Battery cell test piece

Abstract

The embodiment of the utility model provides a kind of electric core test piece, it is related to electric core test equipment technical field.The utility model provides a kind of electric core test piece, relative to traditional crocodile test clamp, by setting connecting body and connecting piece, it is electrically connected to pole under the synergic action of two components, without welding bai piece to pole, avoid the particulate and the hole of violent that the process of welding bai piece generates, will not make the increase of electric core resistance and the abnormality of temperature when testing, make the testing process more stable;Meanwhile, the present application omits the process of welding bai piece relative to prior art, low in cost, easy to operate, optimizes electric core test procedure;Meanwhile, compared with the copper conductive forceps mouth of crocodile test clamp exposed in prior art, the connecting piece of the utility model is arranged in the recess inside connecting body, safer.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing equipment technology, and more specifically, to a battery cell testing device. Background Technology

[0002] Temperature has a significant impact on lithium-ion cells in related technologies. In the electrical performance testing stage of lithium-ion cells, the test temperature is particularly important. Excessive temperature can lead to a decrease in resistance, higher discharge capacity and energy efficiency, and thus affect the test accuracy.

[0003] Currently, most testing methods for lithium-ion cells involve soldering a electrode plate onto the terminal block of the lithium-ion cell, and then connecting the electrode plate to the testing equipment using alligator clips and test leads. However, this method often results in abnormal temperature rises during testing, leading to inaccurate test data. Utility Model Content

[0004] The purpose of this invention is to provide a battery cell testing component that eliminates the need for welding tabs to the terminals, thereby optimizing the battery cell testing process.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a battery cell testing device for electrically connecting the terminals of a battery cell to an external testing device, comprising:

[0007] A connecting body, wherein the connecting body is provided with a groove;

[0008] A connector is fitted into the groove and is movably disposed along the extension direction of the groove. The connector is electrically connected to an external testing device.

[0009] When the cell test piece is connected to the terminal post, the terminal post is fitted into the groove, the connector is limited to the connector body, and the terminal post abuts against the connector.

[0010] In an optional embodiment, the connector is connected to the connecting body via a first elastic member, one end of which is connected to the side wall of the connector and the other end is connected to the connecting body.

[0011] When the cell test piece is connected to the terminal post, the terminal post abuts against the connector, and the first elastic member is in a compressed state.

[0012] In an optional embodiment, the connecting body includes a first body and a second body, the first body and the second body are hinged together, the first body has a first slot on the side facing the second body, and the second body has a second slot on the side facing the first body.

[0013] The first body and the second body are closed, and the first slot and the second slot form the groove.

[0014] In an optional embodiment, the first body includes a first handle and a first clip, the first clip being provided with the first slot, and the first handle being connected to the first clip and extending toward a first direction;

[0015] The second body includes a second handle and a second clamping piece, the second clamping piece being provided with the second slot, the second handle being connected to the second clamping piece and extending toward the second direction;

[0016] The first direction and the second direction are set at an angle.

[0017] In an optional embodiment, the connecting body includes a hinge portion, and the first body and the second body are respectively connected to the hinge portion;

[0018] The other end of the first elastic element is connected to the hinge portion.

[0019] In an optional embodiment, the connecting body further includes a second elastic member, with a first end connected to the side wall of the first handle and the other end connected to the side wall of the second handle.

[0020] In an optional embodiment, the second elastic member is provided with an insulating sleeve;

[0021] And / or, the first body and the second body are made of insulating materials.

[0022] In an optional embodiment, the inner wall of the first slot of the first body is provided with a protruding first jaw portion;

[0023] The inner wall of the second slot of the second body is provided with a protruding second jaw.

[0024] In an optional embodiment, the first elastic element and the connecting element are metal structures, and the first elastic element is electrically connected to the external testing equipment via a wire.

[0025] In an optional embodiment, the groove includes at least a conical groove; when the cell test piece is connected to the terminal post, the terminal post is fitted into the groove, the outer edge of the connector is limited and abutted against the inner wall of the connector body, and the terminal post abuts against the connector.

[0026] Alternatively, the groove may include at least one of a columnar groove, a rectangular groove, or a rhomboid groove, and the inner wall of the connecting body may be provided with a limiting part; when the cell test piece is connected to the electrode post, the electrode post is fitted into the groove, the connecting piece is limited and connected to the limiting part, and the electrode post abuts against the connecting piece.

