CN210954272U - Integral type lithium cell test mould - Google Patents

Abstract

The application provides an integrated lithium battery testing mold which comprises an upper base, a lower base and a pressing mechanism, wherein the upper base comprises a first conductive part, the lower base comprises a second conductive part, and an accommodating cavity for accommodating a battery is arranged between the upper base and the lower base; the pressing mechanism is arranged on the peripheries of the first conductive part and the second conductive part, the pressing mechanism comprises a rod-shaped part arranged in the vertical direction, the upper base can move up and down along the rod-shaped part, and the pressing mechanism further comprises an adjusting part used for adjusting the distance between the upper base and the lower base; after the upper base and the lower base are abutted by the pressing mechanism, the upper end and the lower end of the battery are respectively in electric communication with the first conductive part and the second conductive part. The lithium battery test mould in this application goes up the base and adopts the non-rotation mode contact with lower base, compares in this device of ordinary screw connection device can not cause adverse effect such as turn-knob to battery inner structure for measure more accurately.

Description

Integral type lithium cell test mould

Technical Field

The application relates to the technical field of lithium battery performance testing, in particular to an integrated lithium battery testing mold.

Background

Lithium batteries are a class of secondary batteries, which mainly rely on the movement of lithium ions between a positive electrode and a negative electrode to store or release energy, and the lithium ions are inserted and extracted back and forth between the two electrodes in the charging and discharging process. Therefore, the performance of the lithium battery greatly depends on the quality of the lithium battery material, the electrochemical performance of the lithium battery is a key index influencing the performance of the battery, and therefore the charging and discharging electrical performance of the positive and negative electrode materials needs to be detected.

CN209282337U discloses a special device for testing battery performance, which comprises a conductive adjusting screw, an insulating mould, a first conductive sheet, a second conductive sheet and a conductive mould, wherein the insulating mould and the conductive mould are assembled and connected through threads; a first conducting strip mounting groove is formed in the conducting die, a second conducting strip mounting groove is formed in the insulating die, and the first conducting strip and the second conducting strip are respectively mounted in the first conducting strip mounting groove and the second conducting strip mounting groove; the middle part of the insulating die is provided with an installation through hole for installing a conductive adjusting screw, and the second conductive sheet installation groove is communicated with the installation through hole; the conductive adjusting screw rod is in threaded assembly connection with the mounting through hole. The connection mode of each part of the battery performance testing device mainly depends on threaded connection, and certain torque and other influences which are not favorable for measuring accuracy can be caused on the internal structure of the battery.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides an integrated lithium battery testing mold, which comprises an upper base, a lower base and a pressing mechanism, wherein the upper base comprises a first conductive part which is arranged in the upper base in a penetrating manner in the vertical direction; the lower base comprises a second conductive part, the second conductive part is arranged in the lower base in a penetrating manner in the vertical direction, and an accommodating cavity for accommodating a battery is arranged between the upper base and the lower base; the pressing mechanism is arranged on the peripheries of the first conductive part and the second conductive part, the pressing mechanism comprises a rod-shaped part arranged in the vertical direction, the upper base can move up and down along the rod-shaped part, and the pressing mechanism further comprises an adjusting part used for adjusting the distance between the upper base and the lower base; after the upper base and the lower base are abutted by the pressing mechanism, the upper end and the lower end of the battery are respectively in electric communication with the first conductive part and the second conductive part. Lithium cell test mould upper base in this application adopts non-rotation mode contact with lower base, compares in ordinary screw connection device, and this device can not cause adverse effect such as turn-knob to battery inner structure for it is more accurate to measure.

Further, the rod-shaped part is a screw rod, the adjusting part is a nut, the nut moves up and down along the screw rod direction, one end of the screw rod is hinged to the lower base, and the upper base is provided with a connecting part matched with the pressing mechanism. This application is through the articulated connected mode of screw rod with the lower base for this test mould more has the integration, need not extra mounting tool, pollution-free, advantage such as with low costs.

Further, connecting portion include the first recess that sets up with the screw rod cooperation, when the screw rod upwards rotated supreme base along the articulated shaft, the screw rod joint was in first recess.

Furthermore, the lower base is provided with a chamfer matched with the first groove, and one end of the screw rod is hinged with the outer wall of the chamfer of the lower base. The chamfer of base sets up on the one hand in this application and is more convenient to link to each other with the screw rod, and on the other hand inject the rotation direction of screw rod and be that the opening direction of the first recess of elm is unanimous, after screw rod other end joint in first recess, the screw rod is whole vertical rather than the slope, more does benefit to the inseparable combination of upper and lower base like this.

