CN107863460A - A kind of flame retardant coating for lithium battery pack and preparation method thereof - Google Patents
A kind of flame retardant coating for lithium battery pack and preparation method thereof Download PDFInfo
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- CN107863460A CN107863460A CN201711090196.8A CN201711090196A CN107863460A CN 107863460 A CN107863460 A CN 107863460A CN 201711090196 A CN201711090196 A CN 201711090196A CN 107863460 A CN107863460 A CN 107863460A
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- Prior art keywords
- retardant coating
- flame retardant
- flame
- expansion type
- retardant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
- H01M50/1243—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure characterised by the internal coating on the casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention discloses a kind of flame retardant coating for lithium battery pack, and the flame retardant coating is coated on battery bag casing, includes expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly by interior；Expansion type flame-retardant coatings include following component：Modified polyamide 66, melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron, Firebrake ZB and modified polyurethane adhesive.The flame retardant coating of this programme can be coated on the casing of battery bag, by the cooperation of expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor, by polytetrafluoroethylene floor as first of fire-retardant defence line, tackle the hot environment in battery；There is exception when being worked in battery, electric current is exceeded, when temperature drastically raises, after polytetrafluoroethylene floor is destroyed, by expansion type flame-retardant coatings as the fire-retardant defence line of second, expansion type flame-retardant coatings expand at 280 DEG C, barrier layer is formed, effectively postpones or avoids burning, the generation of explosion accident.
Description
Technical field
The invention belongs to field of new energy technologies, and in particular to a kind of flame retardant coating and its preparation side for lithium battery pack
Method.
Background technology
Since industrial society, the required energy in each field of social production and transport etc. typically relies on traditional energy, so
And trend of the natural energy source such as continually developing with traditional energy, oil in exhaustion, therefore, the mankind are to new energy
Development and utilization becomes increasingly to pay attention to.Electric automobile just answers gesture to produce.Electric automobile is that dependence electric power is power as its name suggests
Automobile, wherein most crucial part is the development of battery bag.Lithium ion battery bag has energy density height, operating voltage
Height, broad application temperature range, have extended cycle life, memory-less effect the advantages that, be widely used in electronic equipment, electric automobile etc. neck
In domain, however just because of energy density height, operating voltage height etc. working environment cause its have easily catch fire, explosive etc. is pacified
Full problem, therefore to effective fire-retardant focus as battery bag research of battery bag.
Mainly one layer of insulant, currently used insulation are covered for the fire-retardant measure of battery bag on battery bag surface
Thing is generally aluminum oxide, zirconium oxide, silicon nitride etc., and these insulants can play certain flame-resistant insulation effect, but these nothings
The flame retardant effect of machine insulant is very limited amount of, can not tackle battery it is existing in use easily catch fire, explosive is asked
Topic, it is impossible to ensure the safety in utilization of battery.Therefore also need to study flame retardant coating, maximumlly to reduce safe thing
Therefore incidence.
The content of the invention
Goal of the invention：Present invention aims in view of the shortcomings of the prior art, there is provided a kind of good flame retardation effect, can be directed to each
Effectively fire-retardant, explosion-proof flame retardant coating of the lithium battery pack of class capacitance and preparation method thereof.
Technical scheme：A kind of flame retardant coating for lithium battery pack of the present invention, the flame retardant coating are coated on battery bag
Casing on, include expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly by interior；
The expansion type flame-retardant coatings include following component：
Further, following component is included as preferred embodiment, the expansion type flame-retardant coatings：
Further, comprise the following steps as preferred embodiment, the preparation method of the modified polyurethane adhesive：
(11) polyglycerol of special ratios, polytetramethylene ether diol are added in reactor, then adds solvent and stir
Mix to being well mixed, add IPDI, the molar ratio for making NCO/-OH is 0.5~0.65:1, add catalysis
Temperature is raised after agent to 70~75 DEG C, reacts 1~2h；
(12) toluene di-isocyanate(TDI) is added into step (11) system, the molar ratio for making the total NCO/-OH of system is
0.95~0.98:1, acrylic diluents are then added, adjust the temperature to 75~85 DEG C, continue 1.5~2h of reaction；
(13) add chain initiator into step (12) system and chain-transferring agent, regulation system temperature are drawn to 55~62 DEG C
Acroleic acid polymerization is sent out, stops reaction after reacting 3~4h, obtains modified polyurethane adhesive.
