CN109921088A - A kind of column lithium ion battery and preparation method thereof - Google Patents
A kind of column lithium ion battery and preparation method thereof Download PDFInfo
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- CN109921088A CN109921088A CN201910212615.3A CN201910212615A CN109921088A CN 109921088 A CN109921088 A CN 109921088A CN 201910212615 A CN201910212615 A CN 201910212615A CN 109921088 A CN109921088 A CN 109921088A
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Abstract
The invention discloses a kind of column lithium ion batteries and preparation method thereof, belong to cell manufacturing techniques field, anode includes any one or a few the mixture in cobalt acid lithium, LiMn2O4, lithium nickelate, cobalt manganic acid lithium, nickel ion doped, lithium nickel cobaltate, nickle cobalt lithium manganate, nickel cobalt lithium aluminate；Cathode based on graphite or graphite containing silicon compound as aggregate, using in zero dimension carbon material and one-dimensional carbon material any one or both mixture as filler；Shell is using cylindrical steel shell.The present invention, by building good conductive network in lithium ion cell electrode, promotes being uniformly distributed for electrolyte, balances the electronics transfer and ion-transfer of electrode on the basis of existing lithium ion battery production technology；Meanwhile the internal resistance of cell is reduced by the way of multi pole ears welding；Keep the energy density of cylindrical battery higher, fast charge ability is obviously improved, and temperature rise is less in charging process, and still maintains good cyclical stability under the conditions of fast charge.
Description
Technical field
The present invention relates to cell manufacturing techniques field, it is specifically related to a kind of column lithium ion battery and its production side
Method.
Background technique
Lithium ion battery due to having many advantages, such as that operating voltage is high, specific capacity is high, having extended cycle life and memory-less effect,
Currently marketed lithium ion battery is broadly divided into rectangular, Soft Roll, cylinder etc. by shape, compared with rectangular, soft-package battery, cylinder
Shape lithium ion battery has in groups flexibly, the advantages such as consistency is good, high degree of automation, and manufacturing cost is low, thus is answered extensively
For in laptop, lighting apparatus, electric tool, electric car.
Though energy density increases column lithium ion battery in recent years, but still is difficult to meet the use need of people
It asks.Such as: it is limited to battery charging rate, electric tool is generally required to be equipped with muti-piece battery in and need to frequently be dismounted, gives
Using bringing very big inconvenience；Though the bellwether tesla automobile in electric car field uses 21700 type cylindrical lithium ion batteries
Course continuation mileage is so promoted to 600km, but the charging of its overlength waits (4h or more) to largely reduced it in the competing of automobile market
Strive power.
Therefore, to meet the market demand, can the column lithium ion battery of fast charge urgently develop.It is limited to lithium ion battery
Own characteristic, energy density and fast charge objectively have bottleneck and mutually restrict, and the lithium ion battery of higher energy density exists
There are the following problems in 20min fast charge: battery capacity can be as examination validity period increases and rapid decay；In charging process in temperature
It rises more.In terms of equipment operation angle, battery energy density be it is absolute, can not substantially compromise, fast charge be it is opposite, one
Determine to be acceptable in range.In conjunction with actual product feature and user experience, inventor thinks it is necessory to provide a kind of monomer
Battery quality energy density is not less than 140Wh/kg and volume energy density is not less than 340Wh/L, can also be achieved 20min and quickly fills
Electric and stable lithium ion battery.
Summary of the invention
1. technical problems to be solved
The technical problem to be solved in the present invention is that providing a kind of column lithium ion battery and preparation method thereof, have
Higher mass energy density and volume energy density, fast charge ability are obviously improved, and temperature rise is less in charging process, and
Good cyclical stability is still maintained under the conditions of fast charge.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that:
A kind of column lithium ion battery, including anode, cathode and shell, the anode include cobalt acid lithium, LiMn2O4, nickel
Sour lithium, cobalt manganic acid lithium, nickel ion doped, lithium nickel cobaltate, nickle cobalt lithium manganate, any one or a few the mixing in nickel cobalt lithium aluminate
Object；The cathode includes aggregate and filler, and the aggregate includes based on graphite or graphite containing silicon compound, and the filler includes
In zero dimension carbon material and one-dimensional carbon material any one or both mixture；The graphite is siliceous negative based on graphite
The partial size D50 value of pole material is 8-22 μm, and tap density is 0.8-1.3g/ ㎝3, specific surface area 0.8-4.0m2/g；Described zero
The average primary particle diameter for tieing up carbon material is 15-70nm, and DBP absorption value is 180-350ml/100g；The one-dimensional carbon material is put down
Equal partial size is 7-11nm, and average length is 5-20 μm；The shell is using cylindrical steel shell.
