Scheme development and design of vehicle charger
Time:2022-05-22
Views:2320
Car charger, referred to as car charger. It refers to the on-board charger routinely powered by automobile battery, which is widely used in the field of lithium battery charging of various portable and handheld devices. Such as: mobile phone, PDA, GPS, etc; The on-board charger should not only consider the actual demand of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of on-board battery (transient peak voltage, system switching noise interference, EMI, etc.); Therefore, the power management IC selected for the vehicle charging scheme must meet the switching power supply chip with high voltage resistance, high efficiency, high reliability and low frequency (conducive to EMI design).
1、 Scheme and principle of on-board charger
Some high-end car chargers generally include two USB interfaces, which can charge two digital products at the same time. Such products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection and four safety protection functions to ensure safe use. The on-board charger can be used in the vehicle as well as at home, realizing the multi-functional use of vehicle charging, direct charging and USB charging. Car charger is an accessory for charging digital products anytime and anywhere with car power supply, which can save you the cost of battery. These products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection and four safety protection functions to ensure your safe use.
2、 Advantages of vehicle charger scheme
2.1. Safety: the car charger has passed the testing of CCC, UL, FCC, CE and other international safety performance, and has a computer automatic protection chip, which can be used safely wherever you are, providing good protection for your equipment during charging. Car charging plug structure, built-in fuse, overvoltage current is too large, and the fuse will automatically blow to protect the safety of the machine. The car charger also has a USB interface, which supports various USB interface power output. It can charge mobile products such as mobile phones and tablets through the power output interface.
The more high-end vehicle charger with GPS positioning function can realize the functions of real-time tracking, historical track playback, parking point query, collision alarm, overspeed alarm and geographical fence alarm. It has a monitoring platform, which can be accessed through mobile phones and computers, and provides mobile app Download for convenient positioning. For young people who like to play microblogging and self driving, a "share" button is added on the mobile phone, You can choose the driving track for a period of time to share with your friends, which is very practical.
3、 Usage of on-board charger
3.1. On the vehicle cigarette lighter, insert the USB Car Charger and output the DC voltage through the standard USB interface.
4、 Precautions for use of on-board charger
Car chargers are also divided into direct charging and seat charging. You can choose to buy a seat charger, that is, remove the battery for charging, so as to avoid burning the mobile phone due to the unstable vehicle power supply and the sudden rise of voltage output peak. If you want to burn the battery, you can also burn the battery to reduce the loss. There are a variety of car chargers available on the market. If you choose online shopping, you must go to a regular website to buy.
In order to use the car charger safely, pay close attention to the following points:
1、 Scheme and principle of on-board charger
It uses the automobile cigarette lighter as the power socket to directly charge the mobile phone. Due to the low voltage provided by the vehicle, the on-board charger only needs an overload protection circuit. The front end of the on-board charger is designed with a safety tube. When the current exceeds the acceptable range of the overload protection circuit, the fuse will blow immediately to play a protective role. In addition to charging mobile facilities, the on-board charger also has GPS positioning function.
Some high-end car chargers generally include two USB interfaces, which can charge two digital products at the same time. Such products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection and four safety protection functions to ensure safe use. The on-board charger can be used in the vehicle as well as at home, realizing the multi-functional use of vehicle charging, direct charging and USB charging. Car charger is an accessory for charging digital products anytime and anywhere with car power supply, which can save you the cost of battery. These products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection and four safety protection functions to ensure your safe use.
2、 Advantages of vehicle charger scheme
With the development of automobile industry, vehicle charger is widely used, showing the characteristics of safety, versatility, fashion and so on.
2.1. Safety: the car charger has passed the testing of CCC, UL, FCC, CE and other international safety performance, and has a computer automatic protection chip, which can be used safely wherever you are, providing good protection for your equipment during charging. Car charging plug structure, built-in fuse, overvoltage current is too large, and the fuse will automatically blow to protect the safety of the machine. The car charger also has a USB interface, which supports various USB interface power output. It can charge mobile products such as mobile phones and tablets through the power output interface.
2.2. Versatility: the car charger is equipped with four AC replacement connectors of American regulation, British regulation, Austrian regulation and European regulation; The car charging, direct charging and USB charging are integrated to meet the charging under different conditions; Dual USB output interface, which can charge multiple electronic products.
