CN211122308U - Battery diaphragm tensile strength detection device - Google Patents
Battery diaphragm tensile strength detection device Download PDFInfo
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- CN211122308U CN211122308U CN201921880268.3U CN201921880268U CN211122308U CN 211122308 U CN211122308 U CN 211122308U CN 201921880268 U CN201921880268 U CN 201921880268U CN 211122308 U CN211122308 U CN 211122308U
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Abstract
The utility model provides a battery diaphragm tensile strength detection device, which comprises a clamping end and a testing end which respectively clamp and fix two ends of a battery diaphragm to be tested, and a pushing component; the pushing component is abutted against the middle part of the battery diaphragm to be tested, so that the battery diaphragm to be tested is bent, and the cross sections of the two end parts are in an acute angle shape. The middle of pushing against the battery diaphragm through the pushing assembly enables the battery diaphragm to be bent, the cross sections of the two end parts are acute-angled, so that the battery diaphragm is not easy to wrinkle and is smoother, the uniform distribution of the stretching force to the battery diaphragm is realized, and the battery diaphragm is prevented from being broken due to local stress, so that the tension sensor can acquire accurate and reliable measurement data, and the measurement precision is improved.
Description
Technical Field
The utility model relates to a battery technology field especially provides a battery diaphragm tensile strength detection device.
Background
The lithium ion battery consists of a positive electrode, a negative electrode, a diaphragm, electrolyte and a shell. The diaphragm has the function of separating the positive and negative pole pieces in the battery and preventing the positive and negative pole pieces from being in direct contact to generate short circuit, and meanwhile, because the diaphragm is provided with a large number of tortuous and through micropores, lithium ions in the battery can freely pass through the micropores, and migrate between the positive and negative pole pieces to form an internal conductive loop, while electrons migrate between the positive and negative pole pieces through an external loop to form current for electric equipment. The diaphragm has a key influence on the electrical property and the safety performance of the lithium ion battery, and general diaphragm incoming material test items have indexes such as thickness, aperture, closed pore temperature, air permeability, liquid absorption rate, puncture strength, tensile strength, chemical stability and the like.
The tensile strength reflects the tensile mechanical strength of the diaphragm, and the diaphragm with high tensile strength is not easily stretched and deformed in the battery manufacturing process and the battery using process, so that the safety performance of the battery is greatly influenced.
Currently, a linear tension meter is generally used for testing the tensile strength of the diaphragm, namely, the diaphragm is cut into standard widths, one end of the fixed end clamp is clamped at the bottom of the tension meter, the other end of the fixed end clamp is clamped on a push-pull force meter clamp, the diaphragm is pulled off along with the push-pull force meter moving upwards on a force column, and the push-pull force meter obtains the tensile strength of the diaphragm according to the maximum tension reading. The specific process is as follows:
1) Cutting the diaphragm sample according to the width, wherein the width is generally 15-30 mm;
2) Opening a power switch of a test board of the tensile machine to confirm that the machine is normal;
3) Setting corresponding parameters, and testing the speed at 300 mm/min;
4) And clamping the prepared diaphragm sample on a push-pull machine clamp, clamping the other side of the diaphragm sample on a bottom fixed end clamp, and confirming that the sample and the upper and lower clamp surfaces are vertical to the same central line, otherwise, readjusting and fixing.
5) And starting a tension test, moving the push-pull dynamometer upwards, and reading the maximum tension value during the tension test after the diaphragm is broken.
However, the diaphragms used by the lithium ion batteries are extremely thin, the thickness of the diaphragms is generally between 5 and 30 micrometers, and in addition, the diaphragms are made of PP or PE and are porous, so the diaphragms are extremely soft, and the diaphragms are very easy to wrinkle in the process of stretching the diaphragms by using a linear tension meter, so that the tension is very unevenly distributed on the cross sections of the diaphragms, and the precision of tension value tests when the diaphragms break is influenced.
In addition, in the actual use process of the lithium ion battery, the temperature rise caused by the high temperature of the environment and the heat generated by the charging and discharging of the battery has certain influence on the tensile strength of the diaphragm, and the existing testing method can only test the tensile strength of the diaphragm at normal temperature and cannot test the tensile force at high temperature.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art or the correlation technique.
