CN209266446U - A kind of polymer Li-ion battery - Google Patents
A kind of polymer Li-ion battery Download PDFInfo
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- CN209266446U CN209266446U CN201821711276.0U CN201821711276U CN209266446U CN 209266446 U CN209266446 U CN 209266446U CN 201821711276 U CN201821711276 U CN 201821711276U CN 209266446 U CN209266446 U CN 209266446U
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to a kind of polymer ions batteries.Polymer Li-ion battery provided by the utility model includes battery core and at least one layer of internal layer encapsulating film and at least one layer of outer envelope film for coating the battery core, wherein, the internal layer encapsulating film is plastic film or composite plastic film, and the outer envelope film is aluminum-plastic composite membrane.Polymer Li-ion battery provided by the utility model has better air-tightness and appearance, and battery performance is more guaranteed.
Description
Technical field
The utility model belongs to technical field of lithium ion, and in particular to a kind of polymer Li-ion battery.
Background technique
It is increasingly depleted with conventional petroleum resource, and using global warming be the climatic issues of main feature to mankind's prestige
Coerce increasingly severe, new energy is gradually applied in people's lives.Energy-saving and environment-friendly New-energy electric vehicle is increasingly
One of optimal selection as people's trip.One of critical component as New-energy electric vehicle, power battery need higher
Energy density, safer performance and longer service life meet the usage experience of people, battery capacity is done greatly, is
Improve one of the effective way of single battery energy density.According to the textural classification of battery, lithium ion battery can be divided into square aluminium
Shell, cylindrical steel shell and polymer Li-ion battery, in this three kinds of lithium ion battery types, the energy of polymer Li-ion battery is close
Degree is maximum.The electric car for focusing on user experience, the demand to high-energy density battery is more more and more urgent, polymer Li-ion battery
With the maximum advantage of energy density, is gradually paid close attention to and used by people.
Traditional polymer lithium ion battery manufacture is encapsulated using aluminum-plastic composite membrane, plastic-aluminum after film-making assembling
Composite membrane is three-decker, i.e. outer layer: nylon layer, internal layer: cast polypropylene layer (CPP), middle layer: aluminium foil.The effect of aluminium foil
It is to play good water proof effect.Polymer battery can be used and be stored for a long time, will not be occurred because of the steam in environment
Infiltration causes inside battery that chemical reaction occurs and causes ballooning, but for high capacity polymer lithium ion battery, due to
Volume is larger, heavy, and after the encapsulation of single use aluminum-plastic composite membrane, intermediate aluminum plastic film, which is easy to happen, to be pulled open, and angle position rupture etc. is no
Good phenomenon causes aluminium foil corrosion, and battery is because being led to flatulence by steam infiltration, to the use of polymer Li-ion battery
The problems such as causing very big bad hidden danger, including being shortened there are security performance variation, service life.In addition, traditional polymer
There are bladder port exhaust, last edge sealing for the production technology of lithium ion battery.High capacity cell reservoir quantity is more, cannot absorb at once
Electrolyte, unabsorbed electrolyte can pollute the non-edge sealing of bladder port, make non-edge sealing in last sealing due to there is electrolyte dirty
Residue is contaminated, causes edge sealing insecure, air-tightness reduces, and is permeated and the flatulence that absorbs water, is caused by steam after battery is stored for a long time
The problems such as battery performance is deteriorated, service life shortens, it might even be possible to cause safety accident；Or the electrolyte overflowed is dirty
The plastic-aluminum combined film layer of outside batteries is contaminated, makes battery appearance is dirty to scrap.
Utility model content
In order to solve above-mentioned problems of the prior art, the utility model provide a kind of novel polymer lithium from
Sub- battery.
A kind of polymer Li-ion battery provided by the utility model includes: battery core and at least one layer for coating the battery core
Internal layer encapsulating film and at least one layer of outer envelope film, wherein the internal layer encapsulating film is plastic film or composite plastic film, described
Outer envelope film is aluminum-plastic composite membrane.In some embodiments, the internal layer encapsulating film is plastic film, the outer envelope
Film is aluminum-plastic composite membrane.In other embodiments, the internal layer encapsulating film and the outer envelope film are plastic-aluminum combined
Film.Preferably, using plastic film as internal layer encapsulating film.
