Method for matching lithium ion power batteries for automobiles

A power battery pack and power battery technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, electrolyte batteries, etc., can solve problems such as unsatisfactory use performance, and achieve the effect of long service life and stable energy output.

Inactive Publication Date: 2015-06-03
威睿电动汽车技术(苏州)有限公司
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  • Abstract
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Problems solved by technology

However, from the current state of use, the performance of the battery packs screened out by this method is not ideal.

Method used

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  • Method for matching lithium ion power batteries for automobiles
  • Method for matching lithium ion power batteries for automobiles
  • Method for matching lithium ion power batteries for automobiles

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Embodiment Construction

[0030] The technical solution of a lithium-ion power battery assembly method for automobiles involved in the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] First of all, the method involved in the present invention considers that the DC internal resistance of the battery has a more direct and intuitive influence on the performance of the battery for the application of the power storage unit of the vehicle. Secondly, the requirement of the vehicle power for the energy storage unit is mainly the power request, so the total energy of the battery pack has a direct relationship with the cruising range of the vehicle. Therefore, both parameters are reflected in the method involved in the present invention.

[0032] In addition, due to the differences among themselves, when the same type of battery releases the same capacity, its voltage platform may be different, so the total energy released when reach...

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Abstract

One embodiment of the invention provides a method for matching lithium ion power batteries for automobiles. The method comprises the following steps: obtaining a discharge capacity C value and an energy Q value of a battery to be screened; charging the battery to a first SOC value, and obtaining a voltage V0 of the current battery; discharging the battery to obtain the terminal voltage of the current battery, and obtaining DC internal resistance R; storing the battery at normal temperature for T1 hours, obtaining a battery voltage V2, and obtaining a voltage difference value delta V; finally determining whether the battery to be screened conforms to the demand or not according to one or more of the screening parameters: C, Q, R, V0 and delta V, for forming a power battery pack. The battery pack formed by batteries screened by the method for matching lithium ion power batteries for automobiles provided by the invention has relatively long service life and relatively stable energy output.

Description

technical field [0001] The invention relates to a method for grouping batteries, in particular to a method for grouping lithium-ion power batteries for automobiles. Background technique [0002] With the increasingly prominent environmental protection issues, the automotive industry has increasingly increased the research and development of new energy vehicles. At present, most automobile manufacturers have launched their own brand of new energy vehicles, including hybrid or pure electric power. [0003] Among them, for the power storage unit of new energy vehicles, lithium-ion batteries are selected due to their characteristics of high specific energy, high specific power and long cycle life. Moreover, in recent years, almost all new energy vehicles released by automobile manufacturers have adopted power systems based on lithium-ion battery energy storage. This also shows that lithium-ion batteries, as power storage batteries in the field of new energy vehicles, are the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/058
CPCY02E60/10Y02P70/50
Inventor 袁圣杰韦中乐钱广
Owner 威睿电动汽车技术(苏州)有限公司
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