CN107394274A - A kind of method for reducing ternary system electrokinetic cell internal moisture - Google Patents
A kind of method for reducing ternary system electrokinetic cell internal moisture Download PDFInfo
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- CN107394274A CN107394274A CN201710423788.0A CN201710423788A CN107394274A CN 107394274 A CN107394274 A CN 107394274A CN 201710423788 A CN201710423788 A CN 201710423788A CN 107394274 A CN107394274 A CN 107394274A
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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
- H01M10/058—Construction or manufacture
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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
- H01M10/04—Construction or manufacture in general
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a kind of method for reducing ternary system electrokinetic cell internal moisture, and this method comprises the following steps：A, battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized；B, it is filled with nitrogen into the cavity vacuumized；C, nitrogen is filled with baking oven to be heated；D, after being heated to certain time, vacuumized in cavity, continue to heat while vacuumizing；E, with step d, continue to vacuumize and heat；F, after being heated to certain time, to being filled with nitrogen again in cavity；G, to being vacuumized again in cavity；H, step d g recycling is run twice；I, nitrogen cooling is filled with oven cavity body.The method of reduction ternary system electrokinetic cell internal moisture described in the invention improves the performance of production efficiency and battery core, reduces production cost.
Description
Technical field
The invention belongs to electrokinetic cell production technical field, and ternary system electrokinetic cell is reduced more particularly, to one kind
The method of internal moisture.
Background technology
Under existing ternary system electrokinetic cell production model, pole piece is often once toasted before lamination, for dropping
The moisture of low pole piece, complete assembling fluid injection when battery and go to contact once to be toasted so that pole piece moisture before fluid injection
As far as possible than relatively low, low moisture pole piece stands the infiltration for the identical time being more conducive to electrolyte after fluid injection, meanwhile, it is follow-up in battery
In first charge-discharge activation, lithium ion occurs instead with electrolyte in the solid liquid interface of cell negative electrode material and electrolyte
Should, in negative material Surface Creation SEI films, the quality that SEI films are formed is directly connected to the performance of lithium ion battery, and pole piece
Moisture not only directly influences the formational situation of battery SEI films, can also be reacted with the lithium hexafluoro phosphate in electrolyte
Generation has corrosive hydrofluoric acid, and then Membrane Oxygenation so as to influenceing the chemical property of battery.
The content of the invention
In view of this, the invention is directed to a kind of method for reducing ternary system electrokinetic cell internal moisture, with
Solve the above problems, improve the performance of production efficiency and battery core, reduce production cost.
To reach above-mentioned purpose, what the technical scheme of the invention was realized in：
A kind of method for reducing ternary system electrokinetic cell internal moisture, this method comprise the following steps：
A, battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized, made in oven cavity body
Vacuum terminate to vacuumize when reaching 1000-7000PA；
B, nitrogen is filled with into the cavity vacuumized, makes the vacuum in cavity terminate to fill when reaching 80000-90000PA
Enter nitrogen, during nitrogen is filled with, the gas in air blower work stir chamber body, nitrogen is evenly distributed in cavity；
C, nitrogen is filled with baking oven, pole piece is under nitrogen protection and avoids contacting oxidation at high temperatures with oxygen, heating
During be constantly filled with nitrogen and air blast, ensure the heating-up temperature in cavity within the scope of required；
D, after being heated to certain time, vacuumized in cavity, vacuum reaches 100-200PA, in the true of this scope
The boiling point of water is 7-20 DEG C under reciprocal of duty cycle, i.e. moisture in pole piece evaporates quickly, cavity temperature meeting while due to vacuumizing
Moment reduces, therefore continues to heat while vacuumizing；
E, with step d, continue to vacuumize and heat, while air blast, the vacuum in cavity reaches 100-200PA；
F, after being heated to certain time, to being filled with nitrogen again in cavity, the vacuum in cavity is made to reach 80000-
Stop being filled with nitrogen during 90000PA, during nitrogen is filled with while carry out air blast；
G, stop vacuumizing to vacuumizing again in cavity, when the vacuum in cavity reaches 1000-7000PA, fill
The moisture volatilized in pole piece is mainly taken away in the effect for entering nitrogen, and nitrogen enters again after fully being contacted with the moisture in cavity
Row vacuumizes extracts cavity out the nitrogen with moisture；
H, step d-g recycling is run twice；
I, nitrogen cooling is filled with oven cavity body, the nitrogen for absorbing heat enters cooling tube cooling, the nitrogen cooled
Gas, which is again introduced into cavity, to absorb heat, circulating working time 100-180min, and after the working time for reaching setting, nitrogen stops following
Ring, cooling terminate, and the gas in the uniform cavity of air blast is carried out while nitrogen circulation.
