CN112290169A - Lithium ion battery liquid injection device and method - Google Patents
Lithium ion battery liquid injection device and method Download PDFInfo
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- CN112290169A CN112290169A CN202010247143.8A CN202010247143A CN112290169A CN 112290169 A CN112290169 A CN 112290169A CN 202010247143 A CN202010247143 A CN 202010247143A CN 112290169 A CN112290169 A CN 112290169A
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- lithium ion
- ion battery
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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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- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention relates to the technical field of lithium ion batteries, and provides a liquid injection device and a liquid injection method for a lithium ion battery. The electrolyte injection device of the lithium ion battery comprises an electrolyte tank, the lithium ion battery and a vacuumizing unit, wherein cover plates are respectively arranged at two ends of the lithium ion battery along the length direction of the lithium ion battery, a first electrolyte injection hole and a second electrolyte injection hole are respectively arranged on the cover plates at the two ends of the lithium ion battery, the electrolyte tank is connected with the first electrolyte injection hole so as to inject electrolyte into the interior of the lithium ion battery, and the vacuumizing unit is arranged to vacuumize the interior of the lithium ion battery through the second electrolyte injection hole. According to the lithium ion battery liquid injection device, the interior of the battery can be simultaneously vacuumized and injected with liquid through the liquid injection holes at the two ends in the length direction of the battery in the liquid injection process, so that the liquid injection time is greatly reduced, the liquid injection efficiency and quality of the battery are effectively improved, the electrolyte can be injected into the battery with a longer length, the pole piece of the battery can uniformly absorb the electrolyte, and the infiltration effect of the battery is improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a liquid injection device and a liquid injection method for a lithium ion battery.
Background
The lithium ion battery has the advantages of less self-discharge, high energy density and the like, and occupies the core position of the power battery. The lithium ion battery is internally composed of a positive electrode, a negative electrode, a diaphragm and electrolyte, wherein the electrolyte injection technology of the lithium ion battery is an important factor influencing the batch production, the battery performance and the cost control of the lithium ion battery.
At present, the liquid injection method of the lithium ion battery generally vacuumizes the inside of the battery, and utilizes the vacuum difference between the inside and the outside of the battery cavity to achieve the purpose of self-priming liquid injection, namely a negative pressure self-priming liquid injection mode. However, it is difficult to manufacture a lithium ion battery with excellent performance by the existing process technology, and as for the liquid injection process, as many as five to six hundred grams or even more of electrolyte needs to be accurately injected into the battery within a limited time, and the current circulating negative pressure pumping mode is difficult to realize. In addition, the battery only has a liquid injection hole formed in the top of the battery at present, so that the battery is required to be vacuumized and then injected, and fine bubbles are easily formed at four corners of the bottom of the battery and are not pumped away in the process of injecting electrolyte, so that the performance of the battery is affected.
In addition, as the requirements on the height of the lithium ion battery for people are more and more strict and the endurance mileage is higher, the long battery core slowly becomes a new field which is preempted by various lithium ion battery manufacturing enterprises. For a long electric core, the pole columns are arranged at two ends of the battery, the electrolyte is difficult to be injected into the battery by the conventional electrolyte injection mode, the large internal cavity also needs the electrolyte injection equipment to have higher vacuumizing precision and speed, and meanwhile, the length of the battery with the length of more than five hundred millimeters is difficult to realize that the pole pieces can uniformly absorb the electrolyte, so that the production efficiency and the product quality are greatly reduced, and the electrolyte injection efficiency and the quality of the battery are difficult to ensure.
Disclosure of Invention
In view of this, the present invention provides a liquid injection device for a lithium ion battery, which has high liquid injection efficiency and good wetting effect.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a lithium ion battery priming device, includes electrolyte tank, lithium ion battery and evacuation unit, lithium ion battery's edge lithium ion battery length direction's both ends are equipped with the apron respectively, both ends be equipped with first notes liquid hole and second respectively on the apron and annotate the liquid hole, the electrolyte tank with first notes liquid hole link to each other in order to lithium ion battery inside pours into electrolyte into, the evacuation unit sets up to pass through the second annotates the liquid hole pair lithium ion battery inside carries out the evacuation.
Optionally, the lithium ion battery is vertically arranged along the length direction of the lithium ion battery, so that the first liquid injection hole and the second liquid injection hole are respectively located at the bottom and the top of the lithium ion battery.
