CN112462218B - Cell pressurization tool, cell withstand voltage test device and withstand voltage test method - Google Patents
Cell pressurization tool, cell withstand voltage test device and withstand voltage test method Download PDFInfo
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- CN112462218B CN112462218B CN202011246305.2A CN202011246305A CN112462218B CN 112462218 B CN112462218 B CN 112462218B CN 202011246305 A CN202011246305 A CN 202011246305A CN 112462218 B CN112462218 B CN 112462218B
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/18—Subjecting similar articles in turn to test, e.g. go/no-go tests in mass production
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- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- 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
Abstract
The battery cell pressurizing tool, the battery cell withstand voltage testing device and the withstand voltage testing method, wherein the battery cell withstand voltage testing device comprises a battery cell pressurizing tool, and the battery cell pressurizing tool comprises: the first pressing plate and the second pressing plate are arranged oppositely, the second pressing plate is used for placing the battery cell to be tested, and the first pressing plate and the second pressing plate can move relatively, so that the first pressing plate can be pressed on the battery cell to be tested; the first pressing plate comprises at least two sub pressing plates which are adjacently arranged, the pressing position of at least one sub pressing plate in the sub pressing plates is located in the electrodeless ear area of the battery cell to be tested, and the sub pressing plates are driven by mutually independent pressing plate driving units. The cell pressurizing tool disclosed by the invention can be used for pressurizing the cell to be tested in a region, can be used for independently pressurizing the electrode lug region of the cell, can be used for pressurizing the whole cell, can be used for effectively detecting the internal defects of the cell such as diaphragm folding and the like, and can be used for improving the detection rate of defective products and ensuring the quality of a battery.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium battery cell withstand voltage short circuit test device and a lithium battery cell withstand voltage short circuit test method.
Background
As a new energy product with wider application, the lithium ion battery has higher and higher requirements on various performances, and various performance tests can be carried out before the battery leaves the factory to ensure the quality of the battery. The withstand voltage test is a safety test item before battery packaging, and the test is to apply pressure to the surface of a battery core (winding core) and detect whether the battery core has a short circuit phenomenon caused by own internal defects.
The existing voltage-withstanding short-circuit test equipment for the battery cells is to press the battery cells by using a horizontal pressing plate to press the battery cells. Besides the battery core body, the battery core structure also comprises a tab, wherein the tab is generally a foil material such as aluminum or nickel and has a certain thickness of 0.08-0.2 mm, so that the battery core can be concentrated in the position of the tab when being pressed by a pressing plate, and other positions of the battery core body are insufficiently stressed, thereby causing the phenomenon of insufficient stress between the positive electrode and the negative electrode of the battery coreThe air gap of the battery is larger, which can lead to misjudgment of a capacitance model based on a withstand voltage test and easily lead to low voltage or zero voltage of the battery cell after formation. In addition, the membrane is folded to easily cause zero voltage of the battery cell, and the membrane folding of the battery cell at the tail corner position can further increase the air gap between the positive electrode and the negative electrode, so that the voltage withstand value (the air breakdown voltage between the positive electrode and the negative electrode)
Delta in the formula is the relative density of air, d is the thickness of a uniform electric field), the voltage-withstanding test detection rate is not high, and defective products of diaphragm folding are not easy to detect.
Disclosure of Invention
The invention aims to provide a cell pressurizing tool, a cell withstand voltage testing device and a withstand voltage testing method, which can improve the defective product detection rate of a cell withstand voltage test.
In order to achieve the above object, the present invention adopts the following technical solutions:
a cell pressurization tooling, comprising: the first pressing plate and the second pressing plate are arranged oppositely, the second pressing plate is used for placing the battery cell to be tested, and the first pressing plate and the second pressing plate can move relatively, so that the first pressing plate can be pressed on the battery cell to be tested; the first pressing plate comprises at least two sub pressing plates which are adjacently arranged, the pressing position of at least one sub pressing plate in the sub pressing plates is located in the electrodeless ear area of the battery cell to be tested, and the sub pressing plates are driven by mutually independent pressing plate driving units.
