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Monitoring method and system for remained charge of battery pack

A technology of remaining power and battery packs, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc.

Inactive Publication Date: 2018-12-28
深圳市格瑞普智能电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uncertainty of the environment where the drone is used, it may be in a place where the temperature is particularly low, it may be in a place where the air is very thin, and the fluctuation of the large current during the flight, which will cause the drone's fuel gauge to be difficult. Accurately judge the available remaining power at this time, so drone bombing incidents have also occurred frequently in the past one or two years

Method used

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  • Monitoring method and system for remained charge of battery pack
  • Monitoring method and system for remained charge of battery pack
  • Monitoring method and system for remained charge of battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] see figure 1 As shown, this embodiment provides a method for monitoring the remaining power of a battery pack, which mainly includes the following steps:

[0104] Step 101: Monitor the current state of the battery pack, and determine the state of the battery pack.

[0105] If the battery is currently in a charging state, execute steps 102-105.

[0106] The situation that the battery pack is currently in other states can be handled according to the prior art, but not limited to.

[0107] The battery pack in this embodiment generally consists of one or more single-cell batteries with the same design parameters.

[0108] The single battery described in this embodiment can be: a series unit composed of multiple single batteries connected in parallel. At this time, the voltage of a single battery is the voltage of the unit composed of multiple single batteries connected in parallel, and the current of a single battery is the current of the battery pack. Since the current ...

Embodiment 2

[0143] see figure 2 As shown, the difference between this embodiment and embodiment 1 is:

[0144] The internal resistance of a single battery in this embodiment is obtained through real-time monitoring during the charging process, and the scheme is as follows:

[0145] Also include between step 102 and step 103:

[0146] Step 201: Calculate the internal resistance of the single battery with the smallest current voltage value in the battery pack as the internal resistance of the single battery described in step 103.

[0147] In this embodiment, a switch circuit may be connected in series in the charging circuit. When the switch circuit is turned off, the charging circuit of the battery pack is disconnected; when the switch circuit is turned on, the charging circuit of the battery pack is turned on.

[0148] By measuring the moment before and after the switch circuit is turned on, the voltage and current of the single battery with the smallest current voltage value in the ba...

Embodiment 3

[0161] see image 3 As shown, the differences between this embodiment and embodiment 2 are:

[0162] After step 101, when it is determined that the battery pack is currently in a discharging state, steps 301-302 are executed according to this embodiment. details as follows:

[0163] Step 301: Monitor the discharge current of the battery pack, calculate the power consumption, and calculate the current remaining power of the battery pack according to the power consumption and the previous remaining power.

[0164] In this embodiment, the discharge current of the battery pack is regularly monitored, and the current power consumption is calculated according to the discharge current.

[0165] Record the calculation start time of the current calculated power consumption as T1;

[0166] Record the calculation cut-off time of the current calculated power consumption as T2;

[0167] Record the power consumption as Q, according to the following function

[0168] Calculate the pow...

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Abstract

The invention relates to the field of circuits, and discloses a monitoring method and system for remained charge of a battery pack. The method comprises the following steps of: S1, monitoring a current state of the battery pack; when the battery pack is currently in a charged state: sampling the voltage of each single battery in the battery pack; calculating the open-drain voltage of the single battery with the smallest current voltage value in the battery pack according to a current charging current, a single battery voltage with the smallest current voltage value in the battery pack, internal resistance of the single battery; querying a mapping table; updating current remained charge percentage of the battery pack to corresponding remained charge percentage value of the open-drain voltage of the single battery with the smallest current voltage value in the battery pack in the mapping table; and returning to S1. The mapping table is pre-stored with a mapping relation between the open-drain voltage of the single battery with the smallest current voltage value in the battery pack and the current remained charge percentage value of the battery pack under a resting state of the battery pack.

Description

technical field [0001] The invention relates to a method and system for monitoring the remaining power of a battery pack. Background technique [0002] With the continuous development of economy and technology, UAVs have more and more uses and functions, and their application industries are becoming wider and wider, including consumer UAVs, security UAVs, surveying and mapping UAVs and plant protection. UAVs etc. But without exception, they have always faced a big risk point, that is, due to the accuracy of battery power estimation, they did not accurately estimate the remaining power of the battery and could not accurately control the return of the drone when the remaining power is not enough. As a result, the unmanned aerial vehicle suddenly lost its discharge ability while flying in the air, and then the unmanned aerial vehicle fell directly from the sky, which is commonly known in the industry as "the bomber". The harm of bombing planes can be imagined. Almost all plan...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 刘晓刚李湘波邓昕胡兵华
Owner 深圳市格瑞普智能电子有限公司
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