Testing device for pole piece

Abstract

The utility model provides a pole piece testing device, which comprises a shell, the shell comprises a seat body and a cover body, the seat body and the cover body are arranged along a first direction and are detachably connected in a sealing way, the seat body and the cover body are matched to define an accommodating space suitable for accommodating a pole piece, at least one of the seat body and the cover body is internally provided with a liquid injection channel, and the liquid injection channel is communicated with the liquid injection channel; one end of the liquid injection channel communicates with the containing space, and the other end of the liquid injection channel forms a liquid injection opening in the surface of the shell. Each connecting assembly is connected with the pole piece and penetrates out of the shell, and each connecting assembly is connected with the shell in a sealed mode; and the sealing assembly is detachably arranged at the liquid injection opening and seals the liquid injection opening. According to the pole piece testing device, a packaging aluminum shell in an original test is replaced by the detachable seat body and the cover body, the use environment of the pole piece in a battery is simulated, and the pole piece testing device not only can be recycled, but also has strong compatibility, is simple to disassemble and assemble, quick and practical, and is favorable for reducing research and development cost and labor intensity of testers.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, and more specifically, to a testing device for a pole piece. Background Art

[0002] In the prior art, in order to test the performance of the electrode piece, it is necessary to package the electrode piece in the aluminum shell of the battery for testing, that is, the electrode piece is made into a battery structure with a shell for testing. This aluminum shell packaging is disposable and easy to deform. The electrode piece needs to be packaged once for each test, which has poor versatility, high production cost, complex operation, low efficiency, and increases the labor intensity of the tester. Utility Model Content

[0003] The utility model provides a new technical solution for a pole piece testing device, which can at least solve the problems of poor versatility, complex operation and low efficiency in the prior art.

[0004] The utility model provides a testing device for an electrode piece, comprising: a shell, the shell comprising a seat body and a cover body, the seat body and the cover body are arranged along a first direction and are detachably sealed and connected, the seat body and the cover body cooperate to define a storage space suitable for accommodating the electrode piece, at least one of the seat body and the cover body is provided with an injection channel, one end of the injection channel is communicated with the storage space, and the other end of the injection channel forms an injection port on the surface of the shell; a plurality of connecting components, each of the connecting components is connected to the electrode piece and passes through the shell, and each of the connecting components is sealed and connected to the shell; a sealing component, the sealing component is detachably arranged at the injection port and seals the injection port.

[0005] Optionally, the accommodating space is a first mounting groove, and the first mounting groove is arranged on a side of the base body facing the cover body.

[0006] Optionally, a second mounting groove is provided on the side of the base body facing the cover body, and the second mounting groove is annular and arranged around the accommodating space. The testing device also includes: a first sealing ring, the first sealing ring is arranged between the base body and the cover body, and the first sealing ring is arranged in the second mounting groove and protrudes from the second mounting groove.

[0007] Optionally, the number of the first sealing rings is at least two, and the at least two first sealing rings are sequentially sleeved on the outer peripheral side of the accommodating space along their own radial direction.

[0008] Optionally, the cover body is provided with a plurality of first mounting holes penetrating along the first direction, and the plurality of first mounting holes correspond one-to-one to the plurality of connecting components, and each of the connecting components includes: a first connecting column, one end of the first connecting column is located in the accommodating space and connected to the pole piece, the other end of the first connecting column passes through the shell from the corresponding first mounting hole, and the first connecting column is sealed and connected to the corresponding first mounting hole.

[0009] Optionally, each of the connecting components further includes: at least two second sealing rings, at least two second sealing rings are arranged along the axial direction of the first connecting column, and each of the second sealing rings is sleeved on the outer periphery of the first connecting column and abuts against the hole wall of the first mounting hole.

[0010] Optionally, each of the connecting components also includes: a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are spaced apart along the axial direction of the connecting column and are respectively sleeved on the first connecting column, the pole piece is located on the side of the first mounting seat away from the second mounting seat, the second mounting seat is exposed from the shell surface, the first mounting hole has a first step surface and a second step surface, the first step surface and the second step surface are spaced apart along the axial direction of the connecting column, and the second sealing ring is respectively provided between the first mounting seat and the first step surface and between the second mounting seat and the second step surface.

[0011] Optionally, each of the connection components further includes: a pole lug, which is connected to one end of the first connection column that passes through the shell.

[0012] Optionally, a plurality of third mounting grooves are provided on the base body, and one end of each of the first connecting columns accommodated in the accommodation space is arranged in the third mounting groove.

[0013] Optionally, the injection channel is arranged on the cover body, and the injection channel includes a first channel and a second channel, the first channel extends along the first direction, the second channel extends along the second direction, the first direction intersects with the second direction, one end of the first channel is connected to the accommodating space, the other end of the first channel is connected to one end of the second channel, and the other end of the second channel forms the injection port on the end surface of one end of the cover body.

[0014] Optionally, the sealing assembly includes: a positioning mechanism, which is arranged on the seat body; a rotating mechanism, which is rotatably arranged on the positioning mechanism around an axis extending along the second direction, and the rotating mechanism includes a sealing plug, which is detachably sealed and connected to the injection port; an elastic member, which is connected between the positioning mechanism and the rotating mechanism, and the elastic member is retractable along the second direction.

[0015] Optionally, the positioning mechanism includes: a positioning plate, which is connected to the seat body; a positioning rod, which extends along the second direction, one end of the positioning rod is connected to the positioning plate, and the other end of the positioning rod is provided with a limiting portion, one end of the elastic member is connected to the limiting portion, and the other end of the elastic member extends toward the positioning plate and presses the rotating mechanism against the positioning plate.

