CN201408148Y - Lithium battery pole welding strength detection device - Google Patents

Lithium battery pole welding strength detection device Download PDF

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Publication number
CN201408148Y
CN201408148Y CN200920131554XU CN200920131554U CN201408148Y CN 201408148 Y CN201408148 Y CN 201408148Y CN 200920131554X U CN200920131554X U CN 200920131554XU CN 200920131554 U CN200920131554 U CN 200920131554U CN 201408148 Y CN201408148 Y CN 201408148Y
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CN
China
Prior art keywords
measuring machine
force measuring
anchor clamps
cover plate
lithium battery
Prior art date
Application number
CN200920131554XU
Other languages
Chinese (zh)
Inventor
王记球
刘付勇
郭彦文
覃宇东
Original Assignee
深圳市比克电池有限公司
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 深圳市比克电池有限公司 filed Critical 深圳市比克电池有限公司
Priority to CN200920131554XU priority Critical patent/CN201408148Y/en
Application granted granted Critical
Publication of CN201408148Y publication Critical patent/CN201408148Y/en

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Abstract

The utility model discloses a lithium battery pole welding strength detection device comprising a base, a cover board clamp, a battery cell clamp and a force gauging mechanism, wherein the cover boardclamp, the battery cell clamp and the force gauging mechanism are installed on the base respectively, the cover board clamp and the battery cell clamp are arranged in a staggered manner, and the force gauging mechanism is positioned between the cover board clamp and the battery cell clamp. The lithium battery pole welding strength detection device has the advantages of simple structure, easy operation and high detection precision.

Description

A kind of lithium battery pole ear weld strength pick-up unit

Technical field

The utility model designs a kind of weld strength pick-up unit, particularly a kind of lithium battery pole ear weld strength pick-up unit.

Background technology

Existing lithium ion battery adopts multipole ear-pole connection structure usually, a plurality of lugs of at first burn-oning respectively on the positive and negative plate top of lithium battery, guarantee the good insulation performance performance by para tape, then positive and negative plate is twined through insulation barrier film space and around mandrel and form takeup type electricity core, will be welded on respectively on the cover plate of lithium battery from the lug that positive and negative plate is drawn at last.In the lithium battery, the welding quality between lug and the cover plate makes a big impact to the performance of lithium battery, if weld strength is not enough, then fracture easily causes loose contact and influences the battery operate as normal; If the electrode that post-rift electrode is opposite with another contacts, then may cause the lithium battery short circuit and cause more serious consequences such as battery failure even battery explosion.Therefore,, should in the lithium battery production run, the weld strength to lug detect effectively in order to guarantee stability and security, yet, also there is not to occur special weld strength pick-up unit at present at lug in the lithium ion battery.

The utility model content

Technical problem to be solved in the utility model is, overcomes the deficiencies in the prior art, and a kind of simple in structure, lithium battery pole ear weld strength pick-up unit that accuracy is high is provided.

The technical scheme that its technical matters that solves the utility model adopts is:

A kind of lithium battery pole ear weld strength pick-up unit comprises base, cover plate anchor clamps, electric core anchor clamps and force measuring machine; Described cover plate anchor clamps, electric core anchor clamps and force measuring machine are installed in respectively on the base, and described cover plate anchor clamps and electric core anchor clamps shift to install, and described force measuring machine is between cover plate anchor clamps and electric core anchor clamps.

Described electric core anchor clamps comprise that electric core clamps cylinder and clamps two electric core fixture blocks that cylinder links to each other with this electricity core, and two electric core fixture blocks are left and right distribution.

Described cover plate anchor clamps comprise that cover plate clamps cylinder and clamps two cover plate fixture blocks that cylinder links to each other with this cover plate, and two cover plate anchor clamps are left and right distribution.

Described force measuring machine comprise force cylinder and can be in certain infeed stroke reciprocating first force measuring machine and second force measuring machine, described first force measuring machine comprises first tautness meter, first elastic body and first blade that laterally connects successively, described second force measuring machine also comprises second tautness meter, second elastic body and second blade that laterally connects successively, and is staggered about described first blade and second blade.

