CN111308214A - Lithium battery electrode plate welding resistance testing device and method - Google Patents
Lithium battery electrode plate welding resistance testing device and method Download PDFInfo
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- CN111308214A CN111308214A CN202010231275.1A CN202010231275A CN111308214A CN 111308214 A CN111308214 A CN 111308214A CN 202010231275 A CN202010231275 A CN 202010231275A CN 111308214 A CN111308214 A CN 111308214A
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- power supply
- electrode
- air cylinder
- test
- plate
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- 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
- G01R27/08—Measuring resistance by measuring both voltage and current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
Abstract
The invention discloses a device and a method for testing welding resistance of electrode plates of lithium batteries.A cylinder is connected with a cylinder fixing bracket through screws, the top of a cylinder rod of the cylinder is provided with a first fixing ring, the first fixing ring is connected with a connecting cylinder plate through screws, and the connecting cylinder plate is connected with an insulating plate through connecting cylinder screws; the insulation board is provided with a power electrode and a measuring electrode, the second fixing ring is locked on the power electrode through a screw, and the second fixing ring is fixed with the insulation board through a screw; the third fixing ring is locked on the measuring electrode through a screw and fixed with the second telescopic structural part through a screw, four round holes for penetrating the guide rod are formed in the periphery of the first telescopic structural part and the periphery of the second telescopic structural part, two sides of the guide rod are locked through nuts, and a round groove for placing the spring is formed in the middle of the inner portion of the first telescopic structural part and the inner portion of the second telescopic structural part.
Description
Technical Field
The invention relates to test equipment, in particular to equipment and a method for testing welding resistance of electrode plates of lithium batteries.
Background
A lithium battery module is formed by connecting a plurality of single lithium batteries in series and in parallel. When the lithium battery electrode plates are connected in series and parallel, the lithium battery electrode plates are welded together in a welding mode, and the welding quality directly influences the performance and the service life of the battery module, so that the lithium battery electrode plates become important consideration factors for quality control of the lithium battery module. The invention develops a device to accurately measure the resistance value of the welding resistance of the electrode plate of the lithium battery so as to judge the quality of the welding of the electrode plate of the lithium battery.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the equipment and the method for testing the welding resistance of the electrode plate of the lithium battery, which have the advantages of reasonable structural design, high testing efficiency and high accuracy of a test result, liberate both hands of personnel, improve the test rhythm, automatically store and process test data, and facilitate the data retrieval and lookup of technical personnel.
In order to achieve the purpose, the invention is realized by the following technical scheme: a lithium battery electrode plate welding resistance testing device comprises a main body structure and a testing tool, wherein the main body structure is provided with the testing tool; the main body structure comprises an equipment frame, a display, an industrial personal computer, a first direct current power supply, a second direct current power supply, a Frequus horse wheel, a voltmeter, a cylinder, a lithium battery, a test starting button, an electric cabinet, a fluorescent lamp, a fault indicator lamp, a power switch, an emergency stop button, an insulating plate, a power electrode, a measuring electrode, a bakelite plate fixing block, a first electrode plate, a second electrode plate, a cylinder fixing support, an operation table top and a back plate, wherein the industrial personal computer, the first direct current power supply and the second direct current power supply are inserted into the left lower part of the equipment frame from the front side and are fixed on the equipment frame through screws; the air cylinder is connected with the air cylinder fixing support through screws, the air cylinder fixing support is fixed on the working table top through screws, the working table top is connected with the equipment frame through screws, two mounting holes for mounting a test starting button are formed in the side face of the working table top, a groove for mounting a lithium battery is formed in the working table top, and a threaded hole for mounting a proximity switch is formed in the bottom of the groove; the electric cabinet is installed in the right side below of equipment frame, and the electric cabinet passes through screwed connection with equipment frame, and the fluorescent lamp that is used for the illumination is installed through the screw at equipment frame top.