Embodiment according to the present utility model, the internal layer encapsulating film have organic solvent resistance, heat sealability, airtight
Property, one of flexibility and insulating properties or multiple performance, preferably there is organic solvent resistance, heat sealability, air-tightness, soft simultaneously
Toughness and insulating properties.The internal layer encapsulating film have organic solvent-resistant characteristic, be in order to prevent electrolyte to internal layer encapsulating film
It corrodes.The resistance to organic solvent Typical Representative of the internal layer encapsulating film is propene carbonate (PC), ethylene carbonate (EC), carbonic acid
One of diethylester (DEC), dimethyl carbonate (DMC) and methyl ethyl ester (EMC) or a variety of mixtures.In described
The layer good air-tightness of encapsulating film can prevent the infiltration of air isoreactivity gas, and the work of first of isolation barrier is played to battery core
With.There is the internal layer encapsulating film heat sealability and flexibility can guarantee that the processing performance of internal layer encapsulating film is good, easy to operate
And not cracky, play the role of first of protective layer to battery core.There is the internal layer encapsulating film insulating properties can prevent battery core
Because of micro-short circuit problem caused by heat-sealing processing is bad.The internal layer encapsulating film of the utility model is thin using the plastics of single material
Film, insulation performance are better than the encapsulating film of traditional polymer battery core, prevent battery core because heat-sealing manufacturing deficiency caused by envelope
Dress layer weathers and has good preventive effect the problem of leading to battery micro-short circuit.The outer envelope film should have good gas
Close property, tensile strength and anti-aging property.By being high vacuum state, outer envelope inside the outer envelope film after pumping sealing
The air-tightness of film can prevent the infiltration of the gases such as outside air, and tensile strength and ageing resistance can preferably protect internal electricity
Core extends and uses the time.
Embodiment according to the present utility model, the material of the internal layer encapsulating film include polypropylene (PP), polyethylene
(PE), in cast polypropylene (CPP), polyvinyl chloride (PVC), polyethylene terephthalate (PET) and polycarbonate (PC)
One or more or its various modified material.
In some embodiments, the outer envelope film includes cast polypropylene film layer, the aluminium foil layer set gradually
And nylon layer, it is preferable that the outer envelope film include the cast polypropylene film layer set gradually, aluminium foil layer, nylon layer and
Laminated polyester film.Cast polypropylene film layer is with good organic solvent-resistant and has good heat sealability；Aluminium foil layer tool
There is good air-tightness, prevents the infiltration of the gases such as air；The polyester film high temperature resistant of outermost layer cladding can reach 250~350
DEG C, the deformation that outside batteries are scalded and processing is heated can be prevented.
In some embodiments, the capacity of the poly-lithium battery be 10-2000Ah, preferably 20-1000Ah,
More preferably 20-500Ah.
In some embodiments, the internal layer encapsulating film with a thickness of 0.005-2mm, preferably 0.05-1mm.Some
In embodiment, the outer envelope film with a thickness of 0.05-0.35mm.
The beneficial effects of the utility model are as described below.
There is 2 layers or more of individual packages packaging according to the battery core of polymer Li-ion battery provided by the utility model
Layer, can make battery have better air-tightness and appearance, and battery performance is more guaranteed.
Detailed description of the invention
Fig. 1 is the positive and negative anodes lamination preparation structure figure according to the polymer Li-ion battery of the utility model.
Fig. 2 is the battery core schematic diagram according to the polymer Li-ion battery of the utility model.
Fig. 3 is the internal layer package drawing according to the polymer Li-ion battery of the utility model.
Fig. 4 is to be converted into rectangular schematic diagram according to the finished product battery core of the polymer Li-ion battery of the utility model.
Fig. 5 is the outer envelope figure according to the polymer Li-ion battery of the utility model.
Fig. 6 is the cross-sectional view according to the polymer Li-ion battery of the utility model.
In the accompanying drawings, identical component is indicated by identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Appended drawing reference: 1- positive plate, 2- negative electrode tab, 3- interlayer diaphragm, the naked battery core of 4-, 5- have the anode ear of gel,
6- has the negative electrode lug of gel, 7- internal layer encapsulating film, and 8- is converted into rectangular polymer end product battery core, 9- outer envelope film.
Specific embodiment
To be readily appreciated that the utility model, the utility model is described more detail below.But this is practical new in detailed description
Before type, it should be understood that the utility model is not limited to the specific embodiment of description.It is also understood that term used herein is only
In order to describe specific embodiment, and it is not offered as restrictive.
Embodiment 1:
The preparation of positive plate: with stratiform transition metal oxide lithium salts LiMO2(M=Co, Ni, Mn etc. or its multiplexed combination
Compound) such as LiNi1/3Co1/3Mn1/3O2Or LiFePO4For positive electrode active materials, its ratio be the 95% of powder content, with poly- inclined
Vinyl fluoride is binder, and content 2.5%, conductive agent is carbon nanotube and content of carbon black is 2.5%, and above-mentioned material is added to
It is stirred evenly in N-Methyl pyrrolidone (NMP), slurry is made, anode sizing agent is uniformly coated in the anode with carbon dust
In current collector aluminum foil, it is cut into the size of process stipulation after drying compacting, obtains anode pole piece.
