Notebook Battery built in a kind of high security high-energy densityTechnical field
The invention belongs to polymer Li-ion battery fields, more particularly, in a kind of high security high-energy densitySet Notebook Battery.
Background technique
With the development of mobile calculation technique and wireless communication technique, handhold mobile terminal equipment acquires in mobile data,It is more and more applied in the fields such as transmission, processing and personal information service.Its power supply mode of its moveable characteristic requirementsBased on battery.Lithium battery has that small in size, energy density is high, memory-less effect, cycle life are high, high-voltage battery and puts certainlyThe electric low advantage of rate, has become the preferred battery of hand-held terminal device in recent years.
Meanwhile in order to meet complicated application environment requirement, handhold mobile terminal equipment should also have good temperature and humidity,Anti-interference, antiknock quality.Especially for consumer application, cost be also mobile terminal device design in important consideration becauseElement.The demand of characteristic and above-mentioned application environment for lithium battery, proposes the design of handhold mobile terminal equipment charging circuitHigher requirement is gone out.
Currently, mainstream is 18650 cylindrical lithium ion batteries in the market, with small in size, light-weight, capacityGreatly, the advantages that memory effect is low, the charging time is short, so largely being used by businessman.But the pen of 18650 cylindrical batteries compositionIt is immutable to remember that this computer battery has the shortcomings that: cell thickness is more than that 20mm and safety are bad.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides notebooks built in a kind of high security high-energy densityBattery.
Above-mentioned purpose of the invention is achieved by the following technical programs.
Notebook Battery built in a kind of high security high-energy density, including power supervisor, high polymer glue frame and built-inBattery；The high polymer glue frame is made of the polycarbonate of 25-50% and the polyacrylonitrile of 50-75%；The internal batteryAnode sizing agent contains the cobalt acid lithium of 95-96wt%, and negative electrode slurry contains the graphite of 93.0-96.0wt%.
Preferably, the anode sizing agent also includes CNTs 0.7wt%-1.2wt%, carbon black CB
1.0wt%-2.0wt%, PVDF 1.5wt%-2.5wt%, NMP 0.25wt%-0.35wt%；The cathode slurryMaterial also includes carbon black CB 1.0wt%-2.0wt%, CMC 1.0wt%-2.5wt%, SBR 2.0wt%-3.0wt%.
Preferably, the cobalt acid lithium is D50=15.0-20.0 μm of monocrystalline bulky grain of partial size；Tap density:
2.8-3.0g/cc。
Preferably, the graphite is D50=17.0-22.0 μm of partial size；Tap density: 1.0-1.15g/cc.
Preferably, the anode sizing agent, negative electrode slurry are respectively coated, after roll-in formation positive and negative plate, by positive/negative plateWinding, core toast 2.0-4.0h with the pressure concora crush of 0.45-0.80MPa and in 70 DEG C of -80 DEG C of environment；Then through batteryAt, storage to get to the built-in Notebook Battery.
Preferably, the Battery formation are as follows: pressurizeed with 0.4-0.6MPa to battery, and keep institute in battery forming processState pressure；Formation process: a.0.03-0.05C constant-current charge to 3.70V-3.80V；B.0.08-0.12C constant-current charge is to 3.95-4.05V。
Preferably, the condition of storage is to store 6-10h in 70-85 DEG C of environment.
Preferably, the positive plate with a thickness of 0.115-0.125mm, the negative electrode tab with a thickness of
0.128-0.135mm。
Preferably, the plus plate current-collecting body is the aluminium foil of 12-15 μ m thick, and the negative current collector is 6-9 μ m thickCopper foil.
Compared with prior art, the beneficial effects of the invention are that:
(1) Inventive polymers lithium-ion electric core has ultra-thin function with a thickness of 2.5mm, Notebook Battery with a thickness of 2.8mmEnergy.
(2) Inventive polymers lithium-ion electric core energy density reaches 680Wh/L, than general commercial Notebook Battery energyDensity improves 10%-20%.
(3) the high-performance electric source manager that Notebook Battery uses in the present invention can monitor the electricity of every piece of lithium-ion electric corePressure, electric current and temperature, ensure that the safe handling of Notebook Battery.
(4) Notebook Battery of the present invention uses high polymer glue frame while there is high-intensitive hardness and flexibility, guaranteesNotebook Battery has the performance of shockproof drop resistant, while its fire-protection rating is 0 grade of highest level.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present inventionIt is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used toLimit the present invention.Unless stated otherwise, the present invention uses reagent, method and apparatus is the art conventional reagents, methodAnd equipment.
