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Method, device, and terminal equipment for battery pack power detection

A detection method and technology of detection device, which are applied in the direction of measurement device, measurement of electrical variables, measurement of electricity, etc., can solve the problems of large errors in battery packs, overcharge and overdischarge of batteries, and achieve the effect of avoiding jumps in remaining power.

Active Publication Date: 2021-05-14
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

[0003] In view of this, the embodiment of the present invention provides a battery pack power detection method, device and terminal equipment to solve the large error in the current method of estimating the remaining power of the battery pack, so that the battery has potential safety hazards of overcharging and overdischarging The problem

Method used

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  • Method, device, and terminal equipment for battery pack power detection
  • Method, device, and terminal equipment for battery pack power detection
  • Method, device, and terminal equipment for battery pack power detection

Examples

Experimental program
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Embodiment 1

[0037] Such as figure 1 As shown, this embodiment provides a battery pack power detection method, which specifically includes:

[0038] Step S101: Calculate the initial remaining power of the battery pack according to the maximum and minimum initial remaining power of the single cells.

[0039] In specific applications, the remaining capacity of the battery pack refers to the state of charge of the battery pack, which refers to the ratio of the remaining capacity of the battery pack to the capacity of the fully charged state, usually expressed as a percentage.

[0040] In a specific application, the battery pack includes several parallel-connected single cells. Due to the difference in material and process of each single cell, its discharge or charge parameters will be different. Therefore, in the same battery pack, the Different single cells have different remaining power. Among them, the maximum initial remaining power of a single cell refers to the remaining power of the ...

Embodiment 2

[0081] Such as Figure 5 As shown, in this embodiment, step S101 in Embodiment 1 specifically includes:

[0082] Step S201: Determine the initial remaining power of each single battery cell according to the resting time.

[0083] In a specific application, by reading the rest time before the microprocessor is powered on (t Rest ), to determine whether the standing time is greater than 1 hour. If the standing time is greater than 1 hour, the temperature (T Cell ) and open circuit voltage (V Bat ) relationship curve ( image 3 ) to obtain the initial remaining power (SOC) of each single cell at this time k (0)); if the standing time is less than 1 hour, then judge whether it is fully charged before standing, if it is not fully charged before standing, read each single cell in the register when the microprocessor was powered off last time The remaining power of each single cell is taken as the initial remaining power of each single cell (SOCk (0)), if it is fully charged be...

Embodiment 3

[0094] Such as Image 6 As shown, this embodiment provides a battery pack power detection device for performing the method steps in Embodiment 1, which includes a first calculation module 101, a capacity determination module 102, a second calculation module 103, and a remaining power determination module 104 .

[0095] The first calculation module 101 is used for calculating the initial remaining power of the battery pack according to the maximum initial remaining power and the minimum initial remaining power of the single cells.

[0096] The capacity determination module 102 is used to determine the maximum discharge capacity of the battery pack according to the current temperature of the battery pack.

[0097] The second calculation module 103 is used to calculate the maximum remaining power and the minimum remaining power of the single battery at the current moment according to the maximum initial remaining power, the minimum initial remaining power, the maximum discharge ...

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Abstract

The present invention is applicable to the field of battery technology, and provides a battery pack power detection method, device and terminal equipment, including: calculating the initial remaining power of the battery pack according to the maximum initial remaining power and the minimum initial remaining power of a single battery cell; The current temperature of the battery pack determines the maximum discharge capacity of the battery pack; calculates the current battery cell battery charge according to the maximum initial remaining power, the minimum initial remaining power, the maximum discharge capacity, and the charge of each single cell. The maximum remaining power and the minimum remaining power of the cell; according to the initial remaining power of the battery pack, the maximum initial remaining power of a single cell, the maximum remaining power of a single cell at the current moment, and the minimum remaining power of a single cell at the current moment, Determine a battery pack power level to detect the remaining power capacity of the battery pack at the current moment. The impact of battery temperature on battery capacity and open circuit voltage is considered, and the impact of remaining power jumps caused by temperature changes is avoided.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a battery pack power detection method, device and terminal equipment. Background technique [0002] The remaining capacity (SOC) is the ratio of the remaining capacity of the battery after it has been 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 capacity, 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. At present, the remaining power of the battery is mainly obtained through the ampere-hour integration method, but the influence of the battery temperature on the battery capacity is not considered in obtaining the remaining battery power through the ampere-hour integration method, and due to the cumulative error, the existing ampere-hour integration method cannot obtain accurate information. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367G01R31/388G01R31/374
Inventor 吴明舒星
Owner 江西猛犸电动科技有限公司