CN109342968B - Device and method for testing battery module before welding - Google Patents
Device and method for testing battery module before welding Download PDFInfo
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- CN109342968B CN109342968B CN201811301615.2A CN201811301615A CN109342968B CN 109342968 B CN109342968 B CN 109342968B CN 201811301615 A CN201811301615 A CN 201811301615A CN 109342968 B CN109342968 B CN 109342968B
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- 238000012360 testing method Methods 0.000 title claims abstract description 107
- 238000003466 welding Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title abstract description 13
- 239000000523 sample Substances 0.000 claims abstract description 78
- 238000010998 test method Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the field of new energy battery assembly, in particular to a device and a method for testing a battery module before welding. Each probe fixing block comprises two positive electrode probes and two negative electrode probes, and the two positive electrode probes are respectively connected with a first positive electrode wire and a second positive electrode wire through an automatic switch; the two negative electrode probes are respectively connected with a first negative electrode wire and a second negative electrode wire through an automatic switch, and the automatic switches of the positive electrode probes and the negative electrode probes connected with the second positive electrode wire and the first negative electrode wire are collectively called as a first automatic switch group; the first positive electrode wire, the second positive electrode wire, the first negative electrode wire and the second negative electrode wire are respectively connected with the first test bus and the second test bus through automatic switches and are collectively called a second automatic switch group; the first test bus and the second test bus are respectively connected with the universal meter and the voltage withstanding instrument through automatic switches, and the automatic switches form a third automatic switch group. The invention has the characteristics of high test efficiency, accurate test result, flexible operation and the like.
Description
Technical Field
The invention relates to the field of new energy battery assembly, in particular to a device and a method for testing a battery module before welding.
Background
At present, in the field of new energy battery assembly, most of module pre-welding test systems adopt manual wiring test, and few automatic test systems exist. The use of manual wiring has a number of disadvantages: the insulation voltage-withstanding test is inaccurate, testers need to frequently connect wires, the operation is too much, the efficiency is reduced, the false welding cannot be found in time, and most of the false welding cannot be found only after sparks or combustion occurs. In the existing test mode, only one test point is arranged on each battery pole, for example, the situation that the bus bar and the battery pole are in cold joint or poor in contact and the like can be found only through external temperature measurement or the phenomenon of fire occurrence is seen, and larger loss can be caused.
Therefore, it is necessary to design a module pre-welding testing device in the field of new energy batteries to overcome the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device and a method for testing a battery module before welding. The invention can realize the voltage test of the single battery, the switching of any channel of the adjacent positive electrode insulation voltage withstand test, the switching of any channel of the positive electrode to the shell insulation test and the switching of any channel of the positive electrode and the negative electrode test of the battery. The circuit device has the characteristics of ingenious circuit design, flexible circuit switching, high test efficiency, accurate test result, flexible operation and the like, and is applicable to a parameter test system for a plurality of single batteries.
The technical scheme of the invention is as follows: the utility model provides a testing arrangement before battery module welds, includes a plurality of probe fixed blocks, first automatic switch group, first positive pole line, second positive pole line, first negative pole line, second automatic switch group, first test bus, second test bus, third automatic switch group, universal meter, withstand voltage appearance, its characterized in that: each probe fixing block comprises two positive electrode probes and two negative electrode probes, and the two positive electrode probes are respectively connected with a first positive electrode wire and a second positive electrode wire through an automatic switch; the two negative electrode probes are respectively connected with a first negative electrode wire and a second negative electrode wire through an automatic switch, and the automatic switches of the positive electrode probes and the negative electrode probes connected with the second positive electrode wire and the first negative electrode wire are collectively called as a first automatic switch group; the first positive electrode wire, the second positive electrode wire, the first negative electrode wire and the second negative electrode wire are respectively connected with the first test bus and the second test bus through automatic switches and are collectively called a second automatic switch group; the first test bus and the second test bus are respectively connected with the universal meter and the voltage withstanding instrument through automatic switches, and the automatic switches form a third automatic switch group.
