Diaphragm testing device and testing system

Abstract

The utility model provides a diaphragm testing device and a testing system, and relates to the technical field of battery diaphragm testing, and the diaphragm testing device comprises a transmission assembly and a plurality of testing mechanisms. The conveying assembly is provided with a conveying belt. The multiple testing mechanisms are sequentially arranged in the conveying direction of the conveying belt, any testing mechanism defines a first cavity, each testing mechanism is provided with a testing movable part and a hot air assembly, a testing window is formed in the side, facing the conveying belt, of the first cavity, and the hot air assembly is used for heating the first cavity; and the air outlet direction of the hot air assembly faces the test window. According to the diaphragm performance testing device, the testing movable part abuts against the diaphragm and limits the diaphragm, the testing movable part is used for testing the performance of the diaphragm, the hot air assembly blows air towards the testing window to heat the diaphragm, the purpose of testing the product performance of the diaphragm is achieved, the product performance of the diaphragm at different temperatures can be simulated conveniently, and the testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery separator test technical field, specifically, relate to a separator testing device and test system. BACKGROUND

[0002] Battery separator is the important component of lithium ion battery, its main function is between positive and negative to provide physical isolation, prevent short circuit, allow lithium ion to move freely in electrolyte simultaneously. High temperature baking process exists in the battery assembly process and can influence the product performance of separator, and in the battery use process, temperature runaway can be encountered, and the performance of separator is required to have stability under different temperature environment, wherein the product performance of separator under different temperature needs to be evaluated, such as air permeability, breakdown voltage and so on, so as to test the quality of separator. The common testing device needs to place the separator in different environmental temperature for detection, which leads to long test time and low test efficiency. SUMMARY

[0003] The utility model discloses a separator testing device and test system, realize the high temperature performance test of separator, so as to simulate the performance of separator under different temperature, improve test efficiency.

[0004] The utility model discloses a separator testing device, which comprises a conveying assembly and a plurality of test mechanisms.

[0005] The conveying assembly is provided with a conveying belt.

[0006] The plurality of test mechanisms are sequentially arranged along the transmission direction of the conveying belt. Any test mechanism defines a first chamber, and each test mechanism is provided with a test movable part and a hot air assembly. The first chamber is provided with a test window on one side facing the conveying belt. The hot air assembly is used for heating the first chamber, and the air outlet direction of the hot air assembly faces the test window. The test movable part has a first position extending towards the test window and a second position retracted to the test window.

[0007] When the test movable part is in the first position, the test movable part abuts against the separator, or when the test movable part is in the second position, the test movable part is separated from the separator.

[0008] In one possible embodiment of the utility model, the test mechanism further comprises a second chamber and a first pipeline. The hot air assembly is arranged in the second chamber. The outlet of the second chamber is connected in communication with the air inlet of the first chamber through the first pipeline.

[0009] In one possible implementation of the present application, the hot air assembly comprises a first heating member and a first air blower, the first heating member is used for heating the second chamber, and the first air blower is arranged at one end of the first pipeline.

[0010] In one possible implementation of the present application, the test mechanism further comprises a second pipeline and a second air blower, the input port of the second chamber is connected in communication with the air outlet of the first chamber through the second pipeline, and the second air blower is arranged at one end of the second pipeline.

[0011] In one possible implementation of the present application, the air outlet and the air inlet are centrally symmetrically distributed with the first chamber.

[0012] In one possible implementation of the present application, the test mechanism further comprises a third chamber, and the first chamber and the second chamber are arranged in the third chamber.

[0013] In one possible implementation of the present application, the test mechanism further comprises a test platform, the test platform is provided with a second heating member, the second heating member is arranged opposite to the test window, the conveying belt is located between the second heating member and the test window, and when the test movable member is in the first position, the second heating member heats the diaphragm through the conveying belt.

[0014] In one possible implementation of the present application, the conveying assembly further comprises a transmission roller and a first sensing member, the transmission roller is in transmission connection with the conveying belt, and the first sensing member is connected with the conveying belt.

[0015] In one possible implementation of the present application, the diaphragm test device further comprises a control member, and the control member is electrically connected with the conveying assembly and the plurality of test mechanisms respectively.

[0016] The second aspect of the present application provides a test system comprising the diaphragm test device in any one of the above embodiments.

