CN108037467A - A kind of battery core voltage sample piece welding quality detection method and detection device - Google Patents
A kind of battery core voltage sample piece welding quality detection method and detection device Download PDFInfo
- Publication number
- CN108037467A CN108037467A CN201711448052.5A CN201711448052A CN108037467A CN 108037467 A CN108037467 A CN 108037467A CN 201711448052 A CN201711448052 A CN 201711448052A CN 108037467 A CN108037467 A CN 108037467A
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- test
- welding quality
- welding
- battery core
- pressure fall
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- 238000003466 welding Methods 0.000 title claims abstract description 79
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000007423 decrease Effects 0.000 claims abstract description 8
- 239000000523 sample Substances 0.000 claims description 29
- 238000012956 testing procedure Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 239000010949 copper Substances 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to a kind of battery core voltage sample piece welding quality detection method and detection device, the detection method includes：Whether pressure fall-off test step, meet setting condition using the voltage drop at the welding region of pressure decline method test measurand；Overall merit step, the result obtained according to pressure fall-off test step obtain final welding quality.The pressure fall-off test step is specially：101) DC source is passed through between welding region and cell polar ear, and controls the DC source to stablize output；102) voltage drop between welding region and cell polar ear is measured, judges whether the voltage drop meets setting condition, if so, then exiting, if it is not, then producing warning message.Compared with prior art, the present invention have can effectively welding quality evaluated, reduce battery modules generation thermal runaway risk the advantages that.
Description
Technical field
The present invention relates to battery modules technical field, more particularly, to a kind of battery core voltage sample piece Welding quality test side
Method and detection device.
Background technology
After present ev industry grows up, more and more Vehicular battery module technologies are generated.Battery mould
Group is mainly made of battery core.The voltage needs of battery core are monitored, so the voltage sample in each battery core must as one kind
The measure of palpus.Now with a variety of different battery core voltage sample modes：
1st, using harness as voltage sample line, harness is adopted voltage one end and is connected to using ultrasonic bonding with battery core aluminium (copper) bar
Together.
2nd, using aluminium bars as voltage sample line, harness is adopted voltage one end and is connected to using ultrasonic bonding with battery core aluminium (copper) bar
Together.
3rd, using copper sheet and flexible circuit board as voltage sample line, harness adopts voltage one end and uses laser welding and cell polar ear
Connect together.
Wherein harness makees sampling line, can introduce the inconsistency and uncertainty of hand assembled, and during processing, reducing quality can
By property.And by the way of ultrasonic bonding, the complexity (needing to dispense, then integrate processing) of technique can be increased, increasing is set
The difficulty of meter (thickness, which increases, causes assembling difficulty).
In the 3rd kind of mode of the above, since laser welding is there are unstability (thermal lensing effect etc.), it sometimes appear that empty
Weldering, causes voltage sample to fail.Rosin joint occur after, visual inspection can not effectively investigate out rosin joint failure, there are the defects of be：Electricity
The laser welding failure of pressure sampled point can not effectively be found.
Prior art means can not detect welding quality on the premise of non-destructive, the physical property such as including weld strength
With the chemical property such as conductive resistance rate.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of battery core voltage sample
Piece welding quality detection method and detection device.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of battery core voltage sample piece welding quality detection method, including：
Whether pressure fall-off test step, meet setting bar using the voltage drop at the welding region of pressure decline method test measurand
Part；
Overall merit step, the result obtained according to pressure fall-off test step obtain final welding quality.
Further, the pressure fall-off test step is specially：
101) DC source is passed through between welding region and cell polar ear, and controls the DC source to stablize output；
102) voltage drop between welding region and cell polar ear is measured, judges whether the voltage drop meets setting condition,
If so, then exit, if it is not, then producing warning message.
Further, in the step 101), stablizing for the DC source is automatically adjusted by electronic load and is exported.
Further, described impose a condition is 0.1mV<U<0.55mV, wherein, U is the voltage drop measured.
Further, which further includes：
Pulling capacity testing procedure, measures the welding pulling capacity to measurand, and the knot obtained by pulling capacity testing procedure
Fruit verifies the validity of pressure fall-off test.