Described first force measuring machine also comprises first guidepost of horizontal expansion, and described first guidepost is fixed on an end of first tautness meter, and described first elastic body and first blade all are enclosed within on this first guidepost.

Described force measuring machine also comprises the tautness meter fixed head, and described first tautness meter and second tautness meter all are fixed on the tautness meter fixed head.

Described first force measuring machine and the upper and lower distribution of second force measuring machine.

The lateral length of described first force measuring machine and second force measuring machine does not wait.

Described base also comprises and is arranged on its top, can drives the base cylinder that base moves up and down.

Also comprise rotating disk, this rotating disk has the station that a plurality of edges circumferentially distribute, and also is provided with for the station that rotates temporarily to stop with fixed test position to be monitored, and described base, cover plate anchor clamps, electric core anchor clamps and force measuring machine all are located at described detecting position top.

The beneficial effects of the utility model are, a kind of device that weld strength between lithium battery cover plate and the lug is detected by cover plate anchor clamps, electric core anchor clamps and force measuring machine is provided, obtain the intensity detection value in the time of when the certain infeed stroke of force measuring machine motion under the driving that detects cylinder and on the lug that blade is against need to detect, if detected value is within allowed band then illustrate that weld strength is qualified, this apparatus structure is operated and the accuracy height simply, easily, can effectively avoid because of not enough quality problems and the potential safety hazard that causes of weld strength.

Description of drawings

Fig. 1 is the lithium battery structure side view;

Fig. 2 is the lithium battery structure front view;

Fig. 3 is the local amplification stereogram of a kind of embodiment of battery pole ear weld strength pick-up unit of the present utility model;

Fig. 4 is another local amplification stereogram of embodiment shown in Figure 3;

Fig. 5 is second kind of embodiment stereographic map of battery pole ear weld strength pick-up unit of the present utility model.

Embodiment

Illustrated in figures 1 and 2 is lithium battery structure, anode ear 11 and negative electrode lug 12 all are welded to connect between cover plate 13 and electric core 14, in order to guarantee the good insulation performance performance, the welding position of anode ear 11 and negative electrode lug 12 is left and right distribution at the Width of lithium battery usually, also can be usually forward and backward staggered at the thickness direction of lithium battery, can avoid positive and negative lug contact like this and the lithium battery short circuit that causes.

As shown in Figure 2, has the gap that width is L between cover plate 13 and the electric core 14, L is approximately 1mm, in the weld strength testing process, the blade that thickness is about 0.5mm can go deep into this gap in the direction of arrows and be against anode ear 11 or negative electrode lug 12 on test weld strength between itself and the cover plate 13 respectively.

Fig. 3 is the local amplification stereogram of battery pole ear weld strength pick-up unit of the present invention, comprises base 2, cover plate anchor clamps 3, electric core anchor clamps 4 and force measuring machine 5, and wherein, cover plate anchor clamps 3, electric core anchor clamps 4 and force measuring machine 5 all are installed on the base 2.

Cover plate anchor clamps 3 are arranged on the top of base 2, comprise that cover plate clamps cylinder 31 and clamps two cover plate fixture blocks 32 that cylinder 31 links to each other with this cover plate, two cover plate fixture blocks 32 are left and right distribution, and the cover plate 13 that can will be placed on the lithium battery 1 between the cover plate fixture block 32 under cover plate clamps the driving of cylinder 31 clamps.Electricity core anchor clamps 4 are arranged on the bottom of base 1, shift to install with cover plate anchor clamps 3, comprise that electric core clamps cylinder (not drawing on the figure) and clamps two electric core fixture blocks 41 that cylinder links to each other with this electricity core, two electric core fixture blocks 41 lay respectively at the and arranged on left and right sides of base 2, can clamp the electric core 14 that will be placed between the electric core fixture block 41 under the driving of cylinder at electric core and clamp.