Optionally, the electrolyte tank is connected with the lithium ion battery through a liquid inlet pipe, a first valve is arranged on the liquid inlet pipe, the lithium ion battery is connected with the vacuumizing unit through a vacuum pipe, and a second valve is arranged on the vacuum pipe.
Optionally, a buffer tank for collecting the electrolyte is arranged between the electrolyte tank and the vacuum pumping unit.
Optionally, the vacuum tube comprises a first vacuum tube for connecting the lithium ion battery and the buffer tank and a second vacuum tube for connecting the buffer tank and the vacuum pumping unit.
Optionally, the electrolyte tank comprises an upper cup body and a lower cup body, and the lower cup body is connected with the lithium ion battery.
Compared with the prior art, the lithium ion battery liquid injection device has the following advantages:
according to the liquid injection device for the lithium ion battery, the interior of the battery can be simultaneously vacuumized and injected with liquid through the first liquid injection hole and the second liquid injection hole which are arranged at the two ends in the length direction of the battery in the liquid injection process, so that the liquid injection time is greatly reduced, the liquid injection efficiency and quality of the battery are effectively improved, the electrolyte can be injected into the battery with a longer length, the pole piece of the battery can uniformly absorb the electrolyte, and the infiltration effect of the battery is improved.
The invention also aims to provide a lithium ion battery liquid injection method for effectively improving the battery liquid injection efficiency and quality.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a liquid injection method of a lithium ion battery specifically comprises the following steps: and injecting electrolyte into the lithium ion battery along two ends of the length direction of the lithium ion battery and vacuumizing the lithium ion battery so that the electrolyte can infiltrate the pole piece inside the lithium ion battery along the length direction of the lithium ion battery.
Optionally, the step of injecting the electrolyte is set to be performed after the inside of the lithium ion battery is vacuumized to form a negative pressure condition.
Optionally, the lithium ion battery is arranged to be vertically placed along the length direction of the lithium ion battery, so that the top of the vertically placed lithium ion battery is vacuumized, and electrolyte is injected from the bottom of the lithium ion battery.
Optionally, the liquid injection method further comprises: and after the lithium ion battery is injected, continuously vacuumizing the interior of the lithium ion battery for 10-20 s.
Compared with the prior art, the lithium ion battery liquid injection method and the lithium ion battery liquid injection device have the same advantages, and are not repeated herein.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic structural diagram of a lithium ion battery electrolyte injection device according to an embodiment of the present invention.
Description of reference numerals:
1-electrolyte tank, 2-lithium ion battery, 3-vacuum pumping unit, 4-first liquid injection hole, 5-second liquid injection hole, 6-liquid inlet pipe, 7-first valve, 8-second valve, 9-buffer tank, 10-first vacuum pipe, 11-second vacuum pipe.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
With reference to fig. 1, according to an aspect of the present invention, there is provided a lithium ion battery electrolyte injection device, including an electrolyte tank 1, a lithium ion battery 2, and a vacuum unit 3, where two ends of the lithium ion battery 2 along a length direction of the lithium ion battery 2 are respectively provided with a cover plate, the cover plates at the two ends are respectively provided with a first electrolyte injection hole 4 and a second electrolyte injection hole 5, the electrolyte tank 1 is connected to the first electrolyte injection hole 4 to inject electrolyte into the lithium ion battery 2, and the vacuum unit 3 is configured to be capable of vacuumizing the interior of the lithium ion battery 2 through the second electrolyte injection hole 5.
The lithium ion battery electrolyte injection device can simultaneously vacuumize and inject electrolyte into the battery through the first electrolyte injection hole 4 and the second electrolyte injection hole 5 at the two ends of the battery along the length direction of the battery in the electrolyte injection process, so that the electrolyte injection time is greatly reduced, and the electrolyte injection efficiency and the electrolyte injection quality of the battery are effectively improved. Meanwhile, because a single liquid injection hole is usually arranged on the lithium ion battery in the prior art, in the processes of vacuumizing and injecting liquid, the inside of the lithium ion battery is in a positive and negative pressure circulation state, the liquid injection efficiency is low, fine bubbles are easy to appear at four corners of the bottom of the battery, the liquid injection effect and the battery performance are influenced, and particularly for the lithium ion battery with longer length, the lithium ion battery with longer length has longer length and larger inner cavity, so that the situation is easier to appear.
