CN107230801A - A kind of secure mass lithium ion battery - Google Patents
A kind of secure mass lithium ion battery Download PDFInfo
- Publication number
- CN107230801A CN107230801A CN201710583440.8A CN201710583440A CN107230801A CN 107230801 A CN107230801 A CN 107230801A CN 201710583440 A CN201710583440 A CN 201710583440A CN 107230801 A CN107230801 A CN 107230801A
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- China
- Prior art keywords
- core bag
- lithium ion
- battery
- ion battery
- positive
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of secure mass lithium ion battery, and using small core bag, by the way that current limliting connector is multiple small core bags and is connected into battery bag, 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 having safety, Large Copacity and high-power electrical property using monomer lithium ion battery produced by the present invention, the battery system structure for constituting it is simple, safe and reliable, cost is low.
Description
Technical field
Field is manufactured the present invention relates to a kind of lithium ion battery, and in particular to a kind of secure mass lithium ion battery.
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.
Generally use multiple low capacity lithium-ion battery monomers and be 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 many clusters method in parallel, to meet big energy electric automobile
The need for 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, are in use, easily cause the overcharge or overdischarge of wherein lithium ion battery, lithium-ion electric
Pond premature deterioration；And many 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.Heat is produced during due to 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.
The content of the invention
In view of the above-mentioned problems, in the present invention, it is desirable to provide pass through limit using the small core bag of battery of multiple small size low capacities
Stream connector is simultaneously unified into battery bag, separates each small core bag of battery with heat conduction baffle, solves high capacity lithium ion battery single
Large scale core bag is difficult to manufacture, radiated and safety problem.
According to the embodiment of the technology of the present invention, 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, then positive and negative extreme current limliting connector be connected respectively to positive and negative electrode end casing just,
Negative pole 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 connector and
The core bag of positive and negative electrode end casing is placed on the spill battery case bottom plate of welding heat conduction baffle, then battery case cover plate, spill electricity
Pond shell bottom plate and heat conduction baffle weld together with positive and negative electrode end casing, fluid injection, and envelope liquid injection hole is formed, it is characterised in that：Core bag
Containing multiple small core bags, 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.
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.
It is characteristic of the invention that：Using small core bag, by the way that current limliting connector is multiple small core bags and is connected into battery bag,
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 battery structure is reinforced, current limliting connector prevents each small core bag overcurrent charge or discharge, influences battery security, so that
There is safety, Large Copacity and high-power electrical property using monomer lithium ion battery produced by the present invention, the battery for constituting it
System architecture is simple, safe and reliable, cost is low.
Other features and advantages of the present invention 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
Below by example with reference, the present invention is described in detail, while passing through the effect of the comparative illustration present invention
Really.The following examples are the example for meeting the technology of the present invention content, do not illustrate that present invention is limited only to described in following examples
Content, according to the claim manufacture product belong to present invention.
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 is 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 containing 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 is connected to Positive Poles 107, negative terminal 113 is arranged on offside.
Embodiment 1
In order to illustrate the present invention, the present embodiment makes 450Ah lithium ion batteries, and profile is as shown in Figure 1.Lithium ion battery is just
Pole material generally uses LiFePO4、LiNiCoMnO2、LiNiCoAlO2、LiMn2O4, LiCoO2 or two of which mixture, bear
Pole material uses C, Li4Ti5O12, Si or its compound, Sn or its compound, electrolyte uses 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 vertical battery end-faces of heat conduction baffle 108 are welded to spill battery case bottom plate 103, respectively spill battery case bottom plate 103
It is standby into three segment spaces.
Using LiFePO4It is positive and negative electrode material with graphite C.Respectively LiFePO4Match somebody with somebody with graphite C according to certain ratio
Material, homogenate, is coated on the aluminium foil of setting and copper foil position, rolls, and is punched, 68 × 377mm, width is made and 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 stacked small core bag 104 of rectangular parallelepiped structure
Make.
The 3 small anode ear of core bag 104 is used ultrasonic bonding, or laser welding with aluminum current limliting connector 105 respectively, or
Clinching method is connected, and forms 3 small core bag 104 battery bag 111 in parallel, 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, lithium ion battery 101 is made in chemical conversion.With CC+CV (110A,
3.65V) charge, 400A constant-current discharges to 2.5V test battery capacity, measure battery capacity for 452Ah.