[0027] The beneficial effects of the battery cell test piece provided in this embodiment of the invention include:

[0028] Compared to traditional alligator test clips, this application uses a connecting body and a connector to electrically connect the terminals through the synergistic action of the two components. This eliminates the need for welding tabs to the terminals, avoiding the particles and pinholes generated during the welding process. This prevents an increase in the cell's internal resistance and abnormal temperature during testing, resulting in a more stable testing process. Furthermore, this application eliminates the welding tab process compared to existing technologies, reducing costs, simplifying operation, and optimizing the cell testing process. Additionally, unlike the exposed copper conductive jaws of existing alligator test clips, the connector in this application is located inside a groove in the connecting body, providing greater safety. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the connection between the battery cell test piece and the battery cell terminal provided in this embodiment;

[0031] Figure 2 This is a schematic diagram of the structure of the battery cell test piece provided in this embodiment;

[0032] Figure 3 This is a cross-sectional view of the battery cell test piece provided in this embodiment.

[0033] Icons: 010-Cell test piece; 100-Connecting body; 101-Groove; 110-First body; 111-First slot; 112-First handle; 113-First clamping piece; 114-First jaw; 120-Second body; 121-Second slot; 122-Second handle; 123-Second clamping piece; 124-Second jaw; 130-Second elastic element; 131-Insulating sleeve; 140-Hinge; 200-Connector; 300-First elastic element; 400-Wire; 020-Cell; 021-Terminal. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0039] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0040] The following describes in detail the overall structure, working principle, and technical effects of the battery cell test piece 010 provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0041] In related technologies, testing of lithium-ion battery cells (020) typically involves welding a electrode plate to the 021 terminal and connecting the electrode plate to the cell using alligator clips. However, during the welding process, particles and pores generated during welding not only increase the internal resistance of the cell (020) but may also cause a continuous rise in temperature during testing. Furthermore, the welding process itself may damage the electrode plate, leading to increased internal resistance and abnormal temperature rise. Therefore, welding the electrode plate to the 021 terminal of the cell (020) is not only cumbersome but also introduces impurities during testing, resulting in inaccurate test results.

[0042] Please refer to Figure 1 The battery cell test piece 010 provided by this utility model is used to electrically connect the terminal 021 of the battery cell 020 to an external test device, thereby optimizing the battery cell 020 test process.

[0043] Please refer to Figures 1-3 The present invention provides a battery cell test piece 010, comprising:

[0044] Connecting body 100, the connecting body 100 is provided with groove 101;

[0045] The connector 200 is fitted into the groove 101 and is movable along the extension direction of the groove 101. The connector 200 is electrically connected to the external testing equipment.

[0046] With the cell test piece 010 connected to the terminal 021, the terminal 021 is fitted into the groove 101, the connector 200 is limited to the connector body 100, and the terminal 021 abuts against the connector 200.

[0047] Understandably, when the cell test piece 010 is connected to the terminal 021, the terminal 021 is fitted into the groove 101, and the cell test piece 010 is pressed towards the terminal 021 until the connector 200 is in a limited connection with the connector body 100. At this time, the terminal 021 abuts against the connector 200, thereby realizing the electrical connection between the cell test piece 010 and the terminal 021, and then realizing the electrical connection between the terminal 021 and the external test equipment through the cell test piece 010. Compared to traditional alligator test clips, this application uses a connecting body 100 and a connector 200 to electrically connect the electrode post 021 through the synergistic action of the two components. This eliminates the need for welding tabs to the electrode post 021, avoiding the particles and pores generated during the welding process. This prevents an increase in the internal resistance of the cell 020 and abnormal temperature during testing, resulting in a more stable testing process. Furthermore, this application eliminates the welding tab process compared to existing technologies, reducing costs, simplifying operation, and optimizing the cell 020 testing process. Additionally, compared to the exposed copper conductive jaws of alligator test clips in existing technologies, the connector 200 of this application is located inside the groove 101 of the connecting body 100, providing greater safety.

[0048] In this embodiment, the cell test piece 010 also includes a first elastic member 300.

[0049] In this embodiment, please refer to Figure 3 The connector 200 is connected to the connector body 100 through the first elastic member 300. One end of the first elastic member 300 is connected to the side wall of the connector 200, and the other end is connected to the connector body 100.

[0050] When the cell test piece 010 is connected to the terminal 021, the terminal 021 abuts against the connector 200, and the first elastic member 300 is in a compressed state.

[0051] Optionally, the first elastic element 300 can be a spring or sheet structure made of metal.

[0052] In this embodiment, the first elastic element 300 and the connecting element 200 are metal structures, and the first elastic element 300 is electrically connected to the external testing equipment through the wire 400.

