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Battery body of lithium battery and prepared first lithium battery

A technology of lithium batteries and battery cores, applied in the field of lithium primary batteries, can solve problems such as poor discharge performance, high heat generation, uneven current density distribution, etc., achieve great promotion value and solve the effect of short circuit

Inactive Publication Date: 2016-11-09
HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery cell is composed of overlapping pole pieces. Due to the misalignment of the positive and negative electrode pieces and the diaphragm, the battery using this battery cell will have uneven current density distribution during use, poor discharge performance and Bad phenomena such as high heat generation
In addition, the unstable contact between the separator of the battery cell and the pole piece will cause the battery to short circuit due to the contact between the positive and negative pole pieces during use.

Method used

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  • Battery body of lithium battery and prepared first lithium battery
  • Battery body of lithium battery and prepared first lithium battery
  • Battery body of lithium battery and prepared first lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The assembly method of the diaphragm bag containing the positive electrode sheet provided in this embodiment: as figure 1 As shown, after the diaphragm bag 1 is folded in half, the first positive electrode sheet 2 is encapsulated, wherein the reserved long end 3 of the diaphragm bag is longer than the reserved short end 4 by at least three length units of the positive electrode sheet, and the reserved long end 3 is longer than the reserved short end 4. The length can be flexibly reserved according to the capacity design of the battery. It is used for encapsulating the last negative electrode sheet 8. Starting from the first seal 5, place the second positive electrode sheet 2 and continue encapsulating. At this time, the diaphragm The bag 1 has been folded in half when encapsulating the first positive electrode sheet 2, and then the third positive electrode sheet 2 is placed on the second seal 5, and the encapsulation is continued. According to this method, the positive e...

Embodiment 2

[0022] Another assembly method of the diaphragm bag containing the positive electrode sheet provided in this embodiment is: figure 1 , after folding the diaphragm bag 1 in half to equal length, seal the first positive electrode sheet 2, start from the first seal mark 5, place the second positive electrode sheet 2, and continue to seal, at this time, the diaphragm bag 1 is The first positive electrode sheet 2 has been folded in half during encapsulation, and then the third positive electrode sheet 2 is placed on the second seal 5, and the encapsulation is continued. According to this method, the positive electrode sheet 2 required in the assembly process is packaged. After sealing, obtain a diaphragm bag containing the positive electrode sheet.

Embodiment 3

[0024] The assembly method of the lithium battery cell structure obtained by the embodiment 1 and the embodiment 2 provided in this embodiment is as follows figure 2 As shown, polyvinylidene fluoride 6 is applied around the upper seal of the first positive electrode sheet 2 of the diaphragm bag containing the positive electrode sheet, and the position corresponding to the first positive electrode sheet 2 is above the first positive electrode diaphragm bag 7 Put the first negative electrode sheet 8, fold and seal the first negative electrode sheet 8 with the first positive electrode diaphragm bag 7 and the second positive electrode diaphragm bag 7, and then place around the seal marks on both sides of the second positive electrode diaphragm bag 7 Apply polyvinylidene fluoride 6, fold and seal the second positive electrode diaphragm bag 7 and the third positive electrode diaphragm bag 7 in half, and seal the second negative electrode sheet 8 in half. According to this method, fo...

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Abstract

The invention relates to the field of a lithium battery and especially relates to a battery body of a lithium battery and a prepared first lithium battery. The battery body of the lithium battery comprises a diaphragm bag containing an anode piece and a cathode piece; the anode piece and the cathode piece are both polygons with at least one set of opposite edges in parallel; the diaphragm bag containing the anode piece is a foldable diaphragm bag containing the anode piece, formed after a diaphragm bag is folded and the anode piece is hotly packaged. The battery body of the lithium battery provided by the invention can flexibly reserve the length of the diaphragm according to the design for the battery capacity and the battery thickness in the assembling process of the diaphragm bag containing the anode piece, so that the problems of easiness in short-circuit, unstable contact of pole pieces and poor battery performance in the assembling process of the battery are solved.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium battery cell body and a obtained lithium primary battery. Background technique [0002] Due to the advantages of high energy density, high open circuit and discharge voltage, good low temperature performance and long storage life, lithium primary batteries are gradually replacing zinc manganese, alkaline manganese, silver oxide and other primary batteries. With the development of lithium-ion battery technology, its cost performance has been continuously improved, and it has been widely used in various industries. However, the performance optimization of lithium primary batteries can not only be achieved by optimizing the electrolyte and optimizing the screening of lithium salts that match the electrolyte. More importantly, the battery should have a cell with excellent structure and stability. The battery cell is composed of overlapping pole pieces. Due to the misal...

Claims

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Application Information

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IPC IPC(8): H01M6/16
CPCH01M6/16
Inventor 何献文潘文硕许石桦
Owner HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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