CN109000538A - Lithium ion battery expansion displacement test device - Google Patents
Lithium ion battery expansion displacement test device Download PDFInfo
- Publication number
- CN109000538A CN109000538A CN201811107820.5A CN201811107820A CN109000538A CN 109000538 A CN109000538 A CN 109000538A CN 201811107820 A CN201811107820 A CN 201811107820A CN 109000538 A CN109000538 A CN 109000538A
- Authority
- CN
- China
- Prior art keywords
- fixed block
- ion battery
- lithium ion
- guide post
- test 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
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
Abstract
The invention discloses a kind of lithium ion battery expansion displacement test devices; original state pushes movable plate to contact battery core by the spring of certain spring constant; after the expansion of battery core test process; movable plate is pushed; the cooperation of more guide post guide sleeves ensures movable plate parallel sliding; scale setting on guide post directly reads different moments battery core expanded thickness, and can be averaged by the reading value on multiple guide posts, and the inclination bring error for further decreasing movable plate influences；Compared with the prior art, convenient test is convenient, and can accurately measure includes stingy pressure cell expansion thickness in various situations, testing efficiency is improved, test result levels of precision is increased, equipment improving cost is lower, it is flexible in application during routine work, improve working efficiency.
Description
Technical field
The present invention relates to lithium ion battery test device field, especially a kind of lithium ion battery expansion displacement test dress
It sets.
Background technique
Lithium ion battery is high as a kind of specific capacity, has extended cycle life, environmental-friendly secondary cell, is widely used in just
The fields such as portable device and electric car.In recent years, being proposed more with the rapid development of electric car to lithium ion battery
High requirement.Inside lithium ion cell expansive force is generally higher when loop test at present, there is the expansion displacement in certain thickness direction.
Especially power battery core aluminum hull is developed and in application, needs to be grasped aluminum hull deflection and pressure release under different air pressures
Aluminum hull moulding remaining deformation afterwards, to estimate the bulging problem being likely to occur in battery core use process.But it does not close still at present
Suitable special measurement fixture, generally clamps aluminum hull using two boards, with the distance between vernier caliper measurement two boards, but it is this
Mode error is too big, and measurement result is unreliable, especially influences greatly, to develop to aluminum hull in stingy pressure deformation result on aluminum hull
Work brings certain puzzlement.
Summary of the invention
Goal of the invention: in order to solve the problems of prior art, the present invention provides a kind of expansions of lithium ion battery
Displacement tester, improvement structure is simple, convenient test, and can accurately measure in various situations includes that stingy pressure cell expansion is thick
Degree improves testing efficiency.
Technical solution: in order to achieve the above objectives, following technical solution can be used in the present invention: lithium ion battery expansion displacement is surveyed
Trial assembly is set, and pedestal is specifically included；The first fixed block, the second fixed block and movable block are vertically equipped on the pedestal；Described
One fixed block and the second lower end of fixing block are fixed on pedestal, and the movable block is movably set in first by multiple first guide posts
Between fixed block and the second fixed block；
First guide post one end is fixed on the first fixed block by fixed ring, and the other end passes through movable block and extends solid
It is scheduled on the second fixed block inner sidewall；First guide post is equipped with scale, and the portion between the first fixed block and movable block
Position outer cover is equipped with spring；Clearance distance under spring original state between movable block and the second fixed block is less than lithium ion to be measured
The thickness of battery；
First guide post at least two, be divided into two ends of movable block and between gap be sufficient to accommodate lithium to be measured from
The placement of sub- battery.
First fixed block and the second fixed block are respectively arranged on the both sides of the edge position of pedestal；Reasonable disposition structure, can
To reduce the size of single unit system.
First guide post is arranged on movable block by the guide sleeve of dimensional fits；Guide sleeve uses linear bearing structure and leads
The pin deck frictional resistance that is engaged is smaller, on the one hand plays accurate guiding and guarantees movable block parallel sliding, and then guarantees that thickness is surveyed
The precision of magnitude, as far as possible reduction error source；The size of another aspect guide sleeve is cooperated with the first guide post, without to activity
The size of corresponding aperture is accurately controlled on block, reduces installation cost.
