CN112630664A - Lithium battery short circuit failure analysis method and detection device - Google Patents
Lithium battery short circuit failure analysis method and detection device Download PDFInfo
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- CN112630664A CN112630664A CN202011507764.1A CN202011507764A CN112630664A CN 112630664 A CN112630664 A CN 112630664A CN 202011507764 A CN202011507764 A CN 202011507764A CN 112630664 A CN112630664 A CN 112630664A
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- pole piece
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 238000004458 analytical method Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 title claims description 12
- 239000000428 dust Substances 0.000 claims abstract description 71
- 238000003825 pressing Methods 0.000 claims abstract description 66
- 239000002245 particle Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims 2
- 238000012795 verification Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to the field of lithium battery manufacturing, in particular to a lithium battery short circuit failure analysis method, which comprises the following steps: providing dust and analysis parameters corresponding to the dust, wherein the analysis parameters comprise the type and the particle size of the dust; stacking the positive pole piece, the diaphragm and the negative pole piece in sequence, wherein the dust is arranged between the positive pole piece and the diaphragm, or the dust is arranged between the negative pole piece and the diaphragm; applying pressure to the positive pole piece and the negative pole piece to tightly press the positive pole piece and the negative pole piece; providing voltage for the positive pole piece and the negative pole piece; adjusting the pressure and/or voltage until the positive pole piece and the negative pole piece are short-circuited; the corresponding pressure and voltage at the time of dust short circuit under the analysis parameters were recorded. By repeating the steps, the short-circuit data of the dust with different analysis parameters under a certain condition can be obtained, and therefore after the lithium battery is short-circuited in the safety verification, the recorded data can be inquired and compared, and the dust can be quickly found out.
Description
Technical Field
The invention relates to the field of lithium battery manufacturing, in particular to a lithium battery short circuit failure analysis method and a lithium battery short circuit failure detection device.
Background
In the production and manufacturing process of the lithium ion battery, dust on the positive pole piece and the negative pole piece falls off, a diaphragm between the positive pole piece and the negative pole piece can be punctured, and the positive pole piece and the negative pole piece form a loop through the dust under high pressure, so that the battery is short-circuited and fails. The current manufacturer can carry out safety verification to the lithium cell, and through exerting pressure and switch-on high pressure to the lithium cell, the lithium cell of inside inefficacy then directly rejects. However, the process is time-consuming, labor-consuming and material-wasting, and the dust can be burnt when the positive and negative electrode plates are short-circuited, so that the dust can not be determined, the reason for generating the dust can not be found, and the lithium batteries produced in the next batch still have the dust.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lithium battery short circuit failure analysis method and a lithium battery short circuit failure detection device aiming at determining data of lithium battery short circuit failure caused by dust aiming at overcoming the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: in a first aspect, a method for analyzing short circuit failure of a lithium battery is provided, which includes: providing dust and analysis parameters corresponding to the dust, wherein the analysis parameters comprise the type and the particle size of the dust; sequentially stacking a positive pole piece, a diaphragm and a negative pole piece, wherein the dust is arranged between the positive pole piece and the diaphragm, or the dust is arranged between the negative pole piece and the diaphragm; applying pressure to the positive pole piece and the negative pole piece to compress the positive pole piece and the negative pole piece; providing voltage to the positive pole piece and the negative pole piece; adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short-circuited; and recording the corresponding pressure and voltage when the dust is short-circuited under the analysis parameters.
Further, the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short-circuited comprises: adjusting the pressure to a preset pressure value; and increasing the voltage until the positive pole piece and the negative pole piece are short-circuited.
Further, the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short-circuited comprises: adjusting the voltage to a preset voltage value; and adjusting the pressure until the positive pole piece and the negative pole piece are short-circuited.
Further, the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short-circuited comprises: adjusting the pressure to a preset pressure value, and adjusting the voltage to a preset voltage value; synchronously increasing the pressure and the voltage until the positive pole piece and the negative pole piece are short-circuited.
In a second aspect, a detection device for analyzing short circuit failure of a lithium battery is provided, which applies the method according to the first aspect, and includes: the device comprises a first conductive pressing plate, a second conductive pressing plate and a driving assembly, wherein the first conductive pressing plate is used for being connected with a voltage-adjustable power supply; the second conductive pressing plate is used for being connected with the power supply, and the second conductive pressing plate is arranged opposite to the first conductive pressing plate; the driving assembly is connected with the first conductive pressing plate to drive the first conductive pressing plate to move towards the second conductive pressing plate, wherein the driving force of the driving assembly is adjustable to adjust the pressure between the first conductive plate and the second conductive plate.