[0016] Optionally, the rotating mechanism includes: a rotating pressure plate, the rotating pressure plate having an installation channel and a second installation hole, the installation channel is sleeved on the positioning rod and can rotate around the axis of the positioning rod, the axis of the second installation hole is parallel to the axis of the installation channel, and the elastic member presses the rotating pressure plate against the positioning plate at one end close to the positioning plate; an adjusting rod, the adjusting rod is connected to the second installation hole, and the sealing plug is provided at one end of the adjusting rod close to the shell.

[0017] Optionally, the adjusting rod is screwed to the second mounting hole, a locking piece is provided at one end of the adjusting rod away from the shell, the locking piece is screwed to the adjusting rod, and the second mounting hole is located between the locking piece and the sealing plug.

[0018] Optionally, the base body is provided with a third mounting hole extending along the first direction, the cover body is provided with a fourth mounting hole extending along the first direction, the third mounting hole is arranged on the peripheral side of the second mounting groove, and the testing device also includes: a second connecting column, which is detachably connected to each of the third mounting holes and the corresponding fourth mounting holes.

[0019] According to the pole piece test device of the utility model, a detachable seat and cover are used to replace the original aluminum shell in the test, simulating the use environment of the pole piece in the battery, which can not only be recycled, but also has strong compatibility, can test the pole piece for various projects, is simple to disassemble and assemble, fast and practical, and is conducive to reducing R&D costs and the labor intensity of testers. In addition, the cover and the seat, the connecting assembly and the shell, and the sealing assembly and the injection port are all sealed, ensuring the sealing of the accommodation space for accommodating the pole piece during the test process.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 This is an exploded view of a pole piece testing device according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the connection between the connection assembly and the pole piece in a pole piece testing device according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of a base and a sealing assembly in a pole piece testing device according to an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of a partial structure including a cover body in a pole piece testing device according to an embodiment of the utility model;

[0026] Figure 5 It is a three-dimensional diagram of a pole piece testing device according to an embodiment of the utility model;

[0027] Figure 6 is a cross-sectional view of a pole piece testing device according to an embodiment of the utility model;

[0028] Figure 7 yes Figure 6 An enlarged view of the circled portion at A in the middle.

[0029] Reference numerals

[0030] Test device 1;

[0031] Housing 10; seat body 11; first mounting groove 111; second mounting groove 112; third mounting groove 113; third mounting hole 114;

[0032] Cover body 12; injection channel 121; first channel 1211; second channel 1212; injection port 1213; first mounting hole 122; fourth mounting hole 123;

[0033] Connecting assembly 20; first connecting column 21; second sealing ring 22; first mounting seat 23; second mounting seat 24; pole ear 25;

[0034] Sealing assembly 30; positioning mechanism 31; positioning plate 311; positioning rod 312; limiting portion 313; rotating mechanism 32; rotating pressure plate 321; mounting channel 3211; second mounting hole 3212; adjusting rod 322; locking member 323; sealing plug 324; elastic member 33;

[0035] A first sealing ring 40;

[0036] A second connecting column 50;

[0037] Positive electrode sheet 2; negative electrode sheet 3; insulating layer 4. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] The pole piece testing device 1 according to an embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0044] like Figures 1 to 5 As shown, the pole piece testing device 1 according to the embodiment of the utility model comprises: a housing 10 , a plurality of connection components 20 and a sealing component 30 .

[0045] Specifically, the housing 10 includes a base 11 and a cover 12, which are arranged along a first direction and are detachably sealed and connected. The base 11 and the cover 12 cooperate to define a storage space suitable for accommodating a pole piece. At least one of the base 11 and the cover 12 is provided with a liquid injection channel 121, one end of the liquid injection channel 121 is connected to the storage space, and the other end of the liquid injection channel 121 forms a liquid injection port 1213 on the surface of the housing 10. Each connecting component 20 is connected to the pole piece and passes through the housing 10, and each connecting component 20 is sealed and connected to the housing 10. The sealing component 30 is detachably arranged at the liquid injection port 1213 and seals the liquid injection port 1213.

[0046] In other words, the electrode testing device 1 according to the embodiment of the utility model is mainly composed of a housing 10, a plurality of connecting components 20 and a sealing component 30. The testing device 1 is mainly used to test the performance of the battery electrode, and can simulate the performance of the actual electrode working to study the performance of the dressing chemical material or the electrode.

[0047] The housing 10 is mainly composed of a base 11 and a cover 12, which can be arranged along a first direction, and the cover 12 can be covered on the base 11 and sealed with the base 11. The connection between the base 11 and the cover 12 is a detachable connection, so as to facilitate the disassembly and assembly of the cover 12 and the replacement of the pole piece during testing.

[0048] The base body 11 and the cover body 12 can cooperate to define a receiving space, and the electrode to be tested can be received in the receiving space. Specific examples include but are not limited to the following.

[0049] In case 1, a groove is provided on the base body 11, and the cover body 12 is covered on the base body 11 to seal the groove to form a receiving space;

[0050] In the second case, a groove is provided on the cover body 12, and the cover body 12 is covered on the base body 11 to seal the groove to form a receiving space;

[0051] In case three, grooves are respectively provided on the cover body 12 and the base body 11 , and the cover body 12 is covered on the base body 11 to seal the grooves to form a receiving space.

[0052] During the test, the positive electrode sheet 2 and the negative electrode sheet 3 to be tested can be accommodated in the accommodation space, and an insulating layer 4 can be provided between the positive electrode sheet 2 and the negative electrode sheet 3. In addition, an insulating layer 4 can also be provided between the positive electrode sheet 2 and the negative electrode sheet 3 and the base 11 and / or the cover 12. The insulating layer 4 can include but is not limited to a diaphragm.

