Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Co., Limted

Contemporary Amperex Technology (hong Kong) Limited

Contemporarv Amperex Technologv Co., Limited

Contemporary Amperex Technology Limited

Yizhen Hou

Zhimin Dan

Wei Zhang

Jia Xu

Jiechao Luo

Teng Yu

Xiyang Zuo

Wenbin Lu

Xingyuan Wu

Taosheng Zhu

Meng Li

Zhanyu Sun

Jinbo Cai

Xiong Zheng

Xinwei Chen

Weiping Sun

Shichao Li

Yanhua Lu

Jian Ruan

Guowei Li

Xiao Wang

Chao Zeng

Yanru Li

Guoliang Hu

Yu Yan

Fangjie Zhou

Lidan Yan

Liansong Wang

Yiqi Liang

Qiandeng Li

Zhanliang Li

Mingshu Du

Jinfeng Gao

Le Chu

Changjian Liu

Chengyong Liu

Yuanmiao Zhao

Qidong Lou

Fupeng Cai

Xian Huang

Delong Shi

Meilin Chen

Da Xie

Xiyang Zou

A thermal management method includes obtaining a predicted temperature including a predicted value of an operating temperature of a target device, and controlling the target device to switch a thermal management according to the predicted temperature mode. The thermal management mode is used to adjust the operating temperature of the target device.

Thermal management method and system, domain control unit and storage medium

An electric vehicle control system and a control method, an electric vehicle power-on method, an electric vehicle power-off method, and an electric vehicle charging method are disclosed in this application. The control system includes a domain control unit controlling an electric vehicle, a current sampling unit sampling the current of a power battery and a motor of the electric vehicle and sending sampling signals to the domain control unit, and electrical device, driven by the power battery, sampling the current flowing through it and sending the sampling signals to the domain control unit. The domain control unit, according to the sampling signals sent by the electrical device and the current sampling unit, manages the power battery and controls a motor driver module and the electrical device. The structure of the control system and the control policy are simplified and the power-on and power-off time is shortened.

Electric vehicle control system, control method, and computer-readable storage medium

A battery heating system includes a voltage conversion unit configured to be electrically connected to a power source and to a battery to be heated, and a control unit. The voltage conversion unit receives a first voltage input by the power source or a second voltage input by the battery to be heated. The control unit acquires a charging and discharging frequency of the voltage conversion unit, determines a charge transfer impedance of the battery to be heated according to the charging and discharging frequency, calculates a safe amplitude current of the battery to be heated according to the charge transfer impedance, and sends a control signal to the voltage conversion unit according to the charging and discharging frequency and the safe amplitude current to cause the voltage conversion unit to perform boost or buck processing of the first voltage or the second voltage according to the control signal.

Battery heating system and method, power supply system, and electrical apparatus

This application provides a method, an apparatus, a system for detecting battery thermal runaway, and a battery management unit. The method includes: obtaining an output signal of an air pressure sensor located in a battery pack, and obtaining parameter information of the battery pack; determining state information of the air pressure sensor based on the output signal of the air pressure sensor; and generating an alarm signal indicating occurrence of thermal runaway in the battery pack based on the state information of the air pressure sensor and the parameter information of the battery pack. In this application, the thermal runaway detection for the battery pack may be implemented by considering parameter information of both the air pressure sensor and the battery pack, improving the reliability of the thermal runaway detection for the battery pack, reducing the probability of false positives and false negatives, and improving driving safety.

Method, apparatus, system for detecting battery thermal runaway, and battery management unit

Embodiments of the present invention relate to the field of circuit technology, and disclose a method for correcting a SOC of a battery pack, a battery management system, and a vehicle. The method for correcting an SOC of a battery includes: determining, when a charging process of the battery pack starts, whether an initial SOC value of the battery pack is less than or equal to a preset electricity quantity threshold; when the initial SOC value of the battery pack is less than or equal to the preset electricity quantity threshold, recording state information of the battery pack during the charging process, and generating a differential capacity curve of the battery pack according to the state information; correcting a current SOC value of the battery pack according to the differential capacity curve and a voltage-SOC reference curve of a non-decay zone of the battery pack.

Method for correcting SOC of battery pack, battery management system and vehicle

This application discloses a protection circuit associated with a battery management system (BMS). The protection circuit includes a first protection module and a freewheeling module. The first protection module is connected in parallel to a first switch module of the BMS, and the freewheeling module is connected in parallel to a load module of the BMS. The first protection module switches to a charging state when the first switch module is turned off to stabilize a voltage between a first terminal of the first switch module and a second terminal of the first switch module. The freewheeling module is turned on when the first switch module is turned off to stabilize a voltage between the first switch module and the second switch module. The protection circuit mitigates risks of breakdown of the first switch module, and prevents a parasitic inductance from limiting a switching frequency of the first switch module.