The battery module pre-welding testing device is characterized in that: the probe fixing device comprises twenty probe fixing blocks, wherein the twenty probe fixing blocks are arranged between a first positive electrode wire and a second positive electrode wire and between a first negative electrode wire and a second negative electrode wire.
The battery module pre-welding testing device is characterized in that: and the two external probes are respectively connected to the first test bus and the second test bus through automatic switches.
The battery module pre-welding testing device is characterized in that: the automatic switches in the first automatic switch group, the second automatic switch group and the third automatic switch group adopt relay switches.
The battery module pre-welding testing device is characterized in that: and fuses are arranged between each positive electrode probe, each negative electrode probe and the automatic switch in the first automatic switch group.
The battery module pre-welding testing device is characterized in that: and a fuse is arranged among the universal meter, the voltage withstanding instrument and the automatic switch of the third automatic switch group.
The invention also discloses a method for testing the battery module before welding, wherein battery poles among adjacent single batteries are connected by adopting a bus bar, and the method is characterized in that: when in test, one electrode adopts two probes to form two-point test, one probe is tightly pressed on the battery pole, the other probe is tightly pressed on the busbar, and before electrifying, whether the electrical connection between the busbar and the single battery is reliable or not is determined in advance by testing the resistance of the two-point test; when the power is on, whether the voltage difference exists between the voltages on the two probes on the same electrode is tested, and if the voltage difference exists, the test is terminated.
The method for testing the battery module before welding is characterized by comprising the following steps of: the battery module pre-welding testing device is adopted.
The beneficial effects of the invention are as follows: firstly, the relay is used together in insulation voltage test and monomer voltage test, breaks through conventional design mode and realizes the flexible switching function of the relay. Secondly, the test efficiency is high, the test result is accurate, the operation is flexible, and the like. Thirdly, the conditions of cold joint or poor contact and the like of the bus bar and the battery pole can be predicted in advance, the situation can be found without temperature rise or spark occurrence, and the occurrence of combustion phenomenon in part of the test process can be avoided in advance, so that the test cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a probe fixing block.
Fig. 2 is a schematic diagram showing the structural relationship between a single battery and a bus bar.
Reference numerals illustrate: the test device comprises a probe fixing block C1, a positive electrode probe 11, a negative electrode probe 12, a first automatic switch group 2, a first positive electrode wire 21, a second positive electrode wire 22, a first negative electrode wire 23, a second negative electrode wire 24, a second automatic switch group 3, a first test bus 31, a second test bus 32, a third automatic switch group 4, a universal meter 5, a voltage withstanding instrument 6, an external probe 7, a single battery 8, a bus bar 9 and a battery pole post 10.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention may be provided with a plurality of probe-bearing blocks C1, one in fig. 1, or twenty probe-bearing blocks, each of which has the same structure, and the plurality of probe-bearing blocks C1 are provided between the positive electrode lines (first positive electrode line 21, second positive electrode line 22) and the negative electrode lines (first negative electrode line 23, second negative electrode line 24), as required. According to the invention, the number of the detection fixing blocks can be determined according to actual conditions, each probe fixing block can measure one single battery, and the more the detection fixing blocks are, the more batteries can be measured at one time, so that the intelligent advantage of the invention is more obvious.
As shown in fig. 1, the pre-welding test device for a battery module of the present invention includes a probe fixing block C1, a first automatic switch group 2, a first positive line 21, a second positive line 22, a first negative line 23, a second negative line 24, a second automatic switch group 3, a first test bus 31, a second test bus 32, a third automatic switch group 4, a multimeter 5, and a voltage withstanding instrument 6, wherein the probe fixing block C1 includes two positive electrode probes 11 and two negative electrode probes 12, and the two positive electrode probes 11 are respectively connected with the first positive line 21 and the second positive line 22 through an automatic switch; the two negative electrode probes 12 are connected to the first negative electrode line 23 and the second negative electrode line 24 through one automatic switch, and the automatic switches for connecting the positive electrode probe 11 and the negative electrode probe 12 to the second positive electrode line 22 and the first negative electrode line 23 are collectively referred to as a first automatic switch group 2. The first positive line 21, the second positive line 22, the first negative line 23, and the second negative line 24 are connected to the first test bus 31 and the second test bus 32 through automatic switches, respectively, and are collectively referred to as a second automatic switch group 3 (k3_17 to k3_25) in total. The first test bus 31 and the second test bus 32 are connected to the multimeter 5 and the voltage tester 6 via an automatic switch (k3_27 to k3_30), respectively, which forms a third automatic switch group 4.