It has been investigated that Notebook Battery built in a kind of high security high-energy density, including power supervisor, high polymerGlue frame and internal battery；The high polymer glue frame is made of the polycarbonate of 25-50% and the polyacrylonitrile of 50-75%；It is describedThe anode sizing agent of internal battery contains the cobalt acid lithium of 95-96wt%, and negative electrode slurry contains the graphite of 93.0-96.0wt%.
The method of the present invention is further described by taking specific implementation condition as an example below.
Embodiment 1
Power supervisor described in the present embodiment uses the high-performance electric source manager of BQ3060 type；The high polymer glue frame by25% polycarbonate and 75% polyacrylonitrile are mixed.
The anode sizing agent is made of following each component: cobalt acid lithium 95.0wt%, CNTs 1.2wt%, carbon blackCB1.5wt%, PVDF 2wt%, NMP 0.30wt%；The cobalt acid lithium is D50=15.0-20.0 μm of monocrystalline bulky grain of partial size；Tap density: 2.8-3.0g/cc.
The negative electrode slurry is made of following each component: graphite 96.0wt%, carbon black CB 1.0wt%, CMC1.0wt%,SBR 2.0wt%；The graphite is D50=17.0-22.0 μm of partial size；Tap density: 1.0-1.15g/cc.
By the anode sizing agent, negative electrode slurry be respectively coated in 12-15 μ m thick aluminium foil and 6-9 μ m thick copper foil,Roll-in forms positive and negative plate, the positive plate with a thickness of 0.115-0.125mm, the negative electrode tab with a thickness of 0.128-0.135mm；Positive/negative plate is wound, core is toasted with the pressure concora crush of 0.45-0.80MPa and in 70 DEG C of -80 DEG C of environment2.0-4.0h；Then through Battery formation, storage to get to the built-in Notebook Battery.
The Battery formation are as follows: pressurizeed with 0.4-0.6MPa to battery, and keep the pressure in battery forming process；Formation process: a.0.03-0.05C constant-current charge to 3.70V-3.80V；B.0.08-0.12C constant-current charge is to 3.95-4.05V.
The condition of storage is to store 6-10h in 70-85 DEG C of environment.
The built-in Notebook Battery of the present embodiment with a thickness of 2.8mm, there is ultra-thin function, battery core energy density reaches680Wh/L。
Embodiment 2
The present embodiment and the difference of embodiment 1 are only that: the high polymer glue frame is by 50% polycarbonate and 50%Polyacrylonitrile is mixed.The anode sizing agent is made of following each component: cobalt acid lithium 96.0wt%, CNTs 0.7wt%, carbonBlack CB 1.0wt%, PVDF 1.95wt%, NMP 0.35wt%；The negative electrode slurry is made of following each component: graphite93.0wt%, carbon black CB 2.0wt%, CMC 2.5wt%, SBR 2.5wt%.
The built-in Notebook Battery of the present embodiment with a thickness of 2.8mm, there is ultra-thin function, battery core energy density reaches680Wh/L。
Embodiment 3
The present embodiment and the difference of embodiment 1 are only that: the high polymer glue frame is by 40% polycarbonate and 60%Polyacrylonitrile is mixed.The anode sizing agent is made of following each component: cobalt acid lithium 95.25wt%, CNTs 1wt%, carbon blackCB 2.0wt%, PVDF 1.5wt%, NMP 0.25wt%；The negative electrode slurry is made of following each component: graphite93.5wt%, carbon black CB 1.5wt%, CMC 2wt%, SBR 3.0wt%.
The built-in Notebook Battery of the present embodiment with a thickness of 2.8mm, there is ultra-thin function, battery core energy density reaches680Wh/L。
Comparative example 1
The difference of this comparative example and embodiment 1 is only that: the high polymer glue frame is by 55% polycarbonate and 45%Polyacrylonitrile composition.
It finds after tested, the built-in notebook battery security is bad, heat resistance, weatherability, ageing resistance, mouldabilityIt is poor compared with embodiment 1；And the glue frame of embodiment 1 its shockproof drop resistant performance, fire protecting performance are more excellent.
Comparative example 2
The difference of this comparative example and embodiment 1 is only that: anode sizing agent composition are as follows: cobalt acid lithium 94.0wt%,CNTs2.9wt%, carbon black CB 0.8wt%, PVDF 2wt%, NMP 0.30wt%；The negative electrode slurry composition are as follows: graphite91wt%, carbon black CB 2.5wt%, CMC 3wt%, SBR 3.5wt%.
It finds after tested, the battery core energy density of the built-in Notebook Battery only 610Wh/L or so, substantially less than embodiment1。
Implementation of the invention is described in detail above, it is still, specific thin during present invention is not limited to the embodiments described aboveSection within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, these simple changesType all belongs to the scope of protection of the present invention.