The sealing positioning mechanism comprises a convex block and a second groove which are matched, the convex block is arranged at one end of the upper base close to the lower base, and the convex block is arranged between the first conductive part and the pressing mechanism; the second groove is arranged at one end, close to the upper base, of the lower base, and the second groove is arranged between the second conductive part and the pressing mechanism. The effect of sealed positioning mechanism in this application plays sealed effect to the battery on the one hand, and on the other hand plays the positioning action for upper and lower base combines inseparabler.

Furthermore, a sealing ring is arranged at the bottom end of the second groove.

Furthermore, the first conductive part is a first copper column, the second conductive part is a second copper column, the upper base comprises a first through hole for the first copper column to pass through, the lower base comprises a second through hole for the second copper column to pass through, and the second copper column and the second through hole are matched to form the accommodating cavity.

Furthermore, a first internal thread is arranged on the inner wall of the first through hole, and a first external thread matched with the first internal thread is arranged on the outer wall of the first copper pillar; and a second internal thread is arranged on the inner wall of the second through hole, and a second external thread matched with the second internal thread is arranged on the outer wall of the second copper column. First copper post and second copper post are respectively in upper base, lower base threaded connection in this application for the device can be applicable to the lithium cell test of different thickness sizes and use, can be according to the extrusion pressure degree of test condition control to the battery.

The battery further comprises a spring, wherein the spring is placed in the accommodating cavity, one end of the spring is abutted to the second conductive part, and the other end of the spring enables the battery to be abutted to the first conductive part. The spring in the application has the functions that on one hand, the battery is tightly connected with the first conducting part and the second conducting part; on the other hand, the battery deformation caused by excessive extrusion on the battery in the test process is effectively prevented, and the test accuracy is influenced.

The connecting frame comprises a first connecting body and a second connecting body which are arranged in parallel, the first connecting body is connected with the second connecting body through a plurality of fixing screws, a plurality of first test copper sheets are arranged at one end, close to the second connecting body, of the first connecting body, a plurality of second test copper sheets are arranged at one end, close to the second connecting body, of the second connecting body, the first test copper sheets and the second test copper sheets are arranged in a one-to-one correspondence mode, the first test copper sheets are in butt joint with the upper end of the upper base, and the second test copper sheets are in butt joint with the bottom end of the lower base.

The beneficial effect of this application is as follows:

1. the upper base and the lower base of the lithium battery testing mold are in non-rotating contact, and compared with a common screw connection device, the device does not cause adverse effects such as torque and the like on the internal structure of the battery, so that the measurement is more accurate;

2. the test mould has the advantages of integration, no need of additional mounting tools, no pollution, low cost and the like through the hinged connection mode of the screw and the lower base;

3. in the application, the chamfer angle of the lower base is more convenient to be connected with the screw rod on one hand, and the rotation direction of the screw rod is limited to be consistent with the opening direction of the first groove of the elm on the other hand;

4. in the application, the first copper column and the second copper column are respectively in threaded connection with the upper base and the lower base, so that the device can be suitable for testing lithium batteries with different thickness and sizes, and the squeezing pressure of the batteries can be controlled according to testing conditions;

5. the spring in the application has the functions that on one hand, the battery is tightly connected with the first conducting part and the second conducting part; on the other hand, the battery deformation caused by excessive extrusion on the battery in the test process is effectively prevented, and the test accuracy is influenced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a top view of an upper base of the present application;

FIG. 2 is a top view of a sub-mount of the present application;

FIG. 3 is a schematic view of the hinged connection of the lower base and the shaft portion of the present application;

FIG. 4 is a schematic structural diagram of first and second copper pillars in the present application;

fig. 5 is a schematic structural diagram of a lithium battery testing mold according to the present application;

FIG. 6 is a schematic structural diagram of another lithium battery testing mold according to the present application;

fig. 7 is a schematic structural diagram of a connection frame in the present application.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

An integrated lithium battery test mold, as shown in fig. 1-6, comprises: the device comprises an upper base 1, a lower base 2 and a pressing mechanism 3, wherein the upper base 1 comprises a first conductive part 11, and the first conductive part 11 is penetratingly arranged in the upper base 1 in the vertical direction; the lower base 2 comprises a second conductive part 21, the second conductive part 21 is penetratingly arranged in the lower base 2 in the vertical direction, and an accommodating cavity 4 for accommodating a battery 5 is arranged between the upper base 1 and the lower base 2; the pressing mechanism 3 is arranged at the periphery of the first conductive part 11 and the second conductive part 21, the pressing mechanism 3 comprises a rod-shaped part 31 arranged in the vertical direction, the upper base 1 can move up and down along the rod-shaped part 31, the pressing mechanism 3 further comprises an adjusting part 32, and the adjusting part 32 is used for adjusting the distance between the upper base 1 and the lower base 2; after the pressing mechanism 3 makes the upper base 1 and the lower base 2 abut against each other, the upper and lower ends of the battery 5 are electrically connected to the first conductive part 11 and the second conductive part 21, respectively.

