Truck starting ignition device

Abstract

The utility model belongs to the technical field of circuit protection, and relates to a truck starting ignition device which comprises a shunt R1, a current detection module, a discharging MOS module, a current-limiting charging module, a charging MOS module, an AFE control chip, an MCU control chip, a battery anode and cathode output module and a plug-in capacitor module. Wherein the AFE control chip is connected with a battery cell positive electrode, the current detection module, the discharging MOS module, the charging MOS module and the MCU control chip, the current detection module is further connected with the shunt, the discharging MOS module is further connected with the shunt, the charging MOS module and the current-limiting charging module, the current-limiting charging module is further connected with the battery positive and negative electrode output module, and the MCU control chip is further connected with the battery positive and negative electrode output module. And the battery positive and negative electrode output module is also connected with the external capacitor module. The current-limiting charging part and the externally-hung large capacitor part are added, and the current-limiting part can limit the charging current when the voltage of the battery cell is high, so that the effect of protecting the battery cell is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, and more specifically to a truck starting and ignition device. Background Art

[0002] The existing truck starting batteries are all lead-acid batteries for starting and parking. The service life of lead-acid batteries is not long enough, and they are large and heavy. In particular, when the driver uses the parking function when parking, the battery will run out of power, resulting in the car not being able to start, which will reduce the service life of the lead-acid batteries. Now we need to switch to lithium batteries for starting and ignition, and the current required for car starting and ignition is about 2000A. The voltage cannot be too high. If the lithium battery pack is fully charged and the engine on the car is still generating electricity for the car, the control display on the car will alarm and the lights will flash, making the car unsafe to drive. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing truck starting batteries are all lead-acid batteries used for starting and parking, which have insufficient service life, large size and heavy weight. In view of the above-mentioned defects of the prior art, a truck starting ignition device is provided, comprising:

[0004] Shunt R1, current detection module, discharge MOS module, current limiting charging module, charging MOS module, AFE control chip, MCU control chip, battery positive and negative electrode output module, external capacitor module; wherein the AFE control chip is respectively connected to the positive electrode of the battery cell, the current detection module, the discharge MOS module, the charging MOS module, and the MCU control chip, the current detection module is also connected to the shunt, the discharge MOS module is also respectively connected to the shunt, the charging MOS module, and the current limiting charging module, the current limiting charging module is also connected to the battery positive and negative electrode output modules, and the battery positive and negative electrode output modules are also connected to the external capacitor module.

[0005] Preferably, the current detection module includes: one end of the resistor R36 is respectively connected to the negative electrode of the battery cell and the pin P-4 of the shunt R1, the other end of the resistor R36 is connected to the pin P62 of the AFE control chip, one end of the resistor R23 is connected to the pin P-5 of the shunt R1, and the other end of the resistor R23 is connected to the pin P61 of the AFE control chip.

[0006] Preferably, the discharge MOS module includes: the emitter of the transistor Q1 is respectively connected to one end of the resistor R36 and one end of the resistor R7, the collector of the transistor Q1 is connected to the positive electrode of the diode D1, the base of the transistor Q1 is respectively connected to the other end of the resistor R7 and one end of the resistor R166, the collector of the transistor Q2 is connected to the other end of the resistor R166, the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is respectively connected to one end of the resistor R41 and one end of the resistor R4, the cathode of the diode D1 is respectively connected to one end of the resistor R144 and one end of the resistor R191, the other end of the resistor R191 is connected to the drain of MOS1, and the other end of the resistor R144 is connected to the gate of MOS1.

[0007] Preferably, the current limiting charging module includes: the drain of MOS3 is connected to one end of resistor R2, the gate of MOS3 is connected to one end of resistor R12, the other end of resistor R12 is connected to the cathode of diode D3, and the anode of diode D3 is connected to one end of resistor R6.