Force measuring machine 5 is arranged on base 2 one sides and between cover plate anchor clamps 3 and electric core anchor clamps 4, in the present embodiment, force measuring machine 5 is arranged on the left side of base 2.Force measuring machine 5 comprise force cylinder (not drawing among the figure) and can be in certain infeed stroke reciprocating first force measuring machine 51 and second force measuring machine 52, first force measuring machine 51 is arranged on the top of second force measuring machine 52 in the present embodiment, also can left and rightly distribute.Wherein, first force measuring machine 51 comprises first tautness meter 511, first elastic body 512 and first blade 513 that laterally connects successively; Second force measuring machine 52 also comprises second tautness meter 521, second elastic body 522 and second blade 523 that laterally connects successively, and described first blade 513 and second blade about 523 are staggered.First elastic body 512 and second elastic body 522 in the present embodiment all are spring, also can be other elastic parts; One end of first blade 513 and second blade 523 is separately fixed on first elastic body 512 and second elastic body 522, and its free end all has laminar cutter head, and thickness is about 0.5mm, but level is inserted the close clearance between cover plate 13 and the electric core 14.In the weld strength test process, first force measuring machine 51 and second force measuring machine 52 be feeding to the right simultaneously under the effect of dynamometry cylinder, direction of feed is shown in arrow among the figure, first blade 513 and second blade 523 are progressively close at the cover plate 13 of lithium battery 1 and the positive and negative lug between the electric core 14, until propping up positive and negative lug, when first force measuring machine 51 and second force measuring machine 52 move to prescribed stroke, promptly can read the reading of first tautness meter 511 and second tautness meter 521.

In the present embodiment, for force measuring machine 5 is not offset in the traverse feed process, ensure the accuracy of ruggedness test, first force measuring machine 51 also can comprise first guidepost 514 of horizontal expansion, this first guidepost 514 is fixed on the right-hand member of first tautness meter 511, first elastic body 512 and first blade 513 all overlap thereon, thereby are difficult for skew taking place or rocking.Similarly, second force measuring machine 52 also can be provided with the second same guidepost 524.Force measuring machine 5 also can comprise tautness meter fixed head 53, first tautness meter 511 and second tautness meter 512 all are fixed on this tautness meter fixed head 53, thereby can guarantee the consistance of first force measuring machine 51 and 52 feed motions of second force measuring machine, the accuracy that has further improved ruggedness test.In the present embodiment, first force measuring machine 51 and second force measuring machine 52 go to upper and lower distribution, correspondingly, and the also correspondingly upper and lower distribution of first blade 513 and second blade 523.First force measuring machine 51 and second force measuring machine 52 also can about distribute, this moment, first tautness meter 511 and second tautness meter 521 all can be fixed on a side of pulling force fixed head 53.In addition, with reference to lithium battery structure shown in Figure 2, anode ear 11 and negative electrode lug 12 are forward and backward staggered at the thickness direction of lithium battery 1, this moment, the lateral length of first force measuring machine 51 and second force measuring machine 52 did not wait, accordingly, the end of first blade 513 and second blade 523 can be against respectively on the positive and negative plate that is staggered front to back.

Be illustrated in figure 5 as second kind of embodiment stereographic map of battery pole ear weld strength pick-up unit of the present utility model, base 2 in the present embodiment also comprises base cylinder 21, base cylinder 21 is arranged on the top of base 2, base 2 and cover plate anchor clamps 3 mounted thereto, electric core anchor clamps 4 and anchor clamps force measuring machine 5 are all moved up and down thereupon, in the present embodiment, the a plurality of stations 61 that have a plurality of circumferential distributions on the rotating disk 6 have all been placed the electric core 1 of lug weld strength to be detected on each station 61.Some stations 61 on rotating disk 6 rotate to the below of base 2, and base cylinder 21 driving bases 2 are fed down to suitable position this electricity core is carried out the detection of lug weld strength, so this embodiment is more convenient and practical.

