CN202905904U - Buffer cup for formation of lithium iron phosphate battery - Google Patents

Buffer cup for formation of lithium iron phosphate battery Download PDF

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Publication number
CN202905904U
CN202905904U CN2012206127695U CN201220612769U CN202905904U CN 202905904 U CN202905904 U CN 202905904U CN 2012206127695 U CN2012206127695 U CN 2012206127695U CN 201220612769 U CN201220612769 U CN 201220612769U CN 202905904 U CN202905904 U CN 202905904U
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CN
China
Prior art keywords
cup
buffer
gas outlet
air inlet
buffer cup
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Active
Application number
CN2012206127695U
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Chinese (zh)
Inventor
蒋连喜
盛勇
皮利勇
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Guangdong Zhicheng Champion Group Co Ltd
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Guangdong Zhicheng Champion Group Co Ltd
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Priority to CN2012206127695U priority Critical patent/CN202905904U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The utility model discloses a buffer cup for formation of a lithium iron phosphate battery. The buffer cup comprises a cup body as well as a gas inlet and a gas outlet arranged at the two ends of the cup body, wherein a cavity communicated with the gas inlet and the gas outlet are arranged in the cup body; a filter net used for blocking a buffer solution is arranged in the cavity of the buffer cup; the gas inlet and the gas outlet are symmetrical; and the filter net is positioned at one end close to the gas outlet. When a storage battery is subjected to gas suction treatment, the buffer cup provided with the cavity used for receiving an electrolyte solution and the filter net arranged in the cavity is arranged between a liquid filling hole and a vacuum tube of the storage battery, so that the electrolyte solution can be effectively prevented from entering into a vacuum pump and the leaked electrolyte solution in the gas suction process can be also recovered at the same time.

