CN210294131U - Hot nail experimental equipment for testing heat resistance of lithium battery diaphragm - Google Patents
Hot nail experimental equipment for testing heat resistance of lithium battery diaphragm Download PDFInfo
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- CN210294131U CN210294131U CN201920937483.6U CN201920937483U CN210294131U CN 210294131 U CN210294131 U CN 210294131U CN 201920937483 U CN201920937483 U CN 201920937483U CN 210294131 U CN210294131 U CN 210294131U
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Abstract
The utility model relates to a hot nail experimental facility for testing the heat resistance of a lithium battery diaphragm, which comprises a facility control part, a mechanical transmission part, a hot nail part and a diaphragm clamp part; the mechanical transmission part and the hot nail part are connected to the equipment control part through leads, and the diaphragm clamp part is separately fixed on the horizontal baffle plate to directly fix the diaphragm. The utility model has the advantages that: the transmission device which vertically moves up and down is introduced into a hot nail experiment, the speed and the height of the hot nail close to the diaphragm are accurately controlled, the diaphragm can be locally and uniformly heated, and the heat resistance of the diaphragm is more reasonably analyzed.
Description
Technical Field
The utility model belongs to the technical field of the diaphragm test technique and specifically relates to a hot nail experimental facilities for testing lithium battery diaphragm heat resistance.
Background
With the development of science and technology, lithium ion batteries have been widely applied to 3C electronic devices and power automobiles, which rapidly drives the production of diaphragms, which are important constituent materials of lithium ion batteries. The diaphragm is used as one of four core materials in the lithium ion battery, and the performance of the diaphragm directly determines the interface structure, the internal resistance and the heat resistance of the battery, so that the electrical property and the safety performance of the battery are directly influenced. As is well known, the separator has the function of separating the positive electrode and the negative electrode of the battery to prevent the contact between the positive electrode and the negative electrode from causing safety problems, and the microporous structure of the separator can allow electrolyte ions to pass through.
The heat resistance of the diaphragm determines one of important factors of the safety of the lithium battery, so that the evaluation of the heat resistance of the diaphragm in the lithium battery in all aspects is important to the safety of the lithium battery. At present, the main method for testing the heat resistance of the lithium battery diaphragm is to place the diaphragm in a baking oven at a certain temperature and observe the dimensional change and the heat shrinkage performance of the diaphragm within a specific time, so as to judge the heat resistance of the diaphragm. The method can reflect the heat resistance of the diaphragm from a macroscopic view, but cannot accurately reflect the film breaking temperature and the heat resistance of the diaphragm when the diaphragm is locally heated, and the key data also relate to whether the lithium ion battery can avoid thermal runaway.
Therefore this application has designed a brand-new hot nail experimental apparatus for testing lithium ion battery diaphragm heat resistance, and this experimental apparatus adopts a diameter phi 3 mm's high temperature hot needle to be close the diaphragm to this rupture of membranes temperature and the rupture of membranes hole size of diaphragm of observing the diaphragm, the local heat resistance of research diaphragm, thereby the full aspect instructs lithium ion battery diaphragm production.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a hot nail experimental facilities for testing lithium battery diaphragm heat resistance.
The purpose of the utility model is realized through the following technical scheme:
a hot nail experimental facility for testing the heat resistance of a lithium battery diaphragm comprises a facility control part, a mechanical transmission part, a hot nail part and a diaphragm clamp part; the mechanical transmission part and the hot nail part are connected to the equipment control part through leads, and the diaphragm clamp part is separately fixed on the horizontal baffle plate to directly fix the diaphragm.