The detection step of the lithium battery pole ear weld strength pick-up unit of present embodiment is as follows: earlier lithium battery to be detected 1 is placed on detecting position, the two cover plates fixture block 32 of cover plate anchor clamps 3 clamps cover plate 13 under the driving of cover plate clamping cylinder 31, then, two of electric core anchor clamps 4 electric core fixture blocks 42 clamp electric core 14 under the driving of electric core clamping cylinder.Wherein, more than step that cover plate 13 and electric core 14 are clamped respectively can change according to demand, perhaps carry out simultaneously.After the clamping step is finished, traverse feed takes place in first force measuring machine 51 and second force measuring machine 52 simultaneously under the driving of dynamometry cylinder, first blade 513 and second blade 523 progressively insert the gap between cover plate 13 and the electric core 14 and are against on the positive and negative plate, when first force measuring machine 51 and second force measuring machine 52 move to the specified standard position, then read the detected value on first tautness meter 511 and second tautness meter 521.At last, two detected values that obtain are analyzed, if this detected value within reasonable range, illustrates then that the lug weld strength meets the requirements, otherwise the lug weld strength can not meet the demands.

The weld strength pick-up unit of present embodiment can carry out weld strength to the electric core 1 of vertical placement and detect, if desired to horizontal positioned or the electric core of placing at a certain angle 1 carry out weld strength and detect, then the direction that is provided with of corresponding cover plate anchor clamps 3, electric core anchor clamps 4 and force measuring machine 5 all correspondingly changes in this device, this moment, force measuring machine 5 can be downwards or the feeding of other directions, the blade that is positioned at the end is contacted with positive and negative lug and obtains the intensity detection value.These embodiments are also included within the protection domain of the present utility model.

The utility model lithium battery pole ear weld strength pick-up unit detects by the weld strength between cover plate anchor clamps 3, electric core anchor clamps 4 and 5 pairs of lithium batteries of force measuring machine, 1 cover plate 13 and the lug, when force measuring machine 5 certain stroke that under the driving of force cylinder 51, moves, and obtain the intensity detection value on the lug that blade end is against need to detect the time, itself and standard figures are compared and determine whether the lug weld strength is qualified, simple, the operation easily of this apparatus structure.

This device also can comprise a rotating disk 6, this rotating disk 6 comprises the station that a plurality of edges circumferentially distribute, also being provided with a station for rotation temporarily stops with fixed test position to be monitored, base 2, cover plate anchor clamps 3, electric core anchor clamps 4 and force measuring machine 5 all are arranged on the detecting position top, certain station on rotating disk 6 rotates to detecting position, base 2 moves downward to suitable position lithium battery 1 is carried out the detection of lug weld strength, so this device provides great convenience for the staff.This pick-up unit accuracy in detection height, good reliability can effectively be avoided because of solid quality problems and the potential safety hazard that causes of the not prison welding between positive and negative lug and the cover plate 13.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims (10)

1. a lithium battery pole ear weld strength pick-up unit is characterized in that: comprise base, cover plate anchor clamps, electric core anchor clamps and force measuring machine; Described cover plate anchor clamps, electric core anchor clamps and force measuring machine are installed in respectively on the base, and described cover plate anchor clamps and electric core anchor clamps shift to install, and described force measuring machine is between cover plate anchor clamps and electric core anchor clamps.
2. lithium battery pole ear weld strength pick-up unit according to claim 1 is characterized in that: described electric core anchor clamps comprise that electric core clamps cylinder and clamps two electric core fixture blocks that cylinder links to each other with this electricity core, and two electric core fixture blocks are left and right distribution.
3. lithium battery pole ear weld strength pick-up unit according to claim 1 is characterized in that: described cover plate anchor clamps comprise that cover plate clamps cylinder and clamps two cover plate fixture blocks that cylinder links to each other with this cover plate, and two cover plate anchor clamps are left and right distribution.
4. according to each described lithium battery pole ear weld strength pick-up unit in the claim 1 to 3, it is characterized in that: described force measuring machine comprise force cylinder and can be in certain infeed stroke reciprocating first force measuring machine and second force measuring machine, described first force measuring machine comprises first tautness meter, first elastic body and first blade that laterally connects successively, described second force measuring machine also comprises second tautness meter, second elastic body and second blade that laterally connects successively, and is staggered about described first blade and second blade.
5. lithium battery pole ear weld strength pick-up unit according to claim 4, it is characterized in that: described first force measuring machine also comprises first guidepost of horizontal expansion, described first guidepost is fixed on an end of first tautness meter, and described first elastic body and first blade all are enclosed within on this first guidepost.
6. lithium battery pole ear weld strength pick-up unit according to claim 5, it is characterized in that: described force measuring machine also comprises the tautness meter fixed head, described first tautness meter and second tautness meter all are fixed on the tautness meter fixed head.
7. lithium battery pole ear weld strength pick-up unit according to claim 5 is characterized in that: described first force measuring machine and the upper and lower distribution of second force measuring machine.
8. lithium battery pole ear weld strength pick-up unit according to claim 5 is characterized in that: the lateral length of described first force measuring machine and second force measuring machine does not wait.
9. lithium battery pole ear weld strength pick-up unit according to claim 5 is characterized in that: described base also comprises and is arranged on its top, can drives the base cylinder that base moves up and down.
10. lithium battery pole ear weld strength pick-up unit according to claim 9, it is characterized in that: also comprise rotating disk, this rotating disk has the station that a plurality of edges circumferentially distribute, the station that also is provided with for rotation temporarily stops with fixed test position to be monitored, and described base, cover plate anchor clamps, electric core anchor clamps and force measuring machine all are located at described detecting position top.
CN200920131554XU 2009-05-07 2009-05-07 Lithium battery pole welding strength detection device CN201408148Y (en)