[0008] Preferably, the charging MOS module includes: the drain of MOS2 is connected to one end of the resistor R64, the gate of MOS2 is connected to one end of the resistor R80, the other end of the resistor R80 is connected to the cathode of the diode D34, the anode of the diode D34 is respectively connected to the cathode of the diode D35 and the other end of the resistor R64, the anode of the diode D35 is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is respectively connected to one end of the resistor R306 and one end of the resistor R307, the base of the transistor Q3 is respectively connected to the other end of the resistor R307 and one end of the resistor R308, the other end of the resistor R308 is connected to the collector of the transistor Q4, the base of the transistor Q4 is respectively connected to one end of the resistor R33, one end of the capacitor C13, and one end of the resistor R309, and the emitter of the transistor Q4 is respectively connected to the other end of the resistor R33 and the other end of the capacitor C13 and grounded.

[0009] Preferably, the AFE control chip includes: any one of BQ76942, BQ769142 and BQ76952.

[0010] Preferably, the MCU control chip includes: any one of STM32 series, AVR series, PIC series and MSP430 series.

[0011] Preferably, the external capacitor module includes: the positive electrode of the diode D4 is connected to the collector of the transistor Q5, the emitter of the transistor Q5 is respectively connected to one end of the resistor R10 and one end of the resistor R9, the base of the transistor Q5 is respectively connected to the other end of the resistor R9 and one end of the resistor R11, the other end of the resistor R11 is connected to the collector of the transistor Q6, the base of the transistor Q6 is respectively connected to one end of the resistor R8, one end of the capacitor C1, and one end of the resistor R3, and the emitter of the transistor Q6 is respectively connected to the other end of the resistor R8 and the other end of the capacitor C1 and is grounded.

[0012] Preferably, the AFE control chip is BQ76942.

[0013] Preferably, the MCU control chip is STM32F103RCT6.

[0014] The implementation of the truck starting ignition device of the utility model has the following beneficial effects: compared with the prior art, the present embodiment adds a current limiting charging part and an external large capacitor part, and the current limiting part can limit the current charging current when the battery cell is at a high voltage, thereby protecting the battery cell; when the battery cell reaches a set voltage, the current limiting current is used to charge the battery cell, and combined with the balancing effect, the charging voltage of each string of battery cells is made more consistent; the external capacitor plays a role in filtering and energy storage, which increases the time for the truck to amplify the current when starting, and the capacitor can discharge together with the battery cell at the same time, reducing the damage to the battery cell caused by large current discharge, thereby ensuring the stability and sustainability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. The utility model will be further described below in combination with the drawings and embodiments. In the drawings:

[0016] Figure 1 This is a schematic diagram of the composition framework of the truck starting and ignition device of the utility model;

[0017] Figure 2 It is a schematic diagram of a preferred embodiment of the truck starting and ignition device of the utility model.

[0018] In the figure, 10-shunt, 11-current detection module, 12-discharge MOS module, 13-current limiting charging module, 14-charging MOS module, 15-AFE control chip, 16-MCU control chip, 17-battery positive and negative output module, 18-external capacitor module. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0022] See also Figure 1 , is a schematic diagram of the structure of the truck starting and ignition device of the utility model. Figure 1 As shown, in the truck starting ignition device provided in the first embodiment of the utility model, at least a shunt 10R1, a current detection module 11, a discharge MOS module 12, a current limiting charging module 13, a charging MOS module 14, an AFE control chip 15, an MCU control chip 16, a battery positive and negative electrode output module 17, and an external capacitor module 18 are included; wherein the AFE control chip 15 is respectively connected to the positive electrode of the battery cell, the current detection module 11, the discharge MOS module 12, the charging MOS module 14, and the MCU control chip 16, the current detection module 11 is also connected to the shunt 10, the discharge MOS module 12 is also respectively connected to the shunt 10, the charging MOS module 14, and the current limiting charging module 13, the current limiting charging module 13 is also connected to the battery positive and negative electrode output module 17, and the battery positive and negative electrode output module 17 is also connected to the external capacitor module 18.