The utility model discloses an one of them purpose is, provides a battery diaphragm tensile strength detection device, is revised as the test mode of broken line formula to the tensile test mode of diaphragm material orthoscopic among the prior art, has not only solved among the prior art battery diaphragm and has produced the fold easily and lead to the unsafe technical problem of tensile strength measuring result in the test process, further simulates the operating mode among the in-service use moreover, makes the test result more true and reliable.
The utility model discloses the technological effect that will reach is realized through following scheme:
The utility model provides a battery diaphragm tensile strength detection device, which comprises a clamping end and a testing end which respectively clamp and fix two ends of a battery diaphragm to be tested, and a pushing component; the pushing assembly is abutted against the middle part of the battery diaphragm to be tested, so that the battery diaphragm to be tested is bent, and the cross sections of the two end parts are in an acute angle shape.
Through adopting above-mentioned scheme, the top pushes away the subassembly and supports the centre of propping the battery diaphragm, makes the battery diaphragm take place to support curved, both ends cross-section is the acute angle shape, and the difficult cockling of battery diaphragm like this is more level and smooth, has realized with tensile force evenly distributed to battery diaphragm everywhere to avoid the battery diaphragm to take place to split because of local atress, be favorable to the test end to acquire accurate reliable measured data, improve measurement accuracy.
In one embodiment, the pushing assembly comprises a bracket and a roller mounted on the top end of the bracket, wherein one side of the outer surface of the roller abuts against the middle part of the battery diaphragm.
Through adopting above-mentioned scheme, the gyro wheel tightly supports battery diaphragm for battery diaphragm is in the state of tensioning, can straighten out the battery diaphragm that is located pulley both sides, thereby makes the difficult fold that produces of battery diaphragm.
In one embodiment, the rollers have a diameter in the range of 50mm to 100 mm.
By adopting the scheme, in the stretching process of the battery diaphragm, the contact part of the battery diaphragm and the roller forms smooth transition, so that the battery diaphragm is not easy to wrinkle
In one embodiment, the roller is provided with at least one heating assembly, and the heating assembly is positioned on the inner side wall of the roller.
By adopting the scheme, the battery diaphragm can be heated by the heating assembly before the tensile strength of the battery diaphragm is tested, and the tensile strength of the battery diaphragm at different temperatures is measured.
In one embodiment, the heating assembly is a plurality of heating assemblies, and the plurality of heating assemblies are distributed at intervals along the peripheral side of the inner side wall of the roller.
Through adopting above-mentioned scheme, be equipped with a plurality of heating element at the gyro wheel, be favorable to accelerating the temperature rise rate of battery diaphragm, shorten measuring time.
In one embodiment, the device for detecting the tensile strength of the battery diaphragm further comprises a frame, the frame comprises a base, a force column vertically installed on the base and a supporting box horizontally installed on the force column, the clamping end is installed at one end, far away from the force column, of the base, the pushing assembly is arranged in the middle of the base, and the testing end is slidably installed on the supporting box.
By adopting the scheme, the testing end is arranged above the base, and the clamping end is arranged on the base, so that the battery diaphragm is ensured to have a long enough stretching path, the matching between the components is more compact, and the space utilization rate is improved.
In one embodiment, the supporting box is provided with a fixed seat in a sliding way, and the testing end is arranged on the fixed seat.
By adopting the above scheme, when installing the test end on the fixing base, promote the fixed seat just and can drive the test end and remove, simple structure, it is easy and simple to handle, and the installation of the test end of being convenient for.
In one embodiment, the testing end comprises a push-pull force gauge fixed on the fixed seat.
Through adopting above-mentioned scheme, use the tensile strength of push-pull dynamometer measurement battery diaphragm, its simple structure, the simple operation, and practice thrift the cost.
In one embodiment, the test end further comprises a moving structure, the moving structure is mounted on the support box, and the moving structure is connected with the push-pull force meter to push the push-pull force meter to move in a direction away from the clamping end.
By adopting the scheme, when the battery diaphragm needs to be stretched, the moving structure can drive the push-pull dynamometer to move stably so as to avoid the influence on the result caused by the too high stretching speed.
In one embodiment, the battery separator tensile strength detection device further comprises an operation panel, and the operation panel is electrically connected with the test end.