Further, the drive assembly includes: the two ends of the push rod are respectively connected with the cylinder and the first conductive pressing plate, and the push rod is driven by the cylinder to push the first conductive pressing plate to move towards the second conductive pressing plate.
Further, still include the support, it includes: the first fixing plate is connected with the connecting plate; the cylinder is arranged on the first fixing plate, and the push rod penetrates through the first fixing plate and then is connected with the first conductive pressing plate; the second fixing plate is opposite to the first conductive pressing plate and is connected with the connecting plate; the second conductive pressing plate is mounted on the surface of the second fixing plate opposite to the first conductive pressing plate.
Further, the device also comprises a first insulating plate which is installed between the push rod and the first conductive pressure plate.
Further, a second insulating plate is further included, which is installed between the second fixing plate and the second conductive pressing plate.
Further, the first and second conductive pressing plates are made of copper.
The dust analysis method has the advantages that dust with corresponding analysis parameters is arranged among the positive pole piece, the diaphragm and the negative pole piece which are sequentially stacked, the positive pole piece, the diaphragm and the negative pole piece which are sequentially stacked are used for simulating the lithium battery, voltage and/or pressure are changed until the positive pole piece and the negative pole piece are in short circuit by providing voltage and pressure for the positive pole piece, and the corresponding pressure and voltage of the dust when the positive pole piece and the negative pole piece are in short circuit under the analysis parameters are recorded. And replacing different analysis parameters, namely replacing different types and sizes of dust, and repeating the steps to obtain the data of the dust short circuit under different analysis parameters.
Drawings
The following detailed description of embodiments of the invention will be made with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic flow chart of a lithium battery short circuit failure analysis method according to the present invention;
FIG. 2 is a flowchart of an embodiment of a lithium battery short circuit failure analysis method step S150 according to the present invention;
FIG. 3 is a flowchart of another embodiment of the short-circuit failure analysis method for lithium battery of the present invention, step S150;
FIG. 4 is a flowchart of another embodiment of the short-circuit failure analysis method for lithium batteries according to step S150 of the present invention;
FIG. 5 is a schematic view of the overall structure of the present invention;
fig. 6 is a schematic diagram when a positive electrode sheet, a separator, dust, and a negative electrode sheet are stacked.
In the figure: 1. a first conductive platen; 2. a second conductive platen; 3. a drive assembly; 31. a cylinder; 32. a push rod; 4. a support; 41. a connecting plate; 42. a first fixing plate; 43. a second fixing plate; 5. a first insulating plate; 6. a second insulating plate; 7. a wire; 8. a positive electrode plate; 9. a diaphragm; 10. a negative pole piece; 11. and (3) dust.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Referring to fig. 1, the present invention provides a lithium battery short circuit failure analysis method, which includes the following steps:
s110, providing dust 11 and analysis parameters corresponding to the dust 11, wherein the analysis parameters comprise the type and the particle size of the dust 11;
s120, stacking the positive pole piece 8, the diaphragm 9 and the negative pole piece 10 in sequence, wherein the dust 11 is arranged between the positive pole piece 8 and the diaphragm 9, or the dust 11 is arranged between the negative pole piece 10 and the diaphragm 9;
s130, applying pressure to the positive pole piece 8 and the negative pole piece 10 to tightly press the positive pole piece 8 and the negative pole piece 10;
s140, providing voltage for the positive pole piece 8 and the negative pole piece 10;
s150, adjusting the pressure and/or the voltage until the positive pole piece 8 and the negative pole piece 10 are in short circuit;
and S160, recording the corresponding pressure and voltage when the dust 11 is short-circuited under the analysis parameters.
