CN217278850U - Pulse insulation two-in-one lithium battery cell short circuit detection device - Google Patents
Pulse insulation two-in-one lithium battery cell short circuit detection device Download PDFInfo
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- CN217278850U CN217278850U CN202220097204.1U CN202220097204U CN217278850U CN 217278850 U CN217278850 U CN 217278850U CN 202220097204 U CN202220097204 U CN 202220097204U CN 217278850 U CN217278850 U CN 217278850U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a pulse insulation two-in-one lithium battery cell short circuit detection device, which belongs to the technical field of lithium battery cells, which comprises an input filter, a power panel, a main control panel, a key panel, a communication panel, an insulation measuring panel, a power module and a high-voltage output terminal, wherein, the input filter is respectively connected with the power module and the power panel, the power panel is connected with the main control panel, the main control panel is respectively connected with the key panel, the communication panel, the power module and the insulation measuring panel, the power module is connected with the high-voltage output terminal, through mixing conventional insulation resistance tester and pulsed lithium cell short circuit tester function in the market, draw the advantage of the two, solve the principle defect that both exist, can examine out before the lithium cell annotates liquid positive and negative pole ear short circuit and short circuit a little comprehensively, hidden danger that insulating impedance is low, test speed is fast, and the detectable rate is high, improves the production beat and the product quality of producing the line.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a two unification lithium cell short circuit detection devices of pulse insulation.
Background
With the strong promotion of new energy application in China, the usage amount of batteries is larger and larger, but short circuit or micro short circuit between the positive electrode and the negative electrode of the battery core can be caused due to careless carelessness of the production and manufacturing process.
The quality hidden troubles are difficult to detect under normal test conditions before electrolyte injection, but after products leave factory, short circuits or micro short circuits can slowly generate heat in the use process, nearby diaphragms are gradually aged and can slowly develop interlayer short circuits to cause heat of batteries, and the batteries can explode under extreme conditions.
At present, the main testing methods in the industry mainly comprise two methods: one is that before injecting electrolyte, an insulation tester is used to apply high DC voltage to measure the resistance between the positive and negative electrodes of the battery core, and if the resistance is less than a set threshold value, the battery core is judged to be unqualified. The other method is a pulse test method, and the test electric core is judged to be unqualified when the drop voltage is higher than a set value due to voltage drop caused by short circuit or poor insulation.
The two methods have respective advantages and disadvantages, and most of battery manufacturers in the market adopt an insulation resistance tester to judge whether the insulation of the battery core is good or bad. However, the insulation resistance test method has the disadvantages that the test speed is slow, several seconds are needed until the test result is stable, and some battery manufacturers set the test time of the insulation resistance tester to be more than 5 seconds. The requirement on the test beat is not high, and the test speed obviously cannot meet the requirement on the manufacturers with high productivity and high requirement on the test speed of an automatic production line.
And the possibility of missed detection exists in the cell testing of the insulation tester. If the battery core diaphragm has tiny metal powder, namely, the situation of micro short circuit exists, the insulation resistance tester is adopted to test the leakage. This is because the test voltage of the insulation resistance tester is always kept at a set value, and the output power of most insulation resistance testers on the market is large, reaching 500W or more. The tiny metal particles of the battery core are broken down and burnt in the test, and obvious black spots can be found at the breakdown points by disassembling the battery core. Because the metal particles are burnt, the battery cell is often changed into a state with larger insulation resistance again, but the detection value is an average value in a period of time, the insulation resistance tester cannot detect the situation, and the situation can be judged as a qualified product by mistake.
The battery cell is tested in a pure pulse mode, the testing speed is high, and the battery cell with the micro short circuit can be effectively detected. However, for a power battery with a static capacitance value of several thousand nanofarads, if the insulation resistance of the power battery is larger than 1M omega and smaller than 10M omega determined to be defective by customers, the difference between the Vd2 value and the good product is small by adopting a pulse free discharge mode, and the defective product is difficult to determine through Vd 2.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two unification lithium cell short circuit detection devices of pulse insulation aims at solving foretell technical defect.
The utility model provides a specific technical scheme as follows:
the utility model provides a pair of two unification lithium cell short circuit detection device of pulse insulation includes input filter, power strip, main control board, keypad, communication board, insulating measurement board, power module and high-pressure output terminal, wherein, input filter respectively with power module with the power strip is connected, the power strip with the main control board is connected, the main control board respectively with the keypad the communication board power module with insulating measurement board is connected, power module with high-pressure output terminal connects, high-pressure output terminal with insulating measurement board is connected.
