is connected to the resistor R6, the resistor R6 is respectively connected to the resistor R7 and the transistor Q7, the transistor Q2 and the resistor R7 are connected to the voltage stabilizing diode ZD1, the transistor Q2 is connected to the diode D1, and the diode D1 is connected to the resistor R5.

3. The automotive generator identifier according to claim 2, characterized in that: The 5V power supply module is composed of capacitor C1, power supply IC2 and capacitor C2; The resistor R5 is connected to the capacitor C1 and pins 1 and 3 of the power IC2. The capacitor C1 is connected to pin 2 of the power IC2. Pins 2 and 5 of the power IC2 are connected to the capacitor C2. The capacitor C2 is electrically connected to the resistor R4 and VCC_5V.

4. The automotive generator identifier according to claim 3, characterized in that: The power supply IC2 model is ES5200.

5. The automotive generator identifier according to claim 3, characterized in that: The filter module is composed of a capacitor C3 and a TEST1 , the resistor R4 is connected to the capacitor C3 and the TEST1 , and the TEST1 is connected to the main control chip.

6. The automotive generator identifier according to claim 5, characterized in that: The main control chip model is KF8A100.

7. The automotive generator identifier according to claim 6, characterized in that: Pin 1 of the main control chip is connected to TEST1.

8. The automotive generator identifier according to claim 7, characterized in that: The PWM output module consists of resistor R2, resistor R1, transistor Q1, resistor R3, and TEST2 Pins 2 and 20 of the main control chip are connected to resistor R1, pin 18 of the main control chip is connected to TEST2, pin 16 of the main control chip is connected to TEST3, and TEST2 is connected to pin 5 of the power supply IC2; The resistor R1 is connected to the transistor Q1 and the resistor R2, the resistor R2 is connected to the transistor Q1, and the transistor Q1 is connected to the resistor R3 and PWM.