Further, in cathode, the mass percent of the aggregate is X%, and the value range of X is 90.0 < X < 99.0,
The mass percent of the filler is Y%, and the value range of Y is 1.0 < Y < 10.0.
Further, the outer diameter of the shell is D, and the value range of D is 13mm < D < 33mm, and the height of shell is H, H's
Value range is 27mm < H < 80mm.
The present invention also provides the production methods of above-mentioned column lithium ion battery, include the following steps:
(1) negative electrode of lithium ion battery makes: being coated on after slurry is made in cathode material therefor with a thickness of H1Copper foil on,
H1Value range be 0.004mm < H1< 0.012mm, the two-sided surface density of coating are 1.2-1.9g/dm2；Then carry out at drying
Reason carries out roll-in, compacted density 1.1-1.7g/cm after to be dried3To get negative electrode tab；
(2) lithium ion cell positive makes: positive material therefor, conductive agent, binder being uniformly dispersed in a solvent, closed
It is coated on after slurry with a thickness of H2Aluminium foil on, H2Value range be 0.006mm < H2The two-sided surface density of < 0.020mm, coating is
2.0-4.0g/dm2；Drying and processing is then carried out, carries out roll-in, compacted density 2.5-4.3g/cm after to be dried3To get anode
Piece；
(3) the tab setting of positive and negative electrode: the tab quantity of cathode is 2, is located at step (1) resulting negative electrode tab
Head and the tail both ends, and be fixed on copper foil in a welding manner, the width of each negative lug is W1, W1Value range be 2.0mm
<W1<7.0mm；The total length of step (2) resulting positive plate is L mm, and positive tab quantity is n (1 < n < 5, n are integer),
A tab is respectively set at the iL/ of positive plate (n+1) (i=1,2,3 ..., n) respectively, positive pole ear is in a welding manner
It is fixed on aluminium foil, the width of each positive pole ear is W2, W2Value range be 2.0mm < W2<10.0mm；
(4) lithium ion battery assemble: positive plate, negative electrode tab are first cut into required size, then by the same positive plate of diaphragm,
Negative electrode tab is wound into the battery core of predetermined size together, then gained battery core is placed in cylindrical steel shell, after vacuum bakeout
It injects electrolyte and seals to get column lithium ion battery.
3. beneficial effect
(1) cathode of the invention based on graphite or graphite containing silicon compound as aggregate, with zero dimension carbon material and one-dimensional
In carbon material any one or both mixture be filler, good conductive network can be formed in battery cathode；In anode
Also it joined conductive agent in material, can promote anode and form good conductive network.Then the present invention can be in lithium ion battery
Build good conductive network in electrode, may advantageously facilitate being uniformly distributed for electrolyte, and the electronics transfer of counter electrode and
Ion-transfer；Meanwhile before the assembling of electrode system, multiple tabs are welded, the internal resistance of cell can be reduced, has been more advantageous to and promotes battery
Electric conductivity；The two cooperation, is obviously improved cylindrical battery fast charge ability.
(2) through detecting, the mass energy density of single battery is greater than 140Wh/kg, and single battery volume energy density is greater than
340Wh/L.Battery charges electricity that 20min is filled with up to 80% or more of rated capacity under empty electricity condition；Battery charging
During 20min, 18 DEG C of the maximum temperaturerise < of battery surface temperature；When the 20min fast charge of battery recycles 200 times, battery capacity
It still can reach 80% or more of itself initial capacity, the 20min fast charge cycle life of battery is at 400 times or more.