Preferably, the test tool comprises a cylinder, a cylinder fixing support, an insulating plate, a power electrode, a measuring electrode, a first telescopic structural part, a second telescopic structural part and a spring, wherein the cylinder is connected with the cylinder fixing support through screws, a first fixing ring is arranged at the top of a cylinder rod of the cylinder, the first fixing ring is connected with a connecting cylinder plate through screws, and the connecting cylinder plate is connected with the insulating plate through connecting cylinder screws; the insulation board is provided with a power electrode and a measuring electrode, the second fixing ring is locked on the power electrode through a screw, and the second fixing ring is fixed with the insulation board through a screw; the third fixing ring is locked on the measuring electrode through a screw, the third fixing ring is fixed with the second telescopic structural part through a screw, four round holes for penetrating through guide rods are formed in the peripheries of the first telescopic structural part and the second telescopic structural part, two sides of each guide rod are locked through nuts, and a round groove is formed in the middle of the inner parts of the first telescopic structural part and the second telescopic structural part and used for placing a spring; the first telescopic structural part and the insulating plate are fixedly connected through a measuring electrode connecting screw; when the power supply electrode and the measuring electrode are pushed to the first electrode plate and the second electrode plate through the cylinder, a bakelite plate fixing block is arranged on the back of the pushed electrode plate and serves as a bearing point of force, and the bakelite plate fixing block is fixed with the working table top through screws.
Preferably, the first telescopic structural member, the second telescopic structural member, the spring and the guide rod are combined into a telescopic component which can have a certain telescopic amount.
Preferably, the measured piece on the working table is placed in the groove.
Preferably, the lithium battery is provided with a positive electrode and a negative electrode, two electrode plates are welded on each electrode, the positive electrode and the negative electrode can be simultaneously measured by the device, and the measuring efficiency is doubled.
The invention has the beneficial effects that:
1. the testing tool has a telescopic structure, so that the situation that only one electrode plate is contacted or the contact is not tight due to the fact that the power electrode and the measuring electrode are different in height under the pressing mode is avoided, and the final testing result is inaccurate.
2. Through the measured piece placing groove on the working table surface, the situation that the measured piece is placed at different positions at each time to cause errors in measurement can be prevented
3. At present, the resistance testing instrument in the market is only a simple resistance test and is a handheld detection rod test, so that the measuring points are not repeatable at each time, the measured resistance is inconsistent, the equipment is based on various tool structures, the measuring points are all on the same point at each time, and the measuring intervals are consistent at each time, so that the problem that the resistance is not repeatable due to manual handheld can be avoided.
4. The existing resistance testing instrument in the market only adopts a direct measurement method for pure resistance testing, so that the measured result cannot truly reflect the resistance of a welding seam, a four-lead method testing mode is introduced into the equipment, the whole test is completed through two power supply electrodes and two measuring electrodes, and the resistance on the welding seam can be directly reflected.
5. The equipment integration level is high, and full automatic testing has liberated personnel's both hands, has promoted the beat of test, and test data is automatic to be preserved and is handled simultaneously, has made things convenient for technical staff's data to transfer and has looked up.
6. The double-electrode simultaneous measurement, every lithium cell all have positive negative pole, all have two electrode slice welding to form on every electrode, and equipment can be simultaneously to positive negative two electrode simultaneous measurement, and the efficiency of measurement improves one time.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a test fixture of the present invention;
FIG. 3 is an electrical schematic of the measurement of the present invention;
FIG. 4 is a schematic diagram of data acquisition according to the present invention;
FIG. 5 is a flow chart of the system operation of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 5, the following technical solutions are adopted in the present embodiment: a lithium battery electrode plate welding resistance testing device comprises a main body structure and a testing tool, wherein the main body structure is provided with the testing tool; the main body structure comprises an equipment frame 1, a display 2, an industrial personal computer 3, a first direct current power supply 4, a second direct current power supply 5, a Fuma wheel 6, a nano-volt meter 7, a cylinder 8, a lithium battery 9, a test starting button 10, an electric cabinet 11, a fluorescent lamp 12, a fault indicator lamp 13, an energizing switch 14, an emergency stop button 15, an insulating plate 16, a power electrode 17, a measuring electrode 18, a bakelite plate fixing block 19, a first electrode plate 20, a second electrode plate 21, a cylinder fixing support 29, an operation table top 30 and a back plate 31, wherein the industrial personal computer 3, the first direct current power supply 4 and the second direct current power supply 5 are inserted into the left lower part of the equipment frame 1 from the front side and fixed on the equipment frame 1 through screws, the back plate 31 is fixedly connected with the equipment frame 1 through screws, the back plate 31 is provided with equipment mounting holes, the display 2, the nano-volt meter 7, the fault indicator lamp 13, the energizing switch 14 and the emergency stop button 15, and is fixed on the back plate 31 by screws; the air cylinder 8 is connected with an air cylinder fixing support 29 through screws, the air cylinder fixing support 29 is fixed on a working table 30 through screws, the working table 30 is connected with the equipment frame 1 through screws, two mounting holes for mounting the test starting button 10 are formed in the side face of the working table 30, a groove for mounting the lithium battery 9 is formed in the working table 30, and a threaded hole for mounting the proximity switch is formed in the bottom of the groove; the electric cabinet 11 is installed in the lower right side of the equipment frame 1, the electric cabinet 11 is connected with the equipment frame 1 through screws, and the fluorescent lamp 12 used for lighting is installed on the top of the equipment frame through screws.
