Huawei Technologies Co., Limited

Huawei Digital Power Technologies Co., Ltd.

Yong Cao

Pinghua Wang

Jianfeng Lv

Dong Chen

Wei Wei

Yanzhong Zhang

Mingyuan Zhang

Yangxing Li

Zhenlin Xie

Zhangrui Chen

Chengchen Liang

Patricia Leichliter

A battery protection apparatus power protection apparatus is configured to protect an electrochemical cell connected to a load, and includes a protection IC, a switching transistor group, and a sampling resistor. The protection IC includes two power input terminals respectively connected to positive and negative electrodes of the electrochemical cell, and an operational amplifier, where the operational amplifier includes a positive input pin, a negative input pin, and an output pin. The switching transistor group is connected between the negative electrode of the electrochemical cell and the load, and is configured to control turn-on and turn-off of a charge and discharge circuit of the electrochemical cell. The sampling detection resistor Rs is serially connected between the sampling circuit detection terminal and the output pin, where the main circuit detection terminal is connected to the positive input pin, and the sampling circuit detection terminal is connected to the negative input pin.

Power protection apparatus and terminal using the apparatus

Embodiments of this application provide a photovoltaic power conversion apparatus. The photovoltaic power conversion apparatus includes a first housing, a power component, at least one second housing, and at least one wiring terminal. The first housing forms a first accommodation cavity, and the power component is fixedly disposed in the first accommodation cavity. The at least one of the second housing forms a second accommodation cavity, and the at least one second housing is disposed outside a connection area of a first side wall of the first housing by using an installation wall. The wiring terminal sealingly penetrates through a part of the connection area of the first side wall, a first end of the wiring terminal is located in the first accommodation cavity, and a second end of the wiring terminal is located in the second accommodation cavity.

Photovoltaic power conversion apparatus

One example of a flexible battery includes an electrochemical cell layer and a wrapping layer that wraps the electrochemical cell layer. The flexible battery further includes an energy absorbing layer. The energy absorbing layer is located between the wrapping layer and upper and lower surfaces, which are opposite to each other, of the electrochemical cell layer. The energy absorbing layer includes a plurality of supporting parts that protrude outward from the upper or lower surface of the electrochemical cell layer. The plurality of supporting parts are mainly made of a foam material or rubber. For the energy absorbing layer, a lower-modulus buffering layer or an empty part may be further disposed between the electrochemical cell layer and the wrapping layer, to complement a wavy surface of the supporting part to form a flat surface, so as to meet diversified requirements of a wearable device.

Flexible battery and preparation method thereof

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Shenzhen, China

Yong Cao