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A method, device, and terminal equipment for obtaining remaining power of a battery pack

A technology of remaining power and acquisition method, which is applied to measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as large errors, battery overcharging, and over-discharging, and achieve the effect of avoiding over-charging and over-discharging

Active Publication Date: 2022-06-21
江西猛犸电动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a method, device and terminal equipment for obtaining the remaining power of the battery pack, so as to solve the problem of overcharging and over-discharging of the battery due to large errors in the current method of estimating the remaining power of the battery pack. security risks

Method used

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  • A method, device, and terminal equipment for obtaining remaining power of a battery pack
  • A method, device, and terminal equipment for obtaining remaining power of a battery pack
  • A method, device, and terminal equipment for obtaining remaining power of a battery pack

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Embodiment 1

[0041] like figure 1 As shown, this embodiment provides a method for obtaining a remaining circuit of a battery pack, which specifically includes:

[0042] Step S101: Calculate the initial weight of the power-on weight of the battery pack according to the maximum initial SOC and the minimum initial SOC of the single cell.

[0043] In specific applications, SOC refers to the state of charge of the battery, also known as the remaining power, which refers to the ratio of the remaining capacity of the battery to the capacity of the fully charged state, usually expressed as a percentage. The maximum SOC limit value for battery charging refers to a preset maximum value of SOC during battery charging, such as 100%. The battery discharge minimum SOC limit value refers to a preset minimum value of the SOC during the battery discharge process, for example, 0.

[0044]In a specific application, the maximum initial SOC and the minimum initial SOC of a single cell in the battery pack are...

Embodiment 2

[0067] like Image 6 As shown, in this embodiment, step S103 in Embodiment 1 specifically includes:

[0068] Step S201: Read the maximum SOC and the minimum SOC of the single cell in the battery pack at the current moment.

[0069] In a specific application, the voltage values ​​of all the single cells in the battery pack at the current moment are obtained, and the voltage values ​​of the single cells are sorted in descending order, and the maximum value of the parallel voltage of the single cells and the parallel voltage of the single cells are selected. For the two single cells with the minimum value, read the SOC of the corresponding single cell as the maximum SOC of the single cell and the minimum SOC of the single cell respectively. That is, the SOC of the single cell with the maximum parallel voltage of the single cell is regarded as the maximum SOC of the single cell, and the single cell SOC with the minimum parallel voltage of the single cell is regarded as the minimu...

Embodiment 3

[0084] like Figure 7 As shown, this embodiment provides an apparatus 100 for obtaining the remaining power of a battery pack, which is used for performing the method steps in Embodiment 1, and includes a weight calculation module 101 , an estimation module 102 , an update module 103 and a transmission module 104 .

[0085] The weight calculation module 101 calculates the initial weight of the power-on weight of the battery pack according to the maximum initial SOC and the minimum initial SOC of the single cell.

[0086] The estimation module 102 is configured to calculate the estimated SOC of the battery pack at the current moment according to the maximum SOC, the minimum SOC of the single cell in the battery pack at the current moment, and the initial weight of the power-on weight of the battery pack.

[0087] The updating module 103 is configured to update the weight factor of the power-on weight of the battery pack to obtain the current weight according to the maximum SOC,...

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Abstract

The present invention is applicable to the field of battery technology, and provides a method, device and terminal equipment for obtaining the remaining power of a battery pack, including calculating the initial weight of the power-on weight of the battery pack according to the maximum initial SOC and the minimum initial SOC of a single battery cell; Calculate the estimated SOC of the battery pack at the current moment based on the maximum SOC, minimum SOC, and initial weight of the battery pack’s power-on weight at the current moment; according to the maximum SOC, minimum SOC, and For the estimated battery pack SOC at the current moment, update the weight factor of the power-on weight of the battery pack to obtain the current weight; determine the target battery pack SOC at the current moment according to the current weight, the maximum SOC and the minimum SOC of the single cells in the battery pack at the current moment, and send to The user sends the target battery pack SOC at the current moment. The maximum SOC and minimum SOC of the single cells in the battery pack are weighted as the battery pack SOC output, and the battery output is controlled according to the battery pack SOC output, effectively avoiding overcharging and over-discharging of the battery pack.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method, a device and a terminal device for obtaining the remaining power of a battery pack. Background technique [0002] The remaining power (SOC) is the ratio of the remaining capacity of the battery after being used for a period of time or left unused for a long time to the capacity of the fully charged state. By displaying the remaining power, the user can know the current remaining capacity of the battery, improve the user's experience of use, and ensure The battery is safe to use. Lithium-ion battery packs are usually composed of dozens or even hundreds of single cells in series and in groups. Due to inconsistencies in production or use, the SOC of each cell will be different, so each cell has its own How to determine the remaining power of the battery pack according to the remaining power of each single cell is a bottleneck problem at present. [0003] At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367G01R31/387G01R31/396
Inventor 吴明舒星
Owner 江西猛犸电动科技有限公司
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