The first guide post quantity is 4, respectively uniformly at four first fixed block, the second fixed block endpoints；
The guide post is arranged on movable block by the guide sleeve of dimensional fits；Four the first guide posts are uniformly arranged at four endpoints, and one
Movable block squeezes the balance consistent degree of each stress point in spring moving process, another party when aspect can increase cell expansion
Face can be averaged by expanding the reading difference of front and back on four first guide posts, further decrease the small skew of movable plate
Bring error influences.
The second guide post is additionally provided between the movable block and the first fixed block；Second guide post one end is solid by support base
Due to movable block centre；Other end activity is worn in the hole of the first fixed block center setting；The second guide post of centre
Setting further increases stable steering stress point, reduces test error.
Second guide post is equipped with scale；The data that a centre can be increased further decrease the micro- of movable plate
Small inclination bring error influences.
The spring constant of the spring is 0.4-0.8N/mm；The elastic force of the spring of this spring constant is appropriate, will not be because of not
It easily stretches or is excessively easy to stretch and have an adverse effect to test process and result, spring constant is excessive will to hinder battery swollen
It is swollen.
Further, the spring constant of the spring is 0.5N/mm.
The utility model has the advantages that a kind of lithium ion battery expansion displacement test device disclosed in this invention, compared with prior art,
Have the advantage that structure is simple, convenient test is convenient, and can accurately measure in various situations includes that stingy pressure cell expansion is thick
Degree improves testing efficiency, increases test result levels of precision, and equipment improving cost is lower, using spirit during routine work
It is living, improve working efficiency.
Detailed description of the invention
Fig. 1 is the schematic perspective view of 1 lithium ion battery expansion displacement test device of the embodiment of the present invention；
Fig. 2 is the schematic view of the front view of 1 lithium ion battery expansion displacement test device of the embodiment of the present invention；
Fig. 3 is movable block and second on the first guide post of 1 lithium ion battery expansion displacement test device of the embodiment of the present invention
Enlarged structure schematic diagram between fixed block.
Specific embodiment
Embodiment 1:
It please refers to shown in Fig. 1-3, the invention discloses a kind of lithium ion battery expansion displacement test devices, specifically include bottom
Seat 1；The first fixed block 2, the second fixed block 3 and movable block 4 are vertically equipped on the pedestal 1；Three is arranged in parallel, and described
One fixed block 2 and 3 lower end of the second fixed block are fixed on pedestal 1, and are respectively arranged on the left and right side edge of pedestal 1；
Reasonable disposition structure can reduce the size of single unit system.
The movable block 4 is movably set in the first fixed block 2 and second with graduated first guide post 5 by four and fixes
Between block 3；Location external of first guide post 5 between the first fixed block 2 and movable block 4 is arranged with spring 53；The spring
Spring constant is 0.5N/mm；The elastic force of the spring of this spring constant is appropriate, will not be flexible or flexible pair excessively easy because of being not easy
Test process and result have an adverse effect, and spring constant is excessive will to hinder cell expansion.It is movable under 53 original state of spring
Clearance distance between block 4 and the second fixed block 3 is less than the thickness of lithium ion battery 100 to be measured.
Four the first guide posts 5 are respectively uniformly at 3 four first fixed block 2, the second fixed block endpoints；Two ends
Between gap be sufficient to accommodate the placement of lithium ion battery 100 to be measured.Four the first guide posts 5 are uniformly arranged at four endpoints, and one
Movable block 4 squeezes the balance consistent degree of each stress point in spring moving process when aspect can increase cell expansion, another
Aspect can be averaged by expanding the reading difference of front and back on four first guide posts 5, further decrease the small of movable plate
Tilting bring error influences.
Described first guide post, 5 one end is fixed on the first fixed block 1 by fixed ring 51, and the other end passes through movable block 4 simultaneously
Extension is fixed on 3 inner sidewall of the second fixed block；First guide post 5 is arranged in movable block 4 by the guide sleeve 52 of dimensional fits
On；Guide sleeve 53 is smaller using linear bearing structure and 5 point contact friction fit resistance of the first guide post, on the one hand plays accurate guiding
Guarantee the parallel sliding of movable block 4, and then guarantee the precision of thickness measurements, as far as possible reduction error source；On the other hand it leads
The size of set 53 is cooperated with the first guide post 5, is accurately controlled without the size to corresponding aperture on movable block 4, and dress is reduced
It is set to this.