Description

A kind of ferric phosphate lithium cell changes into uses buffer cup
Technical field
The utility model relates to storage battery forming technology field, relates in particular to a kind of ferric phosphate lithium cell and changes into and use buffer cup.
Background technology
Along with the development of ev industry, the user is to the flying power of electric automobile and propose higher requirement useful life, and then capacity and the cycle life of the employed lithium iron phosphate dynamic battery of electric automobile is proposed requirements at the higher level; Ferric phosphate lithium cell forms fine and close SEI film in the stage of changing into, and for existing large-capacity lithium iron phosphate battery, the SEI film of formation is fine and close and complete not, and then may affect charge-discharge performance and the cycle performance of battery.
For the large-capacity lithium iron phosphate electrokinetic cell, the gas that forms the generation of SEI film in formation process is more, if the gas that produces can't in time be discharged battery, can between the both positive and negative polarity of inside battery, form gas-liquid interface, affect the free shuttling of lithium ion, and then may form " Li dendrite ", and can't form complete stable SEI film, charge-discharge performance and the cycle life of battery there is considerable influence.
For the problems referred to above, in the battery formation process, need to extract out the gas that the stage that changes into produces, if directly adopt vacuum machine that the gas that produces in the storage battery is extracted, the interior excessive electrolyte of battery may occur enter vacuum machine, also may cause damage to vacuum machine when causing the electrolyte waste.
Summary of the invention
The purpose of this utility model is to propose a kind of ferric phosphate lithium cell and changes into and use buffer cup, and effectively resistance electrolyte enters vacuum machine, can excessive electrolyte be reclaimed simultaneously.
For reaching this purpose, the utility model by the following technical solutions:
A kind of ferric phosphate lithium cell changes into uses buffer cup, comprises cup, is arranged on air inlet and the gas outlet at described cup two ends, wherein, has the cavity that is communicated with described air inlet and gas outlet in the described cup;
Be provided with in the cavity of described buffer cup for the filter screen that stops buffer solution to pass through;
Described air inlet and gas outlet are for being symmetrical arranged, and described filter screen is positioned at the end near the gas outlet.
As a kind of preferred version of above-mentioned buffer cup, described air inlet is connected with the liquid injection hole of lithium iron battery.
As a kind of preferred version of above-mentioned buffer cup, described gas outlet is communicated with vacuum tube.
As a kind of preferred version of above-mentioned buffer cup, described cup is made by the material of electrolyte resistance corrosion.
As a kind of preferred version of above-mentioned buffer cup, described cup is the column structure with inner chamber.
As a kind of preferred version of above-mentioned buffer cup, be positioned at the cup two ends and be provided with the link that is connected for battery liquid-filling hole or vacuum tube.
As a kind of preferred version of above-mentioned buffer cup, described link is arranged on the axis direction of described cup.
As a kind of preferred version of above-mentioned buffer cup, described air inlet and gas outlet are opened in respectively on the link that is positioned at described cup two ends.
As a kind of preferred version of above-mentioned buffer cup, described cup is taper near the inwall of air inlet one end.
As a kind of preferred version of above-mentioned buffer cup, described resistant material is polyethylene.
The beneficial effects of the utility model are: the utility model is used buffer cup by providing a kind of ferric phosphate lithium cell to change into, when storage battery is bled, between battery filling-hole and vacuum tube, be provided with buffer cup, have in this buffer cup be used to the cavity that holds electrolyte, and be provided with filter screen at cavity inside, can prevent effectively that electrolyte from entering vacuum pump, also can the electrolyte that leak in the pumping process be reclaimed simultaneously.
Description of drawings
Fig. 1 is the structural representation of the buffer cup that provides of the utility model embodiment one;
Fig. 2 is the structural representation of the buffer cup that provides of the utility model embodiment two;
Fig. 3 is the structural representation of the buffer cup that provides of the utility model embodiment three.
Wherein:
1: cup; 2: air inlet; 3: the gas outlet; 4: filter screen; 5: link.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Execution mode one
As shown in Figure 1, the utility model provides a kind of ferric phosphate lithium cell to change into and has used buffer cup, and this buffer cup be used for to connect the vacuum tube of storage battery and vacuum machine, is used for simultaneously being contained in extracting storage battery and changing into stage excessive electrolyte when producing gas; It comprises cup 1, be arranged on air inlet 2 and the gas outlet 3 at cup 1 two ends, has the cavity that is communicated with air inlet 2 and gas outlet 3 in the cup 1, also be provided with in the cavity in this buffer cup for the filter screen 4 that stops buffer solution to pass through, air inlet 2 and gas outlet 3 are for being symmetrical arranged, in the buffer cup use procedure, air inlet 2 is connected with the liquid injection hole of lithium iron battery, gas outlet 3 is communicated with vacuum tube, and filter screen 4 is arranged on the end near gas outlet 3, the gas that filter screen 4 can make battery change into the stage generation passes through, but stops passing through of electrolyte.
Cup 1 adopts the material of electrolyte resistance corrosion to make, such as polyethylene; Cup 1 is for having the column structure of inner chamber, in this execution mode, cavity in the cup 1 is cylindrical cavity, and air inlet 2 and gas outlet 3 all are communicated with this inner chamber, space between air inlet 2 and the filter screen 4 is greater than the space between gas outlet 3 and the filter screen 4 simultaneously, and this kind structure is provided with and is beneficial to electrolyte depositing in buffer cup.
For convenient buffering is connected for being connected with vacuum pump with storage battery, the two ends that are positioned at cup 1 are provided with the link 5 that is connected for battery liquid-filling hole or vacuum tube, and two links all are arranged on the axis direction of cup 1, and air inlet 2 and gas outlet 3 are opened in respectively on the link 5 that is positioned at cup 1 two ends simultaneously.
The buffer cup that present embodiment is mentioned, using with in the process, its air inlet 2 is communicated with the battery liquid-filling hole, and gas outlet 3 is communicated with vacuum tube, in pumping process, excessive electrolyte, under the barrier effect of filter screen 4, can not enter vacuum pump, electrolyte can be stored in the cavity of cup 1 simultaneously, can be back in the battery after finishing when bleeding, can not cause the waste of electrolyte and vacuum pump is caused damage.
Execution mode two:
As shown in Figure 2, in this execution mode, the end that cup 1 is provided with air inlet is pyramidal structure, the cavity of cup 1 inside also is pyramidal structure near an end inwall of air inlet 2 simultaneously, this kind setting can make things convenient for the backflow of electrolyte, in this execution mode, except this structure and execution mode one were different, other structure was all identical with execution mode one.
Execution mode three:
As shown in Figure 3, in this execution mode, cup 1 integral body is pyramidal structure, the cavity inner wall integral body of cup 1 also is pyramidal structure simultaneously, this kind setting is conducive to the backflow of electrolyte more, in this execution mode, except this structure and execution mode one were different, other structure was all identical with execution mode one.
Know-why of the present utility model has below been described in conjunction with specific embodiments.These are described just in order to explain principle of the present utility model, and can not be interpreted as by any way the restriction to the utility model protection range.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, and these modes all will fall within the protection range of the present utility model.