Further, the working time vacuumized in the step a is 10-60min.
Further, the working time for nitrogen being filled with the step b is 10-30min.
Further, the time heated in the step c is 100-180min, and the vacuum in cavity is 80000-
90000PA。
Further, the pumpdown time in the step d and step e is 20-60min.
Further, the time for nitrogen being filled with the step f is 10-30min.
Further, the time vacuumized in the step g is 10-60min.
Further, the vacuum in the step i lumen bodies is 80000-90000PA.
Further, in described step c, d and e when drying the pole piece of anode, heating-up temperature is 105-115 DEG C.
Further, in described step c, d and e when drying the pole piece of GND, heating-up temperature is 85-95 DEG C.
Relative to prior art, a kind of method of reduction ternary system electrokinetic cell internal moisture described in the invention
Have the advantage that：
Baking of the method for the present invention for reducing ternary system electrokinetic cell internal moisture to pole piece has carried out technology
Transformation, while reducing infiltration of the moisture promotion electrolyte of pole piece to positive/negative plate, traditional vacuum type twice is dried
The roasting nitrogen type baking being changed to once, foreshortens to 8-12 hours by baking time, production production capacity is improved 50%-60%, and
And the production capacity of production and the performance of battery core are substantially increased, reduce production cost.
Brief description of the drawings
The accompanying drawing for forming the part of the invention is used for providing further understanding the invention, present invention wound
The schematic description and description made is used to explain the invention, does not form the improper restriction to the invention.
In accompanying drawing：
Fig. 1 is the process chart of the reduction ternary system electrokinetic cell internal moisture described in the invention embodiment.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the invention can
To be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For the limitation to the invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the invention
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the invention.
Describe the invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, a kind of method for reducing ternary system electrokinetic cell internal moisture, this method comprise the following steps：
A, battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized, made in oven cavity body
Vacuum terminate to vacuumize when reaching 1000-7000PA, the working time vacuumized is 10-60min；
B, nitrogen is filled with into the cavity vacuumized, makes the vacuum in cavity terminate to fill when reaching 80000-90000PA
Enter nitrogen, the working time for being filled with nitrogen is 10-30min, during nitrogen is filled with, in air blower work stir chamber body
Gas, nitrogen is set to be evenly distributed in cavity；
C, nitrogen is filled with baking oven, pole piece is under nitrogen protection and avoids contacting oxidation at high temperatures with oxygen, heating
During be constantly filled with nitrogen and air blast, ensure the heating-up temperature in cavity within the scope of required, the time of heating is
100-180min, the vacuum in cavity is 80000-90000PA；
D, after being heated to certain time, vacuumized in cavity, vacuum reaches 100-200PA, and the pumpdown time is equal
For 20-60min, the boiling point of water is 7-20 DEG C under the vacuum of this scope, i.e. moisture in pole piece evaporates quickly, due to
Cavity temperature can reduce moment while vacuumizing, therefore continue to heat while vacuumizing；
E, with step d, continue to vacuumize and heat, while air blast, the vacuum in cavity reaches 100-200PA；
F, after being heated to certain time, to being filled with nitrogen again in cavity, the vacuum in cavity is made to reach 80000-
Stop being filled with nitrogen during 90000PA, the time for being filled with nitrogen is 10-30min, during nitrogen is filled with while is roused
Wind；
G, stop vacuumizing to vacuumizing again in cavity, when the vacuum in cavity reaches 1000-7000PA, take out
The time of vacuum is 10-60min, and the moisture that is volatilized in pole piece is mainly taken away in the effect for being filled with nitrogen, nitrogen with cavity
Interior moisture is vacuumized again after fully contacting extracts cavity out the nitrogen with moisture；
H, step d-g recycling is run twice；
I, it is filled with nitrogen in oven cavity body to cool down, the vacuum in cavity is 80000-90000PA, absorbs the nitrogen of heat
Gas enters cooling tube cooling, and the nitrogen cooled, which is again introduced into cavity, to absorb heat, and circulating working time 100-180min, arrives
Up to after the working time of setting, nitrogen stops circulation, and cooling terminates, and is carried out while nitrogen circulation in the uniform cavity of air blast
Gas.
