CN106025372B - A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function - Google Patents
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function Download PDFInfo
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- CN106025372B CN106025372B CN201610652455.0A CN201610652455A CN106025372B CN 106025372 B CN106025372 B CN 106025372B CN 201610652455 A CN201610652455 A CN 201610652455A CN 106025372 B CN106025372 B CN 106025372B
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- lithium battery
- plastic film
- conducting probe
- aluminum
- insulating support
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 59
- 238000009413 insulation Methods 0.000 title claims abstract description 47
- 239000002985 plastic film Substances 0.000 title claims abstract description 44
- 229920006255 plastic film Polymers 0.000 title claims abstract description 44
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 73
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 41
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004411 aluminium Substances 0.000 claims abstract description 16
- 210000004072 lung Anatomy 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 abstract description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a kind of lithium battery aluminum-plastic film sealing machines with online Insulation monitoring function, when work, upper cover pedestal drives upper cover and the first insulating support to move downwardly together, low head pedestal drives low head and the second insulating support to move upwardly together, upper cover and low head jointly seal aluminum plastic film on lithium battery side, first conducting probe is contacted with positive pole ear on lithium battery, second conducting probe is contacted with negative lug on lithium battery, and third conducting probe is lunged in aluminum plastic film and is contacted with its aluminium layer, first Insulation Resistance Tester is detected the internal short-circuit of lithium battery, to the aluminium layer in lithium battery, whether short circuit is detected second Insulation Resistance Tester with negative lug.This case realizes the function that online Insulation monitoring is carried out while lithium battery aluminum-plastic film encapsulates, its practicality easy to detect, the cost of Insulation test one by one is carried out to lithium battery using manually after encapsulation can be reduced and the probability of erroneous judgement can be reduced, is conducive to improve working efficiency.
Description
[technical field]
The present invention relates to a kind of lithium battery aluminum-plastic film sealing machines with online Insulation monitoring function.
[background technology]
Lithium ion battery is compared with the other kinds of batteries such as plumbic acid, cadmium nickel with capacity is big, operating voltage is high, charging is fast
Degree is fast, operating temperature range is wide, the advantages that having extended cycle life, is small, is light-weight.Lithium ion battery is widely used at present
The fields such as mobile phone, laptop, electric tool, and its will be used wider and wider it is general.
Lithium ion battery is the most extensive by the way of aluminum plastic film flexible package at present, and flexible package lithium cell is than other encapsulation knots
The battery of structure has prodigious advantage, but since the aluminium layer among aluminum plastic film is easily caused with negative lug short circuit in cell package
Aluminium layer is corroded after follow-up battery core electrification, thus flexible package lithium cell production process can increase several roads to aluminum plastic film whether with it is negative
The bad process being detected of pole lug short circuit, at the same lithium ion battery another kind it is bad be internal short-circuit, battery is just
The flaw on burr, dust and isolation film on cathode pole piece can all cause internal short-circuit, therefore also need the work of internal inspection
Sequence chooses defective products.Artificial full inspection together can be arranged in most of soft bag lithium ionic cell manufacturers after battery closedtop process
Aluminum plastic film and whether short-circuit and battery internal short-circuit the detection process of negative lug, but since manual detection efficiency is more low, and
It is more demanding to the sense of responsibility of operation technique and employee, often there are many defective products to be not detected.
Therefore, how to overcome above-mentioned defect, it has also become those skilled in the art's important topic urgently to be resolved hurrily.
[invention content]
The invention overcomes the shortcomings of the above-mentioned technology and provides a kind of lithium battery plastic-aluminums with online Insulation monitoring function
Film sealing machine, convenient for carrying out the online Insulation monitoring of lithium battery when packaged.
To achieve the above object, present invention employs following technical proposals：
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function, includes upper cover pedestal 1 and lower envelope
Head pedestal 2, the upper cover pedestal 1 are connected with the first insulating support 11 to side directions and are in downward direction connected with for encapsulating
The upper cover 12 of aluminum plastic film 4 on 3 side of lithium battery, the low head pedestal 2 are connected with the second insulating support 21 to side directions
It is connected with the low head 22 for encapsulating aluminum plastic film 4 on 3 side of lithium battery, first insulating support 11 and with upward direction
Between two insulating supports 21 be equipped with workbench 5, first insulating support 11 be equipped with for positive pole ear 31 on lithium battery 3
The first conducting probe 61 and the second conducting probe 62 for contact with negative lug 32 on lithium battery 3 of contact and be used for
The third conducting probe 63 that aluminium layer contacts in aluminum plastic film 4, between first conducting probe 61 and second conducting probe 62
It is electrically connected with the first Insulation Resistance Tester 71, is electrically connected between second conducting probe 62 and third conducting probe 63
Two Insulation Resistance Testers 72, second insulating support 21 is equipped with lunges the plastic-aluminum convenient for the third conducting probe 63
Insulation soft block 8 in film 4 to be contacted with aluminium layer.