[0023] The current detection module 11 is used for current collection. When the charging current passes through the shunt 10, a voltage drop will be generated at both ends. The working state of the current detection module 11 is that when the current flows through the shunt 10 and generates a voltage drop, the voltage at both ends will be detected and sent to the AFE control chip 15 for corresponding control. When the battery voltage reaches the set charging voltage, the MCU control chip 16 will first turn on the current limiting charging module 13, then control the main charging module, turn off the charging MOS tube, and the on-board charger will charge the battery cell through the current limiting charging module 13. In addition, the filtering and energy storage of the external capacitor module 18 make the output voltage of the charger stable and all the equipment on the vehicle work normally.

[0024] Figure 2 This is a schematic diagram of a preferred embodiment of the truck starting and ignition device of the utility model. Figure 2 As shown, the current detection module 11 includes: one end of the resistor R36 is connected to the negative electrode of the battery cell and the pin P-4 of the shunt 10R1 respectively, the other end of the resistor R36 is connected to the pin P62 of the AFE control chip 15, one end of the resistor R23 is connected to the pin P-5 of the shunt 10R1, and the other end of the resistor R23 is connected to the pin P61 of the AFE control chip 15.

[0025] The discharge MOS module 12 includes: the emitter of the transistor Q1 is respectively connected to one end of the resistor R36 and one end of the resistor R7, the collector of the transistor Q1 is connected to the positive electrode of the diode D1, the base of the transistor Q1 is respectively connected to the other end of the resistor R7 and one end of the resistor R166, the collector of the transistor Q2 is connected to the other end of the resistor R166, the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is respectively connected to one end of the resistor R41 and one end of the resistor R4, the cathode of the diode D1 is respectively connected to one end of the resistor R144 and one end of the resistor R191, the other end of the resistor R191 is connected to the drain of MOS1, and the other end of the resistor R144 is connected to the gate of MOS1.

[0026] The current limiting charging module 13 includes: the drain of MOS3 is connected to one end of the resistor R2, the gate of MOS3 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to one end of the resistor R6.

[0027] The charging MOS module 14 includes: a drain of MOS2 is connected to one end of a resistor R64, a gate of MOS2 is connected to one end of a resistor R80, the other end of the resistor R80 is connected to the cathode of a diode D34, the anode of the diode D34 is respectively connected to the cathode of a diode D35 and the other end of the resistor R64, the anode of the diode D35 is connected to the collector of a transistor Q3, the emitter of the transistor Q3 is respectively connected to one end of a resistor R306 and one end of a resistor R307, the base of the transistor Q3 is respectively connected to the other end of the resistor R307 and one end of a resistor R308, the other end of the resistor R308 is connected to the collector of a transistor Q4, the base of the transistor Q4 is respectively connected to one end of a resistor R33, one end of a capacitor C13, and one end of a resistor R309, the emitter of the transistor Q4 is respectively connected to the other end of the resistor R33 and the other end of the capacitor C13 and is grounded.

[0028] The charging control principle is: when the truck starts charging, under normal circumstances, the charging and discharging MOS tubes are turned on. High current charging will cause overcurrent through the charging and discharging circuits. If the high current is charged for too long, the battery will be fully protected. When the AFE detects the set voltage, it will first turn on the current limiting charging part and then close the main charging circuit. At this time, part of the current output by the charger will pass through the current limiting charging part to the battery cell, and another part will be charged to the large capacitor part. Make the charger output a stable normal working voltage. Different charger output power. Adjust the size of the current limiting part and the capacity of the large capacitor to match the charger.

[0029] AFE control chip, full name Analog Front End (AFE) control chip, is an indispensable key component in modern electronic devices. It is mainly responsible for processing analog signals from analog signal sources such as sensors, and converting these signals into digital signals for further processing by digital signal processors.

[0030] In specific implementation, the AFE control chip 15 includes but is not limited to any one of BQ76942, BQ769142 and BQ76952. In this embodiment, the AFE control chip 15 is selected as BQ76942. These chips can handle battery pack applications from 3 cells to 16 cells in series, and have a pin-to-pin design, which facilitates component changes to adapt to different battery cell applications.

