Integrated structure of ultra-thin lithium manganese battery

A lithium-manganese battery, ultra-thin technology, applied in the direction of battery electrodes, structural parts, battery pack parts, etc., can solve the problems of low specific energy density of batteries, difficulty in automatic production, etc., and achieve easy welding, good flexibility and stability sexual effect

Inactive Publication Date: 2017-01-11
中国兵器工业第二一三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) The double-layer positive electrode and one-layer negative electrode structure are adopted, and the positive electrode is pasted on the aluminum-plastic film; since the battery cell is not integrated, it is easy to break (short circuit) during bending, and the battery designed with this structure is more The energy density is low, and it is not easy to realize automatic production;
[0007] 2) Use a layer of positive electrode and a layer of negative electrode, and then paste them on the aluminum-plastic film. Also, because the battery cells are not integrated, it is easy to break (short circuit) during bending, and the battery with this structural design Low specific energy density, difficult to realize automatic production

Method used

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  • Integrated structure of ultra-thin lithium manganese battery
  • Integrated structure of ultra-thin lithium manganese battery
  • Integrated structure of ultra-thin lithium manganese battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: CP042529 preparation

[0038] The positive pole piece is prepared according to the method introduced in the invention patent (application number: 201310258416.9). The thickness of the pole piece is less than 0.4mm. After repeated rolling, the thickness of the pole piece is less than 0.15mm. Stamped by the stamping equipment into the required size of the positive pole piece (pole piece size: 22*21mm, notch size: 2*16mm), put it into the oven and bake at 200°C for 2h, then press figure 1 Weld the positive tab as shown (0.05*3mm nickel tab, the tab width is adjustable), spare.

[0039] stamping image 3 The punched copper foil shown (copper foil size: 21*20mm, notch size: 3*8mm), and weld the negative electrode tab (0.05*3mm nickel tab, tab width adjustable) at the corresponding position, through the roller Pressing a thin lithium strip into a punched copper foil, see Figure 5 ,spare.

[0040] The preparation of the diaphragm is to prepare a certain conc...

Embodiment 2

[0043] Embodiment 2: CP042229 preparation

[0044] The positive pole piece is prepared according to the method introduced in the invention patent (application number: 201310258416.9). The thickness of the pole piece is less than 0.4mm. After repeated rolling, the thickness of the pole piece is less than 0.15mm. Stamped by the stamping equipment into the required positive pole piece size (pole piece size: 22*19mm, notch size: 2*13mm), bake in an oven at 200°C for 2 hours, and then press figure 1 Weld the positive tab as shown (0.05*3mm nickel tab, the tab width is adjustable), spare.

[0045] stamping image 3 The punched copper foil shown (copper foil size: 21*17mm, notch size: 3*5mm), and the negative electrode tab (0.05*3mm nickel tab, adjustable tab width) is welded at the upper right position, through Rolling presses thin lithium strips into perforated copper foil, see Figure 5 ,spare.

[0046] The preparation of the diaphragm is to prepare a certain concentration (5%...

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Abstract

The invention provides an integrated structure of an ultra-thin lithium-manganese battery, including a positive electrode structure, a negative electrode structure, and a diaphragm structure. The positive electrode structure is coated with manganese dioxide, conductive agent and binder on the aluminum mesh; the negative electrode structure is made of ultra-thin lithium strip composite punched copper; the diaphragm structure is coated with an electrochemically stable adhesive on both sides of the diaphragm; the positive and negative electrodes The sheet and diaphragm are pasted together to form an integrated structure; the nickel / copper nickel-plated positive and negative tabs are packaged with an integrated structure. The invention fully utilizes the limited volume to obtain the maximum energy, is reasonable in design, simple in manufacture, easy to realize automatic production, and is suitable for preparing ultra-thin lithium-manganese batteries with a thickness of less than 0.45 mm. The ultra-thin lithium-manganese battery prepared with this structure has high energy density, good flexibility and stability, and the battery will not cause electrode dislocation to cause micro-short circuit when it is bent and deformed.

Description

technical field [0001] The invention relates to an ultra-thin lithium-manganese battery. Background technique [0002] Ultra-thin batteries are used in mobile electronic fields such as dynamic password smart cards (OTP), such as next-generation bank cards (OPT cards), financial cards, electronic storage cards, military secret pass cards, identity documents, electronic access credit cards, smart cards, and electronic chips etc. [0003] An OTP smart card (OTP) usually consists of a chip, a battery, and a display screen. The good information processing ability and confidentiality performance of OTP card make it the main direction of smart card development. OTP cards are suitable for occasions with high confidentiality requirements, such as financial cards, military secret order transfer cards, identity documents, etc. The standard thickness of the OTP card is only 0.76mm, and the preparation of ultra-thin batteries (thickness less than 0.45mm) has become one of the key tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058
CPCH01M4/131H01M4/622H01M4/625H01M50/449Y02E60/10Y02P70/50
Inventor 皮正杰李节宾李军升李磊孟庆英王静张宏皓杨朝勇
Owner 中国兵器工业第二一三研究所
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