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function as described above, the described first conductive spy
Needle 61 and the second conducting probe 62 can move on first insulating support 11.
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function as described above, the first insulation branch
Frame 11 is equipped with horizontal guide slot 111, has the first needle stand 611, second by screw connection respectively on the horizontal guide slot 111
Needle stand 621 and third needle stand 631, first conducting probe 61 are mounted on first needle stand 611, and described second leads
Electric probe 62 is mounted on second needle stand 621, and the third conducting probe 63 is mounted on the third needle stand 631.
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function as described above, the described first conductive spy
For needle 61 by 612 elastic connection of the first spring on first needle stand 611, second conducting probe 62 passes through second spring
622 elastic connections are on second needle stand 621.
A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function as described above, the horizontal guide slot
The first insulating support 11 at 111 notches is equipped with and 111 scale 112 disposed in parallel of the horizontal guide slot.
Compared with prior art, the beneficial effects of the invention are as follows：
1, this case can carry out the online Insulation monitoring of lithium battery when packaged, and when work, the upper cover pedestal drives
The upper cover and the first insulating support move downwardly together, and the low head pedestal drives the low head and the second insulation branch
Frame moves upwardly together, and the upper cover and low head jointly seal aluminum plastic film on lithium battery side, at this moment, described
One conducting probe is contacted with positive pole ear on lithium battery, second conducting probe is contacted with negative lug on lithium battery and
The third conducting probe lunges in the aluminum plastic film to be contacted with its aluminium layer, in this way, first Insulation Resistance Tester is to lithium
The internal short-circuit of battery is detected, that is, detects positive pole ear and whether negative lug is short-circuit, second Insulation Resistance Tester
To the aluminium layer in lithium battery, whether short circuit is detected with negative lug, if the first Insulation Resistance Tester sends out the buzzing of short circuit
Alarm, then lithium battery is internal short-circuit, if second Insulation Resistance Tester sends out the buzzing alarm of short circuit, lithium electricity
Pond is the short circuit of negative lug and aluminium layer in aluminum plastic film, when finding above-mentioned unfavorable condition, then takes out defective products after encapsulation
To reprocess etc., this case realizes the function that online Insulation monitoring is carried out while lithium battery aluminum-plastic film encapsulates, detection
It is convenient and practical, the cost of Insulation test one by one is carried out to lithium battery using manually after encapsulation can be reduced and erroneous judgement can be reduced
Probability, be conducive to improve working efficiency.
2, first conducting probe and the second conducting probe can move on first insulating support, in this way, just
In when it is implemented, by adjusting with by the first conducting probe opposite direction positive pole ear below and by the second conducting probe opposite direction
Negative lug below, in order to the first conducting probe described in when aluminum plastic film encapsulates can be connect with the positive pole ear with it is described
Second conducting probe can be contacted with the negative lug.
3, first conducting probe is connected to by the first spring on first needle stand, the described second conductive spy
Needle by second spring elastic connection on second needle stand, it is described in this way, when first insulating support moves downward
First conducting probe move downward and moved downward with the positive pole ear Elastic Contact and second conducting probe and with institute
Negative lug Elastic Contact is stated, in this way, being conducive to not weigh lug wounded while ensureing contact in place.
[description of the drawings]
Fig. 1 is the structural schematic diagram of this case.
Fig. 2 is the specific schematic diagram of the first insulating support of this case.
