Battery cell, battery module and battery pack

A cell, winding core technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve the problems of short circuit of positive and negative current collectors, thermal runaway of cells, etc.

Pending Publication Date: 2022-08-09
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper foil and aluminum foil have excellent electrical conductivity, but when the battery is damaged by acupuncture, extrusion, etc., the positive and negative current collectors are easy to short circuit, causing thermal runaway of the battery cell

Method used

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  • Battery cell, battery module and battery pack
  • Battery cell, battery module and battery pack
  • Battery cell, battery module and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-15

[0052] Examples 1-15 respectively provide 15 kinds of cells (battery 1-15), the thickness A of the insulating support layer 101 of the 15 kinds of cells, the thickness B of the conductive layer 103 and the ratio of the capacity of the cell to the surface area of ​​the cell are The relationship among the three is shown in Table 1. At the same time, the insulating support layer 101 of the positive current collector and the negative current collector of the 15 types of cells is made of PET, the conductive layer 103 of the positive current collector is made of aluminum foil, and the material of the negative current collector conductive layer 103 is copper foil. The thickness of the positive electrode active material layer formed after the positive electrode active material is rolled is 80-200um, the active particles of the positive electrode active material are all nickel-cobalt-manganese ternary materials, the thickness is 80-200um, and the single-sided density is 120-300g / m 2 , ...

experiment example 1

[0065] The 15 types of cells provided in Examples 1-15, 4 types of cells provided in Comparative Examples 1-4, and 5 types of cells provided in Comparative Examples 5-10 were subjected to acupuncture experiments according to the procedures in the national standard GBT31485. The test conditions are: : 25±5℃, fully charged to 4.2V, 3mm steel needle, 25mm / s speed at the center of the large surface of the cell, and acupuncture experiments are carried out along the direction of the large surface of the cell perpendicular to the pole piece, and the experimental results are shown in the table after 1 hour of observation 4 shown.

[0066] Table 4. Acupuncture experimental data of cells

[0067] type Acupuncture test results Cell 1# No smoke, no fire, no explosion Cell 2# No smoke, no fire, no explosion Cell 3# No smoke, no fire, no explosion Cell 4# No smoke, no fire, no explosion Cell 5# No smoke, no fire, no explosion Cell 6# No ...

experiment example 2

[0070]The 15 types of cells provided in Examples 1-15, 4 types of cells provided in Comparative Examples 1-4, and 5 types of cells provided in Comparative Examples 5-10 were subjected to temperature rise and voltage tests under the same conditions. Among them, the charging strategy is: at an ambient temperature of 25±5°C, the cell is wrapped with thermal insulation cotton made of 10mm thick thermal insulation glass wool, and charged to 4.1V at a constant current of 100A1C, and left for 30min; at the same time, the temperature rise The recording conditions are that during the charging process, a multi-channel thermometer is used to monitor the temperature of the battery cell, and one section of the temperature sensing line is connected to the multi-channel thermometer, and the other end is attached to the center point of the large surface of the battery cell. 1s to record the cell temperature. The condition of voltage recording is to use a voltage test device to monitor the vol...

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Abstract

The invention discloses a battery cell, a battery module and a battery pack, and relates to the technical field of batteries. The battery cell comprises a shell, a roll core and an electrolyte, the roll core is formed by laminating or winding a positive plate, an isolating membrane and a negative plate which are arranged in a laminated manner, the ratio of the capacity of the battery cell to the surface area of the battery cell is C, and the unit is Ah / cm < 2 >; the positive plate comprises a positive current collector, the negative plate comprises a negative current collector, the positive current collector and / or the negative current collector are / is a composite current collector, the composite current collector comprises an insulating support layer and a conductive layer at least arranged on one side of the insulating support layer, the thickness of the insulating support layer is A, the unit is mu m, the thickness of the conductive layer is B, and the unit is mu m; and the thickness A of the insulating supporting layer, the thickness B of the conductive layer and the ratio C of the capacity of the battery cell to the surface area of the battery cell satisfy 3 < = A / (10 * B * C) < = 80. The battery cell has the advantages of high energy density and high safety performance.

Description

technical field [0001] The present invention relates to the technical field of batteries, in particular, to a battery cell, a battery module and a battery pack. Background technique [0002] At present, the positive electrode current collector used in the pole piece of the lithium ion cell is aluminum foil, and the negative electrode current collector is copper foil. Copper foil and aluminum foil have excellent electrical conductivity, but when the battery is damaged by acupuncture, extrusion, etc., the positive and negative current collectors are easily short-circuited, causing thermal runaway of the cell. [0003] In view of this, the present invention is proposed. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a battery cell, a battery module and a battery pack with high energy density and high safety performance. [0005] The present invention is realized in this way: [0006] In a first aspect, the present invention provides a ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/64H01M4/66H01M10/0525
CPCH01M4/667H01M4/64H01M4/62H01M10/0525Y02P70/50
Inventor 於洪将
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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