Power lithium battery SOC storage method

A lithium battery and power technology, applied in the direction of measuring electricity, measuring electric variables, and electric digital data processing, etc., can solve problems such as errors in BMS stored data, achieve the effect of ensuring accuracy and avoiding loss of accuracy

Active Publication Date: 2019-11-29
力高(山东)新能源技术股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to hardware failure or power failure of the battery management system BMS during data saving, etc., the data stored by the battery management system BMS may be wrong

Method used

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Embodiment Construction

[0048] A power lithium battery SOC storage method includes a step of saving operating data and a step of restoring power-on data. They are described separately below.

[0049] Such as figure 1 As shown, the steps for saving the running data are as follows:

[0050] SA1, calculate the change of battery SOC, when the change of battery SOC reaches the set value, enter SA2, otherwise enter SA1; in this embodiment, the set value is 1% as an example. Other setting values ​​are within the protection scope of the present invention.

[0051] Specifically, the method of calculating the change of the battery SOC is as follows: in each operation cycle, the change of the battery SOC of the current cycle is taken as an absolute value and then accumulated. When the accumulated amount reaches the set value, the accumulated amount is cleared to zero.

[0052] SA2, the first storage unit in the charged erasable programmable read-only memory (EEPROM) stores the remaining capacity in the form of ampere ...

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Abstract

The invention relates to the field of power battery management systems and particularly relates to a power lithium battery SOC storage method. The method comprises a step of storing operation data, wherein the step of storing the running data comprises the following sub-steps of:firstly, whether a battery management system BMS is in a power-off state or not is judged; when the state is not a power-off state; and calculating the variation of the SOC of the battery, when the variation of the SOC of the battery reaches a set value, storing residual capacity in a first storage unit in an electrically erasable programmable read-only memory (EEPROM), increasing a data storage fault mark for the residual capacity in the first storage unit, and reading back and storing data after each time of storage. And when power is off, the residual capacity is stored in the third storage unit. The method has the advantages that when the battery management system BMS stores data in normal operation, a read-back mechanism is added, and the correctness of the stored data is ensured.

Description

Technical field [0001] The invention relates to the field of power battery management systems, and in particular to a method for storing power lithium battery SOC. Background technique [0002] The state of charge (SOC) of the power battery of an electric vehicle can be used to describe the current state of the battery, which is very important for the operation of the vehicle. When the Battery Management System (BMS) is powered on, it needs to read the last SOC data from the storage medium; when it is powered off, the SOC data needs to be written into the storage medium; during the operation of the vehicle, the SOC has been changing to meet Under certain conditions, it is also necessary to write the SOC data into the storage medium. Due to hardware failure or power failure of the battery management system BMS during data storage, the data stored in the battery management system BMS may be wrong. Summary of the invention [0003] In order to reduce the probability of error and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G01R31/00G01R31/387
CPCG06F3/0623G06F3/061G06F3/0619G06F3/0673G06F3/0638G06F3/0644G01R31/387G01R31/006
Inventor 沈永柏王翰超王云孙艳康义尹坤李享刘欢
Owner 力高(山东)新能源技术股份有限公司
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