Further, as preferred embodiment, polyglycerol, polytetramethylene ether diol concrete model point in step (11)
Not Wei PPG1000 and PTMEG650, and both molar ratio be 1~3：1.
Further, as preferred embodiment, the modified polyamide 66 is the nano-complex of OMMT modified Pa 6s 6, described
OMMT is epoxy resin modification montmorillonite.
Further, comprise the following steps as preferred embodiment, the preparation method of the modified polyamide 66：
(21) montmorillonite and epoxy resin are kneaded 10~15min at 150~200 DEG C on double roll mill, then
Crush, sieving, obtain epoxy resin modification montmorillonite OMMT；
(22) nano-complex of OMMT modified Pa 6s 6 is prepared using melt intercalated method using epoxy resin modification montmorillonite.
Further, as preferred embodiment, the expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor thickness
Respectively 0.4~0.9um, 0.2~0.4um and 0.1~0.3um.
Further, as preferred embodiment, the adhesive layer is epoxy resin adhesive layer.
Further, comprise the following steps as preferred embodiment, the preparation method of the expansion type flame-retardant coatings：
(31) melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron and Firebrake ZB are blended simultaneously at a high speed in proportion
Stirring, obtains fire-retardant compound ligand；
(32) modified polyamide 66 is heated into melting, then added fire-retardant compound ligand in molten system, under nitrogen environment
Stir to well mixed；
(33) step (32) system is added in modified polyurethane adhesive while hot, high-speed stirred is uniform, then applies while hot
Cloth is dried on the casing of battery bag.
Beneficial effect：(1) flame retardant coating provided by the invention can be coated on the casing of battery bag, pass through expansion type flame-retarding
The cooperation of coating, adhesive layer and polytetrafluoroethylene floor, by polytetrafluoroethylene floor as first of fire-retardant defence line, tackle in battery
Hot environment；There is exception when being worked in battery, electric current is exceeded, when temperature drastically raises, after polytetrafluoroethylene floor is destroyed,
By expansion type flame-retardant coatings as the fire-retardant defence line of second, expansion type flame-retardant coatings expansion under the high temperature conditions, one layer of resistance is formed
Interlayer, effectively avoid burning, the generation of explosion accident；(2) in this programme, from molybdenum trioxide, cyclopentadienyl group iron and boric acid
The compounding product of zinc assists to improve the flame retardant effect of modified polyamide 66 and melamine cyanurate as fire-retardant synergic agent；
(3) special modified polyurethane adhesive is selected in this programme, the degree of adhesion of fire retardant and adhesive is on the one hand improved, avoids band
Fire retardant drops during battery use, the problem of causing fire resistance to decline；On the other hand improve and battery pole lodge body
Tack, ensure that flame retardant coating can be firmly attached on battery bag casing in cell operations, ensure that battery is normal
Operation.
Embodiment
Technical solution of the present invention is described in detail below by embodiment, but protection scope of the present invention is not limited to
In the embodiment.For example no special explanation of reagent used in present embodiment is conventional commercial medicine.
Embodiment 1：A kind of flame retardant coating for lithium battery pack, the flame retardant coating are coated on the casing of battery bag, by
Inside include expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly；Adhesive layer is epoxy resin adhesive
Layer；Expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor thickness are respectively 0.8um, 0.3um and 0.2um；
The expansion type flame-retardant coatings include following component：
The preparation method of the modified polyurethane adhesive comprises the following steps：
(11) polyglycerol of special ratios, polytetramethylene ether diol are added in reactor, then adds solvent and stir
Mix to being well mixed, add IPDI, the molar ratio for making NCO/-OH is 0.5:1, risen after adding catalyst
High-temperature reacts 1.5h to 72 DEG C；Wherein polyglycerol, polytetramethylene ether diol concrete model be respectively PPG1000 and
PTMEG650, and both molar ratios are 2：1；
(12) toluene di-isocyanate(TDI) is added into step (11) system, the molar ratio for making the total NCO/-OH of system is
0.96:1, acrylic diluents are then added, adjust the temperature to 80 DEG C, continue to react 1.5h；
(13) chain initiator and chain-transferring agent are added into step (12) system, regulation system temperature triggers third to 60 DEG C
Olefin(e) acid polymerize, and stops reaction after reacting 3.5h, obtains modified polyurethane adhesive.