According to the technical scheme, the first pressing plate is composed of the plurality of sub pressing plates, each sub pressing plate can move independently, so that the battery core to be tested can be pressurized in a region, the pressing position of at least one sub pressing plate in the sub pressing plates is located in the electrodeless lug region of the battery core to be tested, when the voltage withstand test is conducted on the battery core, the sub pressing plates can be pressed in the electrodeless lug region of the battery core first, the influence of the thickness of the electrode lug foil on the voltage withstand test is avoided, the defect of the diaphragm is detected first, the battery core with the defect is removed preferentially, then the whole voltage withstand condition of the battery core is pressurized by all the sub pressing plates, the influence of the thickness of the electrode lug on the air gap in the voltage withstand test is detected, specific detection can be conducted on the diaphragm folding position, the diaphragm folding detection rate and the detection rate of the defective products of the battery core are improved, the quality of the defective products can be guaranteed, and the defective products are prevented from flowing out.
Further, the pressing position of at least one of the sub-pressing plates is located at the side part or the bottom of the cell to be tested.
More specifically, the first pressing plate comprises a first sub-pressing plate and a second sub-pressing plate, the first sub-pressing plate is in a shape, the pressing-down position of the first sub-pressing plate is positioned at the side part of the cell to be tested, and the first sub-pressing plate and the second sub-pressing plate form a square first pressing plate; the first sub-pressing plate is driven by a first pressing plate driving unit, and the second sub-pressing plate is driven by a second pressing plate driving unit.
More specifically, the first sub-pressing plate comprises a rectangular part and right-angle parts respectively arranged at two ends of the rectangular part, the length of the rectangular part corresponds to the length of the battery cell to be tested, a right-angle side of the right-angle part is connected with the rectangular part, and the other right-angle side is flush with the end face of the rectangular part.
Preferably, the side surface of the sub-pressing plate, which is positioned in the electrodeless ear area of the battery cell to be tested and is adjacent to other sub-pressing plates, of the pressing position is provided with a lower boss part which extends outwards horizontally, the bottom surface of the lower boss part is flush with the bottom surface of the sub-pressing plate, the side surface of the other sub-pressing plate, which is positioned in the electrodeless ear area of the battery cell to be tested and is adjacent to the pressing plate of the pressing position, of the other sub-pressing plate is correspondingly provided with an upper boss part which extends outwards horizontally, and the upper boss part can be pressed on the lower boss part.
More specifically, the device further comprises a mounting plate, the pressing plate driving unit is arranged on the mounting plate, the sub pressing plates are movably connected with the mounting plate through guide posts, and through holes for the guide posts to pass through are formed in the mounting plate.
More specifically, the platen driving unit is an air cylinder.
The invention also provides a cell withstand voltage testing device, which comprises a cell pressurizing tool for pressurizing a cell to be tested and a short circuit tester electrically connected with the tab of the cell to be tested, wherein the cell pressurizing tool is the cell pressurizing tool according to any one of claims 1 to 7.
The invention also provides a voltage withstand test method for the battery cell, which adopts the voltage withstand test device for the battery cell to conduct voltage withstand test, and comprises the following steps:
step 1, placing a cell to be tested on the second pressing plate;
step 3, connecting test wiring of a short circuit tester to the positive electrode lug and the negative electrode lug of the battery cell to be tested respectively, starting the short circuit tester, applying voltage to the battery cell to be tested for withstand voltage test, comparing a test result of the short circuit tester with a preset process value, judging whether the battery cell is qualified or not, removing the battery cell which is unqualified in test, and carrying out next test on the battery cell which is qualified in test;
and 5, after the test is finished, closing the short circuit tester, resetting the sub-pressing plate, taking out the battery cells, and classifying according to qualification or disqualification.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the following description will briefly explain the embodiments or the drawings required for the description of the prior art, it being obvious that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic structural diagram of a pressurizing tool according to an embodiment of the present invention;
FIG. 2 is a front view of a pressurizing tool according to an embodiment of the present invention;
FIG. 3 is a top view of a pressurization tool according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first sub-platen according to an embodiment of the present invention pressed against a cell;
fig. 5 is a top view of a first sub-platen according to an embodiment of the present invention pressed against a cell.
