CN206976496U - A kind of secure mass lithium ion battery - Google Patents
A kind of secure mass lithium ion battery Download PDFInfo
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- CN206976496U CN206976496U CN201720867208.2U CN201720867208U CN206976496U CN 206976496 U CN206976496 U CN 206976496U CN 201720867208 U CN201720867208 U CN 201720867208U CN 206976496 U CN206976496 U CN 206976496U
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- core bag
- lithium ion
- battery
- positive
- ion battery
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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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Abstract
The utility model provides a kind of secure mass lithium ion battery, using small core bag, multiple small core bags and is connected into battery bag by current limliting connector, each small core bag is separated by heat conduction baffle；Core bag is simple to manufacture using small core bag, heat conduction baffle is inside battery heat derives and reinforces battery structure, current limliting connector prevents each small core bag overcurrent charge or discharge, influence battery security, so that the monomer lithium ion battery manufactured using the utility model has safety, Large Copacity and high-power electrical property, the battery system structure for forming it is simple, safe and reliable, cost is low.
Description
Technical field
It the utility model is related to a kind of lithium ion battery manufacturing field, and in particular to a kind of secure mass lithium-ion electric
Pond.
Background technology
Lithium ion battery is widely used in the fields such as electric automobile, energy storage.These application fields need lithium ion battery to have
There are safety, big energy and high power performance, and battery structure is simple.
The multiple low capacity lithium-ion battery monomers of generally use are simultaneously unified into the loong shunt of high capacity lithium ion battery block, rear string
The method of connection, or using first lithium-ion battery monomer series connection cluster, rear more clusters method in parallel, to meet big energy electric automobile
With the needs of the system such as energy storage.Multiple lithium ion battery loong shunts, because each performance of lithium ion battery is inconsistent and only one
The problems such as individual voltage measurement position, system is in use, easily cause the overcharge or overdischarge of wherein lithium ion battery, lithium-ion electric
Pond premature deterioration；And more cluster parallel connections make battery system connection line complicated, cost is high.The monomer lithium ion battery of Large Copacity, can
So that the groups of parallel connection of cell in lithium-ion battery systems is reduced or avoided.
High capacity lithium ion battery needs Large Copacity, large-sized core bag.Due to producing heat during charging, discharging electric batteries, and
The thicker battery radiating of battery is more difficult, thus the thickness of battery bag can not be excessive.Manufacture the core of long length and/or width dimensions
Bag is, it is necessary to which complicated big core packs manufacturing apparatus, and battery contains fragile deformation.In addition, single large scale Large Copacity electricity
The battery that Chi Xin bags are made, because battery capacity is high, the severe safety problems such as burning may occur for battery during external short circuit.
Utility model content
In view of the above-mentioned problems, in the utility model, it is desirable to provide led to using the small core bag of battery of multiple small size low capacities
Cross current limliting connector and be unified into battery bag, separate each small core bag of battery with heat conduction baffle, solve high capacity lithium ion battery
Single large scale core bag is difficult to manufacture, radiates and safety problem.
According to the embodiment of the utility model technology, including small core bag, core bag, heat conduction baffle, positive terminal cover plate, negative pole
End casing, current limliting connector, battery case cover plate and spill battery case bottom plate.The lithium ion battery be first by negative plate, barrier film,
Positive plate, 4 layers of barrier film winding or multi-layer stacks are made small core bag, the positive and negative lug of N number of small core bag respectively with it is positive and negative extreme
Current limliting connector is connected, and is unified into core bag, and positive and negative extreme current limliting connector is then connected respectively to positive and negative electrode end casing
On positive and negative electrode pole, the vertical battery end-face of N-1 block heat conduction baffles is welded on spill battery case bottom plate, then band current limliting is connected
The core bag of fitting and positive and negative electrode end plate be placed on welding heat conduction baffle spill battery case bottom plate on, then battery case cover plate,
Spill battery case bottom plate and heat conduction baffle weld together with positive and negative electrode end casing, fluid injection, and envelope liquid injection hole forms, and its feature exists
In：Core includes multiple small core bags, and each small core bag is by current limliting connector and is unified into core bag, each small core parlor heat conduction baffle every
Open.