[0053] The positive electrode sheet 2 and the negative electrode sheet 3 can be respectively led out to the outside of the housing 10 through the connecting assembly 20. Specifically, a portion of the connecting assembly 20 can extend into the accommodation space to connect with the positive electrode sheet 2 or the negative electrode sheet 3, a portion of the connecting assembly 20 can pass through the housing 10 and extend to the outside of the housing 10, and the portion of the connecting assembly 20 exposed from the housing 10 can be used as a pin to facilitate the connection of the positive electrode sheet 2 and the negative electrode sheet 3 with external testing equipment. In addition, the connection between the connecting assembly 20 and the housing 10 can be a sealed connection so that the accommodation space becomes a closed chamber during the test process.

[0054] In addition, the housing 10 is provided with a liquid injection channel 121, which can be provided on the base 11, or on the cover 12, or on both the base 11 and the cover 12, which is not limited here. One end of the liquid injection channel 121 can be connected to the accommodation space, and the other end of the liquid injection channel 121 can form a liquid injection port 1213 on the surface of the housing 10, and the electrolyte can be injected into the accommodation space through the liquid injection port 1213 to infiltrate the positive electrode sheet 2 and the negative electrode sheet 3.

[0055] The housing 10 is provided with a sealing assembly 30, and the sealing assembly 30 is detachably connected to the liquid injection port 1213. When the sealing assembly 30 is connected to the liquid injection port 1213, the sealing assembly 30 can block the liquid injection port 1213 to prevent electrolyte leakage. After the sealing assembly 30 is separated from the liquid injection port 1213, liquid can be injected into the receiving space through the quasi-port.

[0056] like Figure 6 and Figure 7 As shown, the first direction can be a vertical direction, the cover body 12 is arranged on the top of the base body 11, the positive electrode sheet 2 can be stacked on the negative electrode sheet 3, a diaphragm is provided between the positive electrode sheet 2 and the negative electrode sheet 3, and a diaphragm is also provided on the top of the positive electrode sheet 2. The positive electrode sheet 2, the negative electrode sheet 3 and the diaphragm are sealed in the accommodating space, and the electrolyte can be filled into the accommodating space through the liquid injection port 1213. During testing, the sealing component 30 can block the liquid injection port 1213. Since the base body 11 and the cover body 12 are sealed and connected, and the connecting component 20 and the shell 10 are sealed and connected, the accommodating space is formed into a closed chamber. The part of the connecting component 20 exposed from the shell 10 is connected to an external testing device, and the performance test of the electrode can be carried out.

[0057] Therefore, according to the pole piece test device 1 of the embodiment of the utility model, the detachable seat 11 and cover 12 are used to replace the original packaging aluminum shell in the test, simulating the use environment of the pole piece in the battery, which can not only be recycled, but also has strong compatibility, can test the pole piece for various projects, and is simple to disassemble and assemble, fast and practical, which is conducive to reducing the R&D cost and the labor intensity of the tester. In addition, the cover 12 and the seat 11, the connecting assembly 20 and the shell 10, and the sealing assembly 30 and the injection port 1213 are all sealed, ensuring the sealing of the accommodation space for accommodating the pole piece during the test process.

[0058] In some specific embodiments, the base and the cover 12 may be made of insulating, acid- and alkali-resistant materials to prevent the electrolyte from corroding the base and the cover 12 and to insulate the base, the cover 12 and the pole piece.

[0059] According to an embodiment of the present invention, the accommodating space is a first mounting groove 111 , and the first mounting groove 111 is disposed on a side of the base body 11 facing the cover body 12 .

[0060] Specifically, if Figure 3 As shown, the base 11 is provided with a first mounting groove 111 on one side facing the cover 12, and the first mounting groove 111 can be formed as a receiving space for receiving the pole piece. The size of the first mounting groove 111 can be adapted to pole pieces of various sizes to facilitate the testing requirements of pole pieces of various sizes.

[0061] Optionally, the second mounting groove 112 may be substantially a directional groove, which is easy to adapt to the shape of a square pole piece.

[0062] A side surface of the cover body 12 facing the base body 11 may be a plane, so that when the cover body 12 is covered on the base body 11 , the plane may close the notch of the first installation groove 111 .

[0063] In this embodiment, the first mounting groove 111 is arranged on the base body 11, and the first mounting groove 111 can be used to quickly position and install the pole piece, which is convenient for the tester to operate. At the same time, it is also beneficial to reduce the complexity of the shell 10. The accommodating space can be defined without grooving on the cover body 12, which is beneficial to reduce production costs.

[0064] According to some other embodiments of the utility model, a second mounting groove 112 is provided on the side of the base body 11 facing the cover body 12, the second mounting groove 112 is annular and is arranged around the accommodating space, and the testing device 1 also includes a first sealing ring 40, the first sealing ring 40 is arranged between the base body 11 and the cover body 12, the first sealing ring 40 is arranged in the second mounting groove 112 and protrudes from the second mounting groove 112.

[0065] That is, the base 11 and the cover 12 can be sealed and connected by the second sealing ring 22. Specifically, the base 11 is provided with a second mounting groove 112, the notch of the second mounting groove 112 can face the cover 12, and the first sealing ring 40 can be accommodated in the second mounting groove 112. Figure 6 As shown, when the cover body 12 is covered on the base body 11, the lower surface of the cover body 12 can squeeze the first sealing ring 40 to form a seal.

[0066] In addition, the second mounting groove 112 can be arranged around the accommodation space, for example, the annular second mounting groove 112 can surround the first mounting groove 111 on the base body 11. The first sealing ring 40 can be annular, so that the base body 11 and the cover body 12 can be sealed and connected by the first sealing ring 40 to prevent leakage from occurring at the gap between the base body 11 and the cover body 12.