It is additionally provided between the movable block 4 and the first fixed block 5 and sets graduated second guide post 6；Second guide post 6 one
The centre of movable block 4 is fixed at end by support base 61；Other end activity wears the hole of 1 center of the first fixed block setting
In；The setting of the second guide post of centre 6 further increases stable steering stress point, reduces test error.In addition, can increase
The data in one centre are averaged together with the data difference read on four the first guide posts 5, further decrease movable plate
Small skew bring error influence.
The course of work:
Lithium ion battery 100 to be measured is placed on pedestal 1 and is arranged between movable block 4 and the second fixed block 3, initially
When state, the clearance distance between the movable block 4 and the second fixed block 3 is less than the thickness of lithium ion battery 100 to be measured, to be measured
When lithium ion battery is placed by spring 53 carry out clamping after slight squeeze be placed in movable block 4 and the second fixed block 3 it
Between；Read the initial reading on four the first guide posts 5 and the second guide post 6, promotion activity after lithium ion battery 100 to be measured expands
Plate 4, movable plate 4 are pushed, the common work of the second guide post 5 of the cooperation and centre of four the first guide posts 5 and guide sleeve 53
Under, it is ensured that the parallel sliding of movable block 4, device reads the expansion on four the first guide posts 5 and the second guide post 6 after stablizing after
Reading, it is corresponding to calculate reading difference, five reading differences are averaged, to obtain cell expansion displacement data.
Testing example:
The lithium ion battery expansion displacement test device of Example 1 carries out expansion displacement test to 27148 lithium iron batteries,
Data record is as shown in table 1:
1 27148 lithium iron battery lithium ion battery expansion displacement test record of table and calculating
As it can be seen from table 1 deviation is smaller between the test data of multiple guide posts, five points are taken to carry out test and be averaged
Value further reduced test error.
A kind of lithium ion battery expansion displacement test device disclosed by the invention convenient and efficient can accurately test out various
The expansion displacement data of the lithium ion battery of gauge size specification compare with traditional manual test, hence it is evident that testing efficiency is improved,
Increasing test result levels of precision, equipment improving cost is lower, and it is flexible in application during routine work, improve working efficiency.
Claims (8)
1. lithium ion battery expansion displacement test device, it is characterised in that including pedestal (1)；It is vertically equipped on the pedestal (1)
First fixed block (2), the second fixed block (3) and movable block (4)；First fixed block (2) and the second fixed block (3) lower end
It is fixed on pedestal (1), the movable block (4) is movably set in the first fixed block (2) and second by multiple first guide posts (5)
Between fixed block (3)；
Described first guide post (5) one end is fixed on the first fixed block (1) by fixed ring (51), and the other end passes through movable block
(4) and extension is fixed on the second fixed block (3) inner sidewall；First guide post (5) is equipped with scale, and in the first fixed block
(2) location external between movable block (4) is arranged with spring (53)；Movable block (4) and second under spring (53) original state
Clearance distance between fixed block (3) is less than the thickness of lithium ion battery to be measured (100)；
First guide post (5) at least two, be divided into (4) two ends of movable block and between gap be sufficient to accommodate lithium to be measured
The placement of ion battery (100).
2. lithium ion battery expansion displacement test device according to claim 1, it is characterised in that: first fixed block
(2) and the second fixed block (3) is respectively arranged on the both sides of the edge position of pedestal (1).
3. lithium ion battery expansion displacement test device according to claim 1, it is characterised in that: first guide post
(5) it is arranged on movable block (4) by the guide sleeve of dimensional fits (52).
4. lithium ion battery expansion displacement test device according to claim 1, it is characterised in that: first guide post
(5) quantity is 4, respectively uniformly at (3) four first fixed block (2), the second fixed block endpoints；First guide post
(5) it is arranged on movable block (4) by the guide sleeve of dimensional fits (52).