2.3 . Fashion: for the high-end consumer group of car owners, the fashion of car charger is also valued by manufacturers. ABS material and piano paint baking process are generally used, which is not only fashionable and exquisite, but also has a very good feel.
The more high-end vehicle charger with GPS positioning function can realize the functions of real-time tracking, historical track playback, parking point query, collision alarm, overspeed alarm and geographical fence alarm. It has a monitoring platform, which can be accessed through mobile phones and computers, and provides mobile app Download for convenient positioning. For young people who like to play microblogging and self driving, a "share" button is added on the mobile phone, You can choose the driving track for a period of time to share with your friends, which is very practical.
3、 Usage of on-board charger
3.1. On the vehicle cigarette lighter, insert the USB Car Charger and output the DC voltage through the standard USB interface.
3.2. Electronic design parameters such as voltage and current fully comply with PDA mobile phone standards and will not cause damage to your beloved machine.
3.3. Connect the USB data cable to power and charge MP3 / MP4, mobile phone, small speaker, Bluetooth, PSP and other electronic products.
4、 Precautions for use of on-board charger
The car charger uses the car cigarette lighter as the power socket to directly charge the mobile phone. Due to the low voltage provided by the vehicle, the on-board charger only needs an overload protection circuit. The front end of the vehicle charger socket is designed with a safety tube. When the current exceeds the acceptable range of the overload protection circuit, the fuse will blow immediately to play a protective role. Note that the battery can only be charged when the engine is started.
Car chargers are also divided into direct charging and seat charging. You can choose to buy a seat charger, that is, remove the battery for charging, so as to avoid burning the mobile phone due to the unstable vehicle power supply and the sudden rise of voltage output peak. If you want to burn the battery, you can also burn the battery to reduce the loss. There are a variety of car chargers available on the market. If you choose online shopping, you must go to a regular website to buy.
In order to use the car charger safely, pay close attention to the following points:
4.1. The car charger should not be used under high temperature. Especially when the temperature in the car is too high in summer (generally more than 45 ℃), remember to unplug the car charger. In addition, try to avoid knocking, throwing and shaking the car charger at will during normal use, otherwise it is easy to damage the internal circuit board.
4. 2. Do not insert the vehicle charger before starting the vehicle engine, otherwise the voltage during starting may damage the vehicle charger.
4.3. Some strong cleaning agents and chemical products will cause serious corrosion damage to the vehicle filling, so be sure to pay attention when cleaning.
4.4. Remember to unplug the vehicle after the vehicle is turned off. Although the cigarette lighter of many vehicles will stop supplying power after removing the key, many cars still supply power continuously.
4.5. The vehicle charging shall also avoid water or be placed in a humid environment for a long time, otherwise the internal components are easy to be oxidized and corroded.
4.5. The vehicle charging shall also avoid water or be placed in a humid environment for a long time, otherwise the internal components are easy to be oxidized and corroded.
5、 Possible reasons for failure of on-board charger to charge
5.1. Unstable voltage during charging leads to failure of charging
5.2. The parameters of on-board charger do not meet the charging requirements
5.2. The parameters of on-board charger do not meet the charging requirements
Check the output voltage and current of the on-board charger and whether it supports its own digital products. Some parameters are inconsistent. For example, if a car with an output current of 1A charges a tablet computer, it will not be charged. This is caused by insufficient current. It is necessary to replace the high-power car charger.
5.3. Poor contact of on-board charger
The contact design of some on-board chargers is unreasonable, and there will be poor contact during driving, which leads to the discovery that it is not charged after reaching the destination.
5.4. The power supply of cigarette lighter itself is abnormal
If you replace multiple on-board chargers, mobile phones, etc., you can‘t normally use the car charger for charging in your car. At this time, you should check whether there is a problem with your car fuse.
5.5. Quality problem of charger
At present, there are many brands of on-board power supply on the market, with mixed products and large price gap. If you buy fake and shoddy products, you will not only be unable to charge the power, but also be likely to burn out car fuses and digital products, and even endanger personal safety. When buying a car charger, you must pay attention to buying a safe and secure car charger.
When charging, mobile phones or other intelligent electronic products will generally start the charging monitoring and detection program. If the program detects that the on-board impulse voltage is unstable, it is prohibited to impulse. It is recommended that the USB system will not be flushed when there is a program to flush the seat or the computer.
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