On-board wireless charging

Wireless charger

Inductive charging (called wireless charging or cordless rechargeable) by using electromagnetic field by electromagnetic coupling energy transmission between two objects. Energy through a induction coupling is sent to a electrical equipment, which applies energy to recharge the battery or run with the improvement of user requirements for charging convenience, vehicle-mounted mobile wireless charging technology rapid development, technical maturity is higher, more extensive application area. Along with the large-scale application in the car, to avoid the drivers head looking for jack, tell the interface and the behavior of the charging line, improve the security of driving. On the function design and car interior is an organic whole, beautiful and practical.

According to monitoring data show that high intelligent vehicle research institute China market in 2021 (not including the import and export) new front passenger car standard carry on mobile phone wireless charging module function insurance amount to 3.5835 million vehicles, up 120.43% from a year earlier, front loading carrying rate was 17.57%. In 2022 is expected to pick up rate was 25%

On-board wireless charging control chip will be involved in the design, magnetic coil, sensor, power management, etc. Several modules. When choosing wireless charging modules need to focus on the charging efficiency, security and compatibility.

Charging efficiency: if the charging efficiency is low, will affect the use of the user experience. As a result, developers need to focus on the charger power, transmission distance, transmission efficiency and heat loss, in order to improve charging efficiency.

Security: the need to take into account the battery overheat, short circuit and overcharge problem, in order to ensure the safety of the product. Also need to consider the problem such as electromagnetic radiation, to avoid the bad effects.

Compatibility: the need to consider the needs of equipment for charging and charging ways, with different brands, different models of mobile phones and other devices.

At present the mainstream of the on-board wireless charging scheme is given priority to with below 15 w solution. This article will be below 15 w system solutions, for example detail the model selection of the power management chip.