[specific implementation mode]
Feature of present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, so as to
In the understanding of technical staff of the same trade：
As shown in Figure 1, a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function, includes upper cover base
Seat 1 and low head pedestal 2, the upper cover pedestal 1 are connected with the first insulating support 11 to side directions and in downward direction connect
It is useful for the upper cover 12 of aluminum plastic film 4 on 3 side of encapsulation lithium battery, the low head pedestal 2 is connected with second to side directions
Insulating support 21 and upward direction are connected with the low head 22 for encapsulating aluminum plastic film 4 on 3 side of lithium battery, first insulation
Between holder 11 and the second insulating support 21 be equipped with workbench 5, first insulating support 11 be equipped with for lithium battery 3
The first conducting probe 61 that positive pole ear 31 contacts and the second conducting probe 62 for being contacted with negative lug 32 on lithium battery 3
And the third conducting probe 63 for being contacted with aluminium layer in aluminum plastic film 4, first conducting probe 61 are conductive with described second
The first Insulation Resistance Tester 71 is electrically connected between probe 62, between second conducting probe 62 and third conducting probe 63
It is electrically connected with the second Insulation Resistance Tester 72, second insulating support 21 is equipped with to be pierced convenient for the third conducting probe 63
Into the insulation soft block 8 to be contacted with aluminium layer in the aluminum plastic film 4.
As described above, the operation principle of this case is as follows：
When work, the upper cover pedestal 1 drives the upper cover 12 and the first insulating support 11 to move downwardly together, institute
Stating low head pedestal 2 drives the low head 22 and the second insulating support 21 to move upwardly together, the upper cover 12 and lower envelope
First 22 jointly seal aluminum plastic film 4 on 3 side of lithium battery, at this moment, first conducting probe 61 and anode on lithium battery 3
The contact of lug 31, second conducting probe 62 is contacted with negative lug 32 on lithium battery 3 and the third conducting probe 63
It lunges in the aluminum plastic film 4 and is contacted with its aluminium layer, in this way, internal short-circuit of first Insulation Resistance Tester 71 to lithium battery 3
It is detected, that is, detects positive pole ear 31 and whether negative lug 32 is short-circuit, second Insulation Resistance Tester 72 is to lithium electricity
Whether short circuit is detected aluminium layer in pond 3 with negative lug 32, if the first Insulation Resistance Tester 71 sends out the buzzing of short circuit
Alarm, then lithium battery 3 is internal short-circuit, if second Insulation Resistance Tester 72 sends out the buzzing alarm of short circuit,
Lithium battery 3 is the short circuit of negative lug 32 and aluminium layer in aluminum plastic film 4, when finding above-mentioned unfavorable condition, is then taken after encapsulation
Go out defective products to reprocess etc., this case realizes the work(that online Insulation monitoring is carried out while lithium battery aluminum-plastic film encapsulates
Can, practicality easy to detect, can reduce encapsulation after using manually come to lithium battery 3 carry out one by one the cost of Insulation test with
The probability that erroneous judgement can be reduced is conducive to improve working efficiency.
As described above, when it is implemented, first conducting probe, 61 and second conducting probe 62 can be described first
It is moved on insulating support 11, in this way, being convenient for when it is implemented, by adjusting so that the first conducting probe 61 is opposite below just
Pole lug 31 and by the opposite negative lug 32 below of the second conducting probe 62, in order to described in when aluminum plastic film 4 encapsulates the
One conducting probe 61 can connect with the positive pole ear 31 and can be contacted with the negative lug 32 with second conducting probe 62.
As described above, when it is implemented, first insulating support 11 is equipped with horizontal guide slot 111, the level is led
There are the first needle stand 611, the second needle stand 621 and third needle stand 631 by screw connection respectively on slot 111, described first leads
Electric probe 61 is mounted on first needle stand 611, and second conducting probe 62 is mounted on second needle stand 621, institute
Third conducting probe 63 is stated on the third needle stand 631, in this way, by adjust the first needle stand 611, the second needle stand 621,
And the position of third needle stand 631 can correspond to and adjust the first conducting probe 61, the second conducting probe 62, third conducting probe 63
Position.
As described above, when it is implemented, first conducting probe 61 by 612 elastic connection of the first spring described
On one needle stand 611, second conducting probe 62 by 622 elastic connection of second spring on second needle stand 621, such as
This, when first insulating support 11 moves downward, first conducting probe 61 move downward and with the positive pole ear
31 Elastic Contacts and second conducting probe 62 move downward and with 32 Elastic Contact of the negative lug, in this way, being conducive to
Lug is not weighed wounded while ensureing contact in place.
As described above, when it is implemented, the first insulating support 11 at 111 notch of the horizontal guide slot is equipped with and institute
State 111 scale 112 disposed in parallel of horizontal guide slot, in this way, convenient for show the first conducting probe 61, the second conducting probe 62,
The graduation position of third conducting probe 63.