In another embodiment, as shown in fig. 5, on the basis of the first embodiment, the rod-shaped portion 31 is a screw 311, the adjusting portion 32 is a nut 321, the nut 321 moves up and down along the screw 311, one end of the screw 311 is hinged to the lower base 2, and the upper base 1 is provided with a connecting portion 12 which is matched with the pressing mechanism 3. The connecting portion 12 includes a first groove 121 disposed in cooperation with the screw 311, and when the screw 311 rotates upward to the upper base 1 along the hinge shaft, the screw 311 is engaged with the first groove 121. The lower base 2 is provided with a chamfer 22 matched with the first groove 121, and one end of the screw 311 is hinged with the outer wall of the chamfer 22 of the lower base 2.

In another embodiment, on the basis of the first embodiment, as shown in fig. 5, the sealing and positioning mechanism 6 is further included, the sealing and positioning mechanism 6 includes a bump 61 and a second groove 62 which are cooperatively arranged, the bump 61 is arranged at one end of the upper base 1 close to the lower base 2, and the bump 61 is arranged between the first conductive part 11 and the pressing mechanism 3; the second groove 62 is disposed at one end of the lower base 2 close to the upper base 1, and the second groove 62 is disposed between the second conductive portion 21 and the pressing mechanism 3. The bottom end of the second groove 62 is provided with a sealing ring.

In another embodiment, based on the first embodiment, as shown in fig. 5 to 6, the first conductive portion 11 is a first copper pillar 111, the second conductive portion 21 is a second copper pillar 211, the upper base 1 includes a first through hole for the first copper pillar 111 to pass through, the lower base 2 includes a second through hole for the second copper pillar 211 to pass through, and the second copper pillar 211 and the second through hole cooperate to form the receiving cavity 4. A first internal thread is arranged on the inner wall of the first through hole, and a first external thread matched with the first internal thread is arranged on the outer wall of the first copper column 111; the inner wall of the second through hole is provided with a second internal thread, and the outer wall of the second copper column 211 is provided with a second external thread matched with the second internal thread.

In another embodiment, as shown in fig. 6, the battery pack further includes a spring 7, the spring 7 is placed in the accommodating chamber 4, one end of the spring 7 abuts against the second conductive portion 21, and the other end of the spring 7 abuts against the battery 5 against the first conductive portion 11.

In another embodiment, on the basis of the first embodiment, as shown in fig. 7, the connecting frame 8 is further included, the connecting frame 8 includes a first connecting body 81 and a second connecting body 82 which are arranged in parallel, the first connecting body 81 is connected with the second connecting body 82 through a plurality of fixing screws 83, one end of the first connecting body 81 close to the second connecting body 82 is provided with a plurality of first test copper sheets 91, one end of the second connecting body 82 close to the second connecting body 82 is provided with a plurality of second test copper sheets 92, the first test copper sheets 91 are arranged in one-to-one correspondence with the second test copper sheets 92, the first test copper sheets 91 are abutted against the upper end of the upper base 1, and the second test copper sheets 92 are abutted against the bottom end of the lower base 2.

When the testing mold for the lithium battery 5 is used, the first copper column 111 and the second copper column 211 are respectively screwed on the upper base 2 and the lower base 2 through threads, the spring 7 is placed in the accommodating cavity 4 and is placed in a glove box, the battery 5 is sequentially closed according to a negative cover, a cushion block, a lithium sheet, a diaphragm, electrolyte, a positive material and a positive cover, the positive sheet is placed on the spring 7 upwards, the upper base 1 is closed, then the screw 311 on the lower base 2 is upwards turned until the screw 311 is clamped in the first groove 121 in the upper base 1, the nut 321 on the screw 311 is rotated to tightly press the upper base 2 and the lower base 2, the whole device is sealed due to the existence of the sealing ring, the upper base 1 and the lower base 2 are made of non-conducting materials, the first copper column 111 and the second copper column 111 can be respectively regarded as two poles of the battery 5 when being in contact with the battery 5, and the battery 5 can be separated from the external environment even if sealing treatment is not needed, is not influenced by air, is convenient for analyzing the electrochemical reaction process, and the shell of the battery 5 can be recycled. After the completion of the sealing, the glove box was taken out. The height between the first connecting body 81 and the second connecting body 82 is adjusted by the fixing screw 83, the assembled testing mold is clamped between the first testing copper sheet 91 and the second testing copper sheet 92 of the testing frame, the second copper column 211 is connected with the negative electrode, the first copper column 111 is connected with the positive electrode, the testing frame is connected with a computer for charging and discharging tests, and the computer obtains the testing data of the battery 5.