The testing tool comprises a cylinder 8, a cylinder fixing support 29, an insulating plate 16, a power electrode 17, a measuring electrode 18, a first telescopic structural part 25, a second telescopic structural part 28 and a spring assembly 27, wherein the cylinder 8 is connected with the cylinder fixing support 29 through screws, a first fixing ring 32 is arranged at the top of a cylinder rod of the cylinder 8, the first fixing ring 32 is connected with a connecting cylinder plate 23 through screws, and the connecting cylinder plate 23 is connected with the insulating plate 16 through connecting cylinder screws 22; the insulating plate 16 is provided with a power supply electrode 17 and a measuring electrode 18, the second fixing ring 33 is locked on the power supply electrode 17 through a screw, and the second fixing ring 33 is fixed with the insulating plate 16 through a screw; the third fixing ring 34 is locked on the measuring electrode 18 through a screw, the third fixing ring 34 is fixed with the second telescopic structural part 28 through a screw, four round holes for penetrating through guide rods are formed in the peripheries of the first telescopic structural part 25 and the second telescopic structural part 28, two sides of each guide rod 26 are locked through nuts, and a round groove for placing the spring 27 is formed in the middle of the inner parts of the first telescopic structural part 25 and the second telescopic structural part 28; the first telescopic structural part 25 is fixedly connected with the insulating plate 16 through a connecting measuring electrode screw 24; when the power supply electrode 17 and the measuring electrode 18 are pushed to the first electrode plate 20 and the second electrode plate 21 through the cylinder, a bakelite plate fixing block 19 is arranged on the back of the pushed electrode plates and is used as a force bearing point, and the bakelite plate fixing block is fixed with a working table 30 through screws.
It should be noted that the first telescopic structure 25, the second telescopic structure 28, the spring 27 and the guide rod 26 are combined into a telescopic component capable of extending and retracting a certain amount.
It is noted that the measured object on the working table 30 is placed in the groove.
In addition, the lithium battery 9 is provided with a positive electrode and a negative electrode, two electrode plates are welded on each electrode, the positive electrode and the negative electrode can be simultaneously measured by the device, and the measuring efficiency is doubled.
The method for testing the welding resistance of the electrode plate of the lithium battery in the embodiment comprises the following steps:
1. after a power switch on a back panel is turned on, the computer, the display, the electric cabinet, a direct current power supply, a voltmeter and a fluorescent lamp are powered on, the air cylinder retracts to the top to wait, test software on the computer is turned on, after the software is entered, a power output step length and a qualified interval range of resistance are set, the lithium battery is placed in a groove on the table board, a limit switch in the groove can judge whether the lithium battery is placed in place, if the lithium battery is not placed in place on a software interface, incorrect information can be popped out when the lithium battery is placed in place, the lithium battery needs to be placed in again, after the lithium battery is placed in place, a green light of a test starting button can flicker to indicate that.
2. The test starting button is of a double-button structure, an operator needs to press both hands simultaneously and keeps pressing down the air cylinder, after the air cylinder is pressed down, if the air cylinder is not pressed down for a period of time, the air cylinder automatically retracts to the top to wait, a fault lamp on the back plate can be lightened, meanwhile, information for prompting the air cylinder to descend abnormally is arranged on software, and at the moment, the operator needs to troubleshoot the fault problem. Otherwise, after the lower limit is in place, the green light of the test starting button is in a long-bright state at this time, the operator can release both hands, the power supply is switched on, and the system enters into automatic power supply application for testing.