As shown in fig. 1, the present invention further includes two external probes 7, and the external probes 7 are respectively connected to the first test bus 31 and the second test bus 32 through automatic switches (k3_25 to k3_26), where the automatic switches are the third automatic switch group 4. When the external probe 7 is contacted with the battery pack shell, the insulation performance of the single battery 8 and the battery pack shell can be measured through the external probe 7.
In the present invention, the first automatic switch group 2 is an automatic switch of probes (including all positive probes and all negative probes) and wires (first positive wire 21, second positive wire 22, first negative wire 23 and second negative wire 24). The second recloser module 3 is a recloser of the polar line and the test bus (including the first test bus 31 and the second test bus 32). The third automatic switch group 4 is an automatic switch of a test bus and a test device (a universal meter 5, a voltage withstand meter 6 and an external probe 7).
In the invention, the automatic switches in the first automatic switch group 2, the second automatic switch group 3 and the third automatic switch group 4 can adopt relay switches, and the relay preferably has a voltage-withstanding level higher than that of a 4KV relay.
As shown in fig. 1, fuses (F1, F2, F3, F4 in fig. 1) are provided between each probe and the recloser in the first recloser group 2, and fuses (F81, F82, F83, F84 in fig. 1) are provided between the test bus and the test device.
The invention also discloses a method for testing the battery module before welding, wherein the battery pole posts 10 between the adjacent single batteries 8 are connected by adopting the bus bars 9, as shown in fig. 2, during the test, one electrode adopts two probes to form two-point test, one probe is tightly pressed on the battery pole posts 10, the other probe is tightly pressed on the bus bars 9, and before electrifying, whether the electric connection between the bus bars 9 and the single batteries 8 is reliable or not is determined in advance by testing the resistance tested by the two points. If the resistance value is large, it can be stated that the connection between the battery post 10 of the single battery 8 and the busbar 9 is problematic, such as insufficient soldering, weak crimping, etc., and measures can be taken. When the power is on, the voltage difference between the voltages of the two probes on the same electrode is tested, if the voltage difference exists, the bus 9 is easy to generate a sparking phenomenon, the test can be immediately stopped, and whether the battery pole 10 and the bus 9 have a cold joint or not can be detected. Because the device adopts the automatic switch, the whole testing process can be automatically controlled, so that the voltage of two probes on each battery pole 10 can be rapidly tested, the test can be stopped when the fire phenomenon does not occur, and the problems caused by the current power-off mode through temperature induction are avoided. Generally, the power is cut off due to overhigh temperature, the ignition time is required to be longer, the ignition phenomenon is often caused, and larger loss is caused. In the method, partial problems are discharged in a resistance test mode under the condition of no power-on, and when the power-on is performed, the voltages of two probes on the same battery pole 10 are tested first, so that the test circuit can be rapidly and automatically cut off when the problems occur, the safety of the test circuit is ensured, and the test cost is reduced.
The working process of the invention is as follows: each probe fixing block C1 is correspondingly used for testing one single battery 8, each battery pole 10 of the single battery 8 is provided with two probes, the two probes are respectively connected with the battery pole 10 and the bus bar 9 in a pressing mode, and automatic switches in the first automatic switch group 2, the second automatic switch group 3 and the third automatic switch group 4 are controlled through programs, detection or judgment of battery insulativity, welding quality, charging and discharging and the like are rapidly completed, and testing speed and testing accuracy are improved.