The modified polyamide 66 is the nano-complex of OMMT modified Pa 6s 6, and the OMMT is that epoxy resin modification illiteracy is de-
Soil；The preparation method of modified polyamide 66 comprises the following steps：
(21) montmorillonite and epoxy resin are kneaded 14min at 185 DEG C on double roll mill, then crush, sieve,
Obtain epoxy resin modification montmorillonite OMMT；
(22) nano-complex of OMMT modified Pa 6s 6 is prepared using melt intercalated method using epoxy resin modification montmorillonite.
The preparation method of the expansion type flame-retardant coatings comprises the following steps：
(31) melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron and Firebrake ZB are blended simultaneously at a high speed in proportion
Stirring, obtains fire-retardant compound ligand；
(32) modified polyamide 66 is heated into melting, then added fire-retardant compound ligand in molten system, under nitrogen environment
Stir to well mixed；
(33) step (32) system is added in modified polyurethane adhesive while hot, high-speed stirred is uniform, then applies while hot
Cloth is dried on the casing of battery bag.
Embodiment 2：A kind of flame retardant coating for lithium battery pack, the flame retardant coating are coated on the casing of battery bag, by
Inside include expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly；Adhesive layer is epoxy resin adhesive
Layer；Expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor thickness are respectively 0.4um, 0.2um and 0.1um；
The expansion type flame-retardant coatings include following component：
The preparation method of the modified polyurethane adhesive comprises the following steps：
(11) polyglycerol of special ratios, polytetramethylene ether diol are added in reactor, then adds solvent and stir
Mix to being well mixed, add IPDI, the molar ratio for making NCO/-OH is 0.5~0.65:1, add catalysis
Temperature is raised after agent to 70 DEG C, reacts 1h；Wherein polyglycerol, polytetramethylene ether diol concrete model are respectively PPG1000
And PTMEG650, and both molar ratios are 1：1；
(12) toluene di-isocyanate(TDI) is added into step (11) system, the molar ratio for making the total NCO/-OH of system is
0.95:1, acrylic diluents are then added, adjust the temperature to 75 DEG C, continue to react 1.5h；
(13) chain initiator and chain-transferring agent are added into step (12) system, regulation system temperature triggers third to 55 DEG C
Olefin(e) acid polymerize, and stops reaction after reacting 3h, obtains modified polyurethane adhesive.
The modified polyamide 66 is the nano-complex of OMMT modified Pa 6s 6, and the OMMT is that epoxy resin modification illiteracy is de-
Soil；The preparation method of modified polyamide 66 comprises the following steps：
(21) montmorillonite and epoxy resin are kneaded 10min at 150 DEG C on double roll mill, then crush, sieve,
Obtain epoxy resin modification montmorillonite OMMT；
(22) nano-complex of OMMT modified Pa 6s 6 is prepared using melt intercalated method using epoxy resin modification montmorillonite.
The preparation method of the expansion type flame-retardant coatings comprises the following steps：
(31) melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron and Firebrake ZB are blended simultaneously at a high speed in proportion
Stirring, obtains fire-retardant compound ligand；
(32) modified polyamide 66 is heated into melting, then added fire-retardant compound ligand in molten system, under nitrogen environment
Stir to well mixed；
(33) step (32) system is added in modified polyurethane adhesive while hot, high-speed stirred is uniform, then applies while hot
Cloth is dried on the casing of battery bag.
