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Lithium ion battery power map limiting current measuring and calculating method

A lithium-ion battery and limiting current technology, which is applied in the direction of measuring electricity, measuring devices, electric vehicles, etc., can solve the problems of consuming a lot of time and testing resources, and achieve the effect of reducing the number of tests and reducing the waste of resources

Pending Publication Date: 2022-06-03
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if you try blindly, it will consume a lot of time and test resources, so the present invention proposes a calculation method to efficiently and accurately obtain the battery power pulse limit current value

Method used

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  • Lithium ion battery power map limiting current measuring and calculating method
  • Lithium ion battery power map limiting current measuring and calculating method
  • Lithium ion battery power map limiting current measuring and calculating method

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Embodiment Construction

[0019] The embodiments of the present patent application are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present patent application from the contents disclosed in this specification. The patent application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the patent application. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other under the condition of no conflict.

[0020] The present invention provides a technical scheme:

[0021] A lithium-ion battery power map limit current measurement method, comprising the following steps:

[0022] S1. Determine the upper and lower limit voltages corresponding to the battery u...

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Abstract

The invention discloses a lithium ion battery power map limiting current measuring and calculating method. The method comprises the following steps: S1, determining upper and lower limit voltages corresponding to a measured battery at different temperatures and different SOCs; s2, carrying out constant-voltage charging or discharging on the tested battery at different environment temperatures for t seconds by using the nC0 current, correspondingly setting an upper limit voltage or a lower limit voltage, and taking the corresponding current as the limiting current when the voltage of the battery core of the tested battery reaches the upper limit voltage and the lower limit voltage; wherein C0 is the actual discharge capacity of the tested battery. According to the lithium ion battery power map limiting current measuring and calculating method, the pulse charging / discharging limiting current is efficiently and accurately explored through large-current constant-voltage discharging / charging, and compared with an existing measuring and calculating method, the measuring and calculating method has the advantages that the number of tests is effectively reduced, resource waste is reduced, and the limiting current value of the lithium ion battery is efficiently and accurately measured and calculated.

Description

technical field [0001] The present patent application relates to the technical field of lithium-ion pulse charge and discharge current measurement and calculation, and in particular to a lithium-ion battery power map limit current measurement method. Background technique [0002] The battery management system is an important part of the electric vehicle, and the peak power of the battery, as its key estimate, provides a reference for the power distribution and energy control of the whole vehicle system of the electric vehicle, and is used to measure the acceleration and climbing performance of the electric vehicle, as well as its The braking energy recovery function during braking can effectively prevent the occurrence of over-discharge / over-charge of the battery pack, thereby improving the life of the battery pack. For the exploration of power, the exploration of limit current is inevitable. But blindly trying it will consume a lot of time and testing resources. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842
CPCG01R31/3842Y02T10/70
Inventor 钱慧霞夏劲王光俊
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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