Optionally, an input end of the input filter is connected to the single-phase power supply module, two output ends of the input filter are respectively connected to the power module and the power board, an input end of the high-voltage output terminal is connected to the power module, and an output end of the high-voltage output terminal is connected to the insulation measurement board.
Optionally, the main control board is in bidirectional communication connection with the key board, the communication board, the power module and the insulation measuring board, and the power module is in unidirectional communication connection with the high-voltage output terminal.
Optionally, the input end of the power panel is connected to the output end of the input filter, and the output end of the power panel is connected to the input end of the main control panel.
Optionally, the input filter is configured to suppress conducted interference and radiated interference generated by a high-frequency switch of the power device, and the power board includes an input overvoltage protection circuit and an input undervoltage protection circuit.
Optionally, the power board supplies power to the key board, the communication board, the insulation measuring board and the power module through the main control board, and the power module includes a power frequency transformer, a high voltage board and a discharge board.
The utility model discloses following beneficial technological effect has:
the utility model provides a two unification lithium cell short circuit detection device of pulse insulation includes input filter, the power strip, the main control board, the keypad, the communication board, the insulation measurement board, power module and high voltage output terminal, wherein, input filter is connected with power module and power strip respectively, the power strip is connected with the main control board, the main control board respectively with the keypad, the communication board, power module and insulation measurement board are connected, power module and high voltage output terminal are connected, through mixing conventional insulation resistance tester and pulsed lithium cell short circuit tester function in the market, draw the advantage of the two, solve the principle defect that both exist, positive negative pole interaural short circuit and little short circuit before can comprehensively examining the liquid of lithium cell, the low hidden danger of insulation resistance, the test is fast, the relevance ratio is high, the production beat and the product quality of producing the line are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is the utility model discloses a two unification lithium cell short circuit detection device's of pulse insulation frame construction sketch map.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following will describe a pulse insulation two-in-one lithium battery short circuit detection device according to an embodiment of the present invention in detail with reference to fig. 1.
Referring to fig. 1, the embodiment of the utility model provides a pair of two unification lithium cell short circuit detection device of pulse insulation includes input filter 1, power strip 2, main control board 3, keypad 4, communication board 5, insulating measuring board 6, power module 7, and high-voltage output terminal 8, wherein, input filter 1 is connected with power module 7 and power strip 2 respectively, power strip 2 is connected with main control board 3, main control board 3 is connected with keypad 4, communication board 5, power module 7 and insulating measuring board 6 respectively, power module 7 and high-voltage output terminal 8 are connected.
Referring to fig. 1, an input end of the input filter 1 is connected to the single-phase power supply module, and two output ends of the input filter 1 are respectively connected to the power module 7 and the power board 2. The input end of the high-voltage output terminal 8 is connected with the power module 7, and the output end of the high-voltage output terminal 8 is connected with the insulation measuring plate 6. The main control board 3 is in bidirectional communication connection with the key board 4, the communication board 5, the power module 7 and the insulation measuring board 6, and the power module 7 is in unidirectional communication connection with the high-voltage output terminal 8. The input end of the power panel 2 is connected with the output end of the input filter 1, and the output end of the power panel 2 is connected with the input end of the main control panel 3. The power panel 2 supplies power to the key sheet 4, the communication board 5, the insulation measuring board 6 and the power module 7 through the main control board 3.
Referring to fig. 1, an input filter 1 is installed at a power supply port, and is used for suppressing conducted interference and radiated interference generated by a high-frequency switch of a power device, and has common-mode and differential-mode suppression capabilities, so that system reliability can be improved. The power panel 2 comprises an input overvoltage and undervoltage abnormal protection circuit. The functions of the main control board 3 include test voltage setting of the whole machine, real-time output voltage waveform sampling display of a tester, detection of a cell insulation impedance sampling value, result judgment, cell abnormity alarm and the like.
The power module 7 comprises a power frequency transformer, a high-voltage plate and a discharge plate and is mainly responsible for providing direct-current high voltage required by detection. The power frequency transformer provides the high-pressure primary voltage of production, because the bad electricity core has the condition of puncturing discharge during the detection, has higher requirement to the rated power of transformer. The high-voltage board is the core of pulse test, and is responsible for producing the high voltage that charges that the detection needs set for, and the voltage waveform on the utmost point ear of sampling electric core simultaneously listens the good and bad of electric core. The sampling resistor corresponds to the output impedance of the tester, and the larger the requirement is, the better the requirement is, and meanwhile, the requirement on precision can be met. After the test is finished, the discharge plate discharges electricity to the tested core, and the safety of workers on a subsequent station production line is guaranteed.