To sum up, present invention mass energy density with higher and volume energy density, fast charge ability have obtained obviously mentioning
It rises, temperature rise is less in charging process, and good cyclical stability is still maintained under the conditions of fast charge.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
A kind of column lithium ion battery, including anode, cathode and shell, the anode use nickle cobalt lithium manganate Li
(Ni1/3Co1/3Mn1/3)O2；The cathode includes aggregate and filler, and the aggregate includes graphite, and the filler includes zero dimension carbon materials
Material, specially acetylene carbon black LI435；The shell specifically uses 18650 fashioned iron shells, outer diameter using cylindrical steel shell
It is highly 65mm for 18mm.
The production method of above-mentioned column lithium ion battery includes the following steps:
(1) negative electrode of lithium ion battery makes: by graphite, acetylene carbon black LI435, sodium carboxymethylcellulose (CMC), butylbenzene rubber
Glue (SBR) 95:2:1.2:1.8 in mass ratio is uniformly dispersed in deionized water, closes the copper being coated on after starching with a thickness of 0.012mm
On foil, the two-sided surface density (being free of foil) of coating is 1.88g/dm2；Drying and processing is then carried out, carries out roll-in after to be dried,
Compacted density is 1.6g/cm3To get negative electrode tab；
(2) lithium ion cell positive makes: by nickle cobalt lithium manganate Li (Ni1/3Co1/3Mn1/3)O2, it is carbon nanotube (CNT), poly-
Vinylidene (PVDF) 96.5:1.5:2 in mass ratio is uniformly dispersed in N-Methyl pyrrolidone (NMP), is coated on after closing slurry
With a thickness of on the aluminium foil of 0.015mm, the two-sided surface density (being free of foil) of coating is 3.6g/dm2；Drying and processing is then carried out,
Roll-in, compacted density 3.8g/cm are carried out after to be dried3To get positive plate；
(3) the tab setting of positive and negative electrode: the resulting negative electrode tab overall length of step (1) is 715mm, and the tab quantity of cathode is
2, the head and the tail both ends of negative electrode tab are located at, and be fixed on copper foil in a welding manner, the width of each negative lug is
4.0mm；The total length of step (2) resulting positive plate is 600mm, and positive tab quantity is 3, respectively in positive plate
One tab of each setting, positive pole ear are fixed on aluminium foil in a welding manner at 150mm, 300mm, 450mm, each anode pole
The width of ear is 4.0mm；
(4) lithium ion battery assemble: positive plate, negative electrode tab are first cut into required size, then with diaphragm by anode with
Negative electrode tab separates and is organized into the battery core of predetermined size, then gained battery core is placed in 18650 type steel shells, dries through vacuum
Electrolyte is injected after roasting and is sealed to get column lithium ion battery.
The capacity of gained lithium ion battery is 1.8Ah.
C is the rated capacity (Ah) of battery, and I is equal to C (A) for the numerical value of electric current and I；Empty electricity condition battery is with 0.5I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, cut-off current (A) is less than or equal to
0.05I, gained charging capacity (Ah) are J；Empty electricity condition battery, to upper limit voltage (V), is reached with 3I electric current (A) constant-current charge
With the voltage constant-voltage charge after voltage limit, cut-off current (A) is less than or equal to I, and gained charging capacity (Ah) is K；Empty electricity condition
Battery is reached after upper limit voltage with the voltage constant-voltage charge, cut-off current with 3I electric current (A) constant-current charge to upper limit voltage (V)
(A) it is less than or equal to I, then this process is considered as one to lower voltage limit (V) to be less than or equal to 3I electric current (A) constant-current discharge
3C circulation；
Test result is as follows:
(1) mass energy density of single battery is 175Wh/kg, and the volume energy density of single battery is 363Wh/L.
(2) temp probe is placed at the 1/2 of battery surface short transverse, battery is from empty electricity condition battery with 3I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, charging process continues 20min, phase
Between pop one's head between maximum temperature and the initial temperature of start recording 5 DEG C of difference.
In (3) the 1st circulations, K/J > 0.862,
In (4) the 10th circulations, K/J > 0.854,
In (5) the 200th circulations, K/J > 0.818.
Embodiment 2
A kind of column lithium ion battery, including anode, cathode and shell, the anode use nickle cobalt lithium manganate Li
(Ni0.8Co0.1Mn0.1)O2；The cathode includes aggregate and filler, and the aggregate includes graphite, and the filler includes zero dimension carbon materials
Expect that carbon black SP and one-dimensional carbon material carbon nanotube CNT, filler are combined conductive agent (SP:CNT=7:3)；The shell is using circle
Cylindricality steel shell specifically uses 18650 fashioned iron shells, and outer diameter 18mm is highly 65mm.
