CN108645698A - A kind of lithium battery free state sealing welding line pressure resistant testing device - Google Patents
A kind of lithium battery free state sealing welding line pressure resistant testing device Download PDFInfo
- Publication number
- CN108645698A CN108645698A CN201810463516.8A CN201810463516A CN108645698A CN 108645698 A CN108645698 A CN 108645698A CN 201810463516 A CN201810463516 A CN 201810463516A CN 108645698 A CN108645698 A CN 108645698A
- Authority
- CN
- China
- Prior art keywords
- free state
- lithium battery
- welding line
- testing device
- line pressure
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Abstract
The present invention relates to cover plate of power batteries and battery case welding technology field, especially a kind of lithium battery free state seals welding line pressure resistant testing device, including unidirectional air pump, the unidirectional air pump is connected by check valve with pneumatic triple piece, the pneumatic triple piece is connected with stable-pressure device, the stable-pressure device is connected with tracheae, and the tracheae is connected by connection structure with the liquid injection hole of test battery.With the above structure, this test device prevented to be glued well it is not applicable caused by various adverse effects, and due to the sealing means using squash type in entire test process, the gas leakage phenomenon in test process is obviously improved.Therefore entire test process can be stablized and be quickly finished to this test device.
Description
Technical field
The present invention relates to cover plate of power battery and battery case welding technology field, especially a kind of lithium battery free state
Seal welding line pressure resistant testing device.
Background technology
Laser welding has been more and more widely used in current manufacturing industry production process.Especially in precision manufactureing, boat
The industries such as empty space flight, automation control, auto industry and shipbuilding are largely used and our company is in professional production power electric
Important production technology in pond.During laser welding, the demand that intake heat can be preferably minimized, heat affected area
Metallographic variation range is small, is one of the welding form that welding section deformation is minimum caused by heat transfer.Common rectangular power electric
In the production technology of pond：Battery core enters Seal welding in shell to aluminum alloy casing, single battery liquid injection port sealing nail welding, module and matches
Group laser welding, the applications such as pole busbar welding are very common.After battery core enters shell, battery cover board assembly and shell complete envelope
After mouth welding, testing staff needs to carry out sampling observation test to weld seam pressure-bearing, complete in laser welding to verify aluminum alloy materials
There are the weld defects such as rosin joint, hole and solder skip at whether weld seam later is internal.The generation of these defects can cause later stage battery to exist
The possibility for causing leakage accident and security performance reduction of fluid injection or formation process.Therefore laser welding process is in processing procedure mistake
Journey and detection controlling unit are most important.
Invention content
The technical problem to be solved in the invention is to provide one kind being capable of steady testing battery cover board assembly and battery case
Seal the weld seam pressure resistant testing device of situation.
In order to solve the above technical problems, a kind of lithium battery free state of the present invention seals welding line pressure resistant testing device,
Including unidirectional air pump, the unidirectional air pump is connected by check valve with pneumatic triple piece, and the pneumatic triple piece is filled with voltage stabilizing
It sets and is connected, the stable-pressure device is connected with tracheae, and the tracheae is connected by connection structure with the liquid injection hole of test battery
It connects.
Further, the pneumatic triple piece includes sequentially connected air filter, pressure reducing valve and oil sprayer, the sky
Air filter is connected with check valve, and the oil sprayer is connected with stable-pressure device.
Further, it is provided with pressure gauge on the pipeline between the pressure reducing valve and oil sprayer.
Further, the connection structure includes transition connector, and the transition connector passes through with rotation hand wheel upper end
Threaded engagement seals, and the handwheel lower end that screws is welded and fixed with drive screw upper end；The drive screw lower end and lower lock block
It is welded and fixed.
Further, further include O-ring seal, the O-ring seal upper surface is bonded by double faced adhesive tape and lower lock block,
Gap between the O-ring seal sealing lower lock block and the liquid injection hole for testing battery.
Further, further include chuck body, the chuck body bottom is provided with the card slot for placing test battery.
Further, the chuck body upper end is fixed with holder by hexagon socket head cap screw.
With the above structure, the present invention utilizes this rational structure, can complete entire lithium battery free state well
Seal welding line voltage-withstand test process.We have selected stable state pneumatic circuit control mode in test process, in the process of test
In increase stable-pressure device, make entire test process more have stability.Using the tracheae sheared in original test process
It is glued to above the liquid injection hole of single battery, this connection type does not simply fail to ensure that the tracheae of shearing concordantly can fit to electricity
The liquid injection hole upper surface in pond, and the setting time that the AB glue used during being glued needs 20-30 minutes, largely add
The period of test is grown.And since fluid injection bore dia is smaller during splicing, the glue that bonding occurred overflows into
In liquid injection hole, the phenomenon that causing to block during inflating pressure, the interruption of test is caused.This test device prevents well
Be glued it is not applicable caused by various adverse effects, and due to the sealing means using squash type in entire test process,
Gas leakage phenomenon in test process is obviously improved.Therefore this test device, which can be stablized and quickly finish, entirely tested
Journey.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that a kind of lithium battery free state of the present invention seals welding line pressure resistant testing device clamp body structure chart；
Fig. 2 is that a kind of lithium battery free state of the present invention seals welding line pressure resistant testing device coupling part schematic diagram；
Fig. 3 is that a kind of lithium battery free state of the present invention seals L135 type battery schematic diagrames in welding line pressure resistant testing device；
Fig. 4 a are that a kind of lithium battery free state of the present invention seals welding line pressure resistant testing device general assembly structure chart；
Fig. 4 b are the side view of Fig. 4 a of the present invention.
