CN113804363A - Lithium ion battery leak detection device - Google Patents

Lithium ion battery leak detection device Download PDF

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Publication number
CN113804363A
CN113804363A CN202111200821.6A CN202111200821A CN113804363A CN 113804363 A CN113804363 A CN 113804363A CN 202111200821 A CN202111200821 A CN 202111200821A CN 113804363 A CN113804363 A CN 113804363A
Authority
CN
China
Prior art keywords
lithium ion
ion battery
detection
acid gas
detection device
Prior art date
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.)
Pending
Application number
CN202111200821.6A
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Chinese (zh)
Inventor
罗灿
杨学文
石振
伍德伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Xingxuneng New Energy Technology Co Ltd
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Hunan Xingxuneng New Energy Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Xingxuneng New Energy Technology Co Ltd filed Critical Hunan Xingxuneng New Energy Technology Co Ltd
Priority to CN202111200821.6A priority Critical patent/CN113804363A/en
Publication of CN113804363A publication Critical patent/CN113804363A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material

Abstract

The invention provides a lithium ion battery leak detection device which comprises a rotary placing frame, an acid gas supply mechanism and an acid detection mechanism, wherein the rotary placing frame is movably placed in a vacuum box body, the acid gas supply mechanism is communicated with the vacuum box body, a placing table for placing a lithium ion battery is arranged on the rotary placing frame, the acid detection mechanism is arranged at one end of the placing table and is in contact with the end part of the lithium ion battery when the acid detection mechanism is in a detection state; when the acidity detection mechanism is in a non-detection state, the acidity detection mechanism is not in contact with the end part of the lithium ion battery; the acidity detection mechanism and the vacuum box body are not used simultaneously. The invention can ensure that the detection rate of the lithium ion battery with the leak hole is higher.