Further, the small core bag quantity N of above-mentioned secure mass lithium ion battery is 2 or more than 2.
Further, the small core bag of above-mentioned secure mass lithium ion battery is stacked rectangular parallelepiped structure, or takeup type
Rectangular parallelepiped structure.
Further, the current limliting connector of above-mentioned secure mass lithium ion battery is arranged on inside battery container or outer
Portion.
Further, the current limliting connecting piece material of above-mentioned secure mass lithium ion battery is selected from aluminium, aluminium alloy, copper, nickel.
Further, the heat conduction baffle of above-mentioned secure mass lithium ion battery carries through hole, and via count is 1 or 1
More than.
Further, the heat conduction baffle material of above-mentioned secure mass lithium ion battery is selected from aluminium, aluminium alloy, stainless steel.
The characteristics of the utility model is：Using small core bag, battery multiple small core bags and is connected into by current limliting connector
Core bag, each small core bag are separated by heat conduction baffle；Core bag is simple to manufacture using small core bag, heat conduction baffle is inside battery heat
Exporting and reinforce battery structure, current limliting connector prevents each small core bag overcurrent charge or discharge, influences battery security, from
And make the monomer lithium ion battery using the utility model manufacture that there is safety, Large Copacity and high-power electrical property, make its group
Into battery system structure it is simple, safe and reliable, cost is low.
Other features and advantages of the utility model are more abundant in described below to be presented.
Brief description of the drawings
Fig. 1 secure mass lithium ion battery structure schematic diagrames
Fig. 2 secure mass lithium ion battery top views
The small core bag of the stacked rectangular parallelepiped structures of Fig. 3
The small core bag of Fig. 4 takeup type rectangular parallelepiped structures
Fig. 5 heat conduction baffle structure charts
Fig. 6 current limlitings connector is arranged on the battery outside battery container
Embodiment
The utility model is described in detail below by example with reference, while passes through this practicality of comparative illustration
New effect.The following examples are to meet the example of the utility model technology contents, do not illustrate the utility model only
It is limited to the content described in following examples, the product according to claim manufacture belongs to the utility model content.
Fig. 1 describes secure mass lithium ion battery structure schematic diagram, the visible battery case cap of the schematic diagram of lithium ion battery 101
Plate 102, spill battery case bottom plate 103, small core bag 104, current limliting connector 105, equipped with positive terminal 107, liquid injection hole 109 and sealing
The positive terminal cover plate 106 of part 110, heat conduction baffle 108, by small core bag 104 by current limliting connector 105 and the core bag 111 that is unified into,
Negative pole end casing 112 equipped with negative terminal 113.Fig. 2 describes secure mass lithium ion battery top view, lithium ion battery 101
The visible battery case cover plate 102 of profile, spill battery case bottom plate 103, small core bag 104, current limliting connector 105, heat conduction baffle 108,
Liquid injection hole seal 110, positive terminal 107.Fig. 3 states the stacked small core bag of rectangular parallelepiped structure, and small core bag 104 is by barrier film, outside
The positive plate order lamination of negative plate, barrier film, outer side edges with plain edge of sideband plain edge is then.Fig. 4 states takeup type cuboid knot
The small core bag of structure, small core bag 104 are wound by the positive plate of the negative plate of barrier film, outer side edges with plain edge, barrier film and outer side edges with plain edge
Form.Fig. 5 describes heat conduction baffle structure chart, the slabbing of heat conduction baffle 108, and contains through hole 501, is easy to electrolyte multiple small
Flowed between core bag 104.Fig. 6 describes battery of the current limliting connector outside battery container, in the battery of lithium ion battery 101
Current limliting connector 105 is installed outside housing, and current limliting connector 105 is connected to Positive Poles 107, negative terminal 113 is arranged on pair
Side.
Embodiment 1
In order to illustrate the utility model, the present embodiment makes 450Ah lithium ion batteries, and profile is as shown in Figure 1.Lithium-ion electric
Pond positive electrode generally use LiFePO4、LiNiCoMnO2、LiNiCoAlO2、LiMn2O4, LiCoO2 or two of which mixing
Thing, negative material use C, Li4Ti5O12, Si or its compound, Sn or its compound, electrolyte use 1.2MLiPF6+EC+
EMC, barrier film using PE films, PP films, PP/PE films, scribble SiO2Or Ai2O3PE composite membranes.