[0053] Understandably, with the cell test piece 010 connected to the terminal 021, the terminal 021 is fitted into the groove 101. The cell test piece 010 is pressed towards the terminal 021 until the connector 200 and the connector body 100 are in a limited connection. At this point, the terminal 021 and the connector 200 abut against each other. The first elastic element 300 is in a compressed state, and under the elastic force of the first elastic element 300, the connector 200 and the terminal 021 are in tight contact, thus forming a stable conductive path between the terminal 021, the connector 200, and the external testing equipment. After the test is completed, the connector body 100 is removed, the first elastic element 300 resets, and the connecting piece moves and resets under the action of the first elastic element 300. Therefore, by providing the first elastic element 300, the connector 200 can move along the extension direction of the groove 101 under the elastic force of the first elastic element 300, thereby realizing the movable setting of the connector 200 along the extension direction of the groove 101; at the same time, the first elastic element 300 can provide the connector 200 with a stable pushing force and pulling force, so that the connector 200 and the pole post 021 are in close contact, thereby forming a stable conductive path between the pole post 021, the connector 200 and the external testing equipment.

[0054] Of course, in other embodiments, the connecting body 100 may also have a limiting annular groove with a certain distance in the groove 101, and the connecting member 200 may be limited in the limiting annular groove; at the same time, the connecting member 200 may move in the limiting annular groove along the extension direction of the limiting annular groove.

[0055] In this embodiment, please refer to Figures 2-3 The connecting body 100 includes a first body 110 and a second body 120. The first body 110 and the second body 120 are hinged together. The first body 110 has a first slot 111 on the side facing the second body 120, and the second body 120 has a second slot 121 on the side facing the first body 110.

[0056] The first body 110 and the second body 120 are closed, and the first slot 111 and the second slot 121 form a groove 101.

[0057] Understandably, the hinged first body 110 and second body 120 can be clamped on the terminal 021 of the battery cell 020. During the testing of the battery cell 020, the battery cell test piece 010 can clamp the terminal 021 of the battery cell 020 more stably and is also convenient to operate; at the same time, it can be applied to various types of battery cells 020.

[0058] In this embodiment, please refer to Figures 2-3The connecting body 100 includes a hinge portion 140, and the first end of the first body 110 and the first end of the second body 120 are respectively connected to the hinge portion 140; the other end of the first elastic member 300 is connected to the hinge portion 140.

[0059] In this embodiment, please refer to Figures 2-3 The first body 110 includes a first handle 112 and a first clip 113. The first clip 113 is provided with a first slot 111. The first handle 112 is connected to the first clip 113 and extends toward a first direction. The second body 120 includes a second handle 122 and a second clip 123. The second clip 123 is provided with a second slot 121. The second handle 122 is connected to the second clip 123 and extends toward a second direction. The first direction and the second direction are set at an angle.

[0060] Optionally, the first handle 112 and the first body 110 are integrally formed, and the second handle 122 and the second body 120 are integrally formed; then the hinge portion 140 can be a hinge shaft that passes through the first body 110 and the second body 120.

[0061] Understandably, the operator can open the first clip 113 and the second clip 123 by squeezing the first handle 112 and the second handle 122. After aligning the connecting piece with the terminal 021 of the battery cell 020, the operator can release the first handle 112 and the second handle 122, and the first clip 113 and the second clip 123 will close and clamp the terminal 021. This configuration of the connecting body 100 makes it easy to operate.

[0062] In this embodiment, please refer to Figure 3 The connecting body 100 also includes a second elastic member 130, with one end of the second elastic member 130 connected to the side wall of the first handle 112 and the other end connected to the side wall of the second handle 122.

[0063] Optionally, the second elastic element 130 can be a spring or a sheet spring.

[0064] Understandably, when the operator squeezes the first handle 112 and the second handle 122, the second elastic element 130 is compressed; when the operator releases the first handle 112 and the second handle 122, the second elastic element 130 returns to its original position, providing a stable opening and closing force to the first handle 112 and the second handle 122, and the first clamp 113 and the second clamp 123 clamp the electrode post 021; thus, compared with the traditional alligator test clip, the stress applied by this application is stronger, and the first clamp 113 and the second clamp 123 can clamp the electrode post 021 more tightly.

[0065] Alternatively, please refer to Figures 2-3 The second elastic element 130 is covered with an insulating sleeve 131.

[0066] Optionally, the first body 110 and the second body 120 are made of insulating materials. The first body 110 and the second body 120 can be made of rigid insulating material by compression molding, which facilitates operation and ensures the safety of the operator.

[0067] Alternatively, please refer to Figures 2-3 The inner wall of the first slot