[0017] Compared with the prior art, the diaphragm testing device and the testing system have the beneficial effects that: the diaphragm is placed on the conveying belt, the conveying belt of the conveying assembly is used for conveying the diaphragm, when the diaphragm is conveyed to the testing window position, the conveying belt stops conveying, the testing movable piece moves to the first position, the testing movable piece extends towards the direction of the testing window, the testing movable piece abuts against the diaphragm and limits the diaphragm, the testing movable piece is used for testing the performance of the diaphragm, the hot air assembly blows air towards the testing window to heat the diaphragm, the purpose of testing the high-temperature performance of the diaphragm is achieved, the plurality of testing mechanisms are sequentially arranged along the conveying belt, the first chambers of the plurality of testing mechanisms are respectively arranged at different temperatures, the diaphragm is respectively tested in the different first chamber positions, so that the product performance of the diaphragm under different temperatures is simulated, the product performance of the diaphragm is tested quickly under the premise of ensuring the testing effect, and the testing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0019] Figure 1 The structure diagram of the diaphragm testing device provided in some embodiments of the present application is shown.

[0020] Figure 2 The structure diagram of the testing mechanism of the diaphragm testing device provided in some embodiments of the present application is shown.

[0021] Main element symbol explanation;

[0022] 100-diaphragm testing device; 110-conveying assembly; 111-conveying belt; 112-driving roller; 113-first sensing piece; 120-testing mechanism; 121-first chamber; 1211-air inlet; 1212-air outlet; 122-testing movable piece; 123-hot air assembly; 1231-first heating piece; 1232-first air blower; 124-testing window; 125-second chamber; 1251-first pipeline; 1252-second pipeline; 126-second air blower; 127-third chamber; 128-testing platform; 1281-second heating piece; 130-control piece; X-first direction; Y-second direction. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0025] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provision", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the related art, the common test device needs to place the diaphragm in different environmental temperatures for detection, resulting in a long test time and low test efficiency. Meanwhile, in some test scenarios requiring continuous temperature rise test, the continuity of the existing diaphragm performance test method is poor, and the diaphragm needs to be detected at a certain temperature and then continue to wait for the equipment to further warm up. In this process of high temperature-cooling-high temperature, test errors will be caused, and the change of the diaphragm performance in the continuous temperature rise process cannot be accurately simulated.

[0030] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0031] Reference Figure 1 As shown in the drawings, the embodiments of the present application provide a diaphragm test device 100, which comprises a conveying assembly 110 and a plurality of test mechanisms 120. Specifically, for the convenience of description, here the test mechanism 120 is taken as an example for testing the air permeability of the diaphragm, of course, in other embodiments, the plurality of test mechanisms 120 can be set as devices for testing other performance parameters of the diaphragm, for example, any test mechanism 120 can also test the breakdown voltage and other performance parameters.

[0032] Specifically, in combination with Figure 1 and Figure 2As shown, the conveying assembly 110 is provided with a conveying belt 111, and the diaphragm is placed on the conveying belt 111, and the conveying belt 111 of the conveying assembly 110 is used for conveying the diaphragm. A plurality of test mechanisms 120 are sequentially arranged along the conveying direction of the conveying belt 111, any one of the test mechanisms 120 defines a first chamber 121, and each of the test mechanisms 120 is provided with a test movable element 122 and a hot air assembly 123, and the first chamber 121 is provided with a test window 124 on the side facing the conveying belt 111. The hot air assembly 123 is used for heating the first chamber 121, and the air outlet direction of the hot air assembly 123 faces the test window 124, and the test movable element 122 has a first position extending in the direction facing the test window 124 and a second position retracted to the test window 124. When the test movable element 122 is in the first position, the test movable element 122 abuts against the diaphragm, or when the test movable element 122 is in the second position, the test movable element 122 is separated from the diaphragm. Correspondingly, when the diaphragm is conveyed to the position of the test window 124, the conveying belt 111 stops conveying, the test movable element 122 moves to the first position, the test movable element 122 extends in the direction facing the test window 124, the test movable element 122 abuts against and limits the diaphragm, and the test movable element 122 is used for testing the air permeability of the diaphragm. The diaphragm is heated by the hot air assembly 123 blowing air towards the test window 124, so as to realize the purpose of testing the air permeability of the diaphragm at a set temperature, and a plurality of test mechanisms 120 are sequentially arranged along the conveying belt 111, so that the first chambers 121 of the plurality of test mechanisms 120 are respectively provided with different temperatures, and the diaphragm is respectively tested for air permeability at different positions of the first chambers 121, so as to simulate the air permeability of the diaphragm at different temperatures, to ensure the test effect, to quickly test the high-temperature air permeability of the diaphragm, and to improve the test efficiency.

