Flexible package lithium carbon fluoride primary battery

A lithium fluoride carbon and flexible packaging technology, which is applied in the field of lithium fluoride carbon primary batteries, can solve problems such as increased polarization, low shell strength, and increased internal temperature of the battery, so as to broaden the application market and application fields, and overcome the inability to The effect of power discharge and uniform distribution of current density

Pending Publication Date: 2020-12-04
TIANJIN JUYUAN NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional lithium carbon fluoride primary batteries with a square flexible packaging structure, due to the low strength of the shell, cannot effectively restrain the expansion of the pole piece. increase, the battery capacity cannot be effectively utilized
On the other hand, when the lithium fluoride battery is discharged at a high rate, it generates a large amount of heat, which increases the internal temperature of the battery (up to about 100°C). The contact between them is worse, and the polarization phenomenon is further aggravated, resulting in a lower discharge platform, which is one of the bottlenecks that the lithium fluoride primary battery cannot discharge at high power.

Method used

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  • Flexible package lithium carbon fluoride primary battery
  • Flexible package lithium carbon fluoride primary battery
  • Flexible package lithium carbon fluoride primary battery

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A wing-shaped soft-packed square lithium carbon fluoride primary battery with tabs at both ends of the battery. It is composed of three cylindrical pole groups with a diameter of 18mm connected in parallel. The design capacity is 7.8Ah. The schematic diagram of its shape and structure is as follows: figure 1 As shown, the schematic diagram of its internal structure is shown in figure 2 shown. figure 1 Among them, the casing 1 is made of aluminum-plastic film with a thickness of 110 μm; the width of the sealing edge 2 of the casing is about 4mm; the size of the positive electrode with glue tab 3 and the negative electrode with glue tab 5 is 0.2mm thick × 40mm wide; The specifications of the heat capacity glue 4 with glue tabs on the positive electrode and the heat capacity glue 6 with glue tabs on the negative electrode are 0.2mm thick×46mm wide×8mm high.

[0029] figure 2 Among them, the specifications of the cylindrical pole group are: diameter 18mm×height 60mm, th...

Embodiment 2

[0037] A soft-packed square lithium carbon fluoride primary battery with tabs at the same end of the battery. It is composed of three cylindrical pole groups with a diameter of 18mm connected in parallel. The design capacity is 7.8Ah. The schematic diagram of its appearance and structure is as follows image 3 As shown, the schematic diagram of its internal structure is shown in Figure 4 shown. image 3 Among them, the casing 1 is made of aluminum-plastic film with a thickness of 110 μm; the width of the sealing edge 2 of the casing is about 4mm; the size of the positive electrode with glue tab 3 and the negative electrode with glue tab 5 is 0.2mm thick × 20mm wide; the positive electrode The specifications of the heat capacity glue 4 with glue tabs and the heat capacity glue 6 with glue tabs on the negative electrode are 0.2mm thick×26mm wide×8mm high.

[0038] Figure 4 Among them, the specifications of the cylindrical pole group are: diameter 18mm×height 60mm, the cylind...

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Abstract

The invention discloses a flexible package lithium carbon fluoride primary battery, which is composed of a plurality of cylindrical pole groups, a non-aqueous electrolytic solution, a glue-containingelectrode lug and a soft shell, wherein the plurality of cylindrical pole groups are connected in parallel, each cylindrical pole group is of a multi-electrode lug or foil-electrode lug structure andcan be used for quickly guiding flow and conducting heat, positive and negative electrode sheets and a diaphragm are tight and wound so as to achieve tight contact between positive and negative electrodes and the diaphragm in the whole discharge process, the F/C atomic ratio in carbon fluoride is in gradient distribution in material particles, and the F/C atomic ratio of the outermost layer is close to 0, so that the problem that a conventional lithium carbon fluoride battery cannot discharge at high power is solved. According to the invention, the square lithium carbon fluoride battery adoptsthe soft package light shell, has the characteristics of high specific energy and high safety, does not deform and obviously expand in the whole discharge process, and does not need to adopt a high-strength shell and a clamp for limitation in the use process, so that the difficulty of combined application is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of lithium carbon fluoride primary battery, in particular to a power type square structure soft package lithium carbon fluoride primary battery. Background technique [0002] Lithium / carbon fluoride (Li / CF x ) battery is a solid positive lithium primary battery that is first used as a commodity. Because of its theoretical mass specific energy of 2180Wh / kg, which is the highest in the positive electrode series, it has good high temperature performance and safety performance, high and stable discharge platform, and low self-discharge rate, and has always received great attention. Compared with metal shell batteries, soft-packed lithium fluoride batteries have obvious advantages in specific energy, flexible size, and excellent safety performance due to their light-weight shells. . [0003] During the discharge process of the lithium carbon fluoride primary battery, the positive electrode active material carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16H01M2/26H01M2/02
CPCH01M6/16
Inventor 阳晓霞白宝生冯辉段征
Owner TIANJIN JUYUAN NEW ENERGY TECH CO LTD
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