By adopting the scheme, the working condition of the test end is controlled through the operation panel, and the measured value is obtained in real time, so that the operation is convenient and fast.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced 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 inventive labor.
Fig. 1 is a schematic structural diagram of a device for detecting tensile strength of a battery separator according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of an operation panel provided in an embodiment of the present invention.
Wherein, in the drawings, the reference numerals are mainly as follows:
100-a battery separator tensile strength detection device;
1-a battery separator;
2-a clamping end;
3-a test end; 31-a push-pull dynamometer;
4-a pushing assembly; 41-a roller; 42-a scaffold;
5-a frame; 51-a base; 52-force column; 53-a support box; 54-a fixed seat;
6-an operation panel; 61-display panel.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
According to an embodiment of the present invention, a device 100 for detecting tensile strength of a battery separator is provided, please refer to fig. 1. The battery diaphragm tensile strength detection device 100 comprises a clamping end 2 and a testing end 3, wherein the clamping end 2 and the testing end 3 respectively clamp and fix two ends of a battery diaphragm 1 to be tested. Specifically, the test terminal 3 and the clamping terminal 2 are simultaneously moved in opposite directions or the test terminal 3 is slid in a direction away from the clamping terminal 2 to stretch the battery separator 1. The holding end 2 may be a holder of a fixed frame, a spring clip or a claw, and the testing end 3 is a device capable of holding an object and measuring a pulling force, such as a pulling force sensor or a push-pull force meter 31. When the push-pull dynamometer 31 is used, the push-pull dynamometer 31 clamps one end of the battery diaphragm 1 and moves towards the direction far away from the clamping end 2 to gradually stretch the battery diaphragm 1, and at the moment, the push-pull dynamometer 31 can acquire the stretching force of the battery diaphragm 1 in real time and obtain the stretching strength of the battery diaphragm 1 according to the maximum stretching force when the battery diaphragm 1 breaks.
The battery separator tensile strength detection device 100 further comprises a pushing assembly 4. Wherein, push away subassembly 4 and support against the middle part of battery diaphragm 1 for battery diaphragm 1 takes place to support and bends, and battery diaphragm 1 both ends cross-section is the acute angle shape. From this, tightly support the middle part of battery diaphragm 1 through top pushing assembly 4, make battery diaphragm 1 expand uniformly, can prevent that battery diaphragm 1 from producing the problem of fold to make battery diaphragm 1's surface keep level and smooth, realized tensile force evenly distributed to battery diaphragm 1 everywhere, thereby avoid battery diaphragm 1 because of local atress emergence fracture, be favorable to test end 3 to obtain accurate reliable measured data, improve measurement accuracy, and this simple structure, the simple operation.
According to the utility model discloses battery diaphragm tensile strength detection device 100 through being provided with foretell exposed core 2, test end 3 and top push subassembly 4, can realize distributing the tensile force to battery diaphragm 1 everywhere uniformly well in the tensile process of battery diaphragm 1 to avoid battery diaphragm 1 to produce measuring error's problem because of each atress emergence fracture, improve the measuring accuracy effectively.
According to some embodiments of the utility model, as shown in fig. 1, top pushes away subassembly 4 and includes support 42 and gyro wheel 41, gyro wheel 41 is installed on support 42 top, one side of gyro wheel 41 surface is supported and is being held the middle part of battery diaphragm 1, make battery diaphragm 1 be in the state of tensioning, can be with being located the battery diaphragm 1 of gyro wheel 41 both sides and straighten, thereby make battery diaphragm 1 be difficult for producing the fold, tensile force evenly distributed to each department of diaphragm has been realized, and then avoid battery diaphragm 1 to take place the problem that the fracture influences the measuring result because of local atress, be favorable to test end 3 to acquire accurate reliable measured data, improve measurement accuracy.
Specifically, the diameter of the roller 41 ranges from 50mm to 100 mm. Therefore, the diameter d of the roller 41 is larger than or equal to 50mm and smaller than or equal to 100m, so that smooth transition at the transition position of the battery diaphragm 1 and the pushing assembly 4 can be ensured, meanwhile, the contact area between the battery diaphragm 1 and the pushing assembly 4 is large, and the pressure of the pushing assembly 4 is favorably and uniformly dispersed to all positions of the battery diaphragm 1.