It is a kind of realize described in battery core voltage sample piece welding quality detection method detection device, including：
Pressure fall-off test module, for measuring the voltage drop at the welding region；
Driving mechanism, for driving measurand to be moved to test position；
Detection platform, the pressure fall-off test module and driving mechanism are arranged in the detection platform；
Control module, connects the pressure fall-off test module and driving mechanism respectively, is surveyed for sending driving instruction and receiving
Data are tried, and final welding quality is obtained according to test data.
Further, the pressure fall-off test module includes：
DC source, is connected with the welding region of measurand, for producing stable output；
Voltage detecting table, is connected by probe and the welding region of measurand, and link control module, for measuring
State the voltage drop at welding region.
Further, the pressure fall-off test module further includes：
Electronic load, is connected with control module, and is connected between the DC source and welding region, in control mould
That DC source is realized under the control instruction of block stablizes output.
Further, which further includes pulling capacity test module, and it is strong that the pulling capacity test module includes band
It is worth the pulling capacity test machine of sensor, the force value sensor is connected with control module.
Further, the driving mechanism includes servomotor and the execution cylinder being connected.
Further, the control module includes monitoring host computer, which is also associated with alarm.
Compared with prior art, the present invention carries out electricity in automatic battery assembly detection field using direct current pressure drop method first
Resistance detects and carries out quality verification, has the advantages that：
1. control that can effectively to voltage sample spot welding quality, and be nondestructive, real-time, comprehensive probe
Measurement.
2. a pair voltage sample point carries out automation 100% full inspection of probe, the quality of welding and having for voltage sample ensure that
Effect property.
3. measuring welding quality by FPC pressure decline methods, the contact resistance of weld is controlled, effectively controls big contact electricity
Hinder the error brought to voltage sample, can effectively welding quality evaluated.
4. the monitoring of welding quality, also results in the control of welding contact resistance, the control of contact resistance causes sampled point
The control of caloric value, effectively reduces the risk that thermal runaway occurs for module.
5th, the present invention is provided with pulling capacity test, and destructive test can be tested by pulling capacity and verifies that pressure decline method is tested repeatedly
Validity.
Brief description of the drawings
Fig. 1 is the flow diagram of the method for the present invention；
Fig. 2 is the structure diagram of apparatus of the present invention；
Fig. 3 is the circuit theory schematic diagram of pressure decline method of the present invention；
Fig. 4 is the pressure drop distribution schematic diagram effectively welded；
Fig. 5 is the relation schematic diagram of welding points and pressure drop/pulling capacity.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The present embodiment provides a kind of battery core voltage sample piece welding quality detection method, including：
Whether pressure fall-off test step, meet setting bar using the voltage drop at the welding region of pressure decline method test measurand
Part；
Overall merit step, the result obtained according to pressure fall-off test step obtain final welding quality.
As shown in Figure 1, the pressure fall-off test step is specially：
101) DC source is passed through between welding region and cell polar ear, and controls the DC source to stablize output.Some
In embodiment, the DC source can be automatically adjusted by electronic load stablizes output.
102) voltage drop between welding region and cell polar ear is measured, judges whether the voltage drop meets setting condition,
If so, then exit, if it is not, then producing warning message.In certain embodiments, it is 0.1mV that described can impose a condition<U<
0.55mV, wherein, U is the voltage drop measured.
It can effectively verify that battery core BUSBAR and FPC samples the Laser Welding Quality of line copper sheet by the above method.Weld matter
Amount influences following 2 parameters：
The pressure drop of-weld, the pressure drop numerical value obtained with respect to FPC among voltage sample process, it is small to can be ignored or
Compensated.
- weld pulling capacity, enough pulling capacities ensure FPC sampling copper sheet secure fit battery cores BUSBAR.
Verify welding quality, can ensure FPC within the product life cycle copper sheet fitting BUSBAR mechanical strength and
The accuracy of battery core drop measurement.
In certain embodiments, which further includes：
Pulling capacity testing procedure, measures the welding pulling capacity to measurand, and the knot obtained by pulling capacity testing procedure
Fruit verifies the validity of pressure fall-off test.
As shown in Fig. 2, the present embodiment also provides and a kind of realizes above-mentioned battery core voltage sample piece welding quality detection method
Detection device, including pressure fall-off test module 1, driving mechanism 3, detection platform 4 and control module 5, pressure fall-off test module 1 and driving
Mechanism 3 is arranged in detection platform 4, and control module 5 connects the pressure fall-off test module 1 and driving mechanism 3 respectively.Wherein, press
Drop test module is used to measure the voltage drop at the welding region；Driving mechanism, for driving measurand to be moved to test
Position；Control module is used to send driving instruction and receives test data, and obtains final welding quality according to test data.