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
It is identical with the making battery material of embodiment 1, method and size.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 368mm；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 is by current limliting connector 105 and is unified into
Core bag 111, assembled battery 101；Charged, 400A constant-current discharges to 2.5V test battery capacity, surveyed with CC+CV (110A, 3.65V)
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
Really：Cell safety.Take visible aluminum current limliting connector 105 after battery apart to fuse, show that current limliting connector 105 plays current limliting work
With..
Embodiment 4
Using the making battery of embodiment 1, after battery is fully charged, with 1000A current discharges to 2.5V, while measuring battery
The point midway temperature of thickness and length, measures temperature at this higher than room temperature 1 DEG C.
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, thickness 146mm, width 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 measuring the point midway temperature of cell thickness and length
Degree, measures temperature at this higher than room temperature 5 DEG C.
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 is welded on spill battery case bottom plate, then band current limliting connector
On the spill battery case bottom plate that welding heat conduction baffle is placed on the core bag of positive and negative electrode end casing, 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 is formed, 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：Constitute 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 |
|---|---|---|---|
| CN201710583440.8A CN107230801A (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 |
|---|---|---|---|
| CN201710583440.8A CN107230801A (en) | 2017-07-13 | 2017-07-13 | A kind of secure mass lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107230801A true CN107230801A (en) | 2017-10-03 |
Family
ID=59956777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710583440.8A Pending CN107230801A (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) | CN107230801A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048047A (en) * | 2019-03-25 | 2019-07-23 | 开沃新能源汽车集团有限公司 | A kind of square electric cell structure |
| CN110518156A (en) * | 2019-10-23 | 2019-11-29 | 比亚迪股份有限公司 | A kind of lithium ion battery, battery modules, battery pack and automobile |
| US10777791B1 (en) | 2019-10-23 | 2020-09-15 | Byd Company Limited | Battery, battery module, battery pack and electric vehicle |
| CN112234259A (en) * | 2020-01-06 | 2021-01-15 | 蜂巢能源科技有限公司 | Battery cell manufacturing method and lithium ion battery |
| WO2021098739A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack and electric vehicle |
| WO2021098760A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack, and automobile |
-
2017
- 2017-07-13 CN CN201710583440.8A patent/CN107230801A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048047A (en) * | 2019-03-25 | 2019-07-23 | 开沃新能源汽车集团有限公司 | A kind of square electric cell structure |
| CN112787048A (en) * | 2019-10-23 | 2021-05-11 | 比亚迪股份有限公司 | Lithium ion battery, battery module, battery pack and automobile |
| US10777791B1 (en) | 2019-10-23 | 2020-09-15 | Byd Company Limited | Battery, battery module, battery pack and electric vehicle |
| US10790544B1 (en) | 2019-10-23 | 2020-09-29 | Byd Company Limited | Lithium-ion battery, battery module, battery pack, and automobile |
| WO2021077565A1 (en) * | 2019-10-23 | 2021-04-29 | 比亚迪股份有限公司 | Lithium-ion battery, battery module, battery pack, and automobile |
| CN110518156A (en) * | 2019-10-23 | 2019-11-29 | 比亚迪股份有限公司 | A kind of lithium ion battery, battery modules, battery pack and automobile |
| US11258129B2 (en) | 2019-10-23 | 2022-02-22 | Byd Company Limited | Battery, battery module, battery pack and electric vehicle |
| JP2022553078A (en) * | 2019-10-23 | 2022-12-21 | ビーワイディー カンパニー リミテッド | Lithium-ion batteries, battery modules, battery packs and automobiles |
| JP7338055B2 (en) | 2019-10-23 | 2023-09-04 | ビーワイディー カンパニー リミテッド | Lithium-ion batteries, battery modules, battery packs and automobiles |
| WO2021098739A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack and electric vehicle |
| WO2021098760A1 (en) * | 2019-11-22 | 2021-05-27 | 比亚迪股份有限公司 | Battery, battery module, battery pack, and automobile |
| CN112234259A (en) * | 2020-01-06 | 2021-01-15 | 蜂巢能源科技有限公司 | Battery cell manufacturing method and lithium ion battery |
| CN112234259B (en) * | 2020-01-06 | 2022-04-12 | 蜂巢能源科技有限公司 | Battery cell manufacturing method and lithium ion battery |
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