Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Fupeng Cai

Zhimin Dan

Wei Zhang

Yizhen Hou

Fuming Ye

Changjian Liu

Qiandeng Li

Fangjie Zhou

Zhiwei Yan

Liansong Wang

Lidan Yan

Xin He

Embodiments of this application relate to the field of circuit technologies. A wake-up circuit and a rechargeable device are disclosed. The wake-up circuit includes an input control module, a drive module, and an output control module. The input control module, the drive module, and the output control module each are connected to an auxiliary power supply. The input control module is configured to output a first level signal when an external voltage signal is received. The drive module is configured to, when the first level signal is received, output a second level signal that lasts for a first preset time. The output control module is configured to, when the second level signal is received, output a wake-up signal that lasts for the first preset time to a battery management system. According to this application, the wake-up circuit and the BMS consume less power of the auxiliary power supply.

Wake-up circuit and rechargeable device

The present application discloses a wake-up method and wake-up system for a battery management system. The method may include converting, by a conversion unit, a low-voltage power signal detected at a low-voltage input port into a high-voltage wake-up signal, and receiving, by a high-voltage control module, a working voltage provided by a power battery pack under control of the high-voltage wake-up signal; controlling, by the high-voltage control module, the high-voltage transmission module to be turned on, providing the working voltage to a synchronous rectifying module by the turned-on high-voltage transmission module, and converting high-voltage electric energy provided by the power battery pack into low-voltage electric energy; and transmitting, under control of the synchronous rectifying module, the low-voltage electric energy to the low-voltage controller, and waking up the battery management system by the low-voltage controller.

Wake-up method and wake-up system for battery management system

A battery pack management system includes a controller, an isolation unit, a plurality of battery pack management units, and a plurality of battery packs. The plurality of battery pack management units are connected in series by a first daisy chain, and the plurality of battery pack management units are also connected in series by a second daisy chain. The first daisy chain transmits sampled data that is collected by the battery pack management units from corresponding battery packs and transmits control instructions of the controller. The second daisy chain transmits a failure prompt signal which is generated by a battery pack management unit that detects a failure. A first battery pack management unit and a last battery pack management unit of the plurality of battery pack management units connected in series are connected to the controller through the isolation unit.

Battery pack management system and control method thereof

A method and apparatus for detecting a circuit malfunction. The method includes: receiving a detection instruction and controlling a plurality of equalization modules to be turned off in response to the detection instruction; collecting first sampled data of sampled equalization modules; controlling odd numbered equalization modules among the sampled equalization modules to be turned on and even numbered equalization modules among the sampled equalization modules to be turned off; collecting second sampled data of the sampled equalization modules; controlling the odd numbered equalization modules among the sampled equalization modules to be turned off and the even numbered equalization modules among the sampled equalization modules to be turned on; collecting third sampled data of the sampled equalization modules: and determining, according to the first sampled data, second sampled data and third sampled data, a malfunction in a sampling detection circuit and locating the malfunction.

Sampling detection circuit and method for detecting a circuit malfunction

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Ningde, China

Fupeng Cai