Embodiment 3：A kind of flame retardant coating for lithium battery pack, the flame retardant coating are coated on the casing of battery bag, by
Inside include expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly；Adhesive layer is epoxy resin adhesive
Layer；Expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor thickness are respectively 0.9um, 0.4um and 0.3um；
The expansion type flame-retardant coatings include following component：
The preparation method of the modified polyurethane adhesive comprises the following steps：
(11) polyglycerol of special ratios, polytetramethylene ether diol are added in reactor, then adds solvent and stir
Mix to being well mixed, add IPDI, the molar ratio for making NCO/-OH is 0.65:1, after adding catalyst
Temperature is raised to 75 DEG C, reacts 2h；Wherein polyglycerol, polytetramethylene ether diol concrete model be respectively PPG1000 and
PTMEG650, and both molar ratios are 3：1；
(12) toluene di-isocyanate(TDI) is added into step (11) system, the molar ratio for making the total NCO/-OH of system is
0.98:1, acrylic diluents are then added, adjust the temperature to 85 DEG C, continue to react 2h；
(13) chain initiator and chain-transferring agent are added into step (12) system, regulation system temperature triggers third to 62 DEG C
Olefin(e) acid polymerize, and stops reaction after reacting 4h, obtains modified polyurethane adhesive.
The modified polyamide 66 is the nano-complex of OMMT modified Pa 6s 6, and the OMMT is that epoxy resin modification illiteracy is de-
Soil；The preparation method of modified polyamide 66 comprises the following steps：
(21) montmorillonite and epoxy resin are kneaded 15min at 200 DEG C on double roll mill, then crush, sieve,
Obtain epoxy resin modification montmorillonite OMMT；
(22) nano-complex of OMMT modified Pa 6s 6 is prepared using melt intercalated method using epoxy resin modification montmorillonite.
The preparation method of the expansion type flame-retardant coatings comprises the following steps：
(31) melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron and Firebrake ZB are blended simultaneously at a high speed in proportion
Stirring, obtains fire-retardant compound ligand；
(32) modified polyamide 66 is heated into melting, then added fire-retardant compound ligand in molten system, under nitrogen environment
Stir to well mixed；
(33) step (32) system is added in modified polyurethane adhesive while hot, high-speed stirred is uniform, then applies while hot
Cloth is dried on the casing of battery bag.
The fire-retardant figure layer that the present invention program provides has preferable fire-retardant, explosion-proof effect on the case coated in battery bag, gather
Tetrafluoroethene layer and expansion type flame-retardant coatings form the fire-retardant defence line of twice, ensure battery can in large temperature range normal work
Make, once the situation of excess load occurs in battery, electric current, which steeply rises, causes temperature to raise, swollen when spin manifold temperature is increased to 280 DEG C
Swollen type flame retardant coating initially forms one layer of barrier layer, is raised with the temperature in battery bag, and barrier layer is persistently formed, and the barrier layer can
With the thermal shock power inside buffer battery bag, temperature in battery bag is reached 600 DEG C of phenomenons that will not still produce combustion explosion, have
Delay even effect avoids burning, the generation of explosion accident.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, but it must not be explained
For to the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims define are not departed from
Various changes can be made in the form and details for it.
Claims (9)
1. a kind of flame retardant coating for lithium battery pack, the flame retardant coating is coated on the casing of battery bag, it is characterised in that：Institute
State flame retardant coating includes expansion type flame-retardant coatings, adhesive layer and polytetrafluoroethylene floor successively outwardly by interior；
The expansion type flame-retardant coatings include following component：
2. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The expansion type flame-retardant coatings
Including following component：
3. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The modified polyurethane gluing
The preparation method of agent comprises the following steps：
(11) polyglycerol of special ratios, polytetramethylene ether diol are added in reactor, then adds stirring solvent extremely
It is well mixed, IPDI is added, the molar ratio for making NCO/-OH is 0.5~0.65:1, after adding catalyst
Temperature is raised to 70~75 DEG C, reacts 1~2h；
(12) toluene di-isocyanate(TDI) is added into step (11) system, the molar ratio for making the total NCO/-OH of system is 0.95
~0.98:1, acrylic diluents are then added, adjust the temperature to 75~85 DEG C, continue 1.5~2h of reaction；
(13) chain initiator and chain-transferring agent are added into step (12) system, regulation system temperature triggers third to 55~62 DEG C
Olefin(e) acid polymerize, and stops reaction after reacting 3~4h, obtains modified polyurethane adhesive.