[0067] Optionally, the first sealing ring 40 can be made of acid-resistant, alkali-resistant and corrosion-resistant materials to prevent air and liquid leakage between the seat body 11 and the cover body 12 .

[0068] In some specific embodiments of the present invention, the number of the first sealing rings 40 is at least two, and the at least two first sealing rings 40 are sequentially sleeved on the outer peripheral side of the accommodating space along their own radial direction.

[0069] Specifically, N first sealing rings 40 may be disposed between the base body 11 and the cover body 12, where N may be an integer ≥ 2. The N first sealing rings 40 may be coaxially disposed and sequentially sleeved on the outer periphery of the accommodation space along their own radial direction.

[0070] For example, Figure 3 As shown, the seat body 11 may be provided with two annular second mounting grooves 112, the two second mounting grooves 112 may be coaxially arranged, the inner ring second mounting groove 112 may be arranged around the first mounting groove 111, and the outer ring second mounting groove 112 may be arranged around the inner ring second mounting groove 112. A first sealing ring 40 may be respectively arranged in the two second mounting grooves 112.

[0071] In this embodiment, at least two first sealing rings 40 are provided to form a multi-layer seal, which is beneficial to improving the sealing performance and reducing the risk of leakage.

[0072] According to some optional embodiments of the utility model, the cover body 12 is provided with a plurality of first mounting holes 122 penetrating along the first direction, and the plurality of first mounting holes 122 correspond one-to-one to the plurality of connecting components 20, each connecting component 20 includes a first connecting column 21, one end of the first connecting column 21 is located in the accommodating space and connected to the pole piece, and the other end of the first connecting column 21 passes through the shell 10 from the corresponding first mounting hole 122, and the first connecting column 21 is sealed and connected to the corresponding first mounting hole 122.

[0073] Specifically, the cover body 12 may be provided with a plurality of first mounting holes 122, the first mounting holes 122 may penetrate the cover body 12 along the first direction, and form openings on both side surfaces of the cover body 12, and the first mounting holes 122 may communicate with the accommodation space. The number of the second mounting holes 3212 may be equal to the number of the connecting components 20, for example, the testing device 1 includes two connecting components 20, and the cover body 12 is provided with two first mounting holes 122, wherein one connecting component 20 is connected to the positive electrode sheet 2 through one first mounting hole 122, and the other connecting component 20 is connected to the negative electrode sheet 3 through another first mounting hole 122.

[0074] Each connection assembly 20 includes a first connection column 21, which can extend along the first direction and be connected to the first mounting hole 122. One end of the first connection column 21 can be located in the accommodation space and connected to the pole piece, and the other end of the first connection column 21 can be located outside the housing 10. Thus, the first connection column 21 can lead out the positive and negative poles of the pole piece to facilitate external connection for testing.

[0075] In addition, the first connection column 21 is sealed to the first mounting hole 122 to ensure the airtightness of the accommodation space. The sealed connection may include but is not limited to a sealant connection and a sealing member connection.

[0076] Optionally, the first connecting column 21 may be made of brass material so that the first connecting column 21 has good electrical conductivity.

[0077] According to some other embodiments of the utility model, each connecting assembly 20 also includes at least two second sealing rings 22, and the at least two second sealing rings 22 are arranged along the axial direction of the first connecting column 21, and each second sealing ring 22 is sleeved on the outer periphery of the first connecting column 21 and abuts against the wall of the first mounting hole 122.

[0078] Specifically, the first connecting column 21 and the first mounting hole 122 can be sealed and connected via a second sealing ring 22. The number of second sealing rings 22 can be M, where M can be an integer ≥ 2, thereby forming a multi-layer seal, which is beneficial to improving the sealing performance and reducing the risk of leakage.

[0079] The M second sealing rings 22 can be arranged along the first direction and sleeved on the first connecting column 21. The first connecting column 21 and the inner wall surface of the first mounting hole 122 can squeeze the second sealing ring 22 to form a seal.

[0080] In some specific embodiments of the present utility model, each connection assembly 20 also includes a first mounting seat 23 and a second mounting seat 24. The first mounting seat 23 and the second mounting seat 24 are spaced apart along the axial direction of the connecting column and are respectively sleeved on the first connecting column 21, the pole piece is located on the side of the first mounting seat 23 away from the second mounting seat 24, the second mounting seat 24 is exposed from the surface of the housing 10, the first mounting hole 122 has a first step surface and a second step surface, the first step surface and the second step surface are spaced apart along the axial direction of the connecting column, and a second sealing ring 22 is respectively provided between the first mounting seat 23 and the first step surface and between the second mounting seat 24 and the second step surface.

[0081] Specifically, the first connection column 21 may be sleeved with a first mounting seat 23 and a second mounting seat 24 . The first mounting seat 23 and the second mounting seat 24 may be spaced apart along the first direction. The second sealing ring 22 may be disposed between the first mounting seat 23 and the second mounting seat 24 .

[0082] The first mounting seat 23 can be arranged in the accommodation space. The first mounting seat 23 and the cap portion 213 of the first connecting column 21 clamp the lead-out end of the pole piece, and a gasket can be arranged between the first mounting seat 23 and the lead-out end of the pole piece so that the height of the first mounting seat 23 on each first connecting column 21 is the same. The second mounting seat 24 can be exposed from the surface of the housing 10.

[0083] The first mounting hole 122 may have a step structure therein, and the step structure may have two step surfaces arranged opposite to each other, namely a first step surface and a second step surface. The first step surface and the first mounting seat 23 may clamp a second sealing ring 22, and the second step surface and the second mounting seat 24 may clamp another second sealing ring 22, thereby achieving double-layer sealing.