Description

Lithium ion battery leak detection device
Technical Field
The invention relates to the technical field of lithium ion battery manufacturing, in particular to a lithium ion battery leak hole detection device.
Background
The lithium ion battery generally comprises an electric core, a shell and a cover plate, wherein the electric core is arranged in the shell, then the cover plate and the shell are packaged by laser welding, a welding seam can be formed between the cover plate and the shell in the laser welding process, and the phenomenon of leakage holes at the welding seam is easily caused due to the influence of the defects, operation defects, cover plate impurities, aluminum shell impurities and the like of the welding technology. And the leak hole is difficult to effectively screen through manual work or inspection instrument in the production manufacturing process because the aperture is less, if the equipment is gone into the car after, has the risk of leaking electrolyte, can't guarantee lithium ion battery's safety in utilization. The existing lithium ion battery leakage detection device generally leads to a battery, a welding seam is positioned at the bottom layer, then test paper is placed below a cover plate, whether leakage occurs or not is judged by observing whether color reaction occurs on the test paper, the method can not completely detect the lithium ion battery with the leakage hole, the leakage phenomenon does not occur in hundreds of percent because the position and the shape of the leakage hole determine that the inverted lithium ion battery also does not necessarily occur, and the electrolyte in the lithium ion battery is generally packaged in an aluminum-plastic film, and the electrolyte can only leak under the condition that the packaging of the aluminum-plastic film is not tight, so the electrolyte is not easy to leak, only the risk of leakage exists in the use process of the lithium ion battery, and then the risk of electrolyte leakage can also be caused by the existence of the leakage hole. Therefore, the prior art cannot completely detect the lithium ion battery with the leak.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a lithium ion battery leak detection device which can ensure that the detection rate of a lithium ion battery with a leak is higher.
The technical scheme of the invention is as follows: a lithium ion battery leak hole detection device comprises a rotary placing frame, an acid gas supply mechanism and an acid detection mechanism, wherein the rotary placing frame is movably placed in a vacuum box body, the acid gas supply mechanism is communicated with the vacuum box body, a placing table for placing a lithium ion battery is arranged on the rotary placing frame, the acid detection mechanism is arranged at one end of the placing table and is in contact with the end part of the lithium ion battery when the acid detection mechanism is in a detection state; when the acidity detection mechanism is in a non-detection state, the acidity detection mechanism is not in contact with the end part of the lithium ion battery; the acidity detection mechanism and the vacuum box body are not used simultaneously.
The further technical scheme of the invention is as follows: the rotary placing frame comprises a frame body, a rotary disk and a motor for controlling the rotary disk to rotate, wherein the rotary disk is arranged at the upper end of the frame body, a plurality of placing platforms distributed in a ring shape are arranged on the rotary disk, each placing platform is matched with an acid detection mechanism for use, a groove or a hole for placing a lithium ion battery is formed in each placing platform, and the acid detection mechanism is arranged at one end, far away from a rotating shaft, of each groove or hole.
Furthermore, a plurality of detachable blocking belts are arranged on the outer sides of the grooves or the holes.
Furthermore, an elastic mechanism for fixing the end part of the lithium ion battery is arranged in the groove or the hole, the elastic mechanism comprises a spring and a clamping sleeve arranged at the end part of the spring, and the elastic mechanism and the acidity detection mechanism are respectively arranged at two ends of the groove or the hole.
Further, the number of the rotating disks is two, and the two rotating disks are symmetrically arranged.
Further, the acidity detection mechanism comprises detection test paper and a movable frame for fixing the detection test paper, and the movable frame is detachably mounted at one end of the placing table.
Further, the detection test paper comprises PH test paper or purple litmus test paper, and when the detection test paper is used, water is firstly sprayed to keep a wet state.
Further, acid gas air feed mechanism includes acid gas generating unit and gas drying unit, and acid gas warp gas drying unit enters into the vacuum box after dry, be equipped with the check valve between gas drying unit and the vacuum box.
Further, the vacuum box body is connected with a vacuum pump.
Further, the acid gas in the acid gas supply mechanism is SO2Hydrogen halide, NO2、SO3、CO2、H2And one or a combination of more of S.
The invention has the beneficial effects that:
(1) the invention puts the lithium ion battery on the rotary placing frame, then puts the rotary placing frame in the vacuum box, injects the acid gas into the vacuum box through the acid gas supply mechanism, the acid gas is dispersed in the vacuum box, if the leakage hole phenomenon exists on the welding seam of the lithium ion battery, the acid gas can enter the lithium ion battery through the leakage hole, when the lithium ion battery is exposed in the acid gas for a period of time, the rotary placing frame is moved out of the vacuum box, is statically exposed in the dry air for a period of time, then the end part of the lithium ion battery is contacted with the acid detection mechanism, the acid gas in the lithium ion battery can be released through the rotation of the rotary placing frame, and then the acid detection mechanism judges whether the acid gas is released, so as to judge whether the leakage hole exists on the lithium ion battery, the detection device of the invention can ensure that the lithium ion battery with the leakage hole is detected in percentage, the detection rate is high;
(2) according to the invention, the acidic gas firstly enters the leak hole of the lithium ion battery and then is released, and the acidic gas does not have any corrosion action in a vacuum and dry environment, is not easy to chemically react with devices inside the lithium ion battery, and has high safety;
(3) the invention has simple structure, convenient operation and lower detection cost, and is suitable for application and popularization.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a rotary rack in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a rotary disk in the rotary rack according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a part of a unit of a turntable in a rotary rack in embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 3 of the present invention. Illustration of the drawings:
1. rotating the placing rack; 11. a placing table; 111. a recess or hole; 12. a frame body; 13. rotating the disc; 14. a motor; 15. blocking a belt; 16. an elastic mechanism; 161. a spring; 162. a card sleeve; 2. an acid gas supply mechanism; 21. an acid gas generation unit; 22. a gas drying unit; 23. a one-way valve; 3. an acidity detection mechanism; 31. detecting test paper; 32. a movable frame; 4. a vacuum box body; 5. a vacuum pump; 6. an acid gas collection mechanism; 7. a circulation pipe; 8. and a circulating pump.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Example 1:
as shown in fig. 1, 3 and 4, the lithium ion battery leak detection device comprises a rotary rack 1, an acid gas supply mechanism 2 and an acid detection mechanism 3, wherein the rotary rack 1 is movably placed in a vacuum box body 4, the acid gas supply mechanism 2 is communicated with the vacuum box body 4, a placing table 11 for placing a lithium ion battery is arranged on the rotary rack 1, and the acid detection mechanism 3 is arranged at one end of the placing table 11 and is in contact with the end part of the lithium ion battery when the acid detection mechanism 3 is in a detection state; when the acidity detection mechanism 3 is in a non-detection state, the acidity detection mechanism is not in contact with the end part of the lithium ion battery; the acidity detecting mechanism 2 is not used simultaneously with the vacuum chamber 4 (when the acidity detecting mechanism 3 is used, the rotary rack 1 is not in the vacuum chamber 4, or although the rotary rack 1 is in the vacuum chamber 4, the vacuum chamber 4 is not in a vacuum state but in a normal air state; when the vacuum chamber 4 is used, the acidity detecting mechanism 3 is in a non-use state or a closed state).
In the embodiment, a lithium ion battery is placed on a rotary placing rack 1, then the rotary placing rack 1 is placed in a vacuum box 4, acid gas is injected into the vacuum box 4 through an acid gas supply mechanism 2, the acid gas is dispersed in the vacuum box 4, if a leak hole phenomenon exists in a welding seam of the lithium ion battery, the acid gas can enter the lithium ion battery through the leak hole, after the lithium ion battery is exposed in the acid gas for a period of time, the rotary placing rack 1 is placed out of the vacuum box 4, the lithium ion battery is statically exposed in dry air for a period of time, then the end part of the lithium ion battery is contacted with an acid detection mechanism 3, the acid gas in the lithium ion battery can be released through the rotation of the rotary placing rack 1, and then whether the acid gas is released is judged through the acid detection mechanism 3 to judge whether the leak hole exists in the lithium ion battery, the detection device can ensure that the percentage of the lithium ion batteries with the leakage holes is detected, and the detection rate is higher.
In this embodiment, rotatory rack 1 includes support body 12, rotary disk 13 and control rotary disk 13 pivoted motor 14, and rotary disk 13 sets up in the upper end of support body 12, is equipped with a plurality of annular distribution on the rotary disk 13 and places platform 11, and every acid detection mechanism 3 that supports of placing platform 11 uses, places and is equipped with the recess 111 that is used for placing lithium ion battery on the platform 11, and acid detection mechanism 3 sets up the one end of keeping away from the rotation axis at recess 111. The detachable blocking belt 15 is arranged on the outer side of the groove 111, the lithium ion battery can be stably placed in the groove 111 through the blocking belt 15, a bayonet structure capable of clamping the lithium ion battery and limiting the movement of the lithium ion battery can be arranged on the inner side of the blocking belt 15, and a thread gluing structure capable of limiting the movement of the lithium ion battery can also be arranged. The elastic mechanism 16 for fixing the end part of the lithium ion battery is arranged in the groove 111, the elastic mechanism 16 comprises a spring 161 and a clamping sleeve 162 arranged at the end part of the spring 161, the clamping sleeve 162 can be used for fixing the end part of the lithium ion battery, the elastic mechanism 16 and the acidity detection mechanism 3 are respectively arranged at two ends of the groove 111, and the elastic mechanism 16 can be used for facilitating storage of the lithium ion battery and controlling the distance (whether the two contact) between the lithium ion battery and the acidity detection mechanism 3. The number of the rotary disks 13 is two, the two rotary disks 13 are symmetrically arranged, and the leakage hole condition of a plurality of lithium ion batteries can be detected at one time.
In this embodiment, the acidity detection mechanism 3 includes the test paper 31 and is used for the adjustable shelf 32 of fixed test paper 31, and the one end at the platform is placed in adjustable shelf 32 detachable installation, when not using the acidity detection mechanism 3, can dismantle adjustable shelf 32, installs adjustable shelf 32 again when using the acidity detection mechanism 3, and the adjustable shelf can be installed through the form of bayonet socket. The detection test paper 31 is purple litmus test paper, and the detection test paper 31 sprays water when using earlier and keeps the moist state, and when lithium ion battery exists the leak, the acid gas that volatilizees from the leak meets water and first forms acid, and then acid makes purple litmus test paper turn red, whether through observing corresponding purple litmus test paper discolours, judges whether lithium ion battery exists the leak.
In this embodiment, the acid gas supply mechanism 2 includes an acid gas generating unit 21 and a gas drying unit 22, the acid gas is dried by the gas drying unit 22 and then enters the vacuum box 4, and a check valve 23 is disposed between the gas drying unit 22 and the vacuum box 4. Vacuum box 4 is connected with vacuum pump 5, detects earlier stage and makes and be in vacuum state in the vacuum box 4 through vacuum pump 5, detects later stage accessible vacuum pump 5 and takes out and collect acid gas. The acid gas in the acid gas supply mechanism 2 is NO2
Example 2:
as shown in fig. 1, 3 and 5, the present application is different from the embodiments in that: place and be equipped with the hole 111 that is used for placing lithium ion battery on the platform 11, the hole 111 outside is equipped with four detachable and keeps off and takes 15, and test paper 31 includes the PH test paper, and when lithium ion battery had the small opening, the acid gas that volatilizees from the small opening met water and at first formed acid, and then acid makes the PH test paper, through observing corresponding discolour, judges whether lithium ion battery had the small opening, and the acid gas in the acid gas air feed mechanism 2 is SO2The rest of the structure is the same as the embodiment.
Example 3:
as shown in fig. 2, 3 and 4, the present application is different from the embodiments in that: vacuum pump 5 still is connected with acid gas and collects mechanism 6, and acid gas collects mechanism 6 and is connected with vacuum box 4 through circulating line 7, is convenient for carry out cyclic utilization with the acid gas who collects, both does benefit to and saves the cost, does benefit to the environmental protection again, is equipped with circulating pump 8 on circulating line 7, all is equipped with the valve on the pipeline between vacuum pump 5 and the acid gas collection mechanism 6 and on the circulating line, controls acid gas's flow through controlling each valve. The rest of the structure is the same as the embodiment.