4. the flame retardant coating according to claim 3 for lithium battery pack, it is characterised in that：Poly- the third three in step (11)
Alcohol, polytetramethylene ether diol concrete model are respectively PPG1000 and PTMEG650, and both molar ratios are 1~3：1.
5. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The modified polyamide 66 is
The nano-complex of OMMT modified Pa 6s 6, the OMMT are epoxy resin modification montmorillonite.
6. the flame retardant coating according to claim 5 for lithium battery pack, it is characterised in that：The modified polyamide 66
Preparation method comprises the following steps：
(21) montmorillonite and epoxy resin are kneaded 10~15min at 150~200 DEG C on double roll mill, then crush,
Sieving, obtains epoxy resin modification montmorillonite OMMT；
(22) nano-complex of OMMT modified Pa 6s 6 is prepared using melt intercalated method using epoxy resin modification montmorillonite.
7. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The expansion type flame-retarding applies
Layer, adhesive layer and polytetrafluoroethylene floor thickness are respectively 0.4~0.9um, 0.2~0.4um and 0.1~0.3um.
8. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The adhesive layer is epoxy
Resin adhesive layer.
9. the flame retardant coating according to claim 1 for lithium battery pack, it is characterised in that：The expansion type flame-retardant coatings
Preparation method comprise the following steps：
(31) simultaneously high-speed stirred is blended in melamine cyanurate, molybdenum trioxide, cyclopentadienyl group iron and Firebrake ZB in proportion,
Obtain fire-retardant compound ligand；
(32) modified polyamide 66 is heated into melting, then fire-retardant compound ligand is added in molten system, stirred under nitrogen environment
It is extremely well mixed；
(33) step (32) system is added in modified polyurethane adhesive while hot, high-speed stirred is uniform, is then coated on while hot
On the casing of battery bag, and dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711090196.8A CN107863460B (en) | 2017-11-08 | 2017-11-08 | Flame-retardant coating for lithium battery pack and preparation method thereof |
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| CN201711090196.8A CN107863460B (en) | 2017-11-08 | 2017-11-08 | Flame-retardant coating for lithium battery pack and preparation method thereof |
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| CN107863460A true CN107863460A (en) | 2018-03-30 |
| CN107863460B CN107863460B (en) | 2020-08-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736013A (en) * | 2018-05-30 | 2018-11-02 | 桑德集团有限公司 | It is a kind of for the functional coating of battery, preparation method, battery module and battery modules |
| CN113270633A (en) * | 2021-07-21 | 2021-08-17 | 成都特隆美储能技术有限公司 | Manufacturing method of flame-retardant packaging material for square aluminum shell lithium ion battery |
| CN113388297A (en) * | 2021-06-10 | 2021-09-14 | 湖北亿纬动力有限公司 | Intumescent fire-retardant coating and preparation method and application thereof |
| CN116200112A (en) * | 2021-11-30 | 2023-06-02 | 浙江洛克新材料股份有限公司 | Protective coating for lithium battery and preparation process thereof |
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| CN101608065A (en) * | 2009-07-03 | 2009-12-23 | 深圳市华力兴工程塑料有限公司 | Halogen-free environment-friendly flame-proof enhanced Nylon 66 and preparation method thereof |
| CN104099055A (en) * | 2013-04-07 | 2014-10-15 | 广东国望精细化学品有限公司 | Halogenn-free flame retardant polyurethane sealant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736013A (en) * | 2018-05-30 | 2018-11-02 | 桑德集团有限公司 | It is a kind of for the functional coating of battery, preparation method, battery module and battery modules |
| CN113388297A (en) * | 2021-06-10 | 2021-09-14 | 湖北亿纬动力有限公司 | Intumescent fire-retardant coating and preparation method and application thereof |
| CN113270633A (en) * | 2021-07-21 | 2021-08-17 | 成都特隆美储能技术有限公司 | Manufacturing method of flame-retardant packaging material for square aluminum shell lithium ion battery |
| CN116200112A (en) * | 2021-11-30 | 2023-06-02 | 浙江洛克新材料股份有限公司 | Protective coating for lithium battery and preparation process thereof |
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| Publication number | Publication date |
|---|---|
| CN107863460B (en) | 2020-08-07 |
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