In figure：1 is unidirectional air pump, and 2 be check valve, and 3 be air filter, and 4 be pressure reducing valve, and 5 be pressure gauge, and 6 be mist of oil
Device, 7 be stable-pressure device, and 8 be transition connector, and 9 be rotation hand wheel, and 10 be drive screw, and 11 be hex nut, and 12 be pushing
Block, 13 be O-ring seal, and 14 be hexagon socket head cap screw, and 15 be L135 type batteries, and 16 be chuck body, and 17 be holder, and 18 be fluid injection
Hole.
Specific implementation mode
As shown in figures 4 a and 4b, a kind of lithium battery free state of the invention seals welding line pressure resistant testing device, packet
Unidirectional air pump 1 is included, the unidirectional air pump 1 is connected by check valve 2 with pneumatic triple piece, and the pneumatic triple piece is filled with voltage stabilizing
It sets 7 to be connected, the stable-pressure device 7 is connected with tracheae, and the tracheae passes through connection structure and test battery as shown in Figure 3
Liquid injection hole 18 is connected.
As shown in fig. 4 a, the pneumatic triple piece includes sequentially connected air filter 3, pressure reducing valve 4 and oil sprayer 6,
The air filter 3 is connected with check valve 2, and the oil sprayer 6 is connected with stable-pressure device 7；The pressure reducing valve 4 and mist of oil
Pressure gauge 5 is provided on pipeline between device 6.The main purpose that pneumatic triple piece is arranged was carried out to the impurity in air
Filter, and the moisture in air is removed, lubricating oil is added, ensures the smoothness of gas return path.And add pressure gauge
5, the pressure in circuit is visually monitored.It is to the air pressure in circuit in fact when gas passes through stable-pressure device 7
More stable control is carried out, because the requirement of voltage-withstand test is 0.8（+ 0.03, -0.03）The requirement of Mpa.
In order to cope with lithium battery in gas replenishment process, the entrance of inflation is battery liquid-filling mouth, and diameter is maintained at φ 3（+
0.03, -0.03）mm.Since the fluid injection mouth structure of lithium battery is special, and diameter is small.Therefore it needs to design special connection
Structure.As shown in Fig. 2, the connection structure includes transition connector 8, the other end of drive screw 10 is passed through into argon arc welding
Mode and rotation hand wheel 9 are reliably connected, and the other end of rotation hand wheel 9 bores spiral shell made in Great Britain in outer-cone by R series
Line is reliably connected with transition connector 8；10 lower end of the drive screw is welded and fixed with lower lock block 12.Further include O-shaped
Sealing ring 13,13 upper surface of the O-ring seal are bonded by double faced adhesive tape and lower lock block 12, and the O-ring seal sealing pushes
Gap between block 12 and the liquid injection hole 18 for testing battery.Hex nut 11 is spun on to the first half of drive screw 10, then will
10 head of drive screw is attached by argon arc welding with lower lock block 12, and 13 upper surface of O-ring seal is passed through double faced adhesive tape
It is bonded with lower lock block 12, the accuracy of holding position.In the threaded hole at the position that drive screw 10 is screwed among holder 17,
And reserved good position.Rotation hand wheel 9 is driven by rotating clockwise, while driving drive screw 10, lower lock block 12 and O-shaped close
Seal 13 carries out decline process, and by squeezing O-ring seal 13, seals up the fluid injection of lower lock block 12 and L135 types battery 15
Gap between hole 18, has the function that sealing.And then screw hex nut 11, have the function that fastening.
Further include chuck body 16 as shown in Fig. 1 and Fig. 4 a, 16 bottom of the chuck body is provided with for placing test electricity
The card slot in pond, 16 upper end of the chuck body are fixed with holder 17 by hexagon socket head cap screw 14.In in this way fixture being designed to
Empty U-shaped prevents lithium battery during inflating pressure, and two sides of lithium battery generate evagination deformation naturally.The fixture
Body is external frame with L135 types battery 15 as shown in Figure 3, and width direction is designed as the process in view of inflating pressure
The deformation bulging of middle free state battery has reserved space.And the deformation of battery is intermediate protrusion form, therefore in clamp body
Intermediate position use hollow working process.The processing of reserved battery case is used on the bottom of clamp body, and height controls
In 5mm.Main purpose is to effectively be positioned the position of L135 type batteries.The bearing of both sides is primarily to the later stage
The installation of holder provides stable supporting role.Side supports are the masters for requiring to be welded to clamp body according to the size of regulation
Above body.