[0084] In the process of installing the electrode sheets, the lead ends of the positive electrode sheet 2 and the negative electrode sheet 3 can be connected to a first connecting column 21 respectively, and a diaphragm can be set between the positive electrode sheet 2 and the negative electrode sheet 3 and on the top side of the positive electrode sheet 2. The first mounting seat 23 is sleeved on the first connecting column 21, and a second sealing ring 22 is installed on the top side of the first mounting seat 23 to form a component to be tested. The component to be tested is placed on the seat body 11 so that the electrode sheet is accommodated in the first mounting groove 111. The cover body 12 is covered on the seat body 11 so that the first connecting column 21 passes through the first mounting hole 122. Another second sealing ring 22 and a second mounting seat 24 are sleeved on the part of the first connecting column 21 exposed from the shell 10 in sequence, and the second mounting seat 24 is screwed to the first connecting column 21. The second mounting seat 24 is rotated so that the second mounting seat 24 and the second step surface press the second sealing ring 22.

[0085] In this embodiment, a first mounting seat 23 is provided to cooperate with the first step surface, and a second mounting seat 24 is provided to cooperate with the second step surface to clamp the corresponding second sealing ring 22, so that the clamping force applied to the second sealing ring 22 extends along the first direction, which can play a better sealing role, improve the sealing performance, and facilitate disassembly and assembly, quick connection and practicality, which is conducive to reducing the labor intensity of testers.

[0086] In some specific embodiments, the first connecting column 21 is detachably connected to the cover body 12. For example, the first connecting column 21 can be a bolt, which can include a threaded section 211, an optical section 212, and a cap 213 arranged in sequence, the threaded section 211 is provided with an external thread, the outer circumference of the optical section 212 can be a smooth circumferential surface, and the cap 213 can limit the pole piece. The sealing ring can be sleeved on the optical section 212, and the second mounting seat 24 can be screwed to the threaded section 211.

[0087] According to some optional embodiments of the present invention, each connection assembly 20 further includes a pole ear 25 , and the pole ear 25 is connected to one end of the first connection column 21 passing through the housing 10 .

[0088] like Figure 5 and Figure 6 As shown, the tab 25 can be arranged on a side of the second mounting seat 24 away from the first mounting seat 23. The tab 25 is detachably connected to the first connecting column 21 to facilitate disassembly and assembly during testing. The tab 25 can be made of brass material to improve the conductivity of the tab 25.

[0089] In this embodiment, the pole ear 25 is arranged at the end of the first connecting column 21 passing through the housing 10, so that the positive and negative poles of the pole piece can be conveniently connected to the external test equipment. When testing, the various structures of the connecting assembly 20 can be quickly removed from the housing 10 and the next set of pole pieces can be replaced for testing. Therefore, the test device 1 of this embodiment has the advantages of simple disassembly and assembly, repeatability, and multi-project use.

[0090] According to some other embodiments of the present invention, a plurality of third mounting grooves 113 are disposed on the base body 11 , and one end of each first connecting column 21 accommodated in the accommodation space is disposed in the third mounting groove 113 .

[0091] Specifically, Figure 3 As shown, the seat body 11 is provided with a third mounting groove 113, and the number of the third mounting grooves 113 can be equal to the number of the first connecting pillars 21. The third mounting groove 113 can be provided on the groove bottom surface of the first mounting groove 111, and one end of the first connecting pillar 21 extending into the accommodation space can be connected in the third mounting groove 113. For example, the cap portion 213 of the first connecting pillar 21 can be provided in the third mounting groove 113 and limited by the groove bottom surface of the first mounting groove 111.

[0092] In addition, three extension sections may be provided at the left end of the first mounting groove 111 , and the three extension sections may be spaced apart from each other. The middle extension section may be connected to the injection channel 121 , and the extension sections at both ends may be opposite to the two first mounting holes 122 , respectively.

[0093] In some specific embodiments of the utility model, the injection channel 121 is provided on the cover body 12, and the injection channel 121 includes a first channel 1211 and a second channel 1212. The first channel 1211 extends along a first direction, and the second channel 1212 extends along a second direction. The first direction intersects with the second direction. One end of the first channel 1211 is connected to the accommodating space, and the other end of the first channel 1211 is connected to one end of the second channel 1212. The other end of the second channel 1212 forms an injection port 1213 on the end surface of one end of the cover body 12.

[0094] Specifically, Figure 6 As shown, a liquid injection channel 121 is provided in the cover body 12, and the liquid injection channel 121 can be mainly composed of a first channel 1211 and a second channel 1212, wherein the first channel 1211 can extend along a first direction, the second channel 1212 can extend along the first direction, and the second direction can have an angle with the first direction. Optionally, the first direction and the second direction are perpendicular.

[0095] One end of the first channel 1211 forms an opening on a side of the cover body 12 facing the base body 11 and is connected to the first mounting groove 111. The other end of the first channel 1211 is connected to one end of the second channel 1212. The other end of the second channel 1212 can form a liquid injection port 1213 on the surface of the cover body 12.

[0096] The cover body 12 may be a flat structure, the thickness direction of the cover body 12 may be a first direction, the opening formed by the first channel 1211 may be provided on a side surface of the cover body 12 , and the injection port 1213 formed by the second channel 1212 may be located on the end surface of the cover body 12 .

[0097] The sealing component 30 can be arranged at one end of the cover body 12 and corresponding to the liquid injection port 1213. Therefore, the liquid injection port 1213 and the exposed portion of the first connecting column 21 are arranged on different surfaces, which can facilitate the disassembly and assembly between the sealing component 30 and the liquid injection port 1213, avoid the disassembly and assembly process affecting the connection between the connecting component 20 and the external test equipment, and help improve the safety of the test device 1.