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Detailed Description
In describing embodiments of the present invention in detail, the drawings showing the structure of the device are not to scale locally for ease of illustration, and the schematic illustrations are merely examples, which should not limit the scope of the invention. It should be noted that the drawings are in simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present invention.
Referring to fig. 1, 2 and 3, the electrical core testing pressurization tool of the present embodiment includes a first pressing plate 1 and a second pressing plate 2 that are disposed opposite to each other, and the first pressing plate 1 and the second pressing plate 2 can move relatively, so that the two pressing plates are close to each other or far from each other. The first pressing plate 1 of the embodiment is located above the second pressing plate 2, and is an upper pressing plate, the second pressing plate 2 is a lower pressing plate, and the to-be-tested battery cell 10 is placed on the second pressing plate 2. The first pressing plate 1 is driven by a pressing plate driving unit and can be close to the second pressing plate 2 or far away from the second pressing plate 2, so that pressure is applied to the battery cell 10 to be tested.
The first pressing plate 1 of the present invention is composed of at least two sub-pressing plates, the first pressing plate 1 of the present embodiment includes a first sub-pressing plate 1-1 and a second sub-pressing plate 1-2, the first sub-pressing plate 1-1 and the second sub-pressing plate 1-2 together form a square upper pressing plate, the first sub-pressing plate 1-1 and the second sub-pressing plate 1-2 are adjacently arranged, the projection area of the first pressing plate 1 on the second pressing plate 2 is larger than or equal to the projection area of the battery cell 10 to be tested on the second pressing plate 2 when the battery cell 10 to be tested is placed on the second pressing plate 2, so that the first sub-pressing plate 1-1 and the second sub-pressing plate 1-2 can jointly press the whole surface of the battery cell 10 to be tested. The number of the pressing plate driving units corresponds to that of the sub pressing plates, namely, each sub pressing plate is driven by an independent pressing plate driving unit and can move independently. The platen driving unit of this embodiment includes a first platen driving unit 3 that drives the first sub-platen 1-1 to move and a second platen driving unit 4 that drives the second sub-platen 1-2 to move. The sub-pressing plates are driven by different pressing plate driving units, so that the sub-pressing plates can be pressed on the surface of the cell to be tested successively (in sections). The first and second platen driving units of this embodiment each employ an air cylinder.
In the sub-pressing plates forming the first pressing plate 1, the pressing position of at least one sub-pressing plate corresponds to the area of the electrode lug of the battery core to be tested, for example, the electrode lug of the battery core is generally connected to the top of the battery core, besides the exposed part (the part exposed to the battery core), part of the electrode lug extends inside the battery core, the pressing position of one sub-pressing plate can be arranged at the side part of the battery core to be tested, for example, at the left side or the right side of the electrode lug of the battery core, the shape of the other sub-pressing plates covers other areas of the battery core to be tested, so that the area of the electrode lug of the battery core and the area of the electrode lug can be pressed separately by the sub-pressing plates, when the sub-pressing plate corresponding to the area of the electrode lug is pressed, the sub-pressing plates are completely pressed on the battery core body, so that the situation that an air gap is overlarge due to the thickness of a current collector of the electrode lug is avoided, and the battery core to be tested is pressed in a sectional way, namely, the battery core to be tested is pressed in the area of the electrode lug is integrally, defective products with diaphragm folding defects can be detected, and the folded battery core existing in advance can be removed, and the inspection efficiency is improved.