The device control part can set the hot nail lifting speed and the height of the approaching diaphragm so as to accurately control the movement of the hot nail. And the hot nail can be heated to a proper temperature through temperature control, so that the diaphragm is locally heated. The mechanical transmission part of the hot nail is realized through a ball screw linear module, the driving motor can control the sliding block to freely move up and down, and the height of the sliding block moving up and down can be accurately controlled, so that the hot nail can be guaranteed to locally and uniformly apply heat to the diaphragm. The hot nail part consists of a heating device capable of accurately controlling the temperature, the heating device is heated to a specific temperature, and when the hot nail is contacted with the diaphragm, the hot nail can be stably maintained at the temperature, so that the diaphragm can be uniformly heated. The diaphragm is fixed on the support frame to ensure the smoothness of the surface of the diaphragm, so that the diaphragm can be uniformly heated. And (3) continuously heating the diaphragm for 10s, changing the surface of the diaphragm, upwards removing the hot nail, taking down the diaphragm, and carrying out surface morphology analysis on the diaphragm so as to judge the heat resistance of the diaphragm.
The structure diagram of the control part of the equipment comprises four knobs which are respectively a speed knob for controlling the movement of the hot nails, a distance knob for the hot nails and the membrane fixture, a heating temperature knob for the hot nails and an equipment switch knob, and four display screens corresponding to the speed, the distance, the heating temperature and the display temperature. This hot nail experiment is through the speed and the hot nail actual temperature that controlgear adjusted the hot nail and goes up and down to this controlgear can also control the lift height of slider, and the hot nail can hover apart from the suitable position of diaphragm with this assurance, with the normal clear of assurance experiment.
The hot nail device comprises a resistance wire and a thermocouple capable of controlling the temperature of the resistance wire in a feedback mode, and the thermocouple is tightly fixed at the bottom end of the resistance wire. The hot nail experimental equipment controls the temperature through a heating device, the diameter of the heating device is phi 2cm, the total length of the heating device is 23cm, the hot nail is arranged at the foremost end of the heating device, and the length of the hot nail part is 7 cm. The heating device heats through the thermal resistance wire, the highest heating temperature of the heating device can reach 450 ℃, and the temperature of the resistance wire is monitored in real time through the thermocouple, so that the temperature of the hot nail is accurately controlled.
The mechanical transmission part comprises a vertical baffle, a horizontal baffle and a ball screw linear module; the vertical baffle and the horizontal baffle are fixed through screws, the ball screw linear module is also fixed on the vertical baffle and the horizontal baffle through screws, an L-shaped steel sheet is fixed on the ball screw linear module, and the part of the structure is a mechanical transmission part.
The hot nail experimental equipment adopts a ball screw linear module as a transmission device, and the ball screw linear module comprises a driving motor, a slide block, a slide rail and a shell; the driving motor is connected with the sliding rail, and the sliding block is arranged on the sliding rail; the housing is a semi-enclosed structure in which the slide rails and the slide blocks are secured.
The overall height of the module is 50cm, the outer diameter is 6cm, the length of the slide rail is 40cm, and the diameter of the slide rail is phi 2 cm. Through the driving motor, the slide rail is driven to rotate, so that the slide block can move up and down.
A diaphragm clamp portion including a diaphragm and a support frame on which the diaphragm is fixed. The height of the support frame is 4cm, the width of the support frame is 8cm, and the diaphragm is suspended and fixed on the two support frames, so that the flatness of the diaphragm is guaranteed, and the diaphragm can be heated without obstruction.
Compared with the prior art, the utility model has the positive effects that:
the transmission device which vertically moves up and down is introduced into a hot nail experiment, the speed and the height of the hot nail close to the diaphragm are accurately controlled, the diaphragm can be locally and uniformly heated, and the heat resistance of the diaphragm is more reasonably analyzed.