The dust 11 with corresponding analysis parameters is arranged among the positive pole piece 8, the diaphragm 9 and the negative pole piece 10 which are sequentially stacked, the positive pole piece 8, the diaphragm 9 and the negative pole piece 10 which are sequentially stacked are used for simulating the lithium battery, voltage and/or pressure are changed until the positive pole piece 8 and the negative pole piece 10 are in short circuit by providing voltage and pressure for the positive pole piece 8, and the corresponding pressure and voltage of the dust 11 when the positive pole piece 8 and the negative pole piece 10 are in short circuit under the analysis parameters are recorded. And replacing different analysis parameters, namely replacing different types and sizes of dust 11, and repeating the steps to obtain the short-circuit data of the dust 11 under different analysis parameters. From this, in lithium cell safety verification, the condition that receives takes place the short circuit when applying certain voltage and certain pressure, through comparing the data that record, then can be quick find out what kind of dust 11, can trace back to the source from this, find out the source of dust 11, can have corresponding from this inspect cleanly to the raw materials. The production efficiency and the qualified rate of the lithium battery can be effectively ensured.
In one embodiment, referring to fig. 2, step S150 includes:
s151, adjusting the pressure to a preset pressure value;
and S152, increasing the voltage until the positive pole piece 8 and the negative pole piece 10 are short-circuited.
In a specific embodiment, for example, the provided dust 11 is a metal, the particle size is 32 meshes, the preset pressure value is 20N, the voltage is increased by 1V each time until the positive electrode tab 8 and the negative electrode tab 10 are short-circuited, and the voltage value applied to the 32-mesh dust 11 during short-circuiting at the 20N pressure value is recorded. Further, only the preset pressure value is changed, such as increased to 21N or decreased to 19N, until the positive electrode tab 8 and the negative electrode tab 10 are short-circuited, and the voltage value of the 32-mesh dust 11 at the pressure value of 21N or 19N at the time of short-circuiting is recorded. From this, if after the short circuit when the lithium cell carries out safety verification, the pressure value and the voltage value that receive when noting the short circuit, compare with above data of taking notes, then can be quick find out what kind and the dust 11 of size appear in the lithium cell, then can arrange for the cleanness to raw and other materials. It is understood that the above steps may be repeated after changing the type or particle size of the dust 11, so as to measure the short circuit data of the lithium battery caused by different types or particle sizes of the dust 11 under different pressures or voltages. It will of course be appreciated that the type of dust 11 could also be plastic or dust.
In one embodiment, referring to fig. 3, step S150 includes:
s153, adjusting the voltage to a preset voltage value;
and S154, adjusting the pressure until the positive pole piece 8 and the negative pole piece 10 are short-circuited.
In a specific embodiment, for example, the provided dust 11 is a metal, the particle size is 32 mesh, the preset voltage value is 20V, the pressure value is adjusted by 1N each time until the positive electrode tab 8 and the negative electrode tab 10 are short-circuited, and the pressure value applied to the 32 mesh dust 11 during short-circuiting at the voltage value of 20V is recorded. Further, only the preset voltage value is changed, such as increased to 21V or decreased to 19V, until the positive electrode tab 8 and the negative electrode tab 10 are short-circuited, and the pressure value of the 32-mesh dust 11 at the voltage value of 21V or 19V at the time of short circuit is recorded. From this, if after the short circuit when the lithium cell carries out safety verification, the pressure value and the voltage value that receive when noting the short circuit, compare with above data of taking notes, then can be quick find out what kind and the dust 11 of size appear in the lithium cell, then can arrange for the cleanness to raw and other materials. It is understood that the above steps may be repeated after changing the type or particle size of the dust 11, so as to measure the short circuit data of the lithium battery caused by different types or particle sizes of the dust 11 under different pressures or voltages.
In one embodiment, referring to fig. 4, step S150 includes:
s155, adjusting the pressure to a preset pressure value, and adjusting the voltage to a preset voltage value;
and S156, synchronously regulating and increasing the pressure and the voltage until the positive pole piece 8 and the negative pole piece 10 are in short circuit.
In a specific embodiment, for example, the provided dust 11 is a metal, the particle size is 32 meshes, the preset voltage value is 20V, the preset pressure value is 20N, the pressure and the voltage are synchronously increased, 1V and 1N are increased each time until the positive electrode tab 8 and the negative electrode tab 10 are short-circuited, and the voltage value and the pressure value of the 32 meshes of dust 11 in the short-circuit are recorded. From this, if after the short circuit when the lithium cell carries out safety verification, the pressure and the voltage that receive when noting the short circuit, compare with above recorded data, then can be quick find out what kind and the dust 11 of size appear in the lithium cell, then can investigate clean raw and other materials. It is understood that the above steps may be repeated after changing the type or particle size of the dust 11, so as to measure the short circuit data of the lithium battery caused by different types or particle sizes of the dust 11 under different pressures or voltages.