The production method of above-mentioned column lithium ion battery includes the following steps:
(1) negative electrode of lithium ion battery makes: by graphite, combined conductive agent (SP:CNT=7:3), sodium carboxymethylcellulose
(CMC), butadiene-styrene rubber (SBR) 95:2:1.2:1.8 in mass ratio is uniformly dispersed in deionized water, is coated on thickness after closing slurry
For on the copper foil of 0.009mm, the two-sided surface density (being free of foil) of coating is 1.88g/dm2；Drying and processing is then carried out, wait dry
Roll-in, compacted density 1.6g/cm are carried out after dry3To get negative electrode tab；
(2) lithium ion cell positive makes: by nickle cobalt lithium manganate Li (Ni0.8Co0.1Mn0.1)O2, conductive agent (LI435:CNT
=7:3), Kynoar (PVDF) 96.5:1.5:2 in mass ratio be uniformly dispersed in N-Methyl pyrrolidone (NMP), close slurry
It is coated on the aluminium foil with a thickness of 0.012mm afterwards, the two-sided surface density (being free of foil) of coating is 3.7g/dm2；Then dried
Dry-cure carries out roll-in, compacted density 3.5g/cm after to be dried3To get positive plate；
(3) the tab setting of positive and negative electrode: the resulting negative electrode tab overall length of step (1) is 775mm, and the tab quantity of cathode is
2, the head and the tail both ends of negative electrode tab are located at, and be fixed on copper foil in a welding manner, the width of each negative lug is
3.0mm；The total length of step (2) resulting positive plate is 660mm, and positive tab quantity is 4, respectively in positive plate
One tab of each setting, positive pole ear are fixed on aluminium foil in a welding manner at 132mm, 264mm, 396mm, 528mm, each
The width of positive pole ear is 3.0mm；
(4) lithium ion battery assemble: positive plate, negative electrode tab are first cut into required size, then with diaphragm by anode with
Negative electrode tab separates and is organized into the battery core of predetermined size, then gained battery core is placed in 18650 type steel shells, dries through vacuum
Electrolyte is injected after roasting and is sealed to get column lithium ion battery.
The capacity of gained lithium ion battery is 2.5Ah.
C is the rated capacity (Ah) of battery, and I is equal to C (A) for the numerical value of electric current and I；Empty electricity condition battery is with 0.5I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, cut-off current (A) is less than or equal to
0.05I, gained charging capacity (Ah) are J；Empty electricity condition battery, to upper limit voltage (V), is reached with 3I electric current (A) constant-current charge
With the voltage constant-voltage charge after voltage limit, cut-off current (A) is less than or equal to I, and gained charging capacity (Ah) is K；Empty electricity condition
Battery is reached after upper limit voltage with the voltage constant-voltage charge, cut-off current with 3I electric current (A) constant-current charge to upper limit voltage (V)
(A) it is less than or equal to I, then this process is considered as one to lower voltage limit (V) to be less than or equal to 3I electric current (A) constant-current discharge
3C circulation；
Test result is as follows:
(1) mass energy density of single battery is 181Wh/kg, and the volume energy density of single battery is 386Wh/L.
(2) temp probe is placed at the 1/2 of battery surface short transverse, battery is from empty electricity condition battery with 3I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, charging process continues 20min, phase
Between pop one's head between maximum temperature and the initial temperature of start recording 8 DEG C of difference.
In (3) the 1st circulations, K/J > 0.854,
In (4) the 10th circulations, K/J > 0.843,
In (5) the 200th circulations, K/J > 0.809.
Embodiment 3
A kind of column lithium ion battery, including anode, cathode and shell, the anode use nickel cobalt lithium aluminate Li
(Ni0.8Co0.1Al0.1)O2；The cathode includes aggregate and filler, and the aggregate includes graphite, and the filler includes zero dimension carbon materials
Expect that carbon black SP and one-dimensional carbon material carbon nanotube CNT, filler are combined conductive agent (SP:CNT=7:3)；The shell is using circle
Cylindricality steel shell specifically uses 18650 fashioned iron shells, and outer diameter 18mm is highly 65mm.
