Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Yu Yan

Zhimin Dan

Zhanliang Li

Xiyang Zuo

Xinwei Chen

Xiaojian Huang

Yuanmiao Zhao

Miaomiao Zhang

Yuan Yao

Jinfeng Gao

Weiping Sun

Shuyun Xiong

Wei Zhang

Meng Li

Weichen He

Yizhen Hou

Xiao Wang

Xianxi Pan

Guiying Lin

Zhenhui Huang

Huaisen Zhang

Longzhen Lin

Haizu Jin

Yonghuang Ye

Qian Liu

Shichao Li

Wei Chen

Chengyong Liu

Bao Li

Jianfu He

Shan Huang

Haili Li

Qidong Lou

Xian Huang

Chunfa Wang

Yanming Zhao

Huanle Zhou

Yiqi Liang

Chenxu Luo

Diping Liu

Provided are a power battery voltage regulation circuit and system, and a control method and a control apparatus therefor. The power battery voltage regulation circuit includes a power module, a heating module, a charge/discharge interface, and a voltage regulation switch assembly, wherein the heating module comprises an energy storage element and a switch module; the power module comprises at least a first power battery and a second power battery; the power module is connected in parallel with the switch module; and an external charge/discharge device is connected in parallel with the power module through the charge/discharge interface; the voltage regulation switch assembly comprises a plurality of switches that are provided between the charge/discharge interface and the power module; and the voltage regulation switch assembly and the switch module are used for regulating, in response to a control signal, a charge/discharge voltage between the external charge/discharge device and the power module.

Power battery voltage regulation circuit and system, and control method and control apparatus therefor

A heating method traction battery. The traction battery is connected to a switch circuit of a motor and configured to supply power to the motor via the switch circuit. The switch circuit includes multiple legs and the multiple legs are connected to the traction battery in parallel. The method includes: receiving a heating signal sent by a battery management system of the traction battery; and controlling, according to the heating signal, at least one of the multiple legs to form a short-circuit loop of the traction battery, the short-circuit loop being configured to discharge the traction battery and heat the traction battery during the discharging process.

Heating method and heating system of traction battery

The present application relates to a method for heating a battery pack, where the battery pack is connected to an inductive load via a converter and the method includes: controlling on and off of a switch module in the converter upon receiving a heating request, so as to control discharging and charging between the battery pack and the inductive load, connecting the battery pack and an auxiliary heating mechanism in parallel during a discharging stage of the battery pack; and disconnecting the auxiliary heating mechanism from the battery pack during a charging stage of the battery pack. The present application further relates to a battery heating system and an electric apparatus.

Method for heating a battery pack, battery heating system and electric apparatus

System and method for testing power conversion devices are provided. A power supply grid is connected to an AC terminal of a first power conversion device, the power supply grid is also connected to an AC terminal of the second power conversion device, and a DC terminal of the first power conversion device is connected to a DC terminal of the second power conversion device. In this way, a test loop is formed by the power supply grid, the first power conversion device and the second power conversion device. In this test loop, the first power conversion device and the second power conversion device act as a load and a power source, so no additional DC power supply and load are required during the test.

Test system and method for power conversion devices, electronic device, and storage medium

A charging method includes: acquiring a state parameter of a power battery by a power conversion apparatus; setting a charging mode to a pulse charging mode by the power conversion apparatus when the battery temperature is lower than a first preset threshold; and converting charging power of a charging apparatus and then charging the power battery by the power conversion apparatus in the pulse charging mode. Through the technical solution, the power conversion apparatus acquires a battery temperature of the power battery, when the battery temperature is lower than the first preset threshold, the power conversion apparatus converts the charging power output by the charging apparatus, and outputs a pulse current to charge the tract battery, to prevent the charging apparatus directly charging the power battery in a low temperature, thereby ensuring the performance of the power battery.

Charging method and power conversion apparatus

An isolated resonant conversion control apparatus includes a voltage and current obtaining unit configured to obtain an output voltage and an output current of an output-side switch transistor of an isolated resonant conversion unit, and a processing unit configured to calculate a switching frequency of an input-side switch transistor of the isolated resonant conversion unit based on the output voltage and the output current, obtain a turn-on offset time and a turn-off offset time of the output-side switch transistor relative to the input-side switch transistor based on the switching frequency of the input-side switch transistor, obtain a duty ratio of a second driving signal based on a duty ratio of a first driving signal, the turn-on offset time, and the turn-off offset time, and generate the second driving signal based on the switching frequency and the duty ratio of the second driving signal.

Isolated resonant conversion control method, apparatus and system, and readable storage medium based on switching frequency of input-side switch transistor

A switching circuit includes a switching transistor, a metal unit, and a branch. The metal unit is provided at the switching transistor, and the branch is electrically connected between a ground and at least one of the switching transistor or between the metal unit. The branch includes a capacitor, and the capacitor is configured to discharge radiated interference.