As the diaphragm is easier to fold at the corner of the battery cell, and the air gap between the positive electrode and the negative electrode of the battery cell can be further increased by the diaphragm folding at the corner, in order to improve the diaphragm folding detection rate, the first sub-pressing plate 1-1 can be in a shape of [ shape and is pressed on the side part of the battery cell body ] as a preferred embodiment of the invention. More preferably, as shown in fig. 4 and 5, the first sub-pressing plate 1-1 is composed of a rectangular portion 1-1a and two right-angle portions 1-1b, the length of the rectangular portion 1-1a corresponds to the length of the battery core to be tested, the two right-angle portions 1-1b are respectively arranged at two ends of the rectangular portion 1-1a in the length direction and are connected with the rectangular portion 1-1a into a whole, a right-angle edge of the right-angle portion 1-1b is connected with the rectangular portion 1-1a, and the other right-angle edge is flush with the end face of the rectangular portion 1-1a, so that when the first sub-pressing plate 1-1 is pressed on the battery core to be tested, the first sub-pressing plate can be pressed on the corner of the battery core to be tested, and whether the diaphragm is folded at the corner is easy to detect.
In order to ensure that the sub-pressing plates are combined together to synchronously press the battery cell to be tested, a stepped matching structure is adopted between the sub-pressing plates, as in the embodiment, the adjacent side surfaces of the first sub-pressing plate 1-1 and the second sub-pressing plate 1-2 are provided with lower boss parts 1-1c which extend outwards horizontally, the bottom surfaces of the lower boss parts 1-1c are flush with the bottom surfaces of the first sub-pressing plate 1-1, correspondingly, the adjacent side surfaces of the second sub-pressing plate 1-2 and the first sub-pressing plate 1-1 are provided with upper boss parts 1-2a (figure 2) which extend outwards horizontally, when the first sub-pressing plate 1-1 and the second sub-pressing plate 1-2 are combined together, the upper boss parts 1-2a are pressed on the lower boss parts 1-1c, and the two sub-pressing plates are mutually matched to form a complete upper pressing plate, and can synchronously move and press. More specifically, the pressurizing tool of this embodiment further includes a mounting plate 5, the first platen driving unit 3 and the second platen driving unit are both disposed on the mounting plate 5, the first sub-platen 1-1 and the second sub-platen 1-2 are movably connected with the mounting plate 5 through the guide post 6, the mounting plate 5 is processed with a through hole through which the guide post 6 passes, and the guide post and the through hole cooperate to play a role in guiding, so that when the first sub-platen 1-1 and the second sub-platen 1-2 move, the first sub-platen 1-1 and the second sub-platen 1-2 are subject to the limiting effect of the guide post 6 and the through hole on the mounting plate, and the verticality and parallelism of the movement of the sub-platen can be ensured.
When the voltage withstand test is performed, the pressure of each section applied by the pressing plate to the winding core can be known according to the formula f=p×s by controlling the pressure of the pressing plate driving units of different sub pressing plates, and then the voltage withstand test assembly of the battery core is formed by matching with the short circuit tester to perform the voltage withstand test on the battery core. During voltage withstanding test, the test voltage is greater than the air breakdown voltage U between the positive electrode and the negative electrode of the battery cell b Can detect bad products when the test voltage is smaller than U b The battery core can not have the defect of diaphragm folding, but the invention can avoid the strip-shaped metal current collector (tab) of the battery core by pressurizing the battery core in a sectional manner, namely pressurizing the battery core in a sectional area, and pressurizing the diaphragm folding position, thereby reducing the size of d,thereby improving the detection rate of diaphragm folding under the process set voltage.