Pre-production bandLiquid injection hole 109, be equipped withThe aluminium positive terminal cover plate 106 of aluminium positive terminal 107；Dress
HaveThe aluminum honeycomb end casing 112 of copper negative terminal 113；Aluminium and copper limit are made respectively with thickness 2mm aluminium flakes and 1mm copper sheets
Flow connector 105；48 × 405mm, 2, band are made with thickness 2mm aluminium flakesThe heat conduction baffle 108 of through hole 501；Use thickness
0.8mm aluminium flakes make 225 × 410mm battery cases cover plate 102 and 225 × 410mm depths 48mm spill battery case bottom plate respectively
103；2 pieces of 108 vertical battery end-faces of heat conduction baffle are welded on spill battery case bottom plate 103, respectively spill battery case bottom plate
108 into three parts space, standby.
Using LiFePO4It is positive and negative electrode material with graphite C.Respectively LiFePO4Match somebody with somebody with graphite C according to certain ratio
Material, it is homogenized, on aluminium foil and copper foil position coated in setting, rolls, is punched, 68 × 377mm is made, width leaves one
Make collector 11mm it is wide be not coated with LiFePO4Plain edge positive plate, 70 × 378mm, width leave one and make afflux
The cathode pole piece of the plain edge of non-the graphitization wide 10mm of body, PE barrier films cut into 72 × 370mm diaphragms, then according to barrier film
Piece, cathode pole piece, diaphragm and positive plate order build up the small core bags of thickness 48mm；With ultrasonic bonding, or laser welding, or riveting
Connect method to be respectively connected as a single entity the positive and negative plate plain edge of small core bag, complete the system of the small core bag 104 of stacked rectangular parallelepiped structure
Make.
The 3 small anode ear of core bag 104 respectively with the ultrasonic bonding of aluminum current limliting connector 105, or laser welding, or
Clinching method connects, and forms the battery bag 111 in parallel of 3 small core bag 104, then with ultrasonic bonding, or laser welding, or
Clinching method connection aluminum current limliting connector 105 and Positive Poles 107；Similarly, the 3 small negative electrode lug of core bag 104 is used respectively
Ultrasonic bonding, or laser welding, or clinching method connect copper current limliting connector 105, and are connected to negative pole pole 113.
Core bag 111 with positive terminal cover plate 106 and negative pole end casing 112 is placed into welded heat conduction baffle 108
In spill battery case bottom plate 103, battery case cover plate 102 is covered, with laser welding positive terminal cover plate 106, negative pole end casing
112nd, battery case cover plate 102 and spill battery case bottom plate 103 are integrally welded, then dry, and inject 1.2MLiPF6+EC+EMC
Electrolyte, with the envelope liquid injection hole 109 of liquid injection hole seal 110, chemical conversion, lithium ion battery 101 is made.With CC+CV (110A,
3.65V) charge, 400A constant-current discharges to 2.5V test battery capacity, and it is 452Ah to measure battery capacity.
Embodiment 2
450Ah lithium ion batteries are made, profile is as shown in Figure 1.In addition to small core bag uses takeup type rectangular parallelepiped structure, its
Its making battery material with embodiment 1, method and size are identical.Positive and negative plate application width and plain edge broadband and embodiment 1
It is identical；The positive and negative electrode pole piece of entire volume cuts into the wide positive plate volumes and cathode pole piece volume of 377mm and 378mm, entire volume barrier film respectively
It is cut into the wide diaphragm volumes of 370mm；With winder winding into thickness 8mm, length 388mm, width 72mm core, 6 core
The positive and negative plate plain edge of core is connected as a single entity respectively with ultrasonic bonding, or laser welding, or clinching method, winding is made
The small core bag 104 of formula rectangular parallelepiped structure；With the same procedure of embodiment 1,3 small core bag 104 by current limliting connector 105 and is unified into
Core bag 111, assembled battery 101；Charged with CC+CV (110A, 3.65V), 400A constant-current discharges to 2.5V test battery capacity, survey
It is 451Ah to obtain battery capacity.