Room temperature control is at 20-30 DEG C when above-mentioned detection device works.
In certain embodiments, the pressure fall-off test module 1 includes DC source 101 and voltage detecting table 102, wherein, directly
The welding region of stream source and measurand connects, for producing stable output；Voltage detecting table passes through probe and measurand
Welding region connects, and link control module, for measuring the voltage drop at the welding region.In the present embodiment, DC source
Output be 10 amperes, voltage detecting table select High Precision Multimeter (mV).
In certain embodiments, the pressure fall-off test module further includes electronic load, is connected with control module, and be connected to
Between the DC source and welding region, for realizing that stablizing for DC source exports under the control instruction of control module.Pressure drop
The circuit diagram of test module is as shown in Figure 3.
In certain embodiments, above-mentioned detection device further includes pulling capacity test module 2, is connected with control module, drawing
Power test module 2 is used to measure the welding pulling capacity to measurand, and control module tests destructive test repeatedly by pulling capacity
Verify the validity of pressure decline method test.
In certain embodiments, the pulling capacity test module 2 includes the pulling capacity test machine with force value sensor
201, the force value sensor is connected with control module, and when pulling capacity test machine carries out pulling capacity test, FPC copper is fixed in one end
Lug is fixed in piece, one end.
In certain embodiments, the driving mechanism includes servomotor and the execution cylinder being connected.
In certain embodiments, the control module includes monitoring host computer, which is also associated with alarm.
Fig. 4 and Fig. 5 shows the relation of effectively welding pressure drop distribution and welding points and pressure drop/pulling capacity.
The welding parameter in actual welding can be obtained by above method, such as：
Copper polar ear and copper tip welding parameter：100% waveform of speed of welding 25mm/s power, 0 frequency 70KHz line spacing
0.03 spiral linear diameter 0.8mm
Copper polar ear and aluminium pole ears welding parameter：100% waveform of speed of welding 50mm/s power, 13 frequency 168KHz line spacing
0.05 spiral linear diameter 1mm
Aluminium pole ears and copper tip welding parameter：100% waveform of speed of welding 25mm/s power, 0 frequency 70KHz line spacing
0.05 spiral linear diameter 1mm
FPC and copper polar ear welding parameter：100% waveform of speed of welding 15mm/s power, 0 frequency 70KHz lines spacing, 0.03 spiral shell
Spin line diameter 0.8mm
FPC and copper tip welding parameter：100% waveform of speed of welding 10mm/s power, 0 frequency 70KHz lines spacing, 0.03 spiral shell
Spin line diameter 0.8mm
Preferred embodiment of the invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Need creative work to conceive according to the present invention and make many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (10)
- A kind of 1. battery core voltage sample piece welding quality detection method, it is characterised in that including：Whether pressure fall-off test step, meet setting condition using the voltage drop at the welding region of pressure decline method test measurand；Overall merit step, the result obtained according to pressure fall-off test step obtain final welding quality.
- 2. battery core voltage sample piece welding quality detection method according to claim 1, it is characterised in that the pressure drop is surveyed Try is specially suddenly：101) DC source is passed through between welding region and cell polar ear, and controls the DC source to stablize output；102) voltage drop between welding region and cell polar ear is measured, judges whether the voltage drop meets setting condition, if so, Then exit, if it is not, then producing warning message.
- 3. battery core voltage sample piece welding quality detection method according to claim 2, it is characterised in that the step 101) in, stablizing for the DC source is automatically adjusted by electronic load and is exported.
- 4. battery core voltage sample piece welding quality detection method according to claim 2, it is characterised in that the setting bar Part is 0.1mV<U<0.55mV, wherein, U is the voltage drop measured.
- 5. battery core voltage sample piece welding quality detection method according to claim 1, it is characterised in that further include：Pulling capacity testing procedure, measures the welding pulling capacity to measurand, and is tested by the result that pulling capacity testing procedure obtains Demonstrate,prove the validity of pressure fall-off test.