The preparation of negative electrode tab: using artificial graphite as negative electrode active material, its ratio be the 95% of powder content, with butylbenzene rubber
Glue (SBR) is binder, and content 2%, sodium carboxymethylcellulose (CMC) and thickener, content 2%, conductive agent are
Content of carbon black is 1%, and above-mentioned material is add to deionized water and is stirred evenly, and is fabricated to negative electrode slurry, and negative electrode slurry is equal
Even is coated on negative current collector copper foil, and the size of process stipulation is cut into after drying compacting, obtains cathode pole piece.
The preparation of diaphragm: the compound substrate membranes of polypropylene and polyethylene coat the ceramic mixtures such as Kynoar and aluminium oxide
Or a strata vinylidene is coated with as diaphragm after first coating the ceramic layers such as one layer of aluminium oxide on compound substrate membranes.
The preparation of electrolyte: being the lithium hexafluoro phosphate (LiPF of 1M with concentration6) it is lithium salts, with propene carbonate (PC), carbon
The mixture of vinyl acetate (EC) and dimethyl carbonate (DMC) is solvent, propene carbonate (PC), ethylene carbonate (EC) and carbon
Dimethyl phthalate (DMC) weight ratio is PC:EC:DMC=1:1:1, adds the electrolysis additive ethylene carbonate of 1wt%
(VC)。
The preparation of battery core component: positive and negative after the cathode according to made from previous process, diaphragm, anode are sequentially overlapped
Pole pole piece is separated with diaphragm, the battery core as made from lamination process.
The preparation of high capacity polymer lithium ion battery: pole will be had in obtained battery core anode ultrasonic wave or laser welding
The anode ear of ear glue has the negative lug of gel on cathode ultrasonic wave or laser welding, by a kind of material of internal layer
Matter is polypropylene (PP) battery pack core of 0.10mm, carries out first time encapsulation, and package temperature is 180 DEG C, pressure 0.3MPa,
Time is 2 seconds, and relative humidity is≤1%, and dew point is -60 DEG C；It will be injected after the primary battery core baking removal moisture content encapsulated
Electrolyte, through processes such as chemical conversion, two envelopes and after Shape correction, then by finished product battery core closedtop together with tab the up side of being converted into
Type, and anode ear and negative electrode lug are stretched out, with the positive pole ear and negative lug for having gel on ultrasonic wave or laser welding, dress
Enter to rush shell at bag aluminum-plastic composite membrane (internal layer of aluminum-plastic composite membrane be cast polypropylene film, middle layer is aluminium foil layer, and outer layer is Buddhist nun
Imperial layer) carry out second and encapsulate, package temperature is 175 DEG C, pressure be 2 seconds the 0.3MPa time, relative humidity is≤40%,
Large capacity is made and polymerize lithium ion finished battery.
Embodiment 2
Unlike the first embodiment；The preparation of high capacity polymer lithium ion battery: by obtained battery core anode ultrasonic wave
Or the anode ear of gel is had in laser welding, the negative lug of gel is had on cathode ultrasonic wave or laser welding,
By polyethylene (PE) the battery pack core for being 0.10mm with a kind of material in internal layer, carry out carrying out first time encapsulation, encapsulation temperature
Degree is 140 DEG C, pressure 0.3MPa, and the time is 1 second, and relative humidity is≤1%, and dew point is -60 DEG C；This primary was encapsulated
Electrolyte is injected after battery core baking removal moisture content, after the processes such as chemical conversion, two envelopes and Shape correction, then will be at finished product battery core closedtop
It is up converted into square together with tab, and stretches out anode ear and negative electrode lug, with having gel on ultrasonic wave or laser welding
Positive pole ear and negative lug, be packed into rush shell at bag aluminum-plastic composite membrane (internal layer of aluminum-plastic composite membrane be cast polypropylene film,
Middle layer is aluminium foil layer, and outer layer is nylon layer) second of encapsulation is carried out, package temperature is 175 DEG C, pressure 0.3MPa, the time 2
Second, relative humidity is≤40%, and large capacity is made and polymerize lithium ion battery.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 3
Unlike the first embodiment；The preparation of high capacity polymer lithium ion battery: by obtained battery core anode ultrasonic wave
Or the anode ear of gel is had in laser welding, the negative lug of gel is had in the welding of cathode ultrasonic wave, is passed through
