Method and system for adaptive control of battery pack power

An adaptive control and battery pack technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve SOF estimation errors, do not consider battery aging, can not meet SOF estimation accuracy, etc., to improve estimation Rationality, the effect of convenient development and use

Active Publication Date: 2019-06-11
HUIZHOU BNET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, SOF estimation mainly adopts SOC (State of Charge, battery state of charge) and temperature look-up table method, but SOC and temperature measurement errors will cause SOF estimation errors, which cannot meet the requirements for SOF estimation accuracy
Moreover, this look-up method does not consider changes caused by battery aging, poor consistency and other conditions of use, and only relies on the original data provided by the battery.

Method used

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  • Method and system for adaptive control of battery pack power
  • Method and system for adaptive control of battery pack power
  • Method and system for adaptive control of battery pack power

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0037] Embodiment 1 of the present invention provides a method for adaptive control of battery pack power, figure 1 It is a flow chart of the method of Embodiment 1 of the present invention, please refer to figure 1 , the method of the embodiment of the present invention includes the following steps:

[0038] Step S101. Memorize the battery state parameters at a preset frequency during the battery working process, such as 10MS to memorize the ampere-hour, total voltage, single voltage, current and temperature, namely: △AH10MS, △SUMV10MS, △VOLT10MS, △CUR10MS, △T10MS;

[0039] Step S102. Calculate the change amount of each battery state parameter within the preset time length and the time period corresponding to the preset frequency, such as the change amount of memory ampere-hour data: △AH10MS0, △AH10MS1, △AH10MS2...△AH10MS(N);

[0040] Step S103. Calculate the difference between two adjacent variations, such as the difference in ampere hours: △AH difference 0=△AH10MS1-△AH10M...

Embodiment 2

[0048] Embodiment 2 of the present invention provides a battery pack power adaptive control method, which is an improvement on the basis of Embodiment 1. figure 2 It is the method flowchart of the second embodiment of the present invention, please refer to figure 2 , the method of the embodiment of the present invention includes the following steps:

[0049] Step S201, memorizing battery state parameters at a preset frequency during battery operation, the battery state parameters include ampere hours, total voltage, single cell voltage, current and temperature;

[0050]The preset frequency adopts the frequency with the fastest sampling frequency among all battery state parameters;

[0051] Step S202, calculating the change amount of each battery state parameter in the time period corresponding to the preset frequency within the preset time length;

[0052] The length of the preset time period is not less than the sampling period corresponding to the frequency with the slow...

Embodiment 3

[0062] Embodiment 3 of the present invention provides a battery pack power adaptive control system, image 3 It is a structural block diagram of the third embodiment of the present invention, please refer to image 3 The system for adaptive control of battery pack power in the embodiment of the present invention includes a battery state parameter memory module 1, a battery state parameter variation calculation module 2, a battery state parameter variation difference calculation module 3, a reference power output value determination module 4, and Correction module 5, the principle of each functional module will be described in detail below.

[0063] The battery state parameter memory module 1 is used to memorize battery state parameters at a preset frequency during battery operation;

[0064] The battery state parameter variation calculation module 2 is used to calculate the variation of each battery state parameter within the preset time length and the time period correspondi...

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Abstract

The invention discloses a power adaptive control method and system of a battery pack. The method comprises the following steps of memorizing battery status parameters with a predetermined frequency during the working process of a battery; calculating a variable quantity of each battery status parameter within a time period corresponding to the predetermined frequency in a predetermined time span; calculating a difference value between each two adjacent variable quantities; determining a reference power output value according to the difference value between adjacent variable quantities of each battery status parameter; and detecting a current actual power output value, comparing the actual power output value with the reference power output value, and correcting the actual power output value to be the reference power output value if the difference exists. The system comprises a battery status parameter memory module, a battery status parameter variable quantity calculation module, a battery status parameter variable quantity difference value calculation module, a reference power output value determination module and a correction module. By the method and the system, the power output value can be corrected in real time during the usage process of the battery pack, and the method and the system are more real time, more practical and more reasonable.

Description

technical field [0001] The present invention relates to the technical field of power batteries, and more specifically, relates to a method and system for adaptively controlling the power of a battery pack according to the change process of the battery state quantity. Background technique [0002] For electric vehicles, the power battery is a very common energy storage component, and its performance plays a decisive role in the performance of the vehicle. In the power battery, lithium-ion batteries are used as an important energy storage medium, and have been widely used in the field of new energy. Wide range of applications. The State of Function (SOF) estimation of the battery pack is one of the important parameters of the battery state, that is, to estimate the output capacity of the battery according to the state of charge, state of health and usage environment of the battery. Accurately estimate the current functional state of the battery, so that the battery pack can p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/48
CPCH01M10/4207H01M10/482H01M2010/4271Y02E60/10
Inventor 徐文赋任素云
Owner HUIZHOU BNET TECH CO LTD
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