[0033] In the diaphragm test process, the diaphragm is stopped at the test window 124 position of the first test mechanism 120, the test movable part 122 abuts against the diaphragm, and the diaphragm is tested for air permeability within a preset time. After the air permeability test is completed, the test results and test data are recorded. The test movable part 122 is moved from the first position to the second position, so that the test movable part 122 is separated from the diaphragm. The diaphragm is transmitted to the test window 124 position of the second test mechanism 120 by the conveying belt 111. The air permeability test of the multiple test mechanisms 120 is performed again according to the above-mentioned diaphragm air permeability test method. The air permeability test of the multiple test mechanisms 120 is different in environmental test temperature, so as to simulate the change of the air permeability of the diaphragm at the same position under multiple different environmental temperatures, thereby improving the test effect. In addition, multiple diaphragms can be tested to improve the test efficiency. For example, multiple diaphragms are placed on the conveying belt 111 of the conveying assembly 110 in sequence. When the first diaphragm is moved to the second test mechanism 120 after completing the test of the first test mechanism 120, the second diaphragm is moved to the first test mechanism 120.

[0034] It can be understood that the diaphragm will undergo a baking stage in the lithium battery manufacturing process. The temperature of the diaphragm changes in the baking stage, thereby affecting the air permeability of the diaphragm. The air permeability of the diaphragm ultimately affects the normal transmission of lithium ions of the electrolyte in the charging and discharging process of the lithium battery, thereby affecting the product quality of the lithium ion battery. Therefore, the air permeability of the diaphragm at different temperatures is tested in the present application to detect the quality of the diaphragm.

[0035] Reference Figure 1 As shown in the drawings, the diaphragm testing device 100 has a first direction X and a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other. For example, the first direction X is in the length direction of the diaphragm testing device 100, and the second direction Y is in the height direction of the diaphragm testing device 100. It can be understood that the above definition is only for the purpose of understanding the relative position relationship of each part in the diaphragm testing device 100, and should not be understood as a limitation of the present application.

[0036] For example, the conveying direction of the conveying belt 111 is the first direction X, that is, the conveying direction of the conveying belt 111 is the length direction of the diaphragm testing device 100. The moving direction of the test movable part 122 is the second direction Y, that is, the moving direction of the test movable part 122 is the height direction of the diaphragm testing device 100.

[0037] In one embodiment, optionally, as Figure 2As shown, the testing mechanism 120 further includes a second chamber 125 and a first pipe 1251. The hot air assembly 123 is disposed in the second chamber 125. The output port of the second chamber 125 is connected to the air inlet 1211 of the first chamber 121 through the first pipe 1251. The hot air assembly 123 located in the second chamber 125 generates hot air, which enters the air inlet 1211 of the first chamber 121 through the first pipe 1251 to facilitate heat exchange with the air in the first chamber 121 and form an airflow in the first chamber 121. Figure 2 (In the direction of the arrow in the image), the airflow will blow towards the test window 124 of the first chamber 121, so as to heat up the diaphragm located at the test window 124 and test the air permeability of the diaphragm at a preset temperature.

[0038] Optionally, refer to Figure 2 As shown, the hot air assembly 123 includes a first heating element 1231 and a first blower 1232. The first heating element 1231 is used to heat the second chamber 125. The first blower 1232 is disposed at one end of the first pipe 1251. Correspondingly, the first heating element 1231 heats the air in the second chamber 125, and the first blower 1232 generates an airflow and blows air toward the first pipe 1251, delivering hot air to the first chamber 121 through the first pipe 1251, thereby achieving the delivery of hot air and having a better technical effect.

[0039] Furthermore, a second temperature sensor is installed at the location of the first blower 1232 to detect the temperature near the first blower 1232, so as to monitor the temperature inside the second chamber 125 and adjust the heating power of the first heating element 1231 according to the monitoring data.