The production method of above-mentioned column lithium ion battery includes the following steps:
(1) negative electrode of lithium ion battery make: negative electrode of lithium ion battery production: by graphite, combined conductive agent (SP:CNT=7:
3), sodium carboxymethylcellulose (CMC), butadiene-styrene rubber (SBR) 95:2:1.2:1.8 in mass ratio are uniformly dispersed in deionized water,
It is coated on the copper foil with a thickness of 0.009mm after closing slurry, the two-sided surface density (being free of foil) of coating is 1.88g/dm2；Then
Drying and processing is carried out, carries out roll-in, compacted density 1.6g/cm after to be dried3To get negative electrode tab；
(2) lithium ion cell positive makes: by nickel cobalt lithium aluminate Li (Ni0.8Co0.1Al0.1)O2, conductive agent (Li435:CNT
=7:3), Kynoar (PVDF) 96.5:1.5:2 in mass ratio be uniformly dispersed in N-Methyl pyrrolidone (NMP), close slurry
It is coated on the aluminium foil with a thickness of 0.012mm afterwards, the two-sided surface density (being free of foil) of coating is 3.6g/dm2；Then dried
Dry-cure carries out roll-in, compacted density 3.5g/cm after to be dried3To get positive plate；
(3) the tab setting of positive and negative electrode: the resulting negative electrode tab overall length of step (1) is 1008mm, and the tab quantity of cathode is
2, the head and the tail both ends of negative electrode tab are located at, and be fixed on copper foil in a welding manner, the width of each negative lug is
3.0mm；The total length of step (2) resulting positive plate is 898mm, and positive tab quantity is 4, respectively in positive plate
One tab of each setting, positive pole ear are fixed on aluminium foil in a welding manner at 201mm, 402mm, 603mm, 804mm, each
The width of positive pole ear is 3.0mm；
(4) lithium ion battery assemble: positive plate, negative electrode tab are first cut into required size, then with diaphragm by anode with
Negative electrode tab separates and is organized into the battery core of predetermined size, then gained battery core is placed in 18650 type steel shells, dries through vacuum
Electrolyte is injected after roasting and is sealed to get column lithium ion battery.
Through detecting, the capacity of gained lithium ion battery is 3.1Ah.
C is the rated capacity (Ah) of battery, and I is equal to C (A) for the numerical value of electric current and I；Empty electricity condition battery is with 0.5I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, cut-off current (A) is less than or equal to
0.05I, gained charging capacity (Ah) are J；Empty electricity condition battery, to upper limit voltage (V), is reached with 3I electric current (A) constant-current charge
With the voltage constant-voltage charge after voltage limit, cut-off current (A) is less than or equal to I, and gained charging capacity (Ah) is K；Empty electricity condition
Battery is reached after upper limit voltage with the voltage constant-voltage charge, cut-off current with 3I electric current (A) constant-current charge to upper limit voltage (V)
(A) it is less than or equal to I, then this process is considered as one to lower voltage limit (V) to be less than or equal to 3I electric current (A) constant-current discharge
3C circulation；
Test result is as follows:
(1) mass energy density of single battery is 207Wh/kg, and the volume energy density of single battery is 412Wh/L.
(2) temp probe is placed at the 1/2 of battery surface short transverse, battery is from empty electricity condition battery with 3I electric current
(A) constant-current charge is to upper limit voltage (V), reaches after upper limit voltage with the voltage constant-voltage charge, charging process continues 20min, phase
Between pop one's head between maximum temperature and the initial temperature of start recording 10 DEG C of difference.
In (3) the 1st circulations, K/J > 0.850,
In (4) the 10th circulations, K/J > 0.841,
In (5) the 200th circulations, K/J > 0.806.
As shown in the above:
The mass energy density of single battery is greater than 140Wh/kg, and single battery volume energy density is greater than 340Wh/L.
Battery charges electricity that 20min is filled with up to 80% or more of rated capacity under empty electricity condition；Battery is electric from sky
State battery is reached after upper limit voltage with the voltage constant-voltage charge, charging with 3I electric current (A) constant-current charge to upper limit voltage (V)
Process continues 20min, 18 DEG C of < of the battery surface temperature maximum temperaturerise in whole process；The 20min fast charge of battery recycles 200 times
When, battery capacity still can reach 80% or more of itself initial capacity, and the 20min fast charge cycle life of battery is at 400 times or more.