The insulation measuring plate 6 realizes sampling of insulation resistance values of the tested core. The utility model discloses two unification lithium cell short circuit detection device of pulse insulation has overcome conventional insulation tester and has been applied to the big volume value testee test time of electricity core class long, the unstable defect of test value. Because the internal sampling resistor of the conventional insulation tester is at K level or even M level, and the sampling resistor is connected in series in the whole test loop, when a large-volume-value tested object is tested, the charging time is long, and the insulation resistance test value can be stable within several seconds. And the embodiment of the utility model provides a, survey the pulse earlier and survey afterwards insulating. The insulation resistance test is initial, utilizes the holding voltage of pulse, can make the electrical core voltage of being surveyed reach the setting value fast, has saved the initial charging process of conventional insulation tester, can shorten the test time of insulation resistance from several seconds to several seconds at zero point, and the speed promotes by a wide margin.
The functions of the main control board comprise setting of test voltage of the whole machine, sampling and displaying of voltage waveform output by the tester in real time, detection of insulation impedance sampling values of the battery cell, result judgment, abnormal alarm of the battery cell and the like.
The utility model provides a two unification lithium cell short circuit detection device of pulse insulation includes input filter, the power strip, the main control board, the keypad, the communication board, the insulation measurement board, power module and high voltage output terminal, wherein, input filter is connected with power module and power strip respectively, the power strip is connected with the main control board, the main control board respectively with the keypad, the communication board, power module and insulation measurement board are connected, power module and high voltage output terminal are connected, through mixing conventional insulation resistance tester and pulsed lithium cell short circuit tester function in the market, draw the advantage of the two, solve the principle defect that both exist, positive negative pole interaural short circuit and little short circuit before can comprehensively examining the liquid of lithium cell, the low hidden danger of insulation resistance, the test is fast, the relevance ratio is high, the production beat and the product quality of producing the line are improved.
It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides an insulating two unification lithium cell short circuit detection device of pulse, a serial communication port, two unification lithium cell short circuit detection device of pulse includes input filter, power strip, main control board, keypad, communication board, insulating measuring board, power module and high-voltage output terminal, wherein, input filter respectively with power module with the power strip is connected, the power strip with the main control board is connected, the main control board respectively with the keypad the communication board the power module with insulating measuring board is connected, the power module with high-voltage output terminal connects, high-voltage output terminal with insulating measuring board connects.
2. The short-circuit detection device for the pulse insulation two-in-one lithium battery cell according to claim 1, wherein an input end of the input filter is connected with a single-phase power supply module, two output ends of the input filter are respectively connected with the power module and the power panel, an input end of the high-voltage output terminal is connected with the power module, and an output end of the high-voltage output terminal is connected with the insulation measuring panel.
3. The short-circuit detection device for the pulse insulation two-in-one lithium battery cell according to claim 1, wherein the main control board is in bidirectional communication connection with the key board, the communication board, the power module and the insulation measuring board, and the power module is in unidirectional communication connection with the high-voltage output terminal.
4. The short-circuit detection device for the pulse insulation two-in-one lithium battery cell according to claim 1, wherein an input end of the power panel is connected with an output end of the input filter, and an output end of the power panel is connected with an input end of the main control panel.
5. The short-circuit detection device for the pulse insulation two-in-one lithium battery cell according to claim 1, wherein the input filter is used for suppressing conduction interference and radiation interference generated by a high-frequency switch of a power device, and the power panel comprises an input overvoltage and undervoltage abnormal protection circuit.
6. The short-circuit detection device for the pulse insulation two-in-one lithium battery cell according to claim 1, wherein the power panel provides power to the keypad, the communication board, the insulation measuring board and the power module through the main control board, and the power module comprises a power frequency transformer, a high voltage board and a discharge board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220097204.1U CN217278850U (en) | 2022-01-14 | 2022-01-14 | Pulse insulation two-in-one lithium battery cell short circuit detection device |
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| CN202220097204.1U CN217278850U (en) | 2022-01-14 | 2022-01-14 | Pulse insulation two-in-one lithium battery cell short circuit detection device |
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| CN217278850U true CN217278850U (en) | 2022-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877210A (en) * | 2022-12-08 | 2023-03-31 | 青岛艾测科技有限公司 | Pressure-maintaining adjustable capacitive load insulation detection method, device and equipment |
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2022
- 2022-01-14 CN CN202220097204.1U patent/CN217278850U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877210A (en) * | 2022-12-08 | 2023-03-31 | 青岛艾测科技有限公司 | Pressure-maintaining adjustable capacitive load insulation detection method, device and equipment |
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