[0040] For example, the first heating element 1231 is a plurality of resistance wires, which are respectively arranged around the cavity wall of the second chamber 125. When the resistance wires are energized for heating, they heat the air around the second chamber 125 by generating heat. The resistance wires are made of nickel-chromium alloy.

[0041] Optionally, combined Figure 1 and Figure 2As shown, the test mechanism 120 further comprises a second pipeline 1252 and a second air blower 126, the input port of the second chamber 125 is connected with the air outlet 1212 of the first chamber 121 through the second pipeline 1252, and the second air blower 126 is arranged at one end of the second pipeline 1252, in other words, the hot air of the first chamber 121 is transported into the second chamber 125 through the second pipeline 1252 after completing heat exchange, and the second air blower 126 blows part of the hot air into the second chamber 125 (in the direction of the arrow) so as to be heated again by the hot air assembly 123 of the first chamber 121, improve the uniformity of the heating temperature of the air flow, realize the cyclic heating of the air flow, and keep the air pressure of the first chamber 121 and the second chamber 125 stable. Figure 2

[0042] Optionally, as shown in Figure 2 , the air outlet 1212 and the air inlet 1211 are centrally symmetrically distributed with the first chamber 121, that is, the air outlet 1212 and the air inlet 1211 are respectively arranged on opposite sides of the first chamber 121, and the air inlet 1211 is arranged away from the air outlet 1212, which reduces the interference and obstruction between the air flow of the air outlet 1212 and the air flow of the air inlet 1211, and has a better technical effect.

[0043] In one embodiment, optionally, as shown in Figure 1 , the test mechanism 120 further comprises a third chamber 127, and the first chamber 121 and the second chamber 125 are arranged in the third chamber 127, that is, the first chamber 121 and the second chamber 125 are located in the third chamber 127, which on the one hand plays a role in isolating and insulating the first chamber 121 and the second chamber 125, and reducing the heat loss of the first chamber 121 and the second chamber 125, and on the other hand, the test instrument is installed in the third chamber 127, and the test instrument is connected with the test moving part 122, so as to test the air permeability of the diaphragm, and the test instrument can be configured to test time and record test data, so as to enable the test personnel to view the test results at any time.

[0044] On the basis of any of the above embodiments, optionally, in combination with Figure 1 and Figure 2 ​As shown, the test mechanism 120 further comprises a test platform 128, the test platform 128 is provided with a second heating member 1281, the second heating member 1281 is arranged opposite to the test window 124, and the conveying belt 111 is located between the second heating member 1281 and the test window 124. When the test movable member 122 is in the first position, the second heating member 1281 heats the diaphragm through the conveying belt 111. In other words, the test platform 128 is used to connect and support the conveying belt 111. When the test movable member 122 is in the first position, the test movable member 122 abuts against the diaphragm. The diaphragm can be heated by the second heating member 1281. Under the combined action of the hot air assembly 123 for blowing hot air to the diaphragm and the second heating member 1281, the diaphragm can be quickly raised to a preset test temperature, thereby improving the test effect.

[0045] For example, when the test platform 128 is provided with the second heating member 1281, the material of the conveying belt 111 can be selected as non-woven fabric. The non-woven fabric makes the conveying belt 111 have higher strength, temperature resistance, air permeability and thinner thickness, thereby improving the heat transfer performance of the conveying belt 111. When the test movable member 122 abuts against the diaphragm, the diaphragm is pressed downward to the position of the second heating member 1281 of the test platform 128. The thickness of the non-woven fabric is D, and D satisfies: 25um≤D≤100um.

[0046] Optionally, as shown in Figure 1 As shown, the conveying assembly 110 further comprises a transmission roller 112 and a first sensing member 113. The transmission roller 112 is in transmission connection with the conveying belt 111. The first sensing member 113 is connected with the conveying belt 111. The transmission roller 112 is connected with the conveying belt 111 and rotates to drive the conveying belt 111 to move. The first sensing member 113 is arranged towards the conveying belt 111, so as to monitor the transmission time and transmission distance of the conveying belt 111. For example, the first sensing member 113 is an encoder. The encoder is a sensor for converting physical quantities (such as position, angle and speed) into electrical signals.

