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Battery system power limit estimation method based on cell voltage

A battery system and power limiting technology, applied in design optimization/simulation, special data processing applications, etc., can solve the problems of inaccurate SOC estimation and easy failure, not considering the factors affecting the cell terminal voltage CCV, etc., to improve the accuracy. Effect

Active Publication Date: 2021-11-26
ZHEJIANG LEAPMOTOR TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems in the prior art that the traditional Power Limit estimation algorithm does not consider the influencing factors of the battery terminal voltage CCV and the SOC estimation is inaccurate and easy to fail, and provides a high estimation accuracy based on the battery voltage. Estimation method for battery system power limit

Method used

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  • Battery system power limit estimation method based on cell voltage
  • Battery system power limit estimation method based on cell voltage

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Embodiment Construction

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like figure 1 A battery system power limit estimation method based on a battery voltage, including input module, TPOUT processing module, VPOUT processing module, DPOUT processing module, and output module, TPOUT processing module, VPOUT processing module, and DPOUT processing Modules are connected to the input module, the output module, and the DPOUT process module, the TPOUT processing module, the VPOUT processing module, and the DPOUT processing module are sequentially connected, including the following steps:

[0025] Step 100, in the input module, enter the highest electrical core temperature Max (TN), the lowest battery temperature min (TN), the lowest monomer battery voltage min (VN), and abnormal diagnostic table DTCs;

[0026] Step 200, in the TPOUT processing module, establish a relationship table of the power PowerLimit of the battery temperature and the ba...

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Abstract

The invention discloses a battery system power limit estimation algorithm based on cell voltage, including an input module, a TPout processing module, a VPout processing module, a DPout processing module and an output module, and the TPout processing module, VPout processing module and DPout processing module are all compatible with The input module is connected, the output module is connected with the DPout processing module, and the TPout processing module, VPout processing module and DPout processing module are connected in sequence. The present invention removes the SOC factor when estimating the sustainable output power Power Limit of the battery system, and replaces it with the terminal voltage CCV of the battery cell. The invention has the characteristics of high estimation precision.

Description

Technical field [0001] The present invention relates to the field of battery power state calculation, and in particular, to an estimated accuracy of a battery-based battery system power limit estimation method. Background technique [0002] The battery system can output power SOP, including the power Power Limit and effective power Available Power of battery system, where Power Limit is the maximum discharge and charging power of the battery when the battery is available. [0003] Accurate estimation of Power Limit can maximize the utilization efficiency of the battery. For example, it can absorb feedback energy as much as possible during the brakes without harming the battery. A larger power can be provided when acceleration can provide a larger acceleration without harming the battery. At the same time, it is also possible to ensure that the vehicle will lose power during the driving process, even when the SOC is very low in the charge state. For low temperatures, old batteries...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 张新锋杨龙雨宋忆宁
Owner ZHEJIANG LEAPMOTOR TECH CO LTD
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