Battery capacity forecasting method with self-adaptive temperature compensating function

An adaptive compensation and battery capacity technology, applied in the direction of temperature compensation modification, measurement of electrical variables, measurement of electricity, etc., can solve problems such as temperature capacity estimation deviation correction, and achieve the effect of improving estimation accuracy

Inactive Publication Date: 2014-01-22
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention is to solve the problem that the traditional Peukert equation cannot correct the capacity estimation deviation caused by temperature, and provides a battery capacity prediction method with temperature adaptive compensation

Method used

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  • Battery capacity forecasting method with self-adaptive temperature compensating function
  • Battery capacity forecasting method with self-adaptive temperature compensating function
  • Battery capacity forecasting method with self-adaptive temperature compensating function

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specific Embodiment approach 1

[0032] Specific implementation mode 1: The battery capacity prediction method with temperature adaptive compensation in this implementation mode is implemented according to the following steps:

[0033] Step 1. Determine the variation range of the test temperature and the discharge rate according to the actual use needs of the battery to be tested; wherein, the range of the test temperature is [-10°C, 40°C], and the range of the discharge rate is [0.3C, 3.6°C] C];

[0034] Step 2. At ambient temperature T 1 Next, the discharge rate is I 1 , I 2 ,...,I m In the battery discharge experiment, the charging experiment adopts a unified constant current charging standard, records the discharge power of each cycle, and uses the discharge rate I as the actual usable capacity of the battery. 1 The available capacity of the battery under Q 11 and discharge rate I m The available capacity of the battery under Q 1m , into the Peukert equation

[0035] Q=kI (1-p)

[0036] Among th...

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Abstract

The invention discloses a battery capacity forecasting method with a self-adaptive temperature compensating function, relates to the battery capacity forecasting method, and aims to solve the problem that the conventional Peukert equation cannot correct a capacity estimating error caused by temperature. The battery capacity forecasting method with the self-adaptive temperature compensating function comprises the following steps: 1, determining the change range of test temperature and a discharge rate; 2, performing battery discharging experiments with the discharge rates of I1, I2, ..., Im at an ambient temperature T1 respectively; 3, changing the ambient temperature into T2, repeating the step 2, and calculating Peukert equation coefficients p (T2) and k (T2); 4, establishing corresponding relationships between the ambient temperature and the Peukert equation coefficient p as well as the Peukert equation coefficient k; 5, in combination with the formula, obtaining a functional relationship between the battery capacity and the temperature as well as the discharge current. The battery capacity forecasting method with a self-adaptive temperature compensating function is applied to the field of lithium battery parameter detection.

Description

technical field [0001] The invention relates to a battery capacity prediction method. Background technique [0002] Capacity is a very important performance index of lithium-ion batteries. It represents the continuous discharge capacity of the battery. In many occasions where rechargeable batteries are used, it is necessary to determine the available capacity of the battery, such as a battery capacity meter, which is an essential instrument for electric vehicles. It can reliably inform the user of the true capacity and possible mileage of the battery. Therefore, in many occasions where batteries are used, it is necessary to monitor the battery capacity to prevent accidents caused by misjudgment, improper use of batteries, shortened battery life, and even potential safety hazards. [0003] The capacity of lithium batteries is greatly affected by the environment and the charging and discharging system. Therefore, these factors must be comprehensively considered in order to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R1/44
Inventor 刘丹王启松刘昕张岩孙金玮朱春波
Owner HARBIN INST OF TECH
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