Wireless charging technology in portable energy storage devices

Wireless charging technology in portable energy storage equipment is a technology that transmits electric energy to the device through wireless means, which can provide a convenient and fast charging method for portable electronic equipment. Wireless charging technology is mainly based on electromagnetic induction, magnetic resonance, radio frequency and other principles, among which electromagnetic induction principle is widely used in portable energy storage equipment wireless charging technology.

The principle of electromagnetic induction is to generate electromotive force in the conductor through the changing magnetic field, to achieve the transmission of electrical energy. The wireless charging module in the portable energy storage device is usually composed of two parts: the transmitting end and the receiving end. The transmitting end is installed in a charger or energy storage device, which generates a changing magnetic field through the principle of electromagnetic induction to transmit electrical energy to the receiving end. The receiving end is installed in the device that needs to be charged, and it receives the electrical energy from the transmitting end and converts it into the electrical energy required by the device through the principle of electromagnetic induction for the normal operation of the device.

At present, there are two main wireless charging technologies commonly used, one is electromagnetic induction wireless charging, which is also the most common wireless charging method, using Faraday electromagnetic induction principle. In portable energy storage devices, there is an emission coil (usually integrated inside the energy storage device), and when the current passes through this coil, a changing magnetic field is created. There is also a receiving coil on the back of the receiving device. When this receiving coil is near the transmitting coil, the changing magnetic field induces an electromotive force in the receiving coil, which in turn generates an electric current that charges the device's battery.

The other is magnetic resonance technology, which is more advanced, allowing charging over larger distances and more flexible position relationships. This technique is also based on electromagnetic induction, but adds the concept of resonance. In the system, both the transmitter and receiver are tuned to the same resonant frequency. When the transmitting coil oscillates at a specific frequency, it not only senses current directly in the neighboring coil, but can also transmit energy via magnetic field resonance in the air to a distant receiving coil tuned to the same frequency.

This method can achieve wireless charging over a longer distance, while reducing the requirement for accurate alignment of charging locations, and is suitable for portable energy storage devices to provide a more flexible charging experience for multiple devices in the surrounding environment.

When choosing a wireless charging chip, there are several key factors to consider:

1, compatibility: The wireless charging chip must be compatible with the charging needs of the target device, including power levels, charging protocols, etc. For portable energy storage devices, the more types and numbers of charging devices are supported, the stronger its applicability.

2, efficiency: there will be energy loss in the process of wireless charging, choosing a high-efficiency wireless charging chip can reduce this loss, improve the charging speed and the battery life of the device.

3, heat dissipation performance: wireless charging process will generate heat, if poor heat dissipation, may lead to EP910LC-35 chip overheating, affecting performance and life. Therefore, it is necessary to choose a wireless charging chip with a good heat dissipation design.

4, size and cost: For portable energy storage equipment, space and cost are important considerations. Choosing a smaller, lower-cost wireless charging chip can make the device lighter and easier to carry.

At present, the common wireless charging chip suppliers in the market include Qualcomm (Qualcomm), NXP (NXP), Broadcom (Broadcom), etc. These companies offer a variety of models of wireless charging chips that can meet different application needs. For example, Qualcomm provides Porto-branded wireless charging solutions, including multiple models of transmitter and receiver chips; NXP offers high-efficiency and compact wireless charging solutions for mobile phones, wearables and other applications.

When selecting a specific wireless charging chip, it is also necessary to conduct detailed evaluation and testing according to the actual needs and design requirements of portable energy storage devices. This includes determining the charging power and efficiency requirements of the device, selecting the appropriate coil material and design, optimizing the charging control algorithm, and so on. By comprehensively weighing various factors, you can choose the most suitable wireless charging chip scheme for your products.

In short, wireless charging technology in portable energy storage devices has brought great convenience to people's lives. When choosing a wireless charging chip, it is necessary to consider factors such as compatibility, efficiency, heat dissipation performance, size and cost to ensure that you choose the most suitable solution for your product. With the continuous development of technology and the reduction of costs, it is believed that more portable devices will adopt wireless charging technology in the future.