5. lithium ion battery expansion displacement test device according to claim 1 or 5, it is characterised in that: the movable block
(4) it is additionally provided between the first fixed block (5) the second guide post (6)；Described second guide post (6) one end is fixed by support base (61)
In movable block (4) centre；Other end activity is worn in the hole of the first fixed block (1) center setting.
6. lithium ion battery expansion displacement test device according to claim 5, it is characterised in that: second guide post
(6) it is equipped with scale.
7. lithium ion battery expansion displacement test device according to claim 1, it is characterised in that: the spring (53)
Spring constant is 0.4-0.8N/mm.
8. lithium ion battery expansion displacement test device according to claim 7, it is characterised in that: the spring (53)
Spring constant is 0.5N/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107820.5A CN109000538A (en) | 2018-09-21 | 2018-09-21 | Lithium ion battery expansion displacement test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107820.5A CN109000538A (en) | 2018-09-21 | 2018-09-21 | Lithium ion battery expansion displacement test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109000538A true CN109000538A (en) | 2018-12-14 |
Family
ID=64591997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811107820.5A Pending CN109000538A (en) | 2018-09-21 | 2018-09-21 | Lithium ion battery expansion displacement test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109000538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696111A (en) * | 2018-12-27 | 2019-04-30 | 蜂巢能源科技有限公司 | Test the method and its application of the expansion rate of electrode active material |
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| CN204421806U (en) * | 2015-02-09 | 2015-06-24 | 广东坚朗五金制品股份有限公司 | Height measuring device |
| CN105397682A (en) * | 2015-12-15 | 2016-03-16 | 刘文生 | Fixing frame capable of measuring height |
| WO2016085271A1 (en) * | 2014-11-26 | 2016-06-02 | 주식회사 엘지화학 | Device and method for measuring thickness of secondary battery cell |
| CN205482719U (en) * | 2016-03-29 | 2016-08-17 | 甘肃郝氏炭纤维有限公司 | Carbon felt thickness gauge |
| KR20170041538A (en) * | 2015-10-07 | 2017-04-17 | 에스케이이노베이션 주식회사 | Apparatus for measuring thickness of bettery cell |
| CN207688856U (en) * | 2017-12-26 | 2018-08-03 | 北京国能电池科技有限公司 | Battery core thickness testing device |
| CN208998694U (en) * | 2018-09-21 | 2019-06-18 | 力信（江苏）能源科技有限责任公司 | Lithium ion battery expansion displacement test device |
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2018
- 2018-09-21 CN CN201811107820.5A patent/CN109000538A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201233218Y (en) * | 2008-06-30 | 2009-05-06 | 深圳市比克电池有限公司 | Battery thickness measuring instrument |
| CN201773892U (en) * | 2010-08-03 | 2011-03-23 | 天津力神电池股份有限公司 | Lithium ion battery pole group reshaping and detection device |
| WO2016085271A1 (en) * | 2014-11-26 | 2016-06-02 | 주식회사 엘지화학 | Device and method for measuring thickness of secondary battery cell |
| CN204421806U (en) * | 2015-02-09 | 2015-06-24 | 广东坚朗五金制品股份有限公司 | Height measuring device |
| KR20170041538A (en) * | 2015-10-07 | 2017-04-17 | 에스케이이노베이션 주식회사 | Apparatus for measuring thickness of bettery cell |
| CN105397682A (en) * | 2015-12-15 | 2016-03-16 | 刘文生 | Fixing frame capable of measuring height |
| CN205482719U (en) * | 2016-03-29 | 2016-08-17 | 甘肃郝氏炭纤维有限公司 | Carbon felt thickness gauge |
| CN207688856U (en) * | 2017-12-26 | 2018-08-03 | 北京国能电池科技有限公司 | Battery core thickness testing device |
| CN208998694U (en) * | 2018-09-21 | 2019-06-18 | 力信（江苏）能源科技有限责任公司 | Lithium ion battery expansion displacement test device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696111A (en) * | 2018-12-27 | 2019-04-30 | 蜂巢能源科技有限公司 | Test the method and its application of the expansion rate of electrode active material |
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