The voltage withstanding test method of the present invention is described below, and the voltage withstanding test assembly includes a cell pressurization tool and a short circuit tester (not shown), wherein the short circuit tester may be a short circuit tester with a model of daily ST5520 or YD9820A, and the test steps are as follows:
step 1, placing a cell to be tested on a second pressing plate 2, wherein the first pressing plate 1 is positioned above the cell to be tested;
step 3, connecting test wiring of a short circuit tester to the positive electrode lug 11 and the negative electrode lug 12 of the battery cell to be tested respectively, starting the short circuit tester, applying voltage to the battery cell to be tested for withstand voltage test, comparing a test result of the short circuit tester with a preset process value, and judging whether the battery cell is qualified or not; when the first sub-pressing plate 1-1 is pressed on the battery cell 10 to be tested, whether the battery cell has the defect of diaphragm folding or not can be detected, if the battery cell has the defect that the diaphragm folding, the short circuit condition possibly occurs in the battery cell, the pressing position of the first sub-pressing plate 1-1 avoids the area where the tab foil is positioned, the pressure is applied on the battery cell body, the short circuit phenomenon caused by the diaphragm folding can be effectively detected, if the battery cell detected in the step is unqualified, the battery cell can be removed in advance, and the subsequent integral voltage withstand test of the battery cell is not needed to be continued;
and 5, after the test is finished, closing the short circuit tester, and respectively driving the first pressing plate driving unit 3 and the second pressing plate driving unit 4 to reset the first sub pressing plate 1-1 and the second sub pressing plate 1-2, taking out the battery cell manually or by a mechanical arm, and classifying according to qualification or disqualification.
The invention improves the upper pressing plate of the pressurizing tool to be composed of at least two sub pressing plates, each sub pressing plate is driven by an independent pressing plate driving unit, the aim of regional pressurizing can be realized, the defect that the diaphragm is folded can be detected by pressurizing the non-lug area of the battery core through the sub pressing plates, the whole plate is composed of the sub pressing plates to integrally pressurize the battery core, the pressure-resistant condition of the whole battery core can be detected, the detection rate of defective products is effectively improved, and the quality of the battery is ensured.
Of course, the technical concept of the present invention is not limited to the above embodiment, and many different specific schemes can be obtained according to the concept of the present invention, for example, the first pressing plate is formed by two sub pressing plates, but in other embodiments, the number of the sub pressing plates is not limited to two, and more than two sub pressing plates can be used, and the shape of the sub pressing plates can also be changed, for example, the sub pressing plates can be formed by two rectangular plates or three rectangular plates, so long as the sub pressing plates can jointly form a large pressing plate corresponding to the size of the battery core, and the sub pressing plates can be pressed at the side part of the battery in the left-right direction, and also can be pressed at the tail part of the battery and other areas avoiding the electrode lugs; the pressing plate driving unit can use a cylinder, a motor, a hydraulic cylinder, an electric cylinder and other conventional driving units; in addition to the first platen being movable, the second platen may also be moved by the driving unit; such modifications and equivalents are intended to be included within the scope of the present invention.
Claims (9)
1. A cell pressurization tooling, comprising: the first pressing plate and the second pressing plate are arranged oppositely, the second pressing plate is used for placing the battery cell to be tested, and the first pressing plate and the second pressing plate can move relatively, so that the first pressing plate can be pressed on the battery cell to be tested;
the method is characterized in that:
the first pressing plate comprises at least two adjacent sub pressing plates, the pressing position of at least one sub pressing plate in the sub pressing plates is located in an electrodeless ear area of the battery cell to be tested, the sub pressing plates are driven by mutually independent pressing plate driving units, the side face, adjacent to other sub pressing plates, of the sub pressing plate of the electrodeless ear area of the battery cell to be tested is provided with a lower boss part extending horizontally outwards, the bottom face of the lower boss part is flush with the bottom face of the sub pressing plate, the side face, adjacent to the sub pressing plate of the electrodeless ear area of the battery cell to be tested, of the other sub pressing plates is correspondingly provided with an upper boss part extending horizontally outwards, and the upper boss part can be pressed on the lower boss part.
2. The cell pressurization tooling of claim 1, wherein: the pressing position of at least one of the sub-pressing plates is positioned at the side part or the bottom of the cell to be tested.
3. The cell pressurization tooling of claim 1, wherein: the first pressing plate comprises a first sub-pressing plate and a second sub-pressing plate, the first sub-pressing plate is in a shape of a [ shape ], the pressing-down position of the first sub-pressing plate is located at the side part of the cell to be tested, and the first sub-pressing plate and the second sub-pressing plate form a square first pressing plate;
the first sub-pressing plate is driven by a first pressing plate driving unit, and the second sub-pressing plate is driven by a second pressing plate driving unit.