3. In the test process, the first direct current power supply and the second direct current power supply can perform increasing output according to the power supply output step length set before the test, the power supply is maintained for 5 seconds when outputting to 10A, then the increasing output is continuously performed according to the set power supply output step length, the power supply is maintained for 5 seconds when outputting to 20A, and then the power supply is reduced and output according to the fixed step length until the output is 0A, and the power supply is disconnected. In the whole power supply application process, the system can record the current output current of the power supply and the voltage value measured by the current nanovolt meter at intervals of 1 second.
4. After the whole power supply application process is finished, the system can automatically calculate a resistance value of each point according to recorded data, then provides the minimum value and the maximum value of a resistance, compares the minimum value and the maximum value with the set qualified interval range of the resistance, and if the resistance is qualified, the cylinder retracts to the top, and the test is finished. If the test result is not qualified, whether the test is repeated or not can be popped up on the software interface, if the test result is yes, the system repeats the test process, and if the test result is not yes, the air cylinder retracts to the top, and the fault indicator lamp is lightened.
In the method for testing the weld resistance by the four-lead method in the specific embodiment, a whole testing method is completed by two power supply electrodes and two measuring electrodes; the tool structure of the measuring electrode adopts a telescopic structure, so that the problem that the power supply electrode and the measuring electrode are not at the same height can be avoided; the mode of simultaneous measurement of the two electrodes can be used for simultaneously measuring the anode and the cathode of the lithium battery.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A lithium battery electrode plate welding resistance test device is characterized by comprising a main body structure and a test tool, wherein the main body structure is provided with the test tool; the main body structure comprises an equipment frame (1), a display (2), an industrial personal computer (3), a first direct current power supply (4), a second direct current power supply (5), a Frouhorse wheel (6), a voltmeter (7), an air cylinder (8), a lithium battery (9), a test starting button (10), an electric cabinet (11), a fluorescent lamp (12), a fault indicator lamp (13), a power switch (14), an emergency stop button (15), an insulating plate (16), a power electrode 17, a measuring electrode (18), a bakelite plate fixing block (19), a first electrode plate (20), a second electrode plate (21), an air cylinder fixing bracket (29), an operation table board (30) and a back plate (31), wherein the industrial personal computer (3), the first direct current power supply (4) and the second direct current power supply (5) are inserted into the left lower part of the equipment frame (1) from the front side and fixed on the equipment frame (1) through screws, the back plate (31) is fixedly connected with the equipment frame (1) through screws, the back plate (31) is provided with an equipment mounting hole, and the display (2), the voltmeter (7), the fault indicator lamp (13), the power-on switch (14) and the emergency stop button (15) are inserted into the back plate (31) from the front side and are fixed on the back plate (31) through screws; the air cylinder (8) is connected with an air cylinder fixing support (29) through screws, the air cylinder fixing support (29) is fixed on a working table top (30) through screws, the working table top (30) is connected with the equipment frame (1) through screws, two mounting holes for mounting the test starting button (10) are formed in the side face of the working table top (30), a groove for mounting the lithium battery (9) is formed in the working table top (30), and a threaded hole for mounting the proximity switch is formed in the bottom of the groove; the electric cabinet (11) is installed at the right lower side of the equipment frame (1), the electric cabinet (11) is connected with the equipment frame (1) through screws, and the fluorescent lamp (12) used for illumination is installed at the top of the equipment frame through screws.
2. The welding resistance test equipment for the electrode plates of the lithium batteries according to claim 1, wherein the test tool comprises an air cylinder (8), an air cylinder fixing support (29), an insulation plate (16), a power electrode (17), a measuring electrode (18), a first telescopic structural part (25), a second telescopic structural part (28) and a spring assembly (27), the air cylinder (8) is connected with the air cylinder fixing support (29) through screws, a first fixing ring (32) is arranged at the top of an air cylinder rod of the air cylinder (8), the first fixing ring (32) is connected with a connecting air cylinder plate (23) through screws, and the connecting air cylinder plate (23) is connected with the insulation plate (16) through a connecting air cylinder screw (22); a power supply electrode (17) and a measuring electrode (18) are mounted on the insulating plate (16), a second fixing ring (33) is locked on the power supply electrode (17) through a screw, and the second fixing ring (33) is fixed with the insulating plate (16) through the screw; the third fixing ring (34) is locked on the measuring electrode (18) through a screw, the third fixing ring (34) is fixed with the second telescopic structural part (28) through a screw, four round holes for penetrating guide rods are formed in the peripheries of the first telescopic structural part (25) and the second telescopic structural part (28), two sides of each guide rod (26) are locked through nuts, a round groove for placing a spring (27) is formed in the middle of the inner parts of the first telescopic structural part (25) and the second telescopic structural part (28), and the first telescopic structural part (25) and the insulating plate (16) are connected and fixed through a measuring electrode connecting screw (24); when the power supply electrode (17) and the measuring electrode (18) are pushed to the first electrode plate (20) and the second electrode plate (21) through the cylinder, a bakelite plate fixing block (19) is arranged on the back of the pushed electrode plates and serves as a force bearing point, and the bakelite plate fixing block is fixed with a working table top (30) through screws.