To ensure to realize pole piece low moisture, the baking time of existing pole piece is about in 6-10 hours, and pole piece after having assembled
Wrapped up by barrier film, the outermost layer of whole group core bag has aluminum plastic film parcel again, causes moisture pole during the baking of core bag to be not easy to bake out, core bag
Baking time is most of between 12-24 hours, and the total baking time of such pole piece influences enterprise within 18-34 hours
Production capacity, toasted using this method, greatly saved baking time, saved production cost.
Embodiment 1：
When the pole piece of drying is as anode pole piece, when step c, the heating-up temperature in d and e is disposed as 110 DEG C, a first,
Battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized, reaches the vacuum in oven cavity body
Terminate to vacuumize during to 2000PA, the working time vacuumized is 15min；B, nitrogen is filled with into the cavity vacuumized, makes chamber
Internal vacuum terminates to be filled with nitrogen when reaching 80000PA, and the working time for being filled with nitrogen is 12min, is being filled with nitrogen
During, the gas in air blower work stir chamber body, nitrogen is evenly distributed in cavity；C, nitrogen is filled with baking oven,
Make pole piece be under nitrogen protection to avoid contacting oxidation at high temperatures with oxygen, nitrogen and drum are constantly filled with during heating
Wind, ensure the heating-up temperature in cavity within the scope of required, time of heating is 120min, and the vacuum in cavity is
80000PA；D, after heating 120min, being vacuumized in cavity, vacuum reaches 120PA, and the pumpdown time is 40min,
The boiling point of water is 7-20 DEG C under the vacuum of this scope, i.e. moisture in pole piece evaporates quickly, same due to what is vacuumized
When cavity temperature can reduce moment, e therefore continue to heat while vacuumizing, continue to vacuumize and heat, during heating
Between be 30min, while air blast, the vacuum in cavity reaches 100PA；F, after heating 30min, to being filled with nitrogen again in cavity
Gas, the vacuum in cavity is set to stop being filled with nitrogen when reaching 80000PA, the time for being filled with nitrogen is 30min, is being filled with nitrogen
During simultaneously carry out air blast；G, and then to being vacuumized again in cavity, when the vacuum in cavity reaches 2000PA
Stopping vacuumizes, and the time vacuumized is 60min, and the moisture volatilized in pole piece, nitrogen are mainly taken away in the effect for being filled with nitrogen
Gas is vacuumized again after fully being contacted with the moisture in cavity extracts cavity out the nitrogen with moisture, then step d-
G recycling operation twice, is filled with nitrogen and cooled down, the vacuum in cavity is 80000PA, absorbs heat in last i, oven cavity body
The nitrogen of amount enters cooling tube cooling, and the nitrogen cooled, which is again introduced into cavity, to absorb heat, circulating working time 120min,
After the working time for reaching setting, nitrogen stops circulation, and cooling terminates, and is carried out while nitrogen circulation in the uniform cavity of air blast
Gas.