After above-mentioned entire crush seal work is completed, tracheae is inserted into one end of transition connector 8, is then turned on
Unidirectional air pump 1, the pressure of gas is adjusted to 0.8（+ 0.03, -0.03）Mpa, the gas after pressure regulation enter mesuring battary it
It is interior, the gas replenishment process of 60s is carried out to mesuring battary.
The subsequent unidirectional air pump 1 of quick closedown then shows the sealing of battery if pressure gauge registration remains unchanged in 1min
Welding line voltage-withstand test passes through；Either decline suddenly if pressure gauge registration is gradually reduced in 1min, then shows battery
Sealing welding line voltage-withstand test does not pass through.
Tracheae is unpluged from transition connector 8 finally, and unscrews rotation hand wheel 9 counterclockwise, drive screw 10 is to moving up
It is dynamic, the compression relationship between O-ring seal 13 and the liquid injection hole 18 of L135 types battery 15 is released, entire test process terminates.
Although specific embodiments of the present invention have been described above, those skilled in the art should be appreciated that this
It is merely illustrative of, various changes or modifications can be made to present embodiment, without departing from the principle and substance of the present invention,
Protection scope of the present invention is only limited by the claims that follow.
Claims (7)
1. a kind of lithium battery free state seals welding line pressure resistant testing device, it is characterised in that：Including unidirectional air pump, the list
It is connected to air pump with pneumatic triple piece by check valve, the pneumatic triple piece is connected with stable-pressure device, the voltage stabilizing dress
It sets and is connected with tracheae, the tracheae is connected by connection structure with the liquid injection hole of test battery.
2. a kind of lithium battery free state described in accordance with the claim 1 seals welding line pressure resistant testing device, it is characterised in that：
The pneumatic triple piece includes sequentially connected air filter, pressure reducing valve and oil sprayer, the air filter and check valve
It is connected, the oil sprayer is connected with stable-pressure device.
3. a kind of lithium battery free state seals welding line pressure resistant testing device according to claim 2, it is characterised in that：
It is provided with pressure gauge on pipeline between the pressure reducing valve and oil sprayer.
4. a kind of lithium battery free state described in accordance with the claim 1 seals welding line pressure resistant testing device, it is characterised in that：
The connection structure includes transition connector, and the transition connector is sealed with rotation hand wheel upper end by threaded engagement, described
Handwheel lower end is screwed to be welded and fixed with drive screw upper end；The drive screw lower end is welded and fixed with lower lock block.
5. a kind of lithium battery free state seals welding line pressure resistant testing device according to claim 4, it is characterised in that：
Further include O-ring seal, the O-ring seal upper surface is bonded by double faced adhesive tape and lower lock block, under the O-ring seal sealing
Gap between briquetting and the liquid injection hole for testing battery.
6. a kind of lithium battery free state described in accordance with the claim 1 seals welding line pressure resistant testing device, it is characterised in that：
Further include chuck body, the chuck body bottom is provided with the card slot for placing test battery.
7. a kind of lithium battery free state seals welding line pressure resistant testing device according to claim 6, it is characterised in that：
The chuck body upper end is fixed with holder by hexagon socket head cap screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810463516.8A CN108645698A (en) | 2018-05-15 | 2018-05-15 | A kind of lithium battery free state sealing welding line pressure resistant testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810463516.8A CN108645698A (en) | 2018-05-15 | 2018-05-15 | A kind of lithium battery free state sealing welding line pressure resistant testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108645698A true CN108645698A (en) | 2018-10-12 |
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| CN201810463516.8A Pending CN108645698A (en) | 2018-05-15 | 2018-05-15 | A kind of lithium battery free state sealing welding line pressure resistant testing device |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033814A (en) * | 2020-08-19 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Multifunctional pressing tool for lithium battery |
| WO2023165153A1 (en) * | 2022-03-04 | 2023-09-07 | 无锡先导智能装备股份有限公司 | Detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112033814A (en) * | 2020-08-19 | 2020-12-04 | 合肥国轩高科动力能源有限公司 | Multifunctional pressing tool for lithium battery |
| WO2023165153A1 (en) * | 2022-03-04 | 2023-09-07 | 无锡先导智能装备股份有限公司 | Detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 213200 Jiangdong Avenue 1, Jintan District, Jiangsu, Changzhou Applicant after: AVIC lithium Technology Co.,Ltd. Address before: 213200 Jiangdong Avenue 1, Jintan District, Jiangsu, Changzhou Applicant before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant after: AVIC lithium Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC lithium Technology Co.,Ltd. Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC lithium Technology Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181012 |