Claims (10)

1. a ferric phosphate lithium cell changes into and uses buffer cup, comprises cup, is arranged on air inlet and the gas outlet at described cup two ends, it is characterized in that, has the cavity that is communicated with described air inlet and gas outlet in the described cup;
Be provided with in the cavity of described buffer cup for the filter screen that stops buffer solution to pass through;
Described air inlet and gas outlet are for being symmetrical arranged, and described filter screen is positioned at the end near the gas outlet.
2. buffer cup according to claim 1 is characterized in that, described air inlet is connected with the liquid injection hole of lithium iron battery.
3. buffer cup according to claim 1 is characterized in that, described gas outlet is communicated with vacuum tube.
4. buffer cup according to claim 1 is characterized in that, described cup is made by the material of electrolyte resistance corrosion.
5. buffer cup according to claim 1 is characterized in that, described cup is the column structure with inner chamber.
6. buffer cup according to claim 5 is characterized in that, is positioned at the cup two ends and is provided with the link that is connected for battery liquid-filling hole or vacuum tube.
7. buffer cup according to claim 6 is characterized in that, described link is arranged on the axis direction of described cup.
8. according to claim 6 or 7 described buffer cups, it is characterized in that described air inlet and gas outlet are opened in respectively on the link that is positioned at described cup two ends.
9. buffer cup according to claim 8 is characterized in that, described cup is taper near the inwall of air inlet one end.
10. buffer cup according to claim 4 is characterized in that, described resistant material is polyethylene.
CN2012206127695U 2012-11-19 2012-11-19 Buffer cup for formation of lithium iron phosphate battery Active CN202905904U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012206127695U CN202905904U (en) 2012-11-19 2012-11-19 Buffer cup for formation of lithium iron phosphate battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012206127695U CN202905904U (en) 2012-11-19 2012-11-19 Buffer cup for formation of lithium iron phosphate battery

Publications (1)

Publication Number Publication Date
CN202905904U true CN202905904U (en) 2013-04-24

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CN2012206127695U Active CN202905904U (en) 2012-11-19 2012-11-19 Buffer cup for formation of lithium iron phosphate battery

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105449152A (en) * 2015-02-16 2016-03-30 万向A一二三系统有限公司 Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device
CN112713367A (en) * 2021-01-11 2021-04-27 湖北亿纬动力有限公司 Device for improving liquid loss of battery and formation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105449152A (en) * 2015-02-16 2016-03-30 万向A一二三系统有限公司 Lithium-ion battery with pneumatic anti-gas-expansion automatic liquid replenishing device
CN105449152B (en) * 2015-02-16 2017-09-12 万向一二三股份公司 A kind of lithium ion battery provided with the anti-flatulence automatic liquid supply device of pneumatic type
CN112713367A (en) * 2021-01-11 2021-04-27 湖北亿纬动力有限公司 Device for improving liquid loss of battery and formation method

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