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Application Number Priority Date Filing Date Title
CN200920131554XU CN201408148Y (en) 2009-05-07 2009-05-07 Lithium battery pole welding strength detection device

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Application Number Priority Date Filing Date Title
CN200920131554XU CN201408148Y (en) 2009-05-07 2009-05-07 Lithium battery pole welding strength detection device

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102062721A (en) * 2010-12-13 2011-05-18 天津力神电池股份有限公司 Fixture for testing welding tension of battery core
CN103017964A (en) * 2012-12-24 2013-04-03 天津力神电池股份有限公司 Testing device for rivet force between battery cover and cathode nickel sheet
CN104330247A (en) * 2014-09-20 2015-02-04 宁国市华晟塑胶制品有限公司 Product automatic detection apparatus
CN105021463A (en) * 2014-04-28 2015-11-04 深圳市金洲精工科技股份有限公司 Welding strength detection mechanism
CN105259109A (en) * 2015-10-28 2016-01-20 环维电子(上海)有限公司 Coating adhesive force test fixture
CN109238610A (en) * 2018-09-19 2019-01-18 惠州亿纬锂能股份有限公司 A kind of lithium battery pole welding strength appraisal procedure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102062721A (en) * 2010-12-13 2011-05-18 天津力神电池股份有限公司 Fixture for testing welding tension of battery core
CN103017964A (en) * 2012-12-24 2013-04-03 天津力神电池股份有限公司 Testing device for rivet force between battery cover and cathode nickel sheet
CN105021463A (en) * 2014-04-28 2015-11-04 深圳市金洲精工科技股份有限公司 Welding strength detection mechanism
CN105021463B (en) * 2014-04-28 2018-02-23 深圳市金洲精工科技股份有限公司 A kind of weld strength testing agency
CN104330247A (en) * 2014-09-20 2015-02-04 宁国市华晟塑胶制品有限公司 Product automatic detection apparatus
CN105259109A (en) * 2015-10-28 2016-01-20 环维电子(上海)有限公司 Coating adhesive force test fixture
CN105259109B (en) * 2015-10-28 2018-06-22 环维电子(上海)有限公司 Coating adhesion measurement jig
CN109238610A (en) * 2018-09-19 2019-01-18 惠州亿纬锂能股份有限公司 A kind of lithium battery pole welding strength appraisal procedure

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Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20170616

Address after: 518119 Beek Industrial Zone, Kwai Chung street, Dapeng New District, Guangdong, Shenzhen

Patentee after: SHENZHEN BAK BATTERY CO., LTD.

Address before: Kwai Chung street Beek Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119

Patentee before: Shenzhen Bak Battery Co., Ltd.

TR01 Transfer of patent right
CX01 Expiry of patent term

Granted publication date: 20100217

CX01 Expiry of patent term