Cast polypropylene film (CPP) the battery pack core for being 0.1mm with a kind of material in internal layer carries out first time encapsulation, encapsulation temperature
Degree is 175 DEG C, pressure 0.3MPa, and the time is 2 seconds, and relative humidity is≤1%, and dew point is -60 DEG C；This primary was encapsulated
Electrolyte is injected after battery core baking removal moisture content, after the processes such as chemical conversion, two envelopes and Shape correction, then will be at finished product battery core closedtop
It is up converted into square together with tab, and stretches out anode ear and negative electrode lug, with having gel on ultrasonic wave or laser welding
Positive pole ear and negative lug, be packed into rush shell at bag aluminum-plastic composite membrane (internal layer of aluminum-plastic composite membrane be cast polypropylene film,
Middle layer is aluminium foil layer, and outer layer is nylon layer) second of encapsulation is carried out, package temperature is 175 DEG C, pressure 0.3MPa, the time 2
Second, relative humidity is≤40%, and large capacity is made and polymerize lithium ion battery.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 4
Unlike the first embodiment；The preparation of high capacity polymer lithium ion battery: by obtained battery core anode ultrasonic wave
Welding on have the anode ear of gel, the negative lug of gel is had in the welding of cathode ultrasonic wave, by inside
Polyethylene terephthalate (PET) battery pack core that layer is 0.1mm with a kind of material carries out first time encapsulation, encapsulation
Temperature is 260 DEG C, pressure 0.3MPa, and the time is 2 seconds, and relative humidity is≤1%, and dew point is -60 DEG C；This primary was encapsulated
Battery core baking removal moisture content after inject electrolyte, through processes such as chemical conversion, two envelopes simultaneously after Shape correction, then by finished product battery core closedtop
Place is up converted into square together with tab, and stretches out anode ear and negative electrode lug, on ultrasonic wave or laser welding have gel
Positive pole ear and negative lug, be packed into rush shell at bag aluminum-plastic composite membrane (internal layer of aluminum-plastic composite membrane be cast polypropylene it is thin
Film, middle layer are aluminium foil layer, and outer layer is nylon layer) second of encapsulation is carried out, package temperature is 175 DEG C, pressure 0.3MPa, the time
It is 2 seconds, relative humidity is≤40%, and large capacity is made and polymerize lithium ion battery.
Remaining is with embodiment 1, and which is not described herein again.
Embodiment 5
Unlike the first embodiment；The preparation of high capacity polymer lithium ion battery: by obtained battery core anode ultrasonic wave
Welding on have the anode ear of gel, the negative lug of gel is had in the welding of cathode ultrasonic wave, by inside
The aluminum-plastic composite membrane battery pack core that layer is 0.1mm with a kind of material carries out three bandings dress for the first time, and package temperature is 175 DEG C,
Pressure is 0.3MPa, and the time is 2 seconds, and relative humidity is≤1%, and dew point is -60 DEG C；The primary battery core baking encapsulated is gone
Except injecting electrolyte after moisture content, after the processes such as chemical conversion, two envelopes and Shape correction, then by finished product battery core closedtop together with tab
Up be converted into square, and stretch out anode ear and negative electrode lug, on ultrasonic wave or laser welding have gel positive pole ear and
Negative lug, be packed into rush shell at bag aluminum-plastic composite membrane (internal layer of aluminum-plastic composite membrane be cast polypropylene film, middle layer is aluminium foil
Layer, outer layer is nylon layer) second of encapsulation is carried out, package temperature is 175 DEG C, pressure 0.3MPa, and the time is 2 seconds, relatively wet
Degree is≤40%, and large capacity is made and polymerize lithium ion battery.
Embodiment 6
The internal layer of aluminum-plastic composite membrane is cast polypropylene film unlike the first embodiment, intermediate two layers for aluminium foil layer and
Nylon layer, outermost layer are polyester film.
Comparative example 1
Unlike the first embodiment；The preparation of high capacity polymer lithium ion battery: by obtained battery core anode ultrasonic wave
Or the anode ear of gel is had in laser welding, the negative lug of gel is had on cathode ultrasonic wave or laser welding,
Directly naked battery core dress aluminum-plastic composite membrane (with a thickness of 0.15mm) is packaged, package temperature is 175 DEG C, pressure 0.3MPa,
Time is 2 seconds, and relative humidity is≤1%, and dew point is -60 DEG C；Electrolyte is injected after baking removal moisture content, through chemical conversion, two envelopes etc.
