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A kind of power battery ceramic sealed connector and preparation method thereof

A ceramic sealing and power battery technology, which is applied in the field of ceramic metal materials, can solve the problems that the battery cannot be connected as one, the sealing strength is high, and the metal material has no insulation performance, so as to broaden the welding production and use process conditions and improve the bending resistance Strength and tensile strength, effect of high-tight welded connection

Active Publication Date: 2017-01-25
LOUDI ANTAEUS ELECTRONICS CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, ceramics are made of 95Al 2 o 3 , high ceramic brittleness, density 2 , the crystal grains are relatively large, generally between 15mm and 30mm, so the flexural strength cannot be applied to high-tech requirements
Because the battery connection adopts the ceramic sealing method, one side is welded with copper pillars, and the other side is sealed with aluminum sheets, the sealing strength is high, and the sealing of aluminum sheets is at the advanced level in China, and the existing metallization technology cannot meet this requirement
The power battery connections in the prior art are all welded with T2 copper foil or fastened with screws and snap rings. The contact surface or the entire surface is tinned, and then a soft connection is made through special treatment. This connection method of pure metal materials , another electrode is needed to be connected with this metal connecting plate, and the positive and negative electrodes of the battery cannot be completely connected together, which occupies a relatively large space. Each electric vehicle uses more than 100 sets of batteries, and the power reaches more than 100 watts. Resistance loss of power will affect its output power, which will reduce the mileage of the vehicle and make it impossible to complete the tight assembly of the power battery pack, and the metal material has no insulation performance, and it will be affected by oxidation after long-term use
Due to various working environment problems of power batteries, high temperature and vibration, the stability and reliability of the connection is very important. In the high current operation of the battery packs connected in series, the reliability of the connection is an important standard to ensure the safe use and service life of the battery , Screws, clasps, glass packages, etc., all have certain connection space limitations, and have been separated when vibration occurs, affecting the safe operation of power equipment

Method used

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  • A kind of power battery ceramic sealed connector and preparation method thereof
  • A kind of power battery ceramic sealed connector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Ingredients synthesis: Weigh Al 2 o : 20 parts and ZrO 2 1 part, modifier MgO is 0.21 part, sintering aid CaCO 3 0.84 parts, mix the ingredients and put them into a baking oven for baking. The baking temperature is 150°C and the baking time is 15 hours. Then put them into a ball mill for ball milling for 24 hours to obtain uniformly refined mixed raw materials. The particle size Reach 3-3.5μm;

[0026] (2) Pre-burning: Pre-burn in the air at a temperature of 4°C per minute to 1150°C for 2 hours, then cool down with the furnace, then crush the resulting mixed raw materials, perform a second ball mill, pass through a 80-mesh sieve and then dry , making Al 2 o 3 Powder;

[0027] (3) Granulation: Al 2 o 3 Add 10% polyvinyl alcohol to the powder, and use a granulator to granulate;

[0028] (4) Dry pressing: use a press to perform dry pressing under 6MPa to obtain ceramic blanks;

[0029] (5) Sintering: Sinter the ceramic blank, control the temperature at 37°C-...

Embodiment 2

[0036] (1) Ingredients synthesis: Weigh Al 2 o : 40 parts and ZrO 2 2 parts, modifier MgO is 0.63 parts, sintering aid CaCO 3 1.89 parts, mix the ingredients and put them in a baking oven for baking. The baking temperature is 150°C and the baking time is 15 hours. Then put them into a ball mill for ball milling for 24 hours to obtain uniformly refined mixed raw materials. The particle size Reach 3-3.5μm;

[0037] (2) Pre-burning: Pre-burn in the air at a temperature of 4°C per minute to 1150°C for 2 hours, then cool down with the furnace, then crush the resulting mixed raw materials, perform a second ball mill, pass through a 80-mesh sieve and then dry , making Al 2 o 3 Powder;

[0038] (3) Granulation: Al 2 o 3 Add 10% polyvinyl alcohol to the powder, and use a granulator to granulate;

[0039] (4) Dry pressing: use a press to perform dry pressing under 6MPa to obtain ceramic blanks;

[0040] (5) Sintering: Sinter the ceramic blank, control the temperature at 37°C-...

Embodiment 3

[0047] (1) Ingredients synthesis: Weigh Al 2 o : 80 parts and ZrO 2 4 parts, modifier MgO is 1.68 parts, sintering aid CaCO 3 4.2 parts, mix the ingredients and put them in a baking oven for baking. The baking temperature is 150°C and the baking time is 15 hours. Then put them into a ball mill for ball milling for 24 hours to obtain uniformly refined mixed raw materials. The particle size Reach 3-3.5μm;

[0048] (2) Pre-burning: Pre-burn in the air at a temperature of 4°C per minute to 1150°C for 2 hours, then cool down with the furnace, then crush the resulting mixed raw materials, perform a second ball mill, pass through a 80-mesh sieve and then dry , making Al 2 o 3 Powder;

[0049] (3) Granulation: Al 2 o 3 Add 10% polyvinyl alcohol to the powder, and use a granulator to granulate;

[0050] (4) Dry pressing: use a press to perform dry pressing under 6MPa to obtain ceramic blanks;

[0051] (5) Sintering: Sinter the ceramic blank, control the temperature at 37°C-3...

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Abstract

The invention discloses a power battery ceramic sealed connector and a preparation method thereof. The connector includes a ceramic part, a copper column (positive pole) and an aluminum plate (negative pole). The components of the ceramic part and the connector include main materials Al2O3 and ZrO2, modifiers MgO, sintering aid CaCO3, the mass ratio of Al2O3 and ZrO2 is 20:1, the proportion of the modifier MgO is 1%-2% of the total amount of Al2O3 and ZrO2, the sintering aid CaCO3 The ratio is 4%-5% of the total amount of Al2O3 and ZrO2. The invention is prepared by doping 0.12wt% MgO modification and firing technology adjustment scheme. The invention greatly improves the flexural strength and tensile strength, improves the compactness and toughness of ceramics, and broadens the production and use process conditions.

Description

technical field [0001] The invention belongs to the field of ceramic metal materials, and in particular relates to a power battery ceramic sealed connector and a preparation method thereof. Background technique [0002] Sealing of ceramic and metal materials is a multidisciplinary and comprehensive technology. It is widely used in national economic fields such as aerospace, aviation, electric power, electronics, machinery, chemical industry, petroleum, mining and automobiles, as well as national defense and military fields. And the key technology of high quality components. As a key component material in the electric vehicle battery and battery connection technology, the battery connector ceramic material has excellent flexural strength and extremely high tensile strength, and has great application value in the field of electric vehicles. [0003] At present, ceramics are made of 95Al 2 o 3 , high ceramic brittleness, density <3.65g / cm 2 , the crystal grains are relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/20C04B35/10C04B35/622C04B41/88H01M50/522
CPCC04B35/10C04B35/622C04B41/88H01M50/502Y02E60/10
Inventor 康丁华
Owner LOUDI ANTAEUS ELECTRONICS CERAMICS