Claims (10)

1. The device for detecting the leak of the lithium ion battery is characterized by comprising a rotary placing frame, an acid gas supply mechanism and an acid detection mechanism, wherein the rotary placing frame is movably placed in a vacuum box body, the acid gas supply mechanism is communicated with the vacuum box body, a placing table for placing the lithium ion battery is arranged on the rotary placing frame, the acid detection mechanism is arranged at one end of the placing table and is in contact with the end part of the lithium ion battery when the acid detection mechanism is in a detection state; when the acidity detection mechanism is in a non-detection state, the acidity detection mechanism is not in contact with the end part of the lithium ion battery; the acidity detection mechanism and the vacuum box body are not used simultaneously.
2. The lithium ion battery leak detection device according to claim 1, wherein the rotary placement frame comprises a frame body, a rotary disk and a motor for controlling the rotary disk to rotate, the rotary disk is arranged at the upper end of the frame body, a plurality of placement tables distributed in an annular manner are arranged on the rotary disk, each placement table is matched with one acidity detection mechanism for use, a groove or a hole for placing the lithium ion battery is formed in each placement table, and the acidity detection mechanism is arranged at one end, away from the rotary shaft, of each groove or hole.
3. The lithium ion battery leak detection device of claim 2, wherein a plurality of removable retaining strips are provided outside the recess or hole.
4. The lithium ion battery leak detection device according to claim 2, wherein the groove or the hole is internally provided with an elastic mechanism for fixing the end of the lithium ion battery, the elastic mechanism comprises a spring and a clamping sleeve arranged at the end of the spring, and the elastic mechanism and the acidity detection mechanism are respectively arranged at two ends of the groove or the hole.
5. The lithium ion battery leak detection device according to claim 2, wherein the number of the rotating disks is two, and the two rotating disks are symmetrically arranged.
6. The lithium ion battery leak detection device according to any one of claims 1 to 5, wherein the acidity detection mechanism comprises a detection test paper and a movable frame for fixing the detection test paper, and the movable frame is detachably mounted at one end of the placing table.
7. The lithium ion battery leak detection device of claim 6, wherein the detection test paper comprises a PH test paper or a purple litmus test paper, and the detection test paper is first sprayed with water to maintain a wet state when in use.
8. The lithium ion battery leak detection device according to any one of claims 1 to 5, wherein the acid gas supply mechanism comprises an acid gas generation unit and a gas drying unit, the acid gas is dried by the gas drying unit and then enters the vacuum box, and a check valve is arranged between the gas drying unit and the vacuum box.
9. The lithium ion battery leak detection device according to any one of claims 1 to 5, wherein the vacuum box is connected with a vacuum pump.
10. The lithium ion battery leak detection device according to any one of claims 1 to 5, wherein the acid gas in the acid gas supply mechanism is SO2Hydrogen halide, NO2、SO3、CO2、H2And one or a combination of more of S.
CN202111200821.6A 2021-10-14 2021-10-14 Lithium ion battery leak detection device Pending CN113804363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111200821.6A CN113804363A (en) 2021-10-14 2021-10-14 Lithium ion battery leak detection device