Protection circuit and battery management system

A heating system includes first and second input ends, first and second battery modules, first switch and second switches, and a control unit. The first switch is connected between first terminals of the first and second battery modules. Second terminals of the first and second battery modules are connected to each other. The second switch is connected between the first input end and the first terminal of the second battery module. The second input end is connected to the first terminal of the first battery module. The first terminals of the first and second battery modules have a same polarity, and the second terminals of the first and second battery modules have a same polarity. The control unit is connected to the first and second switches, and configured to control the first and second switches to be turned on or off.

Heating system, heating method and apparatus, and electric device

A battery pack system, a control method thereof and a management device are provided. A battery pack is connected in series with a discharge circuit unit and a charge circuit unit; a battery management unit is to monitor a temperature of the battery pack, to periodically send, when the temperature of the battery pack is lower than a threshold, a turn-on-instruction to the discharge circuit unit and the charge circuit unit alternately to control the discharge circuit unit and the charge circuit unit to be alternately turned on in heating cycles; the discharge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the battery pack to flow into the energy storage unit in discharging-phase; and the charge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the energy storage unit to flow into the battery pack in charging-phase.

Battery pack system, control method thereof and management device

The present application provides a charge and discharge circuit, and relates to the field of battery power. The charge and discharge circuit comprises: a charge circuit comprising a battery pack, a first switch set and a charging device connected in series; and a discharge circuit comprising the battery pack, a second switch set and an electrical device connected in series; both the first switch set and the second switch set comprise at least one switch, and the at least one switch in the first and/or second switch set is a semiconductor switch.

Charge and discharge circuit

Embodiments of the present application provide a detection apparatus of electrochemical impedance spectroscopy and a battery management system, the detection apparatus including a waveform generator, where the waveform generator is integrated in a battery monitoring chip; an excitation resistor; a detection resistor; and an MOS switch, wherein the waveform generator is configured to generate a pulse waveform, a gate electrode of the MOS switch is configured to receive the pulse waveform; the excitation resistor is configured to enable the battery to generate an excitation current when the gate electrode of the MOS switch receives the pulse waveform; the detection resistor is configured to convert the excitation current into an excitation voltage, the excitation voltage is configured to calculate an electrochemical impedance of the battery, The detection apparatus of electrochemical impedance spectroscopy in embodiments of the present application can lower cost and volume of EIS detection.

Detection apparatus of electrochemical impedance spectroscopy and battery management system

The present disclosure provides a battery management system, and a method and apparatus for transmitting information. The method includes: determining, from a plurality of slave nodes, a fault slave node that communicates abnormally with a master node in the battery management system; selecting a target slave node from the plurality of slave nodes, wherein the target slave node is a slave node that communicates normally with both the master node and the fault slave node; transmitting frequency conversion information to the target slave node, so that the target slave node forwards the frequency conversion information to the fault slave node, and the fault slave node performs a frequency conversion based on the frequency conversion information; and transmitting information with the fault slave node using a frequency after the frequency conversion. According to embodiments of the present disclosure, the reliability of wireless communication in the battery management system can be improved.

Battery management system, and method and apparatus for transmitting information

The present application provides an electric protection circuit, which relates to the field of battery power. The electric protection circuit includes a battery pack, a main positive switch, a load device and a main negative switch connected in series. The main positive switch and/or the main negative switch include at least one semiconductor switch. The main positive switch and/or the main negative switch in the electric protection circuit are connected in parallel to a protection module, which absorbs electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off. The technical solution of the present application can improve the safety of the electric protection circuit.

Electric protection circuit

The present application discloses a charging method, an apparatus, a device, a medium, a battery management system and a charging pile. The method includes: acquiring a charging demand parameter set by a user; calculating, according to the charging demand parameter and acquired actual operation state information of a battery, a target charging scheme for charging the battery; transmitting, according to the target charging scheme, a first charging request to a charging device, so that the charging device charges the battery according to the first charging request. According to the charging method, the apparatus, the device, medium, the battery management system and the charging pile provided in the embodiments of the present application, personalized smart charging can be achieved for different users.

Charging method, apparatus, device, medium, battery management system and charging pile

A charge and discharge circuit includes: a charging loop, including a battery pack, a first switch module and a charging device connected in series, where, the charging loop is configured to charge the battery pack using the charging device, and precharge the charging device; and a discharging loop, including the battery pack, a second switch module and an electric device connected in series, where, the discharging loop is configured to make the battery pack discharge to the electric device, and precharge the electric device; where, the first switch module and the second switch module each include at least one switch, and a part of switches in the first switch module and the second switch module are semiconductor switches, and the other part of the switches in the first switch module and the second switch module are relays.

In a battery heating system an inverter includes a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm connected in parallel, each of a upper bridge arm and a lower bridge arm is provided with a switch module, the switch module is connected in parallel with a buffer module; and a motor controller in the inverter is provided for providing driving signals to the switch module of a target upper bridge arm and the switch module of a target lower bridge arm to control the switch module of the upper bridge arm of any bridge arm among the three phases of bridge arms and the switch module of the lower bridge arm of at least one bridge arm among the bridge arms except the bridge arm where the switch module of the target upper bridge arm is located to be periodically turned on and off.

Battery heating system

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Ningde, China

Yizhen Hou