Embodiment 3
The battery made using embodiment 1, after battery is fully charged, external short-circuit of battery experiment, experiment knot are carried out with wire
Fruit：Cell safety.Visible aluminum current limliting connector 105 fuses after taking battery apart, shows that current limliting connector 105 plays current limliting work
With.
Embodiment 4
The battery made using embodiment 1, after battery is fully charged, with 1000A current discharges to 2.5V, while measures battery
The point midway temperature of thickness and length, it is higher than room temperature 1 DEG C to measure temperature at this.
Comparative example 1
Using the small core bag 104 of the identical of embodiment 1, the 3 small lamination of core bag 104 into the core bag of battery, then load wall
In thick 0.8mm, thick 146mm, wide 73mm and long 410mm aluminum cells shell, then method same as Example 1 is core bag collector
Positive and negative electrode with positive and negative electrode end cap battery positive and negative electrode pole welding together with, then positive and negative electrode end cap respectively with battery case
Welding together, dries battery core, injection embodiment 1 identical electrolyte, seals liquid injection hole with liquid injection hole seal, chemical conversion, be made lithium from
Sub- battery.After battery is fully charged, with 1000A current discharges to 2.5V, while the point midway temperature of cell thickness and length is measured
Degree, it is higher than room temperature 5 DEG C to measure temperature at this.
Claims (7)
1. a kind of secure mass lithium ion battery, including：Small core bag, core bag, heat conduction baffle, positive terminal cover plate, negative pole end cap
Plate, current limliting connector, battery case cover plate and spill battery case bottom plate；The lithium ion battery is first by negative plate, barrier film, positive pole
Piece, 4 layers of barrier film winding or multi-layer stacks are made small core bag, the positive and negative lug of N number of small core bag respectively with positive and negative extreme current limliting
Connector is connected, and is unified into core bag, and then positive and negative extreme current limliting connector is connected respectively on positive and negative electrode end casing
Positive and negative electrode pole, the vertical battery end-face of N-1 block heat conduction baffles are welded on spill battery case bottom plate, then band current limliting connector
It is placed on the core bag of positive and negative electrode end casing on the spill battery case bottom plate of welding heat conduction baffle, then battery case cover plate, recessed
Shape battery case bottom plate and heat conduction baffle weld together with positive and negative electrode end casing, fluid injection, and envelope liquid injection hole forms, it is characterised in that：
Core includes multiple small core bags, and each small core bag is by current limliting connector and is unified into core bag, and each small core parlor is separated with heat conduction baffle.
2. secure mass lithium ion battery according to claim 1, it is characterised in that：Form the small core bag quantity of core bag
N is 2 or more than 2.
3. secure mass lithium ion battery according to claim 1, it is characterised in that：Small core bag is stacked cuboid
Structure, or takeup type rectangular parallelepiped structure.
4. secure mass lithium ion battery according to claim 1, it is characterised in that：Current limliting connector is arranged on battery
Enclosure interior or outside.
5. secure mass lithium ion battery according to claim 1, it is characterised in that：Current limliting connecting piece material is selected from
Aluminium, aluminium alloy, copper, nickel.
6. secure mass lithium ion battery according to claim 1, it is characterised in that：Heat conduction baffle carries through hole, leads to
Hole count is 1 or more than 1.
7. secure mass lithium ion battery according to claim 1, it is characterised in that：Heat conduction baffle material be selected from aluminium,
Aluminium alloy, stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867208.2U CN206976496U (en) | 2017-07-13 | 2017-07-13 | A kind of secure mass lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867208.2U CN206976496U (en) | 2017-07-13 | 2017-07-13 | A kind of secure mass lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN206976496U true CN206976496U (en) | 2018-02-06 |
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ID=61401759
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720867208.2U Active CN206976496U (en) | 2017-07-13 | 2017-07-13 | A kind of secure mass lithium ion battery |
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| Country | Link |
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| CN (1) | CN206976496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230801A (en) * | 2017-07-13 | 2017-10-03 | 庄新国 | A kind of secure mass lithium ion battery |
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2017
- 2017-07-13 CN CN201720867208.2U patent/CN206976496U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230801A (en) * | 2017-07-13 | 2017-10-03 | 庄新国 | A kind of secure mass lithium ion battery |
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