3. The welding resistance test equipment for the electrode plates of the lithium batteries according to claim 1, wherein the first telescopic structural member (25), the second telescopic structural member (28), the spring (27) and the guide rod (26) are combined into a telescopic component.
4. The welding resistance test equipment for the electrode plates of the lithium batteries as claimed in claim 1, wherein the tested piece placing groove on the working table (30) is provided.
5. The welding resistance test device and method for the electrode plates of the lithium battery as claimed in claim 1, wherein the lithium battery (9) is provided with positive and negative electrodes, and two electrode plates are welded on each electrode.
6. A method for testing welding resistance of electrode plates of lithium batteries is characterized by comprising the following steps:
(1) after a power switch on a back panel is turned on, a computer, a display, an electric cabinet, a first direct current power supply, a second direct current power supply, a nano-volt meter and a fluorescent lamp are electrified, an air cylinder retracts to the top to wait, test software on the computer is turned on, after the test software enters the software, the output step length of the power supply and the qualified interval range of resistance are set, a lithium battery is placed in a groove on a table board, a limit switch in the groove can judge whether the lithium battery is placed in place, if the lithium battery is not placed in place on a software interface, incorrect information can be popped out, the lithium battery needs to be placed again at this time, and after the lithium battery is placed in place, a green light of a test starting button can flash;
(2) the test starting button is of a double-button structure, an operator needs to press both hands simultaneously and keep the air cylinder to be pressed down, after the air cylinder is pressed down, if the air cylinder cannot reach a lower limiting position for a period of time after being pressed down, the air cylinder automatically retracts to the top to wait, a fault lamp on the back plate can be lightened, information for prompting the abnormal descending of the air cylinder is provided on software, and the operator needs to troubleshoot fault problems; otherwise, after the lower limit is in place, the green light of the test starting button is in a long-bright state at this time, the operator can release both hands and switch on the power supply, and the system enters into automatic power supply application for testing;
(3) in the testing process, the first direct current power supply and the second direct current power supply can perform increasing output according to a power supply output step length set before testing, the power supply keeps for 5 seconds when outputting to 10A, then continues increasing output according to the set power supply output step length, keeps for 5 seconds when outputting to 20A, and then reduces output according to a fixed step length until the output is 0A, and then the power supply is disconnected; in the whole power supply application process, the system records the current output current of the power supply and the voltage value measured by the current nanovolt meter at intervals of 1 second;
(4) after the whole power supply application process is finished, the system can automatically calculate a resistance value of each point according to recorded data, then provides a minimum value and a maximum value of a resistance, and compares the minimum value and the maximum value with a set resistance qualified interval range, if the resistance is qualified, the cylinder retracts to the top, and the test is finished; if the test result is not qualified, whether the test is repeated or not can be popped up on the software interface, if the test result is yes, the system repeats the test process, and if the test result is not yes, the air cylinder retracts to the top, and the fault indicator lamp is lightened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010231275.1A CN111308214A (en) | 2020-03-27 | 2020-03-27 | Lithium battery electrode plate welding resistance testing device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010231275.1A CN111308214A (en) | 2020-03-27 | 2020-03-27 | Lithium battery electrode plate welding resistance testing device and method |
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| CN111308214A true CN111308214A (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112643321A (en) * | 2020-11-27 | 2021-04-13 | 深圳市欣旺达综合能源服务有限公司 | Intelligent electric screwdriver device and control method thereof |
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2020
- 2020-03-27 CN CN202010231275.1A patent/CN111308214A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112643321A (en) * | 2020-11-27 | 2021-04-13 | 深圳市欣旺达综合能源服务有限公司 | Intelligent electric screwdriver device and control method thereof |
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