Referring to fig. 5, the present invention further provides a detection apparatus for analyzing short circuit failure of a lithium battery, which uses the method as described above, and includes: the device comprises a first conductive pressing plate 1, a second conductive pressing plate 2 and a driving assembly 3, wherein the first conductive pressing plate 1 is used for being connected with a voltage-adjustable power supply; the second conductive pressing plate 2 is used for being connected with a power supply, and the second conductive pressing plate 2 is arranged opposite to the first conductive pressing plate 1; the driving assembly 3 is connected with the first conductive pressing plate 1 to drive the first conductive pressing plate 1 to move towards the second conductive pressing plate 2, wherein the driving force of the driving assembly 3 is adjustable to adjust the pressure between the first conductive plate and the second conductive plate.
Referring to fig. 5-6, the positive pole piece 8 of the lithium battery is placed on the second conductive pressing plate 2, the diaphragm 9 is placed on the positive pole piece 8, the negative pole piece 10 is placed on the diaphragm 9, the dust 11 to be analyzed is placed between the diaphragm 9 and the negative pole piece 10, further, the driving assembly 3 is started, the first conductive pressing plate 1 is pushed to move towards the second conductive pressing plate 2, the positive pole piece 8, the diaphragm 9, the dust 11 and the negative pole piece 10 are pressed tightly, the power supply connected with the first conductive pressing plate 1 and the second conductive pressing plate 2 through the lead 7 is started, and the driving force and the power supply voltage of the driving assembly 3 are adjusted until short circuit occurs. The dust 11 recorded under the analysis parameters causes the pressure value and the voltage value which are suffered when the positive pole piece 8 and the negative pole piece 10 are in short circuit. By repeating the above steps and changing a single parameter, such as the type or particle size of the dust 11, different data of the short circuit of the positive electrode plate 8 and the negative electrode plate 10 caused by the dust 11 with different analysis parameters can be detected. Therefore, in the safety verification of the lithium battery, the short circuit occurs under the condition that a certain voltage and a certain pressure are applied, and the dust 11 can be quickly found out by inquiring the recorded data and comparing the received conditions.
In one of the embodiments, referring to fig. 5, the drive assembly 3 comprises: the conductive pressing plate comprises an air cylinder 31 and a push rod 32, two ends of the push rod 32 are respectively connected with the air cylinder 31 and the first conductive pressing plate 1, and the push rod 32 is driven by the air cylinder 31 to push the first conductive pressing plate 1 to move towards the second conductive pressing plate 2. In the present embodiment, the provision of the cylinder 31 as the power source of the driving assembly 3 is more cost-effective than the use of a motor as the power source. The pressure of the cylinder 31 can be adjusted by directly adjusting the air pressure of the air pressure source connected to the cylinder 31. It will of course be appreciated that a motor may be provided as a power source for the drive assembly 3 if desired.
In one embodiment, referring to fig. 5, the device further comprises a bracket 4, wherein the bracket 4 comprises: a connecting plate 41, a first fixing plate 42 and a second fixing plate 43, the first fixing plate 42 being connected to the connecting plate 41; wherein, the cylinder 31 is installed on the first fixing plate 42, and the push rod 32 is connected with the first conductive pressing plate 1 after penetrating through the first fixing plate 42; the second fixing plate 43 is arranged opposite to the first conductive pressing plate 1, and the second fixing plate 43 is connected with the connecting plate 41; wherein, the second conductive pressing plate 2 is installed on the surface of the second fixing plate 43 opposite to the first conductive pressing plate 1. In this embodiment, the driving assembly 3, the first conductive pressing plate 1 and the second conductive pressing plate 2 can be fixed on the bracket 4, so that the whole device has better integrity and is convenient to move.
In one embodiment, see fig. 5, further comprises a first insulating plate 5 mounted between the push rod 32 and the first conductive platen 1. In the embodiment, in order to prevent the first conductive pressure plate 1 from conducting current to the cylinder 31 after being electrified and causing damage to the cylinder 31, and also to prevent the bracket 4 from being electrified and avoiding safety accidents, the first insulating plate 5 is provided. By providing the first insulating plate 5, only the first conductive pressure plate 1 itself can be electrically charged after being electrically energized.
