# US 2017/0288279 A1 · Secondary battery and method for manufacturing the same

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- Number: US 2017/0288279 A1
- Document ID: US20170288279A1
- Status: Published application
- Kind: A1
- Application number: 15/246,737
- Filed: 2016-08-25
- Published: 2017-10-05
- Earliest claimed: 2016-03-31
- Assignees: Dongguan Amperex Technology Limited
- Applicants: Dongguan Amperex Technology Limited
- Inventors: Bangsheng MING; Deqiang ZHAO; Wei GAO; Ying WANG; Chunjiang XIANG; Shaoyu CHEN
- Web page: https://patentgrep.com/patent/US20170288279A1

## CPC

- C09J 163/00: Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C08G 18/4825: {Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/73: acyclic
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08G 18/7664: {containing alkylene polyphenyl groups}
- C08G 18/7671: {containing only one alkylene bisphenyl group}
- C09J 1/00: Adhesives based on inorganic constituents
- C09J 9/00: Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks (C09J7/00 takes precedence)
- C09J 11/04: inorganic
- C09J 123/06: Polyethylene
- C09J 123/0853: {Vinylacetate}
- C09J 175/04: Polyurethanes
- C09K 5/14: Solid materials, e.g. powdery or granular
- H01M 50/581: in response to temperature
- C08G 2170/20: Compositions for hot melt adhesives
- C08K 3/04: Carbon
- C08K 3/08: Metals
- C08K 3/22: of metals
- C08K 3/28: Nitrogen-containing compounds
- C08K 3/34: Silicon-containing compounds
- C08K 3/36: Silica
- C08K 3/38: Boron-containing compounds
- C08K 2003/023: {Silicon}
- C08K 2003/0806: {Silver}
- C08K 2003/222: {Magnesia, i.e. magnesium oxide}
- C08K 2003/2227: {of aluminium}
- C08K 2003/2231: {of tin}
- C08K 2003/382: {and nitrogen}
- C08K 2003/385: {Binary compounds of nitrogen with boron}
- C09J 153/02: Vinyl aromatic monomers and conjugated dienes
- C09J 177/00: Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09J179/06; based on polyamide-imides C09J179/08); Adhesives based on derivatives of such polymers
- C09J 177/12: Polyester-amides
- H01M 2200/10: Temperature sensitive devices
- H01M 2200/103: Fuse
- H01M 2200/106: PTC
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The embodiment of the present application relates to the field of Li-ion battery and, in particular, to a secondary battery. The secondary battery includes a cell, a safety component fixed on the cell and thermal conductive adhesive provided between the cell and the safety component, the thermal conductive adhesive contains at least one of hot melt adhesive, silica gel binder or epoxy resin binder, and thermal conductive filling material. The thermal conductive adhesive in the secondary battery performs good thermal conductivity and adhering property, which can stably adhere the safety component with the cell, meanwhile transferring, via the thermal conductive adhesive, heat of the cell to the safety component rapidly, so that the safety component cuts off the circuit to protect the cell during overcharge, thereby avoid situations that the thermal conductive adhesive is separated from the cell due to cell inflation and deformation.

## Claims

### Claim 1

A secondary battery comprising:
a cell, a safety component fixed on the cell and thermal conductive adhesive provided between the cell and the safety component, wherein the thermal conductive adhesive comprises at least one of hot melt adhesive, silica gel binder or epoxy resin binder, and further comprises thermal conductive filling material.

### Claim 2 (depends on 1)

The secondary battery according to claim 1, wherein the thermal conductive filling material is selected from at least one of metal, metallic oxide, carbon material, nitride, carbide, silicon material; the metal is preferably selected from at least one of silver, copper or tin; the metallic oxide is preferably selected from at least one of aluminium oxide, magnesium oxide, zinc oxide, titanium oxide, SnOy; the carbon material is preferably selected from at least one of hard carbon, soft carbon, mesocarbon microbead, carbon nano tube, graphite, graphene; the nitride is preferably selected from at least one of silicon nitride, aluminium nitride, boron nitride, titanium nitride; the carbide is preferably selected from at least one of silicon carbide, tungsten carbide; the silicon material is preferably selected from at least one of Si, SiOx; wherein, 0<x<=2, 0<y<=2.

### Claim 3 (depends on 1)

The secondary battery according to claim 1, wherein thermal conductive coefficient of the thermal conductive filling material is 1 W/mK˜10000 W/mK, preferably 20 W/mK˜6000 W/mK.

### Claim 4 (depends on 1)

The secondary battery according to claim 1, wherein particle size of the thermal conductive filling material is 1 nm˜100 μm, or, the thermal conductive filling material comprises thermal conductive filling material particle with particle size larger than 1 nm but smaller than 1 μm, and thermal conductive filling material particle with particle size larger than 1 μm but smaller than 50 μm.

### Claim 5 (depends on 1)

The secondary battery according to claim 1, wherein the thermal conductive filling material occupies 1%˜99% weight of the thermal conductive adhesive, preferably 20%˜75%.

### Claim 6 (depends on 1)

The secondary battery according to claim 1, wherein the hot melt adhesive is selected from at least one of polyurethane hot melt adhesive, EVA hot melt adhesive, polyamide hot melt adhesive, polyurethane hot melt adhesive, polyester hot melt adhesive, polyethylene hot melt adhesive, polyesteramide hot melt adhesive, styrene type thermoplastic elastomer; preferably, the polyurethane hot melt adhesive is selected from isocyanate polyurethane prepolymer; preferably, the styrene type thermoplastic elastomer is selected from styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer;
the silica gel binder is selected from silica gel;
the epoxy resin binder comprises epoxy resin.

### Claim 7 (depends on 1)

The secondary battery according to claim 1, wherein the thermal conductive adhesive further comprises at least one of tackifier, antioxygen, viscosity modifier.

### Claim 8 (depends on 1)

The secondary battery according to claim 1, wherein melt viscosity of the thermal conductive adhesive is 1000˜1*106 CPs, initial viscosity is 0.5˜100 N, peeling strength is 0.1˜20 N/3 mm, melting temperature is 120° C.˜190° C., thermal conductive coefficient is 0.1˜10000 W/mK; preferably, the melt viscosity of the thermal conductive adhesive is 1000˜20000 CPs, the initial viscosity is 0.5˜60 N, the peeling strength is 0.5˜10 N/3 mm, the melting temperature is 150° C.˜190° C., the thermal conductive coefficient is 0.1˜100 W/mK.

### Claim 9 (depends on 1)

The secondary battery according to claim 1, wherein area of the thermal conductive adhesive is 1 mm2˜500 mm2, thickness of the thermal conductive adhesive is 0.01 mm˜10 mm.

### Claim 10 (depends on 1)

A method for preparing the secondary battery according to claim 1, wherein adding the thermal conductive adhesive on the safety component or the cell, applying a force of 0.1˜100 N so that the safety component is tightly adhered with the cell.