[0098] According to some optional embodiments of the utility model, the sealing assembly 30 includes a positioning mechanism 31, a rotating mechanism 32 and an elastic member 33. The positioning mechanism 31 is provided on the seat body 11. The rotating mechanism 32 is rotatably provided with the positioning mechanism 31 around an axis extending along the second direction, and the rotating mechanism 32 includes a sealing plug 324, and the sealing plug 324 is detachably sealed and connected to the injection port 1213. The elastic member 33 is connected between the positioning mechanism 31 and the rotating mechanism 32, and the elastic member 33 is retractable along the second direction.

[0099] In other words, the sealing assembly 30 may be mainly composed of a positioning mechanism 31, a rotating mechanism 32 and an elastic member 33. The positioning mechanism 31 may be fixed on the seat body 11, and the connection between the positioning mechanism 31 and the seat body 11 may include but is not limited to bolt connection.

[0100] The rotating mechanism 32 is connected to the positioning mechanism 31, and the rotating mechanism 32 can rotate around a preset axis, and the preset axis can extend along the second direction. The rotating mechanism 32 can realize the disassembly and assembly between the sealing plug 324 and the injection port 1213 by rotating.

[0101] In addition, an elastic member 33 may be connected between the rotating mechanism 32 and the positioning mechanism 31 , and the elastic member 33 may be retractable along the second direction.

[0102] When it is necessary to open the liquid injection port 1213, under the action of external force, the rotating mechanism 32 overcomes the elastic force of the elastic member 33 along the second direction and moves toward the side away from the liquid injection port 1213, so that the sealing plug 324 is separated from the liquid injection port 1213, and then the rotating mechanism 32 is rotated to make the sealing plug 324 offset from the liquid injection port 1213, and then the external force is removed. Since the sealing plug 324 is offset from the liquid injection port 1213, the liquid injection port 1213 is in an open state, and liquid can be injected through the liquid injection port 1213 at this time.

[0103] After the injection is completed, an external force is applied to the rotating mechanism 32, so that the rotating mechanism 32 overcomes the elastic force of the elastic member 33 along the second direction and moves toward the side away from the injection port 1213, and the rotating mechanism 32 is rotated so that the sealing plug 324 is opposite to the injection port 1213. Then the external force is removed, and the sealing plug 324 can be extended into the injection port 1213 to seal the injection port 1213.

[0104] Optionally, the sealing plug 324 may be made of acid-resistant, alkali-resistant and corrosion-resistant material to increase the service life of the sealing plug 324 .

[0105] According to some other embodiments of the utility model, the positioning mechanism 31 includes a positioning plate 311 and a positioning rod 312. The positioning plate 311 is connected to the seat body 11. The positioning rod 312 extends along the second direction, one end of the positioning rod 312 is connected to the positioning plate 311, the other end of the positioning rod 312 is provided with a limiting portion 313, one end of the elastic member 33 is connected to the limiting portion 313, and the other end of the elastic member 33 extends toward the positioning plate 311 and presses the rotating mechanism 32 against the positioning plate 311.

[0106] In other words, the positioning mechanism 31 can be mainly composed of a positioning plate 311 and a positioning rod 312. The positioning plate 311 can be connected to the base body 11. Optionally, the positioning plate 311 is detachably connected to the base body 11. For example, the positioning plate 311 is connected to the base body 11 by bolts.

[0107] The positioning rod 312 can extend along the second direction, one end of the positioning rod 312 can be connected to the positioning plate 311, the other end of the positioning rod 312 can be provided with a limiting portion 313, one end of the elastic member 33 can be limited by the limiting portion 313, and the other end of the elastic member 33 can abut against the rotating assembly and press the rotating assembly against the positioning plate 311.

[0108] like Figure 6 As shown, the positioning rod 312 can be screwed to the positioning plate 311 , so that the distance between the limiting portion 313 and the positioning plate 311 can be adjusted by rotating the positioning rod 312 . The elastic member 33 can be a spring, and the spring can be sleeved on the positioning rod 312 .

[0109] The structure of the positioning plate 311 and the positioning rod 312 in this embodiment is simple, easy to assemble and disassemble, and highly reliable.

[0110] In some specific embodiments of the present utility model, the rotating mechanism 32 includes a rotating pressing plate 321 and an adjusting rod 322. The rotating pressing plate 321 has a mounting channel 3211 and a second mounting hole 3212. The mounting channel 3211 is sleeved on the positioning rod 312 and can rotate around the axis of the positioning rod 312. The axis of the second mounting hole 3212 is parallel to the axis of the mounting channel 3211. The end of the elastic member 33 close to the positioning plate 311 presses the rotating pressing plate 321 against the positioning plate 311. The adjusting rod 322 is connected to the second mounting hole 3212, and a sealing plug 324 is provided at the end of the adjusting rod 322 close to the housing 10.

[0111] like Figure 6 As shown, one end of the elastic member 33 facing the positioning plate 311 can abut against the rotating pressure plate 321. The rotating pressure plate 321 can have an installation channel 3211. The elastic member 33 can be accommodated in the installation channel 3211 to avoid the elastic member 33 from being exposed, which is beneficial to improving safety.

[0112] The axis of the installation channel 3211 can coincide with the axis of the positioning rod 312, and a second installation hole 3212 is provided on the installation pressure plate. The axis of the second installation hole 3212 can be parallel to the axis of the installation channel 3211, and the second installation hole 3212 is connected to the adjusting rod 322, and a sealing plug 324 is provided at one end of the adjusting rod 322.