In one embodiment, referring to fig. 5, a second insulating plate 6 is further included, which is mounted between the second fixing plate 43 and the second conductive pressure plate 2. In the specific embodiment, the second insulating plate 6 is arranged, so that only the second conductive pressure plate 2 is electrified after being electrified, and safety accidents are avoided.
In one of the embodiments, referring to fig. 5, the first and second conductive platens 1 and 2 are made of copper. In the specific embodiment, since copper is a material with high conductivity and cost performance, copper is selected to manufacture the first conductive pressing plate 1 and the second conductive pressing plate 2, so as to ensure the conductivity of the first conductive pressing plate 1 and the second conductive pressing plate 2.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (10)
1. A lithium battery short circuit failure analysis method is characterized by comprising the following steps:
providing dust and analysis parameters corresponding to the dust, wherein the analysis parameters comprise the type and the particle size of the dust;
sequentially stacking a positive pole piece, a diaphragm and a negative pole piece, wherein the dust is arranged between the positive pole piece and the diaphragm, or the dust is arranged between the negative pole piece and the diaphragm;
applying pressure to the positive pole piece and the negative pole piece to compress the positive pole piece and the negative pole piece;
providing voltage to the positive pole piece and the negative pole piece;
adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short-circuited;
and recording the corresponding pressure and voltage when the dust is short-circuited under the analysis parameters.
2. The lithium battery short circuit failure analysis method of claim 1, wherein the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short circuited comprises:
adjusting the pressure to a preset pressure value;
and increasing the voltage until the positive pole piece and the negative pole piece are short-circuited.
3. The lithium battery short circuit failure analysis method of claim 1, wherein the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short circuited comprises:
adjusting the voltage to a preset voltage value;
and adjusting the pressure until the positive pole piece and the negative pole piece are short-circuited.
4. The lithium battery short circuit failure analysis method of claim 1, wherein the adjusting the pressure and/or the voltage until the positive pole piece and the negative pole piece are short circuited comprises:
adjusting the pressure to a preset pressure value, and adjusting the voltage to a preset voltage value;
synchronously increasing the pressure and the voltage until the positive pole piece and the negative pole piece are short-circuited.
5. A detection device for short-circuit failure analysis of lithium batteries, characterized in that the method according to any of claims 1-4 is applied, which comprises:
the first conductive pressing plate is used for being connected with a voltage-adjustable power supply;
the second conductive pressing plate is used for being connected with the power supply, and the second conductive pressing plate is opposite to the first conductive pressing plate;
the driving assembly is connected with the first conductive pressing plate so as to drive the first conductive pressing plate to move towards the second conductive pressing plate, wherein the driving force of the driving assembly is adjustable so as to adjust the pressure between the first conductive plate and the second conductive plate.
6. The lithium battery short circuit failure analysis detection device as claimed in claim 5, wherein the driving assembly comprises:
a cylinder;
and two ends of the push rod are respectively connected with the air cylinder and the first conductive pressing plate, and the push rod is driven by the air cylinder to push the first conductive pressing plate to move towards the second conductive pressing plate.
7. The lithium battery short circuit failure analysis detection device of claim 6, further comprising a bracket comprising:
a connecting plate;
a first fixing plate connected to the connection plate; wherein the content of the first and second substances,
the cylinder is arranged on the first fixing plate, and the push rod penetrates through the first fixing plate and then is connected with the first conductive pressing plate;
the second fixing plate is arranged opposite to the first conductive pressing plate and connected with the connecting plate; wherein the content of the first and second substances,
the second conductive pressing plate is arranged on the surface of the second fixing plate opposite to the first conductive pressing plate.
8. The detection apparatus for analyzing short circuit failure of lithium battery as claimed in claim 7, wherein: the first insulating plate is installed between the push rod and the first conductive pressing plate.
9. The detection apparatus for analyzing short circuit failure of lithium battery as claimed in claim 8, wherein: and the second insulating plate is arranged between the second fixing plate and the second conductive pressing plate.
10. The detection device for analyzing short circuit failure of lithium battery as claimed in any one of claims 5 to 9, wherein: the first and second conductive platens are made of copper.
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