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 perform

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

Example Embodiment

[0019] Example 1

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

Example Embodiment

[0021] Example 2

[0022] Another assembly method of the separator bag containing the positive electrode sheet provided in this embodiment is as follows: figure 1 , after the diaphragm bag 1 is folded in half, the first positive electrode sheet 2 is encapsulated, and the second positive electrode sheet 2 is placed with the first sealing mark 5 as the starting point, and the encapsulation is continued. At this time, the diaphragm bag 1 is facing the The first positive electrode sheet 2 has been folded in half when encapsulating, and then a third positive electrode sheet 2 is placed on the second sealing mark 5, and the encapsulation is continued. According to this method, the positive electrode sheet 2 required in the assembly process is packaged. After sealing, a separator bag containing a positive electrode sheet was obtained.

Example Embodiment

[0023] Example 3

[0024] The assembly method of the lithium battery cell structure obtained in Example 1 and Example 2 provided in this example is as follows: figure 2 As shown, smear polyvinylidene fluoride 6 around the upper seal mark of the first positive electrode sheet 2 of the separator bag containing the positive electrode sheet, and the first positive electrode separator bag 7 corresponds to the position of the first positive electrode sheet 2 Put on the first negative electrode sheet 8, the first positive electrode diaphragm bag 7 and the second positive electrode diaphragm bag 7 are folded and sealed with the first negative electrode sheet 8, and then around the seal marks on both sides of the second positive electrode diaphragm bag 7 Apply polyvinylidene fluoride 6, the second positive electrode separator bag 7 and the third positive electrode separator bag 7 are folded and sealed with the second negative electrode sheet 8. According to this method, the negative e...

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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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