Large capacity is made after process and Shape correction and polymerize lithium ion battery.
Remaining is with embodiment 1, and which is not described herein again.
To the high capacity polymer lithium ion battery of embodiment 1 to 6, capacity can achieve 100~2000Ah, be much higher than
The capacity of the polymer Li-ion battery of current process technology production.To the high capacity polymer lithium ion battery of embodiment 1 to 6
High humidity environment do loop test, specifically carry out constant-current constant-voltage charging to 4.2V with the electric current of 1C, constant pressure to 0.05C is used
The electric current of 1C discharges, and discharges into 3.0V, more than repetitive cycling acts, until battery capacity decays to rated capacity
80%, as a result such as the following table 1.
Table 1
| Group | Cycle life | Flatulence |
| Comparative example 1 | 1200 times | Fail flatulence after circulation |
| Embodiment 1 | 2000 times | It is normal after circulation |
| Embodiment 2 | 2000 times | It is normal after circulation |
| Embodiment 3 | 2000 times | It is normal after circulation |
| Embodiment 4 | 2000 times | It is normal after circulation |
| Embodiment 5 | 2000 times | It is normal after circulation |
| Embodiment 6 | 2000 times | It is normal after circulation |
From showing in embodiment 1-6 in table, battery equal not flatulence in high humidity loop test, and it is each functional, and
There are the bad phenomenons such as capacity attenuation is too fast, and flatulence is serious, thus in the comparative example battery for not passing through a secondary internal layer packaging protection
It is found that the utility model can greatly improve the service life and security performance of large-scale lithium-ion-power cell.
It should be noted that embodiment described above is only used for explaining the utility model, do not constitute practical new to this
Any restrictions of type.The utility model is described by referring to exemplary embodiments, it should be appreciated that used in it
Word is descriptive and explanatory vocabulary, rather than limited vocabulary.It can be by the model provided in the utility model claims
Enclose it is interior the utility model is modified, and without departing substantially from the scope of the utility model and spirit in the utility model carry out
Revision.Although the utility model relates to specific method, material and embodiments described in it, it is not intended that this is practical
It is novel to be limited to particular case disclosed in it, on the contrary, the utility model can be extended to other all methods with the same function and
Using.
Claims (8)
1. a kind of polymer Li-ion battery comprising: battery core and at least one layer of internal layer encapsulating film and extremely for coating the battery core
Few one layer of outer envelope film, wherein the internal layer encapsulating film is plastic film or composite plastic film, and the outer envelope film is aluminium
Mould composite membrane.
2. polymer Li-ion battery according to claim 1, which is characterized in that the material of the internal layer encapsulating film includes
Polypropylene (PP), polyethylene (PE), cast polypropylene (CPP), polyvinyl chloride (PVC), polyethylene terephthalate (PET)
One of with polycarbonate (PC).
3. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the outer envelope film
Including cast polypropylene film layer, aluminium foil layer and the nylon layer set gradually.
4. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the outer envelope film
Including cast polypropylene film layer, aluminium foil layer, nylon layer and the laminated polyester film set gradually.
5. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the internal layer encapsulating film
With a thickness of 0.005-2.00mm；The outer envelope film with a thickness of 0.05-0.35mm.
6. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the internal layer encapsulating film
With a thickness of 0.05-1.00mm；The outer envelope film with a thickness of 0.05-0.35mm.
7. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the polymer lithium from
The capacity of sub- battery is 10-2000Ah.
8. polymer Li-ion battery described in any one of -2 according to claim 1, which is characterized in that the polymer lithium from
The capacity of sub- battery is 20-1000Ah.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821711276.0U CN209266446U (en) | 2018-10-22 | 2018-10-22 | A kind of polymer Li-ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821711276.0U CN209266446U (en) | 2018-10-22 | 2018-10-22 | A kind of polymer Li-ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378412A (en) * | 2018-10-22 | 2019-02-22 | 北京环宇东方聚能科技有限公司 | A kind of polymer Li-ion battery and its manufacturing method |
| CN111403814A (en) * | 2020-03-26 | 2020-07-10 | 深圳市量能科技有限公司 | Sealing method and device for polymer lithium ion battery |
-
2018
- 2018-10-22 CN CN201821711276.0U patent/CN209266446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378412A (en) * | 2018-10-22 | 2019-02-22 | 北京环宇东方聚能科技有限公司 | A kind of polymer Li-ion battery and its manufacturing method |
| CN111403814A (en) * | 2020-03-26 | 2020-07-10 | 深圳市量能科技有限公司 | Sealing method and device for polymer lithium ion battery |
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