Manufacturing method of lithium-ion battery pack used for electric automobile

A technology for a lithium-ion battery pack and a manufacturing method, which is applied in the field of automobiles, can solve problems such as hidden dangers of safety, many batteries in series and parallel, unfavorable for mass production, etc., and achieves the effect of assembly safety.

Active Publication Date: 2011-01-12
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, due to the high supply voltage, the traditional battery pack manufacturing method has great potential safety hazards in the production process, and more batteries are connected in series and parallel, it is difficult to guarantee the performance of the assembled batteries, which is not conducive to mass production

Method used

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  • Manufacturing method of lithium-ion battery pack used for electric automobile
  • Manufacturing method of lithium-ion battery pack used for electric automobile
  • Manufacturing method of lithium-ion battery pack used for electric automobile

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Experimental program
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Embodiment Construction

[0023] The present invention will be specifically described below in conjunction with the accompanying drawings.

[0024] First, perform 5 to 10 charge and discharge cycles on the lithium iron phosphate single battery 1 that needs to be assembled according to the same charge and discharge parameters, and then fully charge the single battery 1 and store it at 50°C to 80°C for 5 to 15 days. Aging treatment, the single battery 1 to be matched is selected according to the capacity change of a single battery within 5 to 10 charge-discharge cycles ≤ 1%, the capacity difference between individual batteries ≤ 2%, and the internal resistance difference of the battery after high-temperature aging is less than 3mΩ , the voltage difference is less than 3mV.

[0025] refer to figure 1 A plurality of single batteries 1 are connected in parallel to form a battery unit 2 by means of arc-shaped copper and nickel-plated copper connection plates 3 by means of spot welding or stop nut connection...

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PUM

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Abstract

The invention discloses a manufacturing method of a lithium ion battery pack used for an electric automobile, comprising the following steps: (1) selecting monomer batteries which are to make sets; (2) connecting multiple monomer batteries in parallel to form a battery unit according to the requirement of the electric automobile motor power and the range mileage parameters; (3) connecting multiple battery units in series to form a battery module; (4) connecting multiple battery modules in series to form a battery pack; and (5) placing the battery pack into an external shell, and arranging an insulation plate on the top of the external shell. The method of the invention has safe assembling, can ensure the consistency after the batteries are made into sets, and can well give full play of the efficacy of batteries, and the battery pack is suitable for being applied on the electric automobile in a large scale.

Description

technical field [0001] The invention belongs to the field of automobiles, and in particular relates to a method for manufacturing a lithium-ion battery pack for electric vehicles. Background technique [0002] In the existing electric vehicles, considering their cruising range and driving speed, when selecting the operating voltage of the motor, they generally use high voltage, ranging from 200V to 400V, and the highest voltage has reached 600V. In this way, due to the high supply voltage, the traditional battery pack manufacturing method has great potential safety hazards in the production process, and more batteries are connected in series and parallel, so it is difficult to guarantee the performance of the assembled batteries, which is not conducive to mass production. [0003] Therefore, there is a need for a lithium-ion battery pack for electric vehicles with safe assembly and stable performance after battery assembly. Contents of the invention [0004] The technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 王军张海滨
Owner 奇瑞新能源汽车股份有限公司
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