Embodiment 2：
When the pole piece of drying is as cathode pole piece, when step c, the heating-up temperature in d and e is disposed as 90 DEG C, a first,
Battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized, reaches the vacuum in oven cavity body
Terminate to vacuumize during to 4000PA, the working time vacuumized is 10min；B, nitrogen is filled with into the cavity vacuumized, makes chamber
Internal vacuum terminates to be filled with nitrogen when reaching 85000PA, and the working time for being filled with nitrogen is 15min, is being filled with nitrogen
During, the gas in air blower work stir chamber body, nitrogen is evenly distributed in cavity；C, nitrogen is filled with baking oven,
Make pole piece be under nitrogen protection to avoid contacting oxidation at high temperatures with oxygen, nitrogen and drum are constantly filled with during heating
Wind, ensure the heating-up temperature in cavity within the scope of required, time of heating is 120min, and the vacuum in cavity is
85000PA；D, after heating 100min, being vacuumized in cavity, vacuum reaches 150PA, and the pumpdown time is 30min,
The boiling point of water is 7-20 DEG C under the vacuum of this scope, i.e. moisture in pole piece evaporates quickly, same due to what is vacuumized
When cavity temperature can reduce moment, e therefore continue to heat while vacuumizing, continue to vacuumize and heat, during heating
Between be 25min, while air blast, the vacuum in cavity reaches 150PA；F, after heating 25min, to being filled with nitrogen again in cavity
Gas, the vacuum in cavity is set to stop being filled with nitrogen when reaching 85000PA, the time for being filled with nitrogen is 20min, is being filled with nitrogen
During simultaneously carry out air blast；G, and then to being vacuumized again in cavity, when the vacuum in cavity reaches 4000PA
Stopping vacuumizes, and the time vacuumized is 45min, and the moisture volatilized in pole piece, nitrogen are mainly taken away in the effect for being filled with nitrogen
Gas is vacuumized again after fully being contacted with the moisture in cavity extracts cavity out the nitrogen with moisture, then step d-
G recycling operation twice, is filled with nitrogen and cooled down, the vacuum in cavity is 85000PA, absorbs heat in last i, oven cavity body
The nitrogen of amount enters cooling tube cooling, and the nitrogen cooled, which is again introduced into cavity, to absorb heat, circulating working time 100min,
After the working time for reaching setting, nitrogen stops circulation, and cooling terminates, and is carried out while nitrogen circulation in the uniform cavity of air blast
Gas.
The preferred embodiment of the invention is the foregoing is only, is not intended to limit the invention creation, it is all at this
Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc., the invention should be included in
Protection domain within.
Claims (10)
- A kind of 1. method for reducing ternary system electrokinetic cell internal moisture, it is characterised in that：This method comprises the following steps：A, battery pole piece is placed in baking oven, the baking oven cavity where pole piece is vacuumized, made true in oven cavity body Reciprocal of duty cycle terminates to vacuumize when reaching 1000-7000PA；B, nitrogen is filled with into the cavity vacuumized, makes the vacuum in cavity terminate to be filled with nitrogen when reaching 80000-90000PA Gas, during nitrogen is filled with, the gas in air blower work stir chamber body, nitrogen is set to be evenly distributed in cavity；C, nitrogen is filled with baking oven, pole piece is under nitrogen protection and avoids contacting oxidation at high temperatures with oxygen, in the mistake of heating Nitrogen and air blast are constantly filled with journey, ensures the heating-up temperature in cavity within the scope of required；D, after being heated to certain time, vacuumized in cavity, vacuum reaches 100-200PA, in the vacuum of this scope The boiling point of lower water is 7-20 DEG C, i.e. moisture in pole piece evaporates quickly, and cavity temperature can moment while due to vacuumizing Reduce, therefore continue to heat while vacuumizing；E, with step d, continue to vacuumize and heat, while air blast, the vacuum in cavity reaches 100-200PA；F, after being heated to certain time, to being filled with nitrogen again in cavity, the vacuum in cavity is made to reach 80000-90000PA When stop being filled with nitrogen, during nitrogen is filled with while carry out air blast；G, stop vacuumizing to vacuumizing again in cavity, when the vacuum in cavity reaches 1000-7000PA, be filled with nitrogen The moisture volatilized in pole piece is mainly taken away in the effect of gas, and nitrogen is taken out again after fully being contacted with the moisture in cavity Nitrogen with moisture is extracted out cavity by vacuum；H, step d-g recycling is run twice；I, nitrogen cooling is filled with oven cavity body, the nitrogen for absorbing heat enters cooling tube cooling, and the nitrogen cooled is again Secondary to enter heat absorption in cavity, circulating working time 100-180min, after the working time for reaching setting, nitrogen stops circulation, Cooling terminates, and the gas in the uniform cavity of air blast is carried out while nitrogen circulation.