[0113] The rotating pressure plate 321 can rotate around the axis of the positioning rod 312 to make the adjustment rod 322 swing around the axis of the positioning rod 312, so that the sealing plug 324 and the injection port 1213 are opposite or staggered in the second direction.

[0114] According to some optional embodiments of the utility model, the adjusting rod 322 is screwed to the second mounting hole 3212 , a locking piece 323 is provided at one end of the adjusting rod 322 away from the shell 10 , the locking piece 323 is screwed to the adjusting rod 322 , and the second mounting hole 3212 is located between the locking piece 323 and the sealing plug 324 .

[0115] Specifically, the adjusting rod 322 may be provided with an external thread, and the second mounting hole 3212 may be provided with an internal thread. The adjusting rod 322 may be screwed to the rotating pressure plate 321 through the second mounting hole 3212. Rotating the adjusting rod 322 may enable the adjusting rod 322 to move along the second direction, thereby adjusting the distance between the sealing plug 324 and the cover body 12, and further adjusting the depth of the sealing plug 324 extending into the liquid injection port 1213.

[0116] The locking piece 323 can be threadedly connected to one end of the adjustment rod 322 away from the injection port 1213, and the locking piece 323 can abut against the rotating pressure plate 321 to lock the adjustment rod 322 to prevent the adjustment rod 322 from moving along the second direction. Optionally, the locking piece 323 can be a nut.

[0117] In some specific embodiments, the positioning plate 311, the positioning rod 312, the rotating pressure plate 321, the adjusting rod 322 and the locking member 323 can be made of stainless steel. Since the above structure is subjected to the elastic force of the elastic member 33 and is a force-bearing structure, the use of stainless steel can improve the strength of the above structure and increase its service life.

[0118] According to some other embodiments of the utility model, a third mounting hole 114 extending along the first direction is provided on the base body 11, a fourth mounting hole 123 extending along the first direction is provided on the cover body 12, the third mounting hole 114 is arranged on the peripheral side of the second mounting groove 112, and the testing device 1 also includes a second connecting column 50, which is detachably connected to each third mounting hole 114 and the corresponding fourth mounting hole 123, respectively.

[0119] Specifically, the base body 11 may be provided with a third mounting hole 114, and the cover body 12 may be provided with a fourth mounting hole 123, and the third mounting hole 114 and the fourth mounting hole 123 may be arranged opposite to each other. At least one of the third mounting hole 114 and the fourth mounting hole 123 may be a through hole, so that the second connecting column 50 can be inserted to detachably connect the base body 11 and the cover body 12 together.

[0120] Optionally, the second connecting column 50 may be a bolt, and the third mounting hole 114 may be a threaded hole. The second connecting column 50 may enter the third mounting hole 114 from the fourth mounting hole 123 and be screwed and fixed to the third mounting hole 114 to facilitate the disassembly and assembly of the base body 11 and the cover body 12.

[0121] The number of the second connecting columns 50 may be four, and the housing 10 may be substantially in the shape of a cuboid. The four second connecting columns 50 may be disposed at the four corners of the housing 10 and surround the first sealing ring 40 of the outermost circle.

[0122] In addition, the third mounting hole 114 may be disposed on the outer periphery of the second mounting groove 112 , so that the second connecting column 50 is located on the outer periphery of the first sealing ring 40 , thereby preventing the second connecting column 50 from being corroded by the electrolyte.

[0123] In some optional embodiments, the number of the connecting components 20 is two, and the two connecting components 20 are spaced apart along the third direction. The first direction, the second direction, and the third direction may be perpendicular to each other.

[0124] The testing process of the testing device 1 of this embodiment is described in detail below.

[0125] The two first sealing rings 40 are located in the corresponding second mounting grooves 112. Install the positive electrode sheet 2 and the negative electrode sheet 3 to be tested on the first connecting column 21, and then install the first mounting seat 23 and a first sealing ring 40 on the first connecting column 21 in sequence, and then install these as a whole into the first mounting groove 111 of the seat body 11. Cover the cover body 12 so that the first connecting column 21 passes through the first mounting hole 122, and then pass the four second connecting columns 50 into the fourth mounting hole 123 and screw them with the third mounting hole 114 to fix the cover body 12 on the seat body 11. Install another first sealing ring 40 and a second mounting seat 24 on the first connecting column 21, and tighten the second mounting seat 24. Connect the pole ear 25 to the first connecting column 21.

[0126] Liquid is injected into the first installation groove 111 through the injection hole, and the rotating pressing plate 321 is pulled out along the second direction toward the side away from the positioning plate 311, and then the rotating pressing plate 321 is rotated so that the sealing plug 324 at the end of the adjusting rod 322 is directly opposite to the injection port 1213, and the rotating pressing plate 321 is loosened so that the sealing plug 324 extends into the injection port 1213 to seal the injection port 1213. Then, the test equipment is connected through the tab 25 for testing.

[0127] When the positive electrode sheet 2 and the negative electrode sheet 3 are replaced for testing, the liquid injection port 1213 is opened in sequence according to the connection sequence of each structure, the electrolyte is discharged, and the cover 12 is removed. The positive electrode sheet 2 and the negative electrode sheet 3 fixed to the first connecting column 21 are taken out, and the positive electrode sheet 2 and the negative electrode sheet 3 on the first connecting column 21 are replaced, and the test device 1 is assembled according to the above test process for the next round of testing.

[0128] In summary, the pole piece test device 1 provided by the utility model uses a detachable seat 11 and cover 12 to replace the original packaging aluminum shell in the test, simulating the use environment of the pole piece in the battery, which can not only be recycled, but also has strong compatibility, can test the pole piece for various projects, is simple to disassemble and assemble, fast and practical, and is conducive to reducing R&D costs and the labor intensity of testers. In addition, the cover 12 and the seat 11, the connecting assembly 20 and the housing 10, and the sealing assembly 30 and the injection port 1213 are all sealed, ensuring the sealing of the accommodation space for accommodating the pole piece during the test process.

