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Lithium iron phosphate battery charging method and apparatus

A lithium iron phosphate battery and charging method technology, which is applied in the field of communication, can solve problems such as not considering the influence of battery temperature, and achieve the effects of preventing battery overheating, increasing charging capacity, and prolonging service life

Inactive Publication Date: 2017-10-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Embodiments of the present invention provide a charging method and device for a lithium iron phosphate battery to solve the problem in the prior art that the influence of the battery temperature on the lithium iron phosphate battery during charging is not considered

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  • Lithium iron phosphate battery charging method and apparatus
  • Lithium iron phosphate battery charging method and apparatus
  • Lithium iron phosphate battery charging method and apparatus

Examples

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no. 1 example

[0076] The embodiment of the present invention provides a charging method for a lithium iron phosphate battery, see figure 1 , the charging method includes:

[0077] Step S101, collecting temperature values ​​at each cell in the lithium iron phosphate battery.

[0078] Among them, the collection of the temperature value at the cell can be collected according to the temperature sampling points that have been set in the lithium iron phosphate battery. Each temperature sampling point is provided with a temperature sensor, and each temperature sampling point corresponds to one or more adjacent batteries. For example, generally the entire lithium iron phosphate battery pack is composed of 4 battery packs in series, each battery pack contains 4 cells, and a temperature sampling point is set between every two cells, which is considered as a cell Temperature, each battery pack contains two cell temperatures, and the entire battery pack has a total of 8 cell temperatures.

[0079] A...

no. 2 example

[0104] According to another aspect of the embodiments of the present invention, a charging device for a lithium iron phosphate battery is provided, see Figure 4 , the charging device includes:

[0105] The collection module 401 is used to collect the temperature value of each battery cell in the lithium iron phosphate battery.

[0106] Among them, the collection of the temperature value at the cell can be collected according to the temperature sampling points that have been set in the lithium iron phosphate battery. Each temperature sampling point is provided with a temperature sensor, and each temperature sampling point corresponds to one or more adjacent batteries. For example, generally the entire lithium iron phosphate battery pack is composed of 4 battery packs in series, each battery pack contains 4 cells, and a temperature sampling point is set between every two cells, which is considered as a cell Temperature, each battery pack contains two cell temperatures, and th...

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Abstract

The invention provides a lithium iron phosphate battery charging method and apparatus. The charging method comprises the following steps: temperature values of all electrical cores in a lithium iron phosphate battery are collected; according to the collected temperature values, a reference temperature value is determined; based on the reference temperature value, a charging current value is calculated; based on the calculated charging current value, the lithium iron phosphate battery is charged. When the reference value is in a preset low temperature zone, the charging current value increases as the reference temperature value goes up; when the reference temperature value is in a preset high temperature zone, the charging current value decreases as the reference temperature value increases; when the reference temperature value is in a normal temperature zone between the high temperature zone and the low temperature zone, the charging current value is a constant current value. According to the lithium iron phosphate battery charging method provided in the invention, influence exerted on the battery by battery temperature during charging process is taken into consideration, damage on the battery can be prevented during large current charging processes, usage safety of the battery is improved, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a charging method and device for a lithium iron phosphate battery. Background technique [0002] In recent years, as various countries pay more and more attention to energy conservation, emission reduction and development of low-carbon economy, lithium iron phosphate (LiFePO4) batteries have been more and more widely used due to their unique advantages. With the popularization of the application of lithium iron phosphate batteries, the battery management system has also been widely used. In order to give full play to the power performance of the battery, improve the safety of its use, prevent the battery from overcharging and For its performance as an energy storage device, the battery management system needs to select an appropriate charging method based on the characteristics of the battery to charge the battery reasonably, so that the battery can have a good state of ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44H01M10/60H01M10/61
CPCH01M10/443H01M10/60H01M10/61H02J7/00041H02J7/0026H02J7/04Y02E60/10
Inventor 叶彦宏
Owner ZTE CORP