- A kind of 2. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 10-60min to state the working time vacuumized in step a.
- A kind of 3. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 10-30min to state and be filled with working time of nitrogen in step b.
- A kind of 4. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 100-180min to state the time heated in step c, and the vacuum in cavity is 80000-90000PA.
- A kind of 5. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 20-60min to state the pumpdown time in step d and step e.
- A kind of 6. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 10-30min to state and be filled with time of nitrogen in step f.
- A kind of 7. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 10-60min to state the time vacuumized in step g.
- A kind of 8. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute It is 80000-90000PA to state the vacuum in step i lumen bodies.
- A kind of 9. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that：Institute State in step c, d and e when drying the pole piece of anode, heating-up temperature is 105-115 DEG C.
- A kind of 10. method for reducing ternary system electrokinetic cell internal moisture according to claim 1, it is characterised in that： In described step c, d and e when drying the pole piece of GND, heating-up temperature is 85-95 DEG C.
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| CN201710423788.0A CN107394274A (en) | 2017-06-07 | 2017-06-07 | A kind of method for reducing ternary system electrokinetic cell internal moisture |
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| CN201710423788.0A CN107394274A (en) | 2017-06-07 | 2017-06-07 | A kind of method for reducing ternary system electrokinetic cell internal moisture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668380A (en) * | 2018-12-12 | 2019-04-23 | 肇庆遨优动力电池有限公司 | A kind of high ni-type ternary material NCM811 pole piece baking method |
| CN112864463A (en) * | 2020-12-31 | 2021-05-28 | 合肥国轩高科动力能源有限公司 | Rapid baking method of square lithium ion battery |
| CN115014045A (en) * | 2022-05-30 | 2022-09-06 | 江西安驰新能源科技有限公司 | Lithium battery cell baking process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185157A (en) * | 2011-03-22 | 2011-09-14 | 宁波海锂子新能源有限公司 | Production process of waterborne positive lithium ion battery |
| CN105226326A (en) * | 2014-06-17 | 2016-01-06 | 中山天贸电池有限公司 | A kind of method of lithium rechargeable battery battery core quick baking |
-
2017
- 2017-06-07 CN CN201710423788.0A patent/CN107394274A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185157A (en) * | 2011-03-22 | 2011-09-14 | 宁波海锂子新能源有限公司 | Production process of waterborne positive lithium ion battery |
| CN105226326A (en) * | 2014-06-17 | 2016-01-06 | 中山天贸电池有限公司 | A kind of method of lithium rechargeable battery battery core quick baking |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668380A (en) * | 2018-12-12 | 2019-04-23 | 肇庆遨优动力电池有限公司 | A kind of high ni-type ternary material NCM811 pole piece baking method |
| CN112864463A (en) * | 2020-12-31 | 2021-05-28 | 合肥国轩高科动力能源有限公司 | Rapid baking method of square lithium ion battery |
| CN115014045A (en) * | 2022-05-30 | 2022-09-06 | 江西安驰新能源科技有限公司 | Lithium battery cell baking process |
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Application publication date: 20171124 |