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Application Number Priority Date Filing Date Title
CN202111200821.6A CN113804363A (en) 2021-10-14 2021-10-14 Lithium ion battery leak detection device

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Publication Number Publication Date
CN113804363A true CN113804363A (en) 2021-12-17

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002100388A4 (en) * 2001-05-24 2003-06-05 Air Automotive Pty Limited Smoke generating device
CN102426082A (en) * 2011-11-14 2012-04-25 中国电子科技集团公司第十八研究所 Method for detecting leak of lithium ion storage battery before liquid injection and sealing
CN202444024U (en) * 2011-11-24 2012-09-19 哈尔滨商业大学 Glove box for lithium ion battery
CN105953985A (en) * 2016-06-16 2016-09-21 安徽皖仪科技股份有限公司 Lithium battery electrode cover plate helium mass spectrum leak detection method
CN211452749U (en) * 2019-11-08 2020-09-08 广州新龙浩工业设备有限公司 Lithium battery sealing cover sealing performance detection device
CN112186280A (en) * 2020-10-12 2021-01-05 捷威动力工业江苏有限公司 Method for detecting leakage of lithium ion battery module
CN112665794A (en) * 2020-12-21 2021-04-16 江苏万锂达智能科技有限公司 Lithium ion battery leakage detection method
CN113218589A (en) * 2021-04-02 2021-08-06 苏州领湃新能源科技有限公司 Leakage testing device and method for lithium ion battery

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002100388A4 (en) * 2001-05-24 2003-06-05 Air Automotive Pty Limited Smoke generating device
CN102426082A (en) * 2011-11-14 2012-04-25 中国电子科技集团公司第十八研究所 Method for detecting leak of lithium ion storage battery before liquid injection and sealing
CN202444024U (en) * 2011-11-24 2012-09-19 哈尔滨商业大学 Glove box for lithium ion battery
CN105953985A (en) * 2016-06-16 2016-09-21 安徽皖仪科技股份有限公司 Lithium battery electrode cover plate helium mass spectrum leak detection method
CN211452749U (en) * 2019-11-08 2020-09-08 广州新龙浩工业设备有限公司 Lithium battery sealing cover sealing performance detection device
CN112186280A (en) * 2020-10-12 2021-01-05 捷威动力工业江苏有限公司 Method for detecting leakage of lithium ion battery module
CN112665794A (en) * 2020-12-21 2021-04-16 江苏万锂达智能科技有限公司 Lithium ion battery leakage detection method
CN113218589A (en) * 2021-04-02 2021-08-06 苏州领湃新能源科技有限公司 Leakage testing device and method for lithium ion battery

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Application publication date: 20211217

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