[0129] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pole piece testing device, characterized in that: include: A shell, the shell comprising a base and a cover, the base and the cover are arranged along a first direction and are detachably sealed and connected, the base and the cover cooperate to define a storage space suitable for storing a pole piece, at least one of the base and the cover is provided with a liquid injection channel, one end of the liquid injection channel is communicated with the storage space, and the other end of the liquid injection channel forms a liquid injection port on the surface of the shell; A plurality of connecting components, each of which is connected to the pole piece and passes through the shell, and each of which is sealed and connected to the shell; A sealing component is detachably arranged at the liquid injection port and seals the liquid injection port.

2. The pole piece testing device according to claim 1, characterized in that: The accommodating space is a first mounting groove, and the first mounting groove is arranged on a side of the base body facing the cover body.

3. The pole piece testing device according to claim 1, characterized in that: A second mounting groove is provided on one side of the base body facing the cover body, and the second mounting groove is annular and arranged around the accommodation space. The testing device further includes: A first sealing ring is disposed between the base body and the cover body, and the first sealing ring is disposed in the second mounting groove and protrudes from the second mounting groove.

4. The pole piece testing device according to claim 3, characterized in that: The number of the first sealing rings is at least two, and the at least two first sealing rings are sequentially sleeved on the outer peripheral side of the accommodating space along their own radial direction.

5. The pole piece testing device according to claim 1, characterized in that: The cover body is provided with a plurality of first mounting holes penetrating along the first direction, the plurality of first mounting holes correspond one-to-one to the plurality of connecting components, and each of the connecting components comprises: A first connecting column, one end of which is located in the accommodating space and connected to the pole piece, the other end of which passes through the shell from the first mounting hole, and the first connecting column is sealed and connected to the first mounting hole.

6. The pole piece testing device according to claim 5, characterized in that: Each of the connection components also includes: At least two second sealing rings are arranged along the axial direction of the first connecting column, and each of the second sealing rings is sleeved on the outer periphery of the first connecting column and abuts against the hole wall of the first mounting hole.

7. The pole piece testing device according to claim 6, characterized in that: Each of the connection components also includes: A first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are spaced apart along the axial direction of the connecting column and are respectively sleeved on the first connecting column, the pole piece is located on the side of the first mounting seat away from the second mounting seat, the second mounting seat is exposed from the shell surface, the first mounting hole has a first step surface and a second step surface, the first step surface and the second step surface are spaced apart along the axial direction of the connecting column, and the second sealing ring is respectively provided between the first mounting seat and the first step surface and between the second mounting seat and the second step surface.

8. The pole piece testing device according to claim 5, characterized in that: Each of the connection components also includes: A pole ear is connected to an end of the first connecting column that passes through the shell.

9. The pole piece testing device according to claim 5, characterized in that: The seat body is provided with a plurality of third mounting grooves, and one end of each of the first connecting pillars accommodated in the accommodation space is arranged in the third mounting groove.

10. The pole piece testing device according to claim 1, characterized in that: The injection channel is arranged on the cover body, and the injection channel includes a first channel and a second channel, the first channel extends along the first direction, the second channel extends along the second direction, the first direction intersects with the second direction, one end of the first channel is connected to the accommodating space, the other end of the first channel is connected to one end of the second channel, and the other end of the second channel forms the injection port on the end surface of one end of the cover body.

11. The pole piece testing device according to claim 10, characterized in that: The sealing assembly comprises: A positioning mechanism, the positioning mechanism is arranged on the seat body; a rotating mechanism, the rotating mechanism being rotatably disposed on the positioning mechanism around an axis extending along the second direction, the rotating mechanism comprising a sealing plug, the sealing plug being detachably sealed and connected to the liquid injection port; An elastic member is connected between the positioning mechanism and the rotating mechanism, and the elastic member is retractable along the second direction.

12. The pole piece testing device according to claim 11, characterized in that: The positioning mechanism comprises: A positioning plate connected to the seat body; A positioning rod extending along the second direction, one end of the positioning rod being connected to the positioning plate, the other end of the positioning rod being provided with a limiting portion, one end of the elastic member being connected to the limiting portion, the other end of the elastic member extending toward the positioning plate and pressing the rotating mechanism against the positioning plate.

13. The pole piece testing device according to claim 12, characterized in that: The rotating mechanism comprises: A rotating pressing plate, wherein the rotating pressing plate has a mounting channel and a second mounting hole, the mounting channel is sleeved on the positioning rod and is rotatable around the axis of the positioning rod, the axis of the second mounting hole is parallel to the axis of the mounting channel, and the end of the elastic member close to the positioning plate presses the rotating pressing plate against the positioning plate; An adjusting rod is connected to the second mounting hole, and the sealing plug is provided at one end of the adjusting rod close to the shell.

14. The pole piece testing device according to claim 13, characterized in that: The adjusting rod is screwed to the second mounting hole, a locking piece is provided at one end of the adjusting rod away from the shell, the locking piece is screwed to the adjusting rod, and the second mounting hole is located between the locking piece and the sealing plug.

15. The pole piece testing device according to claim 3, characterized in that: The seat body is provided with a third mounting hole extending along the first direction, the cover body is provided with a fourth mounting hole extending along the first direction, the third mounting hole is provided on the peripheral side of the second mounting groove, and the testing device further includes: A second connecting column is detachably connected to each of the third mounting holes and the corresponding fourth mounting hole.

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