[0031] The working principle of the AFE control chip 15 can be summarized in the following steps. First, it converts the analog signal collected by the sensor into a digital signal through a built-in analog-to-digital converter (ADC). This conversion process is crucial for electronic devices because digital signals are easier to process and transmit. Next, the AFE control chip amplifies, filters, modulates, and processes the digital signal to ensure the accuracy and stability of the signal. These processing steps help eliminate noise and interference and improve the quality of the signal.

[0032] In addition to the signal processing function, the AFE control chip also has an intelligent control function. It can adjust the control parameters according to real-time data to achieve precise control of the production process. This intelligent control function enables the AFE control chip to adapt to various complex environments and usage scenarios and meet the needs of different equipment.

[0033] AFE control chip, namely analog front end (Ana l og Front End) chip, is a key electronic component, which is mainly responsible for processing analog signals provided by analog signal sources such as sensors, and then converting them into digital signals for subsequent digital signal processing systems. In this process, AFE chip usually integrates multiple functions such as ADC (analog-to-digital converter), amplifier, reference source, excitation circuit, modulation and demodulation circuit, so it has high integration and powerful functions.

[0034] MCU control chip, i.e. microcontroller, is the core of embedded system. When specifically implemented, MCU control chip 16 includes but is not limited to any one of STM32 series, AVR series, PIC series and MSP430 series. In the present embodiment, MCU control chip 16 is selected as STM32F103RCT6, and can also be STM32F103CBT6 and STM32F030C8T6, etc. These MCU control chips are widely used in many fields with their high performance, low power consumption and easy development characteristics.

[0035] The working principle of MCU can be summarized into several core steps. First, the clock circuit inside the MCU will periodically provide a stable clock signal to drive the various functions of the MCU. When the MCU receives an external input command signal, its internal controller will parse and decode these instructions. Then, the MCU will read the corresponding data and program from the internal program memory (ROM) and data memory (RAM) according to the requirements of the instructions. Then, the MCU will process the read data according to the requirements in the instructions, including calculations, logical judgments, bit operations, etc. Finally, the MCU exchanges data with external devices through the input and output interfaces to achieve connectivity with the outside world.

[0036] The external capacitor module 18 includes: the positive electrode of the diode D4 is connected to the collector of the transistor Q5, the emitter of the transistor Q5 is respectively connected to one end of the resistor R10 and one end of the resistor R9, the base of the transistor Q5 is respectively connected to the other end of the resistor R9 and one end of the resistor R11, the other end of the resistor R11 is connected to the collector of the transistor Q6, the base of the transistor Q6 is respectively connected to one end of the resistor R8, one end of the capacitor C1, and one end of the resistor R3, and the emitter of the transistor Q6 is respectively connected to the other end of the resistor R8 and the other end of the capacitor C1 and grounded. The external capacitor module 18 is used for filtering and energy storage.

[0037] Through the design of the above embodiments, the utility model has the following beneficial effects: compared with the prior art, the present embodiment adds a current limiting charging part and an external large capacitor part, and the current limiting part can limit the current charging current when the battery cell has a high voltage, thereby protecting the battery cell; when the battery cell reaches a set voltage, the current limiting current is used to charge the battery cell, and combined with the balancing effect, the charging voltage of each string of battery cells is made more consistent; the external capacitor plays the role of filtering and energy storage, which increases the time for the truck to amplify the current when starting, and the capacitor can discharge together with the battery cell at the same time, reducing the damage to the battery cell caused by large current discharge, thereby ensuring the stability and sustainability of the product.

[0038] The present invention is described according to specific embodiments, but those skilled in the art should understand that various changes and equivalent substitutions can be made without departing from the scope of the present invention. In addition, in order to adapt to specific occasions of the present invention technology, many modifications can be made to the present invention without departing from its protection scope. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments that fall within the scope of protection of the claims.