The present application overcomes the above problems altogether. Annotate liquid hole 4 and second through the first notes liquid hole 4 along battery length direction both ends, and then realize that evacuation step and notes liquid step are gone on in step, can guarantee the completeness of the inside evacuation of lithium ion battery 2, avoid the tiny bubble to appear in the battery four corners, improve and annotate liquid quality, promote the battery performance, simultaneously because first notes liquid hole 4 and second annotate liquid hole 5 and set up the both ends at lithium ion battery 2 relatively, electrolyte can follow the notes liquid hole of one end and pour into and flow along battery length direction, make the absorption electrolyte that the pole piece of battery can be even, thereby improve the infiltration effect of battery. Wherein, the number of the first liquid injection holes is set to be at least one.
In order to further improve the infiltration effect of the battery, the lithium ion battery 2 is vertically arranged along the length direction of the lithium ion battery 2, so that the first liquid injection hole 4 and the second liquid injection hole 5 are respectively positioned at the bottom and the top of the lithium ion battery 2. Specifically, the lithium ion battery 2 extends in the longitudinal direction, i.e., in the vertical direction, as shown in fig. 1.
Through following lithium ion battery 2 bottom along lithium ion battery 2's length direction pours into electrolyte into, annotates the liquid in-process, and electrolyte can be with 2 bottoms of lithium ion battery fill back and progressively upwards soak, guarantees that electrolyte can realize totally soaking to the inside pole piece of battery, avoids the inside electrolyte that appears of lithium ion battery 2 to pour into incompletely, leaves the appearance of tiny bubble scheduling problem, effectively promotes the infiltration effect and the performance of lithium ion battery 2. Meanwhile, the electrolyte can be accurately injected into the battery within a limited time by the arrangement mode of the electrolyte injection hole.
In addition, in order to realize the effects of liquid injection and vacuum pumping, the electrolyte tank 1 is connected with the lithium ion battery 2 through a liquid inlet pipe 6, the liquid inlet pipe 6 is provided with a first valve 7, the lithium ion battery 2 is connected with the vacuum pumping unit 3 through a vacuum pipe, and the vacuum pipe is provided with a second valve 8. In the liquid injection process, the second valve 8 and the vacuumizing unit 3 are opened firstly, the second liquid injection hole 5 at the top of the battery is vacuumized to form negative pressure inside the battery, the first valve 7 is opened later, the electrolyte is smoothly injected into the battery through the first liquid injection hole 4 at the bottom of the battery, and the electrode plates are infiltrated along the length direction of the battery, so that the infiltration effect is ensured. After the liquid injection is finished, the first valve 7 is closed, and the vacuumizing unit 3 continues to vacuumize for 10s-20s so as to completely pump out the redundant gas in the battery. In the present embodiment, the vacuum-pumping unit 3 is a vacuum pump.
It should be noted that, in order to prevent the electrolyte from being pumped into the vacuum pump to corrode the vacuum pump during the vacuum pumping process, a buffer tank 9 for collecting the electrolyte is arranged between the electrolyte tank 1 and the vacuum pumping unit 3. The electrolyte and gas pumped out during the vacuum pumping can be collected by the buffer tank 9. Further, the vacuum tubes comprise a first vacuum tube 10 for connecting the lithium ion battery 2 and the buffer tank 9 and a second vacuum tube 11 for connecting the buffer tank 9 and the vacuum pumping unit 3. Wherein, first vacuum tube 10 sets up to the bottom that can extend to buffer tank 9 to do benefit to and carry electrolyte, avoid taking place to collapse among the transportation process and spatter, and second vacuum tube 11 entry is located buffer tank 9's top, thereby guarantee that evacuation unit 3 can only extract gas, avoid electrolyte to be taken out and cause the corruption to evacuation unit 3.
In addition, in order to control the amount of electrolyte injected, the electrolyte tank 1 includes an upper cup and a lower cup, and the lower cup is connected to the lithium ion battery 2.
The second aspect of the present invention provides a lithium ion battery electrolyte injection method, which specifically comprises: and injecting electrolyte into the lithium ion battery 2 and vacuumizing the lithium ion battery 2 along two ends of the lithium ion battery 2 in the length direction so that the electrolyte can infiltrate the pole piece in the lithium ion battery 2 in the length direction of the lithium ion battery 2. In the invention, the interior of the battery is simultaneously vacuumized and injected with liquid through the liquid injection holes at the two ends along the length direction of the battery, so that the liquid injection time is greatly reduced, the liquid injection efficiency and the liquid injection quality of the battery are effectively improved, and meanwhile, the electrolyte can be injected along the length direction of the battery, and the injection mode is more suitable for the lithium ion battery 2 with longer length, so that the pole piece of the battery can uniformly absorb the electrolyte, the infiltration effect of the battery is improved, and the performance of the battery is ensured.