Switching circuit and power supply device

A self-heating control circuit includes a control module configured to obtain a cell temperature of each of two battery packs connected in parallel and send a trigger signal in response to the cell temperature being lower than a threshold. The two battery packs include a first battery pack and a second battery pack. The control circuit further includes a switch module disposed at a charging and discharging circuit of the first battery pack. A control terminal of the switch module is connected to the control module and is configured to cut off the charging and discharging circuit upon reception of the trigger signal. The control circuit also includes an excitation module configured to form a path with the two battery packs upon cut-off of the charging and discharging circuit, and generate an excitation current, so that the excitation current flows back and forth between the two battery packs.

Self-heating control circuit and system

A battery charging control method applicable to a vehicle electrical system that includes a current control unit including a semiconductor device. Two ends of the current control unit are connected to a battery and a charging power supply, respectively. The method includes controlling, when a temperature of the battery is below a preset temperature, the current control unit to be in a first state in which the semiconductor device is reversely connected in a circuit, sending a first charging request including a first charging current required to heat the battery to the preset temperature, controlling, when the temperature of the battery reaches the preset temperature, the current control unit to be in a second state in which the semiconductor device is disconnected from the circuit or forwardly connected in the circuit, and sending a second charging request including a second charging current at which the battery is charged.

Battery charging method and vehicle electrical system for controlling charging current based on temperature of battery

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

A voltage conversion circuit includes an N-level conversion unit and N−1 DC-DC conversion units. The N-level conversion unit includes N output terminals at different levels. A first input terminal of an MDC-DC conversion unit is connected to an Moutput terminal of the N-level conversion unit, and a second input terminal of the MDC-DC conversion unit is connected to an (M+1)output terminal of the N-level conversion unit. An output level of the Moutput terminal and an output level of the (M+1)output terminal are adjacent levels. N and M are positive integers and satisfy N≥3 and 1≤M<N.

Voltage conversion circuit, charging apparatus, and electric device

A device and method for heating a battery are provided. The device is provided on a first power-consuming device and includes: a first interface electrically coupled to a neutral point of a motor winding of the first power-consuming device; a second interface electrically coupled to a negative electrode of a battery of the first power-consuming device; and a control module coupled to a control system of the first power-consuming device and a control system of a second power-consuming device to coordinate and control the first power-consuming device and the second power-consuming device. The first interface is engageable with a third interface electrically coupled to a neutral point of a motor winding of the second power-consuming device. The second interface is engageable with a fourth interface electrically coupled to a negative electrode of a battery of the second power-consuming device. The control module is configured to perform a battery heating step.

Device and method for heating a battery

A charging/discharging apparatus, a method for charging a battery and a charging/discharging system, the charging-and-discharging apparatus including a bidirectional AC/DC converter, a first DC/DC converter, and a control unit, where the first DC/DC converter is a bidirectional DC/DC converter; and where the control unit is configured to: receive a first charging current sent by a BMS of a battery, control the bidirectional AC/DC converter and the first DC/DC converter according to the first charging current to charge the battery through an AC power; receive a first discharging current sent by the BMS and discharging a power of the battery according to the first discharging current; and receiving a second charging current sent by the BMS and control the bidirectional AC/DC converter and the first DC/DC converter according to the second charging current to charge the battery through the AC power.

Charging-and-discharging apparatus, method for charging a battery and charging-and-discharging system

Embodiments of the present application provides a method for pre-charging a power conversion device and a power conversion device. The power conversion device is configured to perform power conversion between a charging pile and a traction battery, and the method includes: receiving, by the power conversion device, a first message sent by a battery management system of the traction battery, and the first message is configured to indicate that the battery management system is ready for charging; performing, by the power conversion device, a pre-charging, and the pre-charging includes: charging a capacitor in the power conversion device; and forwarding, by the power conversion device, the first message to the charging pile after the pre-charging is completed. The technical solution of the embodiments of the present application can ensure a normal charging process.

Power conversion device

Embodiments of the present application provide a battery swapping method, module, device and medium. The method includes: acquiring a first image captured for a vehicle within a battery swapping area, and acquiring a first location of a battery on the vehicle; determining a second location of the vehicle in the battery swapping area according to the first image; determining, according to the first location and the second location, a target location of the battery in the battery swapping area to control a battery swapping device to move to the target location for battery swapping. According to the embodiments of the present application, battery swapping can be completed in a case where a user parks the vehicle randomly in the battery swapping area. Thus, convenience of the battery swapping process is improved.

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Ningde, China

Yu Yan