Drawings
FIG. 1 is a block diagram of a hot-tack experimental setup;
FIG. 2 is a view showing a structure of a control section of the apparatus;
FIG. 3 is a schematic view of a hot-nailing device;
FIG. 4 is a view showing a structure of a ball screw linear module;
FIG. 5 is a diagram of a diaphragm clamp configuration;
the labels in the figures are:
1 a control section of the apparatus for controlling,
2, a mechanical transmission part is arranged on the frame,
3, hot-nailing the parts of the nail,
4 a portion of the diaphragm clamp, and,
a 5L-shaped steel sheet is arranged on the upper portion of the steel sheet,
6 is vertical to the baffle plate, and the baffle plate is vertical to the baffle plate,
7 a horizontal baffle plate is arranged on the upper surface of the frame,
8, a speed knob is arranged on the front end of the speed knob,
9 the distance between the two rotary knobs is less than the distance,
10 the temperature of the mixture is heated up,
the temperature is shown at 11 and is displayed,
12 resistance wires are arranged on the outer side of the electric wire,
13 a thermocouple;
14 to drive the motor, and the motor is driven,
15 a slide block is arranged on the upper surface of the sliding block,
16 of the slide rails are arranged in the sliding way,
17 the outer shell of the air conditioner is provided with a shell,
18 a membrane of a plurality of membranes, and,
19 supporting the frame.
Detailed Description
The following provides the utility model relates to a concrete implementation mode of hot nail experimental facilities for testing lithium battery diaphragm heat resistance.
Example 1
A hot nail experimental facility for testing the heat resistance of a lithium battery diaphragm comprises a facility control part 1, a mechanical transmission part 2, a hot nail part 3 and a diaphragm clamp part 4; the mechanical transmission part and the hot nail part are connected to the equipment control part through leads, and the diaphragm clamp part is separately fixed on the horizontal baffle plate to directly fix the diaphragm.
The device control part can set the hot nail lifting speed and the height of the approaching diaphragm so as to accurately control the movement of the hot nail. And the hot nail can be heated to a proper temperature through temperature control, so that the diaphragm is locally heated. The mechanical transmission part of the hot nail is realized through a ball screw linear module, the driving motor can control the sliding block to freely move up and down, and the height of the sliding block moving up and down can be accurately controlled, so that the hot nail can be guaranteed to locally and uniformly apply heat to the diaphragm. The hot nail part consists of a heating device capable of accurately controlling the temperature, the heating device is heated to a specific temperature, and when the hot nail is contacted with the diaphragm, the hot nail can be stably maintained at the temperature, so that the diaphragm can be uniformly heated. The diaphragm is fixed on the support frame to ensure the smoothness of the surface of the diaphragm, so that the diaphragm can be uniformly heated. And (3) continuously heating the diaphragm for 10s, changing the surface of the diaphragm, upwards removing the hot nail, taking down the diaphragm, and carrying out surface morphology analysis on the diaphragm so as to judge the heat resistance of the diaphragm.
The structure diagram of the control part of the equipment comprises four knobs which are respectively a speed knob 8 for controlling the movement of the hot nails, a distance knob 9 for the hot nails and the membrane fixture, a heating temperature knob of the hot nails and an equipment switch knob, and four display screens corresponding to the speed, the distance, the heating temperature 10 and the display temperature 11. This hot nail experiment is through the speed and the hot nail actual temperature that controlgear adjusted the hot nail and goes up and down to this controlgear can also control the lift height of slider, and the hot nail can hover apart from the suitable position of diaphragm with this assurance, with the normal clear of assurance experiment.
The hot nail device comprises a resistance wire and a thermocouple capable of controlling the temperature of the resistance wire in a feedback mode, and the thermocouple 13 is tightly fixed at the bottom end of the resistance wire 12. The hot nail experimental equipment controls the temperature through a heating device, the diameter of the heating device is phi 2cm, the total length of the heating device is 23cm, the hot nail is arranged at the foremost end of the heating device, and the length of the hot nail part is 7 cm. The heating device heats through the thermal resistance wire, the highest heating temperature of the heating device can reach 450 ℃, and the temperature of the resistance wire is monitored in real time through the thermocouple, so that the temperature of the hot nail is accurately controlled.
The mechanical transmission part comprises a vertical baffle, a horizontal baffle and a ball screw linear module; the vertical baffle 6 and the horizontal baffle 7 are fixed through screws, the ball screw linear module is also fixed on the vertical baffle and the horizontal baffle through screws, and an L-shaped steel sheet 5 is fixed on the ball screw linear module, and the part of the structure is a mechanical transmission part.