The step of injecting the electrolyte is set to be performed after the inside of the lithium ion battery 2 is vacuumized to form a negative pressure condition. In other words, earlier to the inside evacuation formation negative pressure of battery, will do benefit to electrolyte and be inhaled lithium ion battery 2's inside afterwards, thereby improve and annotate liquid efficiency, afterwards, evacuation and notes liquid go on in step, guarantee that lithium ion battery 2's inside is in the negative pressure state all the time, inside lithium ion battery 2 was injected into in the circulation that electrolyte can last like this, be convenient for electrolyte from lithium ion battery 2's one end to the other end flow injection, avoid because the inside cavity of battery is great and the incomplete problem appears pouring into, can realize that the longer lithium ion battery 2's of length electrolyte pours into, guarantee to annotate the liquid velocity of flow and stabilize.
In order to improve the infiltration effect, the lithium ion battery 2 is vertically arranged along the length direction of the lithium ion battery 2, so that the top of the vertically arranged lithium ion battery 2 is vacuumized, and electrolyte is injected from the bottom of the lithium ion battery 2. And further, the pole pieces are gradually soaked by the electrolyte from the bottom of the lithium ion battery 2 along the length direction of the battery, and the soaking effect of the pole pieces is ensured.
In this embodiment, the liquid injection method further includes: and after the liquid injection of the lithium ion battery 2 is finished, continuously vacuumizing the interior of the lithium ion battery 2 for 10-20s, so that redundant gas in the battery is completely pumped out, and the performance of the battery is improved.
With reference to the liquid injection device of the lithium ion battery shown in fig. 1, the liquid injection method of the present invention specifically includes the following steps: arrange lithium ion battery 2 in specific frock earlier, make lithium ion battery 2 vertical place and first notes liquid hole 4 and second annotate liquid hole 5 and be located lithium ion battery 2's bottom and top respectively, open second valve 8 and evacuation unit 3, annotate liquid hole 5 through the second at battery top and carry out the evacuation, make the inside negative pressure that forms of lithium ion battery 2, open first valve 7 afterwards, electrolyte pours into lithium ion battery 2 inside smoothly through the first notes liquid hole 4 of battery bottom into, and soak to the pole piece along battery length direction, guarantee the infiltration effect. At the moment, vacuumizing and liquid injection are carried out synchronously, in the vacuumizing process, a small amount of electrolyte and redundant gas in the lithium ion battery 2 are collected into the buffer tank 9 from the second liquid injection hole 5 and the first vacuum tube 10 on the top of the battery, and the electrolyte can be recycled. After the liquid injection is finished, the first valve 7 is closed, and the vacuumizing unit 3 continues vacuumizing for 10-20s, so that redundant gas in the battery is completely pumped out, and the performance of the battery is ensured. Then, the first liquid injection hole 4 is closed, the second valve 8 is closed, the electrolyte in the buffer tank 9 is prevented from flowing back into the lithium ion battery 2, and finally the vacuumizing unit 3 is closed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a lithium ion battery priming device, its characterized in that includes electrolyte tank (1), lithium ion battery (2) and evacuation unit (3), lithium ion battery (2) the edge lithium ion battery (2) length direction's both ends are equipped with the apron respectively, both ends be equipped with first notes liquid hole (4) and second respectively and annotate liquid hole (5) on the apron, electrolyte tank (1) with first notes liquid hole (4) link to each other in order to lithium ion battery (2) inside injection electrolyte, evacuation unit (3) set up to be able to pass through second notes liquid hole (5) are right lithium ion battery (2) inside evacuation.
2. The lithium ion battery electrolyte injection device according to claim 1, wherein the lithium ion battery (2) is arranged to be vertically placed along the length direction of the lithium ion battery (2), so that the first electrolyte injection hole (4) and the second electrolyte injection hole (5) are respectively positioned at the bottom and the top of the lithium ion battery (2).