4. The cell pressurization tooling of claim 3, wherein: the first sub-pressing plate comprises a rectangular part and right-angle parts respectively arranged at two ends of the rectangular part, the length of the rectangular part corresponds to the length of the battery cell to be tested, a right-angle side of the right-angle part is connected with the rectangular part, and the other right-angle side is flush with the end face of the rectangular part.
5. The cell pressurization tooling of claim 1, wherein: the pressing plate driving unit is arranged on the mounting plate, the sub pressing plates are movably connected with the mounting plate through guide posts, and through holes for the guide posts to pass through are formed in the mounting plate.
6. The cell pressurization tooling of claim 1, wherein: the pressing plate driving unit is an air cylinder.
7. The utility model provides a withstand voltage testing arrangement of electric core, includes the electric core pressurization frock that is used for to the electric core pressurization that awaits measuring to and the short circuit tester who is connected with the utmost point ear electricity of electric core that awaits measuring, its characterized in that: the cell pressurization tool is the cell pressurization tool according to any one of claims 1 to 6.
8. The utility model provides a withstand voltage test method of electric core, uses electric core pressurization frock and short circuit tester to test the electric core that awaits measuring, electric core pressurization frock includes first clamp plate and the second clamp plate of relative setting, first clamp plate with the second clamp plate can relative movement, thereby pressurizes the electric core that awaits measuring of placing on the second clamp plate, its characterized in that:
the first pressing plate consists of at least two adjacent sub pressing plates, the sub pressing plates can move independently and press the battery core to be tested, the pressing position of at least one sub pressing plate in the sub pressing plates is located in the electrodeless ear area of the battery core to be tested, the side surface of the sub pressing plate, adjacent to other sub pressing plates, of the electrodeless ear area of the battery core to be tested is provided with a lower boss part extending horizontally outwards, the bottom surface of the lower boss part is level with the bottom surface of the sub pressing plate, the side surface, adjacent to the sub pressing plate, of the other sub pressing plates, of the sub pressing plate, the pressing position of the sub pressing plate is located in the electrodeless ear area of the battery core to be tested is correspondingly provided with an upper boss part extending horizontally outwards, and the upper boss part can press the lower boss part;
the pressure resistance test comprises the following steps:
step 1, placing a cell to be tested on the second pressing plate;
step 2, pressing a sub-pressing plate on the electrode lug-free area of the battery cell to be tested;
step 3, connecting test wiring of a short circuit tester to the positive electrode lug and the negative electrode lug of the battery cell to be tested respectively, starting the short circuit tester, applying voltage to the battery cell to be tested for withstand voltage test, comparing a test result of the short circuit tester with a preset process value, judging whether the battery cell is qualified or not, removing the battery cell which is unqualified in test, and carrying out next test on the battery cell which is qualified in test;
step 4, enabling all the sub-pressing plates to be pressed on the surface of the battery cell to be tested together, applying voltage to the battery cell to be tested by the short circuit tester to perform withstand voltage test, comparing the test result of the short circuit tester with a preset process value, and judging whether the battery cell is qualified or not;
and 5, after the test is finished, closing the short circuit tester, resetting the sub-pressing plate, taking out the battery cells, and classifying according to qualification or disqualification.
9. The method for testing the withstand voltage of the battery cell according to claim 8, wherein: the first pressing plate is square, the sub-pressing plate comprises a sub-pressing plate in a shape of [ the shape ], the pressing-down position of the sub-pressing plate is located at the side part of the battery cell to be tested, and in the step 2, the [ the shape of the sub-pressing plate is pressed in the electrodeless ear area of the battery cell to be tested.
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| CN202011246305.2A CN112462218B (en) | 2020-11-10 | 2020-11-10 | Cell pressurization tool, cell withstand voltage test device and withstand voltage test method |
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| CN202011246305.2A CN112462218B (en) | 2020-11-10 | 2020-11-10 | Cell pressurization tool, cell withstand voltage test device and withstand voltage test method |
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