Illustrate that fast charge ability of the invention is preferable, and still maintains good cyclical stability under the conditions of fast charge.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen in scope of the presently claimed invention.
Claims (7)
1. a kind of column lithium ion battery, including anode, cathode and shell, which is characterized in that the anode include cobalt acid lithium,
LiMn2O4, lithium nickelate, cobalt manganic acid lithium, nickel ion doped, lithium nickel cobaltate, nickle cobalt lithium manganate, in nickel cobalt lithium aluminate any one or
Several mixtures；The cathode includes aggregate and filler, and the aggregate includes based on graphite or graphite containing silicon compound, institute
State filler include in zero dimension carbon material and one-dimensional carbon material any one or both mixture；The graphite with graphite is
The partial size D50 value of main siliceous negative electrode material is 8-22 μm, and tap density is 0.8-1.3g/ ㎝3, specific surface area 0.8-4.0
㎡/g；The average primary particle diameter of the zero dimension carbon material is 15-70nm, and DBP absorption value is 180-350ml/100g；It is described one-dimensional
The average grain diameter of carbon material is 7-11nm, and average length is 5-20 μm；The shell is using cylindrical steel shell.
2. a kind of column lithium ion battery according to claim 1, which is characterized in that in cathode, the aggregate
Mass percent is X%, and the value range of X is 90.0 < X < 99.0, and the mass percent of the filler is Y%, the value model of Y
It encloses for 1.0 < Y < 10.0.
3. a kind of column lithium ion battery according to claim 1, which is characterized in that the outer diameter of the shell is D, D
Value range be 13mm < D < 33mm, the height of shell is H, and the value range of H is 27mm < H < 80mm.
4. a kind of production method of column lithium ion batteries described in any item according to claim 1~3, which is characterized in that
Include the following steps:
(1) negative electrode of lithium ion battery makes: being coated on copper foil after slurry is made in cathode material therefor, the two-sided face of coating is close
Degree is 1.2-1.9g/dm2；Drying and processing is then carried out, carries out roll-in, compacted density 1.1-1.7g/cm after to be dried3To get
Negative electrode tab；
(2) lithium ion cell positive makes: positive material therefor, conductive agent, binder being uniformly dispersed in a solvent, after closing slurry
It is coated on aluminium foil, the two-sided surface density of coating is 2.0-4.0g/dm2；Drying and processing is then carried out, carries out roller after to be dried
Pressure, compacted density 2.5-4.3g/cm3To get positive plate；
(3) the tab setting of positive and negative electrode: the tab quantity of cathode is 2, is located at the head and the tail of step (1) resulting negative electrode tab
Both ends, and be fixed on copper foil in a welding manner；The total length of step (2) resulting positive plate is L mm, positive tab
Quantity is n, and n is the integer greater than 1 and less than 5, is arranged a tab at iL/ (n+1) respectively, and i is 1 to whole between n
Number, positive pole ear are fixed on aluminium foil in a welding manner；
(4) lithium ion battery assembles: positive plate, negative electrode tab being first cut into required size, then by the same positive plate of diaphragm, cathode
Piece is wound into the battery core of predetermined size together, then gained battery core is placed in cylindrical steel shell, injects after vacuum bakeout
Electrolyte simultaneously seals to get column lithium ion battery.
5. a kind of column lithium ion battery according to claim 4 and preparation method thereof, which is characterized in that step (1)
Described in copper foil with a thickness of H1, H1Value range be 0.004mm < H1<0.012mm。
6. a kind of column lithium ion battery according to claim 4 and preparation method thereof, which is characterized in that step (2)
Described in aluminium foil with a thickness of H2, H2Value range be 0.006mm < H2<0.020mm。
7. a kind of column lithium ion battery according to claim 4 and preparation method thereof, which is characterized in that step (3)
In each negative lug width be W1, W1Value range be 2.0mm < W1<7.0mm；The width of each positive pole ear is W2, W2
Value range be 2.0mm < W2<10.0mm。
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