In one embodiment, referring to fig. 1, the roller 41 is provided with at least one heating element (not shown) located on the inner sidewall of the roller 41. Wherein the heating component can be heating elements such as a heating rod, a heating wire and the like. Therefore, the heating assembly heats the battery diaphragm 1, and the tensile property of the battery diaphragm 1 at different temperatures is measured.
The material characteristics of the battery diaphragm 1 show that the battery diaphragm 1 generally does not have obvious thermal shrinkage below 80 ℃, and can have thermal shrinkage of different degrees but does not have closed pores when heated for a certain time at 80-130 ℃; at 130 c to 150 c the membrane will close the pores and melt at higher temperatures. The heating temperature of the heating assembly to the battery separator 1 does not exceed 80 ℃ based on the characteristics of the battery separator 1 and the operating temperature of the battery, and optionally, the heating temperature is 25 ℃, 40 ℃, 60 ℃ and 80 ℃ at normal temperature. In this embodiment, the roller 41 abuts against the middle of the battery diaphragm 1, and the heating assembly is arranged on the inner side wall of the roller 41, and the characteristics of mechanics show that the middle of the material is easy to break in stretching, so that the contact part of the battery diaphragm 1 and the roller 41 is easy to break, and the heating assembly can heat the contact part of the battery diaphragm 1 and the roller 41, thereby ensuring that the battery diaphragm 1 can be tested in a simulated battery charging and discharging environment, omitting the process of integrally heating the battery diaphragm 1, and having simple structure and convenient operation. In addition, the heating assembly is arranged on the inner side wall of the roller 41, so that heat of the heating assembly is directly transferred to the battery diaphragm 1 through the roller 41, the heat transfer path is shortened, and the heat transfer efficiency is effectively improved. In order to further improve the heat transfer efficiency, in the present embodiment, the roller 41 is made of a material with good thermal conductivity, such as copper, aluminum, iron, and the like.
Specifically, the number of the heating assemblies is multiple, and the multiple heating assemblies are distributed at intervals along the peripheral side of the inner side wall of the roller 41, so that the temperature rise rate of the battery separator 1 is accelerated.
In one embodiment, referring to fig. 1, the battery separator tensile strength testing apparatus 100 further includes a support 5. Specifically, the stand 5 includes a base 51, a force column 52, and a support box 53. The force column 52 is vertically mounted on the base 51, and the support box 53 is horizontally mounted on the force column 52. Wherein, the holding end 2 is installed at one end of the base 51 far away from the force column 52, the pushing component 4 is arranged at the middle part of the base 51, and the testing end 3 is slidably installed on the supporting box 53. Therefore, the testing end 3 is arranged above the base 51, and the clamping end 2 is arranged on the base 51, so that the battery diaphragm 1 is ensured to have a sufficiently long tensile path, the matching among the components is more compact, the space utilization rate is improved, and the battery diaphragm tensile strength detection device 100 is convenient to be arranged in a miniaturized manner.
According to some embodiments of the present invention, the supporting box 53 has a fixing seat 54 slidably mounted thereon, and the testing terminal 3 is mounted on the fixing seat 54. From this, when installing test end 3 on fixing base 54, promote fixing base 54 and just can drive test end 3 and remove, this simple structure, it is easy and simple to handle, and be convenient for test end 3's installation.
In one embodiment, referring to fig. 1, the testing end 3 includes a push-pull force gauge 31, a fixing seat 54 is slidably mounted on the supporting box 53, and the push-pull force gauge 31 is mounted on the fixing seat 54 to facilitate the installation of the push-pull force gauge 31. In addition, the push-pull dynamometer 31 is used as the test terminal 3, and is simple in structure and convenient to operate.
In one embodiment, referring to fig. 1, the testing end 3 further includes a moving structure (not shown) connected to the push-pull force gauge 31, such that the moving structure can drive the push-pull force gauge 31 to move smoothly in a direction away from the clamping end 2, thereby preventing the result from being influenced by too fast stretching speed.