Claims

1. A truck starting ignition device, characterized in that: include: Shunt R1, current detection module, discharge MOS module, current limiting charging module, charging MOS module, AFE control chip, MCU control chip, battery positive and negative electrode output module, external capacitor module; wherein the AFE control chip is respectively connected to the positive electrode of the battery cell, the current detection module, the discharge MOS module, the charging MOS module, and the MCU control chip, the current detection module is also connected to the shunt, the discharge MOS module is also respectively connected to the shunt, the charging MOS module, and the current limiting charging module, the current limiting charging module is also connected to the battery positive and negative electrode output modules, and the battery positive and negative electrode output modules are also connected to the external capacitor module.

2. The truck starting ignition device according to claim 1, characterized in that: The current detection module includes: one end of the resistor R36 is connected to the negative electrode of the battery cell and the pin P-4 of the shunt R1 respectively, the other end of the resistor R36 is connected to the pin P62 of the AFE control chip, one end of the resistor R23 is connected to the pin P-5 of the shunt R1, and the other end of the resistor R23 is connected to the pin P61 of the AFE control chip.

3. The truck starting ignition device according to claim 1, characterized in that: The discharge MOS module includes: the emitter of the transistor Q1 is respectively connected to one end of the resistor R36 and one end of the resistor R7, the collector of the transistor Q1 is connected to the positive electrode of the diode D1, the base of the transistor Q1 is respectively connected to the other end of the resistor R7 and one end of the resistor R166, the collector of the transistor Q2 is connected to the other end of the resistor R166, the emitter of the transistor Q2 is grounded, the base of the transistor Q2 is respectively connected to one end of the resistor R41 and one end of the resistor R4, the cathode of the diode D1 is respectively connected to one end of the resistor R144 and one end of the resistor R191, the other end of the resistor R191 is connected to the drain of MOS1, and the other end of the resistor R144 is connected to the gate of MOS1.

4. The truck starting ignition device according to claim 1, characterized in that: The current limiting charging module includes: the drain of MOS3 is connected to one end of the resistor R2, the gate of MOS3 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the cathode of the diode D3, and the anode of the diode D3 is connected to one end of the resistor R6.

5. The truck starting ignition device according to claim 1, characterized in that: The charging MOS module includes: the drain of MOS2 is connected to one end of the resistor R64, the gate of MOS2 is connected to one end of the resistor R80, the other end of the resistor R80 is connected to the cathode of the diode D34, the anode of the diode D34 is respectively connected to the cathode of the diode D35 and the other end of the resistor R64, the anode of the diode D35 is connected to the collector of the transistor Q3, the emitter of the transistor Q3 is respectively connected to one end of the resistor R306 and one end of the resistor R307, the base of the transistor Q3 is respectively connected to the other end of the resistor R307 and one end of the resistor R308, the other end of the resistor R308 is connected to the collector of the transistor Q4, the base of the transistor Q4 is respectively connected to one end of the resistor R33, one end of the capacitor C13, and one end of the resistor R309, and the emitter of the transistor Q4 is respectively connected to the other end of the resistor R33 and the other end of the capacitor C13 and grounded.

6. The truck starting ignition device according to claim 1, characterized in that: The AFE control chip includes any one of BQ76942, BQ769142 and BQ76952.

7. The truck starting ignition device according to claim 1, characterized in that: The MCU control chip includes: any one of STM32 series, AVR series, PIC series and MSP430 series.

8. The truck starting ignition device according to claim 1, characterized in that: The external capacitor module includes: the positive electrode of the diode D4 is connected to the collector of the transistor Q5, the emitter of the transistor Q5 is respectively connected to one end of the resistor R10 and one end of the resistor R9, the base of the transistor Q5 is respectively connected to the other end of the resistor R9 and one end of the resistor R11, the other end of the resistor R11 is connected to the collector of the transistor Q6, the base of the transistor Q6 is respectively connected to one end of the resistor R8, one end of the capacitor C1, and one end of the resistor R3, and the emitter of the transistor Q6 is respectively connected to the other end of the resistor R8 and the other end of the capacitor C1 and is grounded.

9. The truck starting ignition device according to claim 6, characterized in that: The AFE control chip is BQ76942.

10. The truck starting ignition device according to claim 7, characterized in that: The MCU control chip is STM32F103RCT6.

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