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Winding type multi-lug battery and terminal

A wound-type, multi-tab technology, applied in non-aqueous electrolyte batteries, electrolyte battery manufacturing, secondary battery repair/maintenance, etc., can solve problems such as difficult to control, difficult to detect, uneven impedance distribution, etc., to achieve good monitoring, The effect of preventing safety accidents

Pending Publication Date: 2018-07-27
安普瑞斯(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of uneven distribution of current, voltage and impedance inside the existing winding battery, which are difficult to detect and control by designing and manufacturing a winding multi-tab battery and terminal

Method used

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  • Winding type multi-lug battery and terminal
  • Winding type multi-lug battery and terminal

Examples

Experimental program
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Effect test

preparation example Construction

[0043] Preparation of the positive pole piece: the positive active material lithium cobaltate, the binder polyvinylidene fluoride (PVDF) and the conductive agent Super-P are added to N-methylpyrrolidone (NMP) according to the weight ratio of 96:2:2 and stirred evenly The slurry is made into positive electrode slurry; the positive electrode slurry is double-coated on the positive electrode current collector, and the positive electrode sheet is obtained after drying, compacting, slitting, cutting, and welding tabs.

[0044]Preparation of negative electrode sheet: Negative electrode active materials artificial graphite, styrene-butadiene rubber (SBR), sodium carboxymethyl cellulose (CMC), add deionized water according to the ratio of 95:2.5:2.5 and stir to make negative electrode slurry; The negative electrode slurry is double-coated on the negative electrode current collector, and the negative electrode sheet is obtained after drying, compacting, slitting, cutting, and welding ta...

Embodiment 1

[0050] Pole piece structure such as figure 2 As shown, it includes a first electrode sheet 1, a first negative tab 11, a second negative tab 12, a second electrode sheet 2, a first positive tab 21, and a second positive tab 22. The first negative tab 11 and the second negative tab 12 are respectively located at both ends of the first electrode sheet 1 , and the first positive tab 21 and the second positive tab 22 are respectively located at both ends of the second electrode sheet 2 . figure 2 The electrode and separator of the structure are wound to form a core such as image 3 As shown, the winding core can be obtained by putting the winding core in aluminum-plastic film for packaging, injecting liquid, and forming Figure 4 The wound multi-tab cell shown.

Embodiment 2

[0052] Pole piece structure such as Figure 5 As shown, it includes a first electrode sheet 1, a first negative tab 11, a second negative tab 12, a second electrode sheet 2, a first positive tab 21, and a second positive tab 22. The first negative tab 11 and the second negative tab 12 are respectively located at both ends of the first electrode sheet 1 , and the first positive tab 21 and the second positive tab 22 are respectively located at both ends of the second electrode sheet 2 . Figure 5 The electrode and separator of the structure are wound to form a core such as image 3 As shown, the winding core can be obtained by putting the winding core in aluminum-plastic film for packaging, injecting liquid, and forming Figure 6 The wound multi-tab cell shown. Figure 6 The wound multi-tab battery shown is assembled and matched, and can be obtained as follows Figure 10 terminal as shown. This terminal includes Figure 6 Shown are batteries, at least two battery connectors...

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Abstract

The invention discloses a winding type multi-lug lithium-ion secondary battery and a terminal. The battery is provided with two or more than two positive lugs and two or more than two negative lugs, wherein one pair of positive / negative lugs have a charge and discharge current transmission effect of a traditional lug; other positive and negative lugs have auxiliary effects including voltage innerresistance monitoring and current fine adjustment effects. The winding type multi-lug lithium-ion secondary battery disclosed by the invention has the main advantages that in a full-service-life utilization process of the battery, the inner resistance distribution of each position on a pole piece of the battery is detected in a whole process and the inner resistance, safety and service life conditions of the battery can be monitored better; safety accidents are prevented from occurring. The winding type multi-lug lithium-ion secondary battery is especially applicable to batteries with relatively long pole piece and relatively large pole piece area, and a utilization condition of large-current charge and discharge. The invention also discloses the terminal using the lithium-ion secondary battery and is used for controlling, protecting, balancing and repairing the battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion secondary batteries, in particular to a wound-type multi-tab lithium-ion secondary battery. Background technique [0002] Lithium-ion secondary batteries have the advantages of high voltage and high energy density, and are widely used in power supplies for consumer electronics, energy storage systems, and power systems. In recent years, with the demand for energy storage, electric vehicles and other electrical equipment requiring large capacity, high current and high rate charge and discharge, the capacity of lithium-ion secondary batteries has continued to increase, and batteries of 20Ah, 50Ah and even 100Ah and 200Ah have appeared. Winding is a battery manufacturing method with high manufacturing efficiency and simple structure. When charging and discharging, the current, voltage, and impedance distribution inside the lithium-ion battery is uneven, and the unevenness will be particularly ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/42
CPCH01M10/058H01M10/42Y02E60/10Y02P70/50
Inventor 翟传鑫严涛张明慧徐子福
Owner 安普瑞斯(无锡)有限公司
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