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A kind of normal temperature curing conductive adhesive and its process method for connecting rechargeable battery pack

A room temperature curing and process technology, applied in battery pack parts, conductive adhesives, circuits, etc., can solve the problems of loosening, increasing the weight of the battery pack, reducing reliability, etc., to avoid open circuit, increase heat dissipation function, maintain The effect of welding reliability

Active Publication Date: 2019-03-01
晶丰电子封装材料(武汉)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In practical applications, it is also possible to use potting glue to bond and reinforce the battery, pole piece and box after the laser connects the battery and the pole piece. Although this is a feasible technical solution, a large amount of potting glue increases the weight of the battery pack. In addition, the battery, pole piece and box can also be reinforced by mechanical fixing, but the vibration of the car will cause loosening, resulting in reduced reliability

Method used

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  • A kind of normal temperature curing conductive adhesive and its process method for connecting rechargeable battery pack
  • A kind of normal temperature curing conductive adhesive and its process method for connecting rechargeable battery pack
  • A kind of normal temperature curing conductive adhesive and its process method for connecting rechargeable battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0039] According to Table 1, the specific composition of the room temperature curing conductive adhesive in Example 1 of the present invention can be obtained as follows: the conductive adhesive includes mixture I and mixture II with a mass ratio of 20:1;

[0040] Mixture I includes the following components in mass percentage: 14.3% epoxy resin A, 4.1% epoxy diluent B, 0.4% epoxy crosslinking agent C, 6.1% silicone D, 75.1% silver powder with a particle size satisfying D50>7μm F; wherein: epoxy resin A is bisphenol A epoxy resin, epoxy diluent B is polyisopropylene glycol diglycidyl ether epoxy resin, and epoxy crosslinking agent C is pentaerythritol tetraglycidyl ether epoxy resin. Mix the above components uniformly to obtain mixture I.

[0041] Mixture II includes the following components in mass percentage: 51.2% 2-ethyl-4-methylimidazole (2E4MI), 4.8% 1-methylimidazole (AIM-1), 4% silicone, 40% N-aminoethyl Alkylpiperazine (AEP). Mix the above components uniformly to obt...

Embodiment 2

[0044] According to Table 1, the specific composition of the room temperature curing conductive adhesive of Example 2 of the present invention can be obtained as follows: the conductive adhesive includes mixture I and mixture II with a mass ratio of 20:1;

[0045] Mixture I includes the following components in mass percentage: 14.3% epoxy resin A, 4.1% epoxy diluent B, 0.4% epoxy crosslinking agent C, 6.1% silicone D, 75.1% silver powder with a particle size satisfying D50>7μm F; wherein: epoxy resin A is bisphenol A epoxy resin, epoxy diluent B is polyisopropylene glycol diglycidyl ether epoxy resin, and epoxy crosslinking agent C is pentaerythritol tetraglycidyl ether epoxy resin. Mix the above components evenly to obtain mixture I

[0046] Mixture II includes the following components in mass percentage: 85.3% 2-ethyl-4-methylimidazole (2E4MI), 8% 1-methylimidazole (AIM-1), 6.7% silicone. Mix the above components uniformly to obtain mixture II.

[0047] Table 1 Composition...

Embodiment 3

[0050] According to Table 1, the specific composition of the room temperature curing conductive adhesive of Example 3 of the present invention can be obtained as follows: the conductive adhesive includes mixture I and mixture II with a mass ratio of 15:1;

[0051] Mixture I includes the following components in mass percentage: 14.3% epoxy resin A, 4.1% epoxy diluent B, 0.4% epoxy crosslinking agent C, 6.1% silicone D, 75.1% silver powder with a particle size satisfying D50>7μm F; wherein: epoxy resin A is bisphenol A epoxy resin, epoxy diluent B is polyisopropylene glycol diglycidyl ether epoxy resin, and epoxy crosslinking agent C is pentaerythritol tetraglycidyl ether epoxy resin. Mix the above components uniformly to obtain mixture I.

[0052]Mixture II includes the following components in mass percentage: 28.24% 2-ethyl-4-methylimidazole (2E4MI), 2.82% 1-methylimidazole (AIM-1), 2.27% silicone, 66.67% particle size meeting D50 >7μm silver powder. Mix the above components...

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Abstract

The invention discloses a normal temperature curing conductive adhesive and a process method for connecting a rechargeable battery pack. The conductive adhesive is used for the connection of the electrodes of the rechargeable battery pack and the reinforcement of the battery pack, so that it can adapt to vibration and impact under use conditions , the room temperature curing conductive adhesive contains epoxy resin, epoxy diluent, epoxy curing agent, silicone auxiliary agent, and silver powder with a mass fraction of 30-90% and D50>7 μm. The present invention adopts room temperature curing conductive adhesive as the connection and reinforcement of the negative electrode of the battery, which can be called the "negative electrode cold welding" process, which can not only maintain the welding reliability of heat welding, but also not apply external heat during the welding process, and avoid damage to the battery structure. Direct damage or invisible internal damage, so as to avoid the influence of external heat on the conductor properties.

Description

technical field [0001] The invention relates to the field of rechargeable batteries, in particular to a process method for curing conductive adhesive at room temperature and connecting a rechargeable battery pack. Background technique [0002] The battery pack used for automobiles or energy storage is composed of thousands of rechargeable batteries (rechargblebattery). The positive and negative electrodes of each battery are welded with a special laser to connect wires and fuses. This laser welding method can generate enough energy locally to weld the wires on the electrodes without causing the battery itself to be overheated, because rechargeable batteries are sensitive to heat, such as: conventional lithium batteries, which can withstand 50-90°C for several hours. The lithium battery left in the car in summer may explode due to overheating. [0003] Laser welding is currently the method commonly used in the world to weld battery pack connections. However, due to the ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J9/02C09J1/00C09J11/08C09J11/06H01M2/26H01M50/531
CPCC09J1/00C09J9/02C09J11/06C09J11/08H01M50/531Y02E60/10
Inventor 王茂汪波杨钢
Owner 晶丰电子封装材料(武汉)有限公司
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