Specifically, the moving structure includes a guide rail (not shown) provided on the support box 53, a fixing seat 54 slidably mounted on the guide rail, and a rotating rod (not shown) slidably inserted into the fixing seat 54 so that the fixing seat 54 can support the rotating rod, and the testing terminal 3 is mounted at one end of the rotating rod and clamps the battery separator 1. So, test end 3 moves towards the direction of keeping away from exposed core 2 along the guide rail when the swing arm rotates to tensile battery diaphragm 1, and test end 3 alright with the real-time tensile force of measuring battery diaphragm 1, and obtain the tensile strength of battery diaphragm 1 according to the biggest tensile force when battery diaphragm 1 breaks, this simple structure, small, the operation of being convenient for. In addition, the moving structure further comprises a motor (not shown), the motor is fixed on the frame 5 and connected with the rotary rod, so that the rotary rod is driven by the motor to rotate, the testing end 3 is pushed to move towards the direction away from the clamping end 2, the battery diaphragm 1 is further stretched, and the operation is convenient. In the implementation, the moving speed and the moving distance of the testing end 3 can be controlled by controlling the rotating speed and the rotating number of turns of the motor, so that the stretching speed of the battery diaphragm 1 is indirectly regulated and controlled, and the condition that the stretching speed is too fast to influence the result is avoided.
In addition, the moving mechanism may also be a screw and nut mechanism, a rack and pinion mechanism, a pulling mechanism, or other linear moving mechanisms, which is not limited herein.
In an embodiment, referring to fig. 2, the battery separator tensile strength detection apparatus 100 further includes an operation panel 6, the operation panel 6 is electrically connected to the test terminal 3, wherein the operation panel 6 is provided with a power-on key, a power-off key, a control key, and the like, so that the operation panel 6 can control the working condition of the test terminal 3 and implement to obtain the measurement data of the test terminal 3, and the operation is convenient.
In other embodiments, the battery separator tensile strength detection apparatus 100 further includes a display panel 61, and the display panel 61 is disposed on the operation panel 6, so that the display panel 61 can detect the tensile force measured by the terminal 3, and the measurement data can be displayed to an operator visually, so that the operator can know the tensile strength of the battery separator 1 quickly, and the operation is convenient.
Compared with the prior art, this battery diaphragm tensile strength detection device 1 makes battery diaphragm 4 take place to support the bending, both ends cross-section is the acute angle shape through being provided with top pushing assembly 4, modifies the tensile test mode of diaphragm material orthoscopic among the with prior art into the test mode of broken line formula, has not only solved among the prior art battery diaphragm 1 and has produced the fold easily and lead to the inaccurate technical problem of tensile strength measuring result in the test process. And, be equipped with heating element on gyro wheel 41 to heating battery diaphragm 1, further simulate the operating mode in the in-service use, make the test result more true and reliable.
Specifically, referring to fig. 1 and 2, the process of the tensile strength test of the battery separator 1 using the battery separator tensile strength testing apparatus 100 is as follows:
S1, cutting the battery diaphragm 1 into a sample battery diaphragm and marking;
S2, opening a power switch of the battery diaphragm tensile strength detection device 100 on the operation panel 6 to confirm that the machine is normal;
S3: setting the heating temperature of the roller 41 and setting the testing speed of the testing end 3 to be 300 mm/min;
S4: clamping one end of the prepared sample battery diaphragm on the testing end 3, clamping the other end of the prepared sample battery diaphragm on the clamping end 2, and confirming that the plane of the sample battery diaphragm is basically parallel to the clamping end 2 or the surface of the clamping end 2;
S5: the roller 41 is heated to a set temperature by the heating assembly, the heat conduction to the sample battery diaphragm is more than 3min, and the temperature of the sample battery diaphragm is balanced;
S6: the tensile test is started and the test end 3 is moved at a speed of 300mm/min in a direction away from the clamping end 2 until the membrane is snapped off, and the maximum tensile value at snap-off is recorded.
S7: and after the test is finished, recording data, resetting the test end 3, taking down the battery diaphragm 1 and shutting down.
Specifically, cutting 16 sample battery diaphragms according to the standard of 30mm in width and 200mm in length of the battery diaphragm 1, and marking 1# \2# -16 #; then, 16 test specimens were divided into four groups in order. Wherein the test temperature of the first group is 25 ℃, the test temperature of the second group is 40 ℃, the test temperature of the third group is 60 ℃, and the test temperature of the fourth group is 80 ℃.