The hot-nailing experimental equipment adopts a ball screw linear module as a transmission device, and the ball screw linear module comprises a driving motor 14, a slide block 15, a slide rail 16 and a shell 17; the driving motor is connected with the sliding rail, and the sliding block is arranged on the sliding rail; the housing is a semi-enclosed structure in which the slide rails and the slide blocks are secured.
The overall height of the module is 50cm, the outer diameter is 6cm, the length of the slide rail is 40cm, and the diameter of the slide rail is phi 2 cm. Through the driving motor, the slide rail is driven to rotate, so that the slide block can move up and down.
A diaphragm clamp portion comprising a diaphragm 18 and a support 19 to which the diaphragm is secured. The height of the support frame is 4cm, the width of the support frame is 8cm, and the diaphragm is suspended and fixed on the two support frames, so that the flatness of the diaphragm is guaranteed, and the diaphragm can be heated without obstruction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as within the protection scope of the present invention.
Claims (5)
1. A hot nail experimental facility for testing the heat resistance of a lithium battery diaphragm is characterized by comprising a facility control part, a mechanical transmission part, a hot nail part and a diaphragm clamp part; the mechanical transmission part and the hot nail part are connected to the equipment control part through leads, and the diaphragm clamp part is separately fixed on the horizontal baffle plate to directly fix the diaphragm.
2. The hot-nailing experimental facility for testing the heat resistance of the lithium battery diaphragm as claimed in claim 1, wherein the hot-nailing device comprises a resistance wire and a thermocouple capable of controlling the temperature of the resistance wire in a feedback manner, and the thermocouple is tightly fixed at the bottom end of the resistance wire.
3. The hot-nail experimental apparatus for testing heat resistance of the lithium battery separator according to claim 1, wherein the mechanical transmission part comprises a vertical baffle and a horizontal baffle, a ball screw linear module; the vertical baffle and the horizontal baffle are fixed through screws, the ball screw linear module is also fixed on the vertical baffle and the horizontal baffle through screws, and an L-shaped steel sheet is fixed on the ball screw linear module.
4. The hot-nail experimental equipment for testing the heat resistance of the lithium battery diaphragm as claimed in claim 3, wherein the ball screw linear module comprises a driving motor, a slide block, a slide rail and a shell; the driving motor is connected with the sliding rail, and the sliding block is arranged on the sliding rail; the housing is a semi-enclosed structure in which the slide rails and the slide blocks are secured.
5. The hot-nailing experimental facility for testing heat resistance of a lithium battery separator as claimed in claim 1, wherein the separator jig part comprises a separator and a support frame, the separator being fixed to the support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937483.6U CN210294131U (en) | 2019-06-21 | 2019-06-21 | Hot nail experimental equipment for testing heat resistance of lithium battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937483.6U CN210294131U (en) | 2019-06-21 | 2019-06-21 | Hot nail experimental equipment for testing heat resistance of lithium battery diaphragm |
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| Publication Number | Publication Date |
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| CN210294131U true CN210294131U (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920937483.6U Active CN210294131U (en) | 2019-06-21 | 2019-06-21 | Hot nail experimental equipment for testing heat resistance of lithium battery diaphragm |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626091A (en) * | 2023-07-21 | 2023-08-22 | 江苏德励达新材料股份有限公司 | Polyurethane material heat-resistant detection device |
| EP4105620A4 (en) * | 2020-12-17 | 2023-10-04 | LG Energy Solution, Ltd. | Device and method for evaluating heat resistance properties of separator |
-
2019
- 2019-06-21 CN CN201920937483.6U patent/CN210294131U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4105620A4 (en) * | 2020-12-17 | 2023-10-04 | LG Energy Solution, Ltd. | Device and method for evaluating heat resistance properties of separator |
| CN116626091A (en) * | 2023-07-21 | 2023-08-22 | 江苏德励达新材料股份有限公司 | Polyurethane material heat-resistant detection device |
| CN116626091B (en) * | 2023-07-21 | 2023-09-29 | 江苏德励达新材料股份有限公司 | Polyurethane material heat-resistant detection device |
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