It is understood that the upper and lower base 2 are both made of PP-R material;

it is understood that the first and second copper cylinders are made of brass;

it can be understood that the first copper column and the second copper column are formed by connecting an upper part and a lower part, one part is a cylinder, external threads are arranged outside the cylinder, the other part is a hexagonal prism, the bottom surface is hexagonal, the cross section area of the hexagonal prism is larger than that of the cylinder, and when the cylinder penetrates through the through hole, the cylinder is clamped on the outer sides of the upper base and the lower base;

it is understood that the number of the pressing mechanisms 3 is not fixed, and may be one, two or even more, and may be determined according to specific tests;

it will be appreciated that the test frame is an acrylic plate with the first connecting body 81 and the second connecting body 82.

It will be appreciated that the hinged connection of the sub-base 2 and the rod 31 is a common hinged connection.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. The utility model provides an integral type lithium cell test mould which characterized in that includes:

an upper base including a first conductive portion disposed in the upper base to penetrate therethrough in a vertical direction;

the lower base comprises a second conductive part, the second conductive part is arranged in the lower base in a penetrating manner in the vertical direction, and an accommodating cavity for accommodating a battery is arranged between the upper base and the lower base;

the pressing mechanism is arranged on the peripheries of the first conductive part and the second conductive part and comprises a rod-shaped part arranged in the vertical direction, the upper base can move up and down along the rod-shaped part, and the pressing mechanism further comprises an adjusting part used for adjusting the distance between the upper base and the lower base;

after the upper base and the lower base are abutted by the pressing mechanism, the upper end and the lower end of the battery are respectively in electric communication with the first conductive part and the second conductive part.

2. The integrated lithium battery testing mold according to claim 1, wherein the rod-shaped portion is a screw, the adjusting portion is a nut, the nut moves up and down along a screw direction, one end of the screw is hinged to the lower base, and the upper base is provided with a connecting portion matched with the pressing mechanism.

3. The integrated lithium battery testing mold according to claim 2, wherein the connecting portion comprises a first groove disposed in cooperation with the screw, and the screw is engaged with the first groove when the screw is rotated upward along the hinge shaft to the upper base.

4. The integrated lithium battery testing mold according to claim 3, wherein the lower base is provided with a chamfer matched with the first groove, and one end of the screw is hinged with the outer wall of the chamfer of the lower base.

5. The integrated lithium battery testing mold according to claim 1, further comprising a sealing and positioning mechanism, wherein the sealing and positioning mechanism comprises a bump and a second groove which are matched with each other, the bump is arranged at one end of the upper base close to the lower base, and the bump is arranged between the first conductive part and the pressing mechanism; the second groove is arranged at one end, close to the upper base, of the lower base, and the second groove is arranged between the second conductive part and the pressing mechanism.

6. The integrated lithium battery testing mold according to claim 5, wherein a sealing ring is arranged at the bottom end of the second groove.

7. The integrated lithium battery testing mold according to claim 1, wherein the first conductive part is a first copper pillar, the second conductive part is a second copper pillar, the upper base comprises a first through hole for the first copper pillar to pass through, the lower base comprises a second through hole for the second copper pillar to pass through, and the second copper pillar and the second through hole cooperate to form the accommodating cavity.

8. The integrated lithium battery testing mold according to claim 7, wherein the inner wall of the first through hole is provided with a first internal thread, and the outer wall of the first copper pillar is provided with a first external thread matched with the first internal thread; and a second internal thread is arranged on the inner wall of the second through hole, and a second external thread matched with the second internal thread is arranged on the outer wall of the second copper column.

9. The integrated lithium battery testing mold according to claim 1, further comprising a spring, wherein the spring is placed in the accommodating cavity, one end of the spring abuts against the second conductive part, and the other end of the spring abuts against the battery and the first conductive part.

10. The integrated lithium battery testing mold according to claim 1, further comprising a connecting frame, wherein the connecting frame comprises a first connecting body and a second connecting body which are arranged in parallel, the first connecting body is connected with the second connecting body through a plurality of fixing screws, a plurality of first testing copper sheets are arranged at one end of the first connecting body close to the second connecting body, a plurality of second testing copper sheets are arranged at one end of the second connecting body close to the second connecting body, the first testing copper sheets and the second testing copper sheets are arranged in a one-to-one correspondence manner, the first testing copper sheets are abutted against the upper end of the upper base, and the second testing copper sheets are abutted against the bottom end of the lower base.

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