Calb Co., Ltd.

Calb Group Co.,ltd.

Ruijun Ma

Fangfang Pan

Lulu Zhang

Shihui Zhang

Zhipeng Liu

Qiru Li

Kui Li

Qiang Yun

Yifan Dong

The invention discloses a method and a device for estimating the SOP of a battery system, which may effectively track the OCV change and impedance change under the current operating conditions of the battery system based on the amount of lithium intercalation in multiple predetermined positions in the active material in the battery of the battery system in the current operating condition, thereby determining the first dynamic correspondence between OCV and SOC under the current operating condition and the second dynamic correspondence between impedance and SOC.

Method and device for estimating state of power of battery system

A state of charge (SOC) determination method and apparatus for a battery system are disclosed. Based on a correspondence between impedance and SOC, a correspondence between OCV and SOC, and an operating current at a previous data collection moment, a correction coefficient at a current data collection moment can be determined. After the SOC estimated at the current data collection moment is corrected based on the correction coefficient, the accumulation of errors in the SOC can be eliminated, and the accuracy of the determined SOC is thereby improved.

State of charge determination method and apparatus for battery system

The disclosure provides a battery device, a detection method thereof, and a screening method and device of a battery unit. A difference between characteristic values of any two battery units within a preset range is controlled. The characteristic value reflects the difference between polarization internal resistances of different battery units, thereby reflecting the consistency difference between different battery units. The solution can dynamically monitor the consistency of each battery unit in the battery device, which can reflect the consistency of the battery unit during the usage process to implement the online monitoring of the battery unit, thereby providing guidance for the subsequent use of the battery device.

Battery device, detection method thereof, and screening method and device of battery unit

The invention discloses a battery device, a detection method thereof, and a screening method and device of a battery unit. A difference between characteristic values of any two battery units in the target charge state within a first preset range is controlled. Through the difference in overpotential of different battery units, the polarization difference between different battery units is reflected, thus reflecting the consistency difference between different battery units. The solution may dynamically monitor the consistency of various battery units, which may reflect the consistency of the battery unit during use, realize the online monitoring of the battery unit, and provide guidance for use of the battery device in subsequent process.

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Changzhou, China

Ruijun Ma