As shown in table 1, it can be seen that: the tensile strength of the battery separator 1 at 25 ℃ and 40 ℃ did not change much, the tensile strength of the battery separator 1 at 60 ℃ was significantly reduced, and the tensile strength of the battery separator 1 at 80 ℃ was reduced very quickly and was less consistent and more dispersed. Through the test method, the change of the tensile strength of different battery diaphragms 1 at different temperatures can be evaluated, and the performance evaluation of the battery diaphragms 1 is more comprehensive and reasonable.
TABLE 1
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A battery diaphragm tensile strength detection device comprises a clamping end and a testing end which are used for clamping and fixing two ends of a battery diaphragm to be tested respectively, and is characterized by also comprising a pushing assembly; the pushing assembly is abutted against the middle part of the battery diaphragm to be tested, so that the battery diaphragm to be tested is bent, and the cross sections of the two end parts are in an acute angle shape.
2. The device for detecting the tensile strength of the battery diaphragm as claimed in claim 1, wherein the pushing assembly comprises a bracket and a roller mounted at the top end of the bracket, and one side of the outer surface of the roller abuts against the middle part of the battery diaphragm.
3. The apparatus for testing tensile strength of battery separator according to claim 2, wherein the diameter of the roller is in the range of 50mm to 100 mm.
4. The apparatus for testing tensile strength of battery separator according to claim 2, wherein said roller is provided with at least one heating element, and said heating element is located on the inner side wall of said roller.
5. The apparatus for testing tensile strength of battery separator according to claim 4, wherein said heating means is plural, and said plural heating means are spaced along the peripheral side of the inner side wall of said roller.
6. The device for detecting the tensile strength of the battery separator according to claim 1, wherein the device further comprises a frame, the frame comprises a base, a force column vertically installed on the base, and a supporting box horizontally installed on the force column, the clamping end is installed at one end of the base far away from the force column, the pushing assembly is arranged in the middle of the base, and the testing end is slidably installed on the supporting box.
7. The device for detecting the tensile strength of the battery separator as claimed in claim 6, wherein a fixing seat is slidably mounted on the supporting box, and the testing end is mounted on the fixing seat.
8. The device for testing the tensile strength of a battery diaphragm of claim 7, wherein the testing end comprises a push-pull force gauge, and the push-pull force gauge is fixed on the fixed seat.
9. The battery separator tensile strength testing apparatus of claim 8, wherein said testing end further comprises a moving structure, said moving structure is mounted on said support box, and said moving structure is connected to said push-pull force gauge to push said push-pull force gauge to move in a direction away from said clamping end.
10. The battery separator tensile strength testing apparatus of any one of claims 1-9, further comprising an operation panel, wherein the operation panel is electrically connected to the test terminal.
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| CN201921880268.3U CN211122308U (en) | 2019-10-31 | 2019-10-31 | Battery diaphragm tensile strength detection device |
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| CN201921880268.3U CN211122308U (en) | 2019-10-31 | 2019-10-31 | Battery diaphragm tensile strength detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611634A (en) * | 2020-12-18 | 2021-04-06 | 联动天翼新能源有限公司 | Pole piece fracture evaluation method at positive tab of cylindrical lithium battery |
| CN114659901A (en) * | 2020-12-23 | 2022-06-24 | 襄阳惠强新能源材料科技有限公司 | Tensile strength detection device for lithium battery diaphragm |
| CN114813408A (en) * | 2022-04-19 | 2022-07-29 | 吉林大学 | Battery diaphragm force-thermal-electric coupling in-situ test system under actual working condition |
-
2019
- 2019-10-31 CN CN201921880268.3U patent/CN211122308U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611634A (en) * | 2020-12-18 | 2021-04-06 | 联动天翼新能源有限公司 | Pole piece fracture evaluation method at positive tab of cylindrical lithium battery |
| CN114659901A (en) * | 2020-12-23 | 2022-06-24 | 襄阳惠强新能源材料科技有限公司 | Tensile strength detection device for lithium battery diaphragm |
| CN114813408A (en) * | 2022-04-19 | 2022-07-29 | 吉林大学 | Battery diaphragm force-thermal-electric coupling in-situ test system under actual working condition |
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