3. The lithium ion battery electrolyte injection device according to claim 1, wherein the electrolyte tank (1) is connected with the lithium ion battery (2) through a liquid inlet pipe (6), a first valve (7) is arranged on the liquid inlet pipe (6), the lithium ion battery (2) is connected with the vacuumizing unit (3) through a vacuum pipe, and a second valve (8) is arranged on the vacuum pipe.
4. The lithium ion battery electrolyte injection device according to claim 3, wherein a buffer tank (9) for collecting electrolyte is arranged between the electrolyte tank (1) and the vacuumizing unit (3).
5. The lithium ion battery electrolyte injection device according to claim 4, wherein the vacuum tube comprises a first vacuum tube (10) for connecting the lithium ion battery (2) and the buffer tank (9) and a second vacuum tube (11) for connecting the buffer tank (9) and the vacuum pumping unit (3).
6. The lithium ion battery electrolyte injection device according to any one of claims 1 to 5, wherein the electrolyte tank (1) comprises an upper cup body and a lower cup body, and the lower cup body is connected with the lithium ion battery (2).
7. The liquid injection method of the lithium ion battery is characterized by comprising the following specific steps: and injecting electrolyte into the lithium ion battery (2) along two ends of the lithium ion battery (2) in the length direction and vacuumizing the lithium ion battery (2) so that the electrolyte can infiltrate the pole piece in the lithium ion battery (2) along the length direction of the lithium ion battery (2).
8. The lithium ion battery electrolyte injection method according to claim 7, wherein the step of injecting the electrolyte is set to be started after the inside of the lithium ion battery (2) is vacuumized to form a negative pressure condition.
9. The lithium ion battery electrolyte injection method according to claim 7, characterized in that the lithium ion battery (2) is arranged to be vertically placed along the length direction of the lithium ion battery (2) so as to vacuumize from the top of the vertically placed lithium ion battery (2) and inject electrolyte from the bottom of the lithium ion battery (2).
10. The lithium ion battery electrolyte injection method according to any one of claims 7 to 9, further comprising: and after the liquid injection of the lithium ion battery (2) is finished, continuously vacuumizing the interior of the lithium ion battery (2) for 10-20 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010247143.8A CN112290169A (en) | 2020-03-31 | 2020-03-31 | Lithium ion battery liquid injection device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010247143.8A CN112290169A (en) | 2020-03-31 | 2020-03-31 | Lithium ion battery liquid injection device and method |
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| CN112290169A true CN112290169A (en) | 2021-01-29 |
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| CN202010247143.8A Pending CN112290169A (en) | 2020-03-31 | 2020-03-31 | Lithium ion battery liquid injection device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204233A (en) * | 2021-11-23 | 2022-03-18 | 天津力神电池股份有限公司 | Lithium ion battery liquid injection method adopting polygonal double-hole liquid injection mode |
| CN114552147A (en) * | 2022-03-21 | 2022-05-27 | 深圳市格林晟科技有限公司 | Internal circulation type battery liquid injection mechanism and liquid injection method thereof |
| CN115764200A (en) * | 2023-01-09 | 2023-03-07 | 中创新航科技股份有限公司 | Liquid injection method and liquid injection equipment |
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| CN201789002U (en) * | 2010-06-29 | 2011-04-06 | 上海比亚迪有限公司 | Lithium-ion secondary battery |
| CN102299272A (en) * | 2011-08-10 | 2011-12-28 | 中航锂电（洛阳）有限公司 | Battery and liquid injection method |
| CN106159188A (en) * | 2016-08-31 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | Through type liquid injection method and device for lithium ion battery |
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| WO2003077349A1 (en) * | 2002-03-08 | 2003-09-18 | Yongming Ju | An rechargeable lithium-ion power battery and manufacture method of the same |
| CN201789002U (en) * | 2010-06-29 | 2011-04-06 | 上海比亚迪有限公司 | Lithium-ion secondary battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114204233A (en) * | 2021-11-23 | 2022-03-18 | 天津力神电池股份有限公司 | Lithium ion battery liquid injection method adopting polygonal double-hole liquid injection mode |
| CN114552147A (en) * | 2022-03-21 | 2022-05-27 | 深圳市格林晟科技有限公司 | Internal circulation type battery liquid injection mechanism and liquid injection method thereof |
| CN115764200A (en) * | 2023-01-09 | 2023-03-07 | 中创新航科技股份有限公司 | Liquid injection method and liquid injection equipment |
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Application publication date: 20210129 |