Claims (7)
1. The utility model provides a testing arrangement before battery module welds, includes a plurality of probe fixed blocks, first automatic switch group, first positive pole line, second positive pole line, first negative pole line, second automatic switch group, first test bus, second test bus, third automatic switch group, universal meter, withstand voltage appearance, its characterized in that: each probe fixing block comprises two positive electrode probes and two negative electrode probes, and the two positive electrode probes are respectively connected with a first positive electrode wire and a second positive electrode wire through an automatic switch; the two negative electrode probes are respectively connected with a first negative electrode wire and a second negative electrode wire through an automatic switch, and the automatic switches of the positive electrode probes and the negative electrode probes connected with the second positive electrode wire and the first negative electrode wire are collectively called as a first automatic switch group; the first positive electrode wire, the second positive electrode wire, the first negative electrode wire and the second negative electrode wire are respectively connected with the first test bus and the second test bus through automatic switches and are collectively called a second automatic switch group; the first test bus and the second test bus are respectively connected with the universal meter and the voltage withstanding instrument through automatic switches and are collectively called a third automatic switch group.
2. The battery module pre-welding test device according to claim 1, wherein: the probe fixing device comprises twenty probe fixing blocks, wherein the twenty probe fixing blocks are arranged between a first positive electrode wire and a second positive electrode wire and between a first negative electrode wire and a second negative electrode wire.
3. The battery module pre-welding test device according to claim 1, wherein: and the two external probes are respectively connected to the first test bus and the second test bus through automatic switches.
4. The battery module pre-welding test device according to claim 1, wherein: the automatic switches in the first automatic switch group, the second automatic switch group and the third automatic switch group adopt relay switches.
5. The battery module pre-welding test device according to claim 1, wherein: and fuses are arranged between each positive electrode probe, each negative electrode probe and the automatic switch in the first automatic switch group.
6. The battery module pre-welding test device according to claim 1, wherein: and a fuse is arranged among the universal meter, the voltage withstanding instrument and the automatic switch of the third automatic switch group.
7. A battery module pre-welding test method is characterized in that battery poles among adjacent single batteries are connected by bus bars: testing by using the battery module pre-welding testing device of claim 1; when in test, one electrode adopts two probes to form two-point test, one probe is tightly pressed on the battery pole, the other probe is tightly pressed on the busbar, and before electrifying, whether the electrical connection between the busbar and the single battery is reliable or not is determined in advance by testing the resistance of the two-point test; when the power is on, whether the voltage difference exists between the voltages on the two probes on the same electrode is tested, and if the voltage difference exists, the test is terminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811301615.2A CN109342968B (en) | 2018-11-02 | 2018-11-02 | Device and method for testing battery module before welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811301615.2A CN109342968B (en) | 2018-11-02 | 2018-11-02 | Device and method for testing battery module before welding |
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| Publication Number | Publication Date |
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| CN109342968A CN109342968A (en) | 2019-02-15 |
| CN109342968B true CN109342968B (en) | 2024-03-15 |
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| CN201811301615.2A Active CN109342968B (en) | 2018-11-02 | 2018-11-02 | Device and method for testing battery module before welding |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751689A (en) * | 2020-05-25 | 2020-10-09 | 福建星云电子股份有限公司 | Voltage withstand insulation test method for lithium battery module total positive electrode to shell |
| CN111665442A (en) * | 2020-05-26 | 2020-09-15 | 上海电享信息科技有限公司 | Method for detecting connection quality of bus bar in series circuit in new energy lithium battery pack |
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| JPH11275765A (en) * | 1998-03-24 | 1999-10-08 | Fuji Elelctrochem Co Ltd | Charging and discharging test apparatus for battery |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9484604B2 (en) * | 2013-02-25 | 2016-11-01 | The Boeing Company | Battery module system |
| CN106786944B (en) * | 2016-12-31 | 2020-12-18 | 华为技术有限公司 | Sampling circuit, equalization circuit and system of single batteries of series battery pack |
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2018
- 2018-11-02 CN CN201811301615.2A patent/CN109342968B/en active Active
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| US6249125B1 (en) * | 2000-03-03 | 2001-06-19 | National Instruments Corporation | Test system for detecting defective batteries |
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| 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 |
| CN107462838A (en) * | 2017-08-02 | 2017-12-12 | 合肥国轩高科动力能源有限公司 | A kind of lithium-ion-power cell module rosin joint detection method |
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