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Battery soc estimation method and device

A battery and battery capacity technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of inaccurate SOC estimation and achieve the effect of improving accuracy

Pending Publication Date: 2022-07-29
SUZHOU JK ENERGY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the present invention will solve the technical problem of inaccurate SOC estimation in the prior art, thereby providing a battery SOC estimation method and device

Method used

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  • Battery soc estimation method and device
  • Battery soc estimation method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a battery soc estimation method. The estimation method can first collect the charge and discharge current and voltage signals of the battery to be tested by a hardware device such as circuit detection, and then calculate, discriminate and calculate the data according to the collected data by a server and other devices. Output, and finally write the estimation method into the battery charging and discharging equipment or other devices that detect the battery soc, so as to realize the estimation of the battery soc during the charging and discharging process of the battery to be tested, such as figure 1 shown, including the following steps:

[0045] In step S101, the charging and discharging current is collected with a preset sampling period, and the current battery capacity corresponding to the charging and discharging current is acquired.

[0046] The battery to be tested referred to in this embodiment can be a lithium battery, a lead-acid batter...

Embodiment 2

[0091] This embodiment provides an apparatus for estimating battery soc, which can be used to execute the battery soc estimation method in Embodiment 1 above. The apparatus can be set inside a server or other equipment, and modules cooperate with each other to realize battery soc estimation ,like Figure 4 As shown, the device includes:

[0092] The acquisition module 201 is used to collect the charging and discharging current with a preset sampling period, and acquire the current battery capacity corresponding to the charging and discharging current;

[0093] an integration module 202, configured to calculate the current integration capacity corresponding to the charging and discharging current;

[0094] The judgment module 203 is configured to determine the corresponding current battery capacity weight and current integral capacity weight according to whether the charging and discharging current satisfies the corresponding preset current range;

[0095] The calculation mod...

Embodiment 3

[0099] This embodiment provides a computer device, such as Figure 5 As shown, the computer device includes a processor 301 and a memory 302, wherein the processor 301 and the memory 302 can be connected by a bus or in other ways, Figure 5 Take the connection through the bus as an example.

[0100] The processor 301 may be a central processing unit (Central Processing Unit, CPU). The processor 301 may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), graphics processor (Graphics Processing Unit, GPU), embedded neural network processor (Neural-network Processing Unit, NPU) or other Dedicated deep learning co-processors, Application Specific Integrated Circuits (ASICs), Field-Programmable GateArrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. chip, or a combination of the above types of chips.

[0101]As a non-transitory computer-readable storage ...

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Abstract

The invention provides a battery soc estimation method and device, and the method comprises the steps: collecting the charging and discharging current according to a preset sampling period, and obtaining the current battery capacity corresponding to the charging and discharging current; calculating current integral capacity corresponding to the charging and discharging current; determining a corresponding current battery capacity weight and a current integral capacity weight according to whether the charging and discharging current meets a corresponding preset current range or not; according to the current battery capacity corresponding to the charging and discharging current, the current battery capacity weight, the current integral capacity and the current integral capacity weight, the actual residual capacity corresponding to the charging and discharging current is calculated, and the accuracy of estimating the actual residual capacity of the battery is greatly improved through a weight distribution method.

Description

technical field [0001] The invention relates to the technical field of power battery remaining power calculation, in particular to a battery soc estimation method and device. Background technique [0002] The development of the new energy vehicle industry is inseparable from the use of power batteries. In order to better use the power batteries, it is necessary to use the battery management system BMS (Battery Management System) to monitor the battery status, battery protection, and charge and discharge control. Keep the battery in an optimal state. Among them, the state monitoring battery current remaining capacity SOC (State of charge) is particularly important. [0003] The battery SOC, that is, the state of charge, is used to reflect the remaining capacity of the battery, and its value is defined as the ratio of the remaining capacity to the battery capacity, usually expressed as a percentage. Its value range is 0-1. When SOC=0, it means that the battery is fully disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/382G01R31/378G01R31/367
CPCG01R31/382G01R31/378G01R31/367
Inventor 施敏捷王泽杨宝顺
Owner SUZHOU JK ENERGY LTD