- 6. a kind of detection device for realizing battery core voltage sample piece welding quality detection method as claimed in claim 1, it is special Sign is, including：Pressure fall-off test module, for measuring the voltage drop at the welding region；Driving mechanism, for driving measurand to be moved to test position；Detection platform, the pressure fall-off test module and driving mechanism are arranged in the detection platform；Control module, connects the pressure fall-off test module and driving mechanism respectively, for sending driving instruction and receiving test number According to, and final welding quality is obtained according to test data.
- 7. detection device according to claim 6, it is characterised in that the pressure fall-off test module includes：DC source, is connected with the welding region of measurand, for producing stable output；Voltage detecting table, is connected by probe and the welding region of measurand, and link control module, for measuring the weldering Connect the voltage drop at region.
- 8. detection device according to claim 7, it is characterised in that the pressure fall-off test module further includes：Electronic load, is connected with control module, and is connected between the DC source and welding region, in control module That DC source is realized under control instruction stablizes output.
- 9. detection device according to claim 5, it is characterised in that further include pulling capacity test module, the pulling capacity Test module includes the pulling capacity test machine with force value sensor, and the force value sensor is connected with control module.
- 10. detection device according to claim 5, it is characterised in that the control module includes monitoring host computer, the prison Control host computer is also associated with alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448052.5A CN108037467A (en) | 2017-12-27 | 2017-12-27 | A kind of battery core voltage sample piece welding quality detection method and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448052.5A CN108037467A (en) | 2017-12-27 | 2017-12-27 | A kind of battery core voltage sample piece welding quality detection method and detection device |
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| Publication Number | Publication Date |
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| CN108037467A true CN108037467A (en) | 2018-05-15 |
Family
ID=62097559
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711448052.5A Pending CN108037467A (en) | 2017-12-27 | 2017-12-27 | A kind of battery core voltage sample piece welding quality detection method and detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956703A (en) * | 2018-07-17 | 2018-12-07 | 深圳市国威科创新能源科技有限公司 | A kind of detection device and its detection method of welding quality |
| CN109093268A (en) * | 2018-06-05 | 2018-12-28 | 湖北锂诺新能源科技有限公司 | Power battery module Laser Welding Quality appraisal procedure |
| CN111584941A (en) * | 2020-05-26 | 2020-08-25 | 苏州凌威新能源科技有限公司 | Method for testing welding effect of battery tab |
| CN112345982A (en) * | 2020-09-29 | 2021-02-09 | 歌尔科技有限公司 | Method and device for detecting welding condition of circuit element |
| CN114486982A (en) * | 2022-01-17 | 2022-05-13 | 风帆有限责任公司 | Method for detecting laser welding quality of soft package lithium battery tab |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167700A (en) * | 2017-06-28 | 2017-09-15 | 深圳市拓科智能科技有限公司 | The welding spot reliability method of testing and its test device of a kind of battery |
-
2017
- 2017-12-27 CN CN201711448052.5A patent/CN108037467A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167700A (en) * | 2017-06-28 | 2017-09-15 | 深圳市拓科智能科技有限公司 | The welding spot reliability method of testing and its test device of a kind of battery |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093268A (en) * | 2018-06-05 | 2018-12-28 | 湖北锂诺新能源科技有限公司 | Power battery module Laser Welding Quality appraisal procedure |
| CN109093268B (en) * | 2018-06-05 | 2019-06-28 | 湖北锂诺新能源科技有限公司 | The method for obtaining power battery module laser welding bonding wire normal voltage |
| CN108956703A (en) * | 2018-07-17 | 2018-12-07 | 深圳市国威科创新能源科技有限公司 | A kind of detection device and its detection method of welding quality |
| CN111584941A (en) * | 2020-05-26 | 2020-08-25 | 苏州凌威新能源科技有限公司 | Method for testing welding effect of battery tab |
| CN111584941B (en) * | 2020-05-26 | 2021-10-26 | 苏州凌威新能源科技有限公司 | Method for testing welding effect of battery tab |
| CN112345982A (en) * | 2020-09-29 | 2021-02-09 | 歌尔科技有限公司 | Method and device for detecting welding condition of circuit element |
| CN114486982A (en) * | 2022-01-17 | 2022-05-13 | 风帆有限责任公司 | Method for detecting laser welding quality of soft package lithium battery tab |
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Application publication date: 20180515 |