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Normal-temperature cured conductive adhesive and process method thereof for connecting rechargeable battery pack

A technology of room temperature curing and process method, which is applied to battery pack parts, conductive adhesives, circuits, etc. It can solve the problems of reduced reliability, looseness, and increased weight of battery packs, so as to avoid circuit breakage, increase heat dissipation, and maintain Effect of Soldering Reliability

Active Publication Date: 2017-12-08
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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  • Normal-temperature cured conductive adhesive and process method thereof for connecting rechargeable battery pack
  • Normal-temperature cured conductive adhesive and process method thereof for connecting rechargeable battery pack
  • Normal-temperature cured conductive adhesive and process method thereof for connecting rechargeable battery pack

Examples

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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 cured conductive adhesive and a process method thereof for connecting rechargeable battery packs. The conductive adhesive is used for communicating rechargeable battery pack electrodes and reinforcing battery packs, and then the rechargeable battery pack electrodes and the battery packs can endure vibration and impact under use conditions. The normal-temperature cured conductive adhesive comprises an epoxy resin, an epoxy diluent, an epoxy curing agent, silicone aids and 30-90% by mass of silver powder of which D50 is greater than 7mu m. When being applied to connection and reinforcement of battery cathodes, the normal-temperature cured conductive adhesive disclosed by the invention can be called as a 'cathode cold welding' process, both the welding reliability of hot welding is maintained, and no external heat is needed in the welding process, direct damage or hidden damage of battery structures is avoided, and thus the properties of conductors are not affected by external heat.

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 Applications(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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