As described above, this case protection is a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function, one
Cutting the technical solution same or similar with this case structure all should be shown as falling into the protection domain of this case.
Claims (5)
1. a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function, it is characterised in that include upper cover pedestal
(1) and low head pedestal (2), the upper cover pedestal (1) is connected with the first insulating support (11) and downwards to side directions
To the upper cover (12) being connected with for encapsulating aluminum plastic film (4) on lithium battery (3) side, the low head pedestal (2) is to side
Direction is connected with the second insulating support (21) and upward direction is connected with for encapsulating aluminum plastic film (4) on lithium battery (3) side
Low head (22) is equipped with workbench (5) between first insulating support (11) and the second insulating support (21), described first absolutely
Edge holder (11) is equipped with the first conducting probe (61) for being contacted with positive pole ear (31) on lithium battery (3) and is used for and lithium
The second conducting probe (62) that negative lug (32) contacts on battery (3) and for being contacted with aluminium layer in aluminum plastic film (4)
Three conducting probes (63) are electrically connected with the first insulation between first conducting probe (61) and second conducting probe (62)
Resistance meter (71) is electrically connected with the second insulation resistance between second conducting probe (62) and third conducting probe (63)
Tester (72), second insulating support (21) is equipped with lunges the aluminum plastic film convenient for the third conducting probe (63)
(4) the insulation soft block (8) in be contacted with aluminium layer.
2. a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function according to claim 1, feature
It is that first conducting probe (61) and the second conducting probe (62) can move on first insulating support (11).
3. a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function according to claim 2, feature
It is that first insulating support (11) is equipped with horizontal guide slot (111), passes through spiral shell respectively on the horizontal guide slot (111)
Silk is connected with the first needle stand (611), the second needle stand (621) and third needle stand (631), the first conducting probe (61) peace
On first needle stand (611), second conducting probe (62) is mounted on second needle stand (621), and described the
Three conducting probes (63) are mounted on the third needle stand (631).
4. a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function according to claim 3, feature
Be first conducting probe (61) by the first spring (612) elastic connection on first needle stand (611), described
Two conducting probes (62) are by second spring (622) elastic connection on second needle stand (621).
5. a kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function according to claim 3, feature
It is flat with the horizontal guide slot (111) to be that the first insulating support (11) at the horizontal guide slot (111) notch is equipped with
The scale (112) of row setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652455.0A CN106025372B (en) | 2016-08-10 | 2016-08-10 | A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652455.0A CN106025372B (en) | 2016-08-10 | 2016-08-10 | A kind of lithium battery aluminum-plastic film sealing machine with online Insulation monitoring function |
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| Publication Number | Publication Date |
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| CN106025372A CN106025372A (en) | 2016-10-12 |
| CN106025372B true CN106025372B (en) | 2018-09-04 |
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| CN108226801A (en) * | 2018-01-12 | 2018-06-29 | 深圳市欧盛自动化有限公司 | Soft-package battery side short-circuit voltage test method, device and instrument |
| CN108328320B (en) * | 2018-01-26 | 2024-08-27 | 厦门市企惠知识产权有限公司 | Cell tab aluminum film short circuit detection device |
| CN109301344A (en) * | 2018-11-02 | 2019-02-01 | 中山慧能科技有限公司 | A kind of packaging and insulation testing equipment and packaging and insulation testing method of lithium battery |
| CN109581061B (en) * | 2018-12-21 | 2023-09-19 | 福建冠城瑞闽新能源科技有限公司 | A thermal pressure resistance measuring machine for battery cells |
| CN110707350B (en) * | 2019-10-18 | 2021-07-06 | 珠海冠宇电池股份有限公司 | A device for realizing cell side sealing and insulation internal resistance testing |
| CN111786007B (en) * | 2020-07-28 | 2024-05-17 | 远景动力技术(江苏)有限公司 | Soft package battery heat sealing system |
| CN116990731A (en) * | 2023-08-03 | 2023-11-03 | 中国科学院微小卫星创新研究院 | Fluxgate clamp and magnetic field measuring method |
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| CN201966293U (en) * | 2010-12-28 | 2011-09-07 | 齐秉春 | Vacuum sealing machine |
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| Publication number | Publication date |
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| CN106025372A (en) | 2016-10-12 |
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