[0047] Optionally, as shown in Figure 1 As shown, the diaphragm test device 100 further comprises a control member 130. The control member 130 is electrically connected with the conveying assembly 110 and the plurality of test mechanisms 120 respectively. Correspondingly, the control member 130 can control the operation and stop of the conveying assembly 110, the movement of the test movable member 122 of the test mechanism 120 and the opening of the test instrument.

[0048] In conclusion, the diaphragm testing device 100 places the diaphragm on the conveying belt 111, the conveying belt 111 of the conveying assembly 110 is used for conveying the diaphragm, when the diaphragm is conveyed to the position of the testing window 124, the conveying belt 111 stops conveying, the testing movable part 122 is moved to the first position, the testing movable part 122 extends towards the testing window 124, the testing movable part 122 abuts against the diaphragm and limits the diaphragm, the testing movable part 122 is used for testing the performance of the diaphragm, the hot air assembly 123 blows hot air towards the testing window 124 to heat the diaphragm, the purpose of testing the high-temperature performance of the diaphragm is achieved, a plurality of testing mechanisms 120 are sequentially arranged along the conveying belt 111, the first cavities 121 of the plurality of testing mechanisms 120 are respectively arranged at different temperatures, so that the diaphragm is respectively tested in different first cavities 121 to simulate the product performance of the diaphragm at different temperatures, the product performance of the diaphragm is tested quickly under the premise of ensuring the testing effect, and the testing efficiency is improved.

[0049] The embodiment of the utility model further provides a kind of test system, including the diaphragm testing device 100 in the above embodiment, and the test system including diaphragm testing device 100 has all beneficial effects of diaphragm testing device 100, which will not be described in detail here.

[0050] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus, other examples of the example embodiments can have different values.

[0051] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A septum testing device, characterized by, The device comprises: a conveying assembly provided with a conveying belt; a plurality of testing mechanisms arranged in sequence along the conveying direction of the conveying belt, each of the testing mechanisms defining a first chamber, and each of the testing mechanisms being provided with a testing moving part and a hot air assembly, the first chamber being provided with a testing window on one side facing the conveying belt, the hot air assembly being configured to heat the first chamber, and the hot air assembly being configured to direct air out of the first chamber towards the testing window, the testing moving part being configured to extend out of the testing window in a first position and to retract into the testing window in a second position; when the testing moving part is in the first position, the testing moving part abuts a diaphragm, or when the testing moving part is in the second position, the testing moving part is separated from the diaphragm.

2. The septum test device of claim 1, wherein, The testing mechanism further comprises a second chamber and a first pipeline, the hot air assembly being arranged in the second chamber, and an outlet of the second chamber being connected to an air inlet of the first chamber through the first pipeline.

3. The septum test device of claim 2, wherein, The hot air assembly comprises a first heating element and a first air blower, the first heating element being configured to heat the second chamber, and the first air blower being arranged at one end of the first pipeline.

4. The septum test device of claim 2, wherein, The testing mechanism further comprises a second pipeline and a second air blower, an air inlet of the second chamber being connected to an air outlet of the first chamber through the second pipeline, and the second air blower being arranged at one end of the second pipeline.

5. The septum test device of claim 4, wherein, The air outlet and the air inlet are arranged in a central symmetry with respect to the first chamber.

6. The septum test device of claim 2, wherein, The testing mechanism further comprises a third chamber, the first chamber and the second chamber being arranged in the third chamber.

7. The membrane test device according to any one of claims 1 to 6, characterized in that The testing mechanism further comprises a testing platform provided with a second heating element, the second heating element being arranged opposite to the testing window, the second heating element being configured to heat the diaphragm through the conveying belt when the testing moving part is in the first position, and the conveying belt being arranged between the second heating element and the testing window.

8. The membrane test device according to any one of claims 1 to 6, characterized in that The conveying assembly further comprises a transmission roller and a first sensing element, the transmission roller being in transmission connection with the conveying belt, and the first sensing element being connected to the conveying belt.

9. The membrane test device according to any one of claims 1 to 6, characterized in that The device further comprises a control element, the control element being electrically connected to the conveying assembly and the plurality of testing mechanisms.

10. A test system, characterized by The device comprises the diaphragm testing device according to any one of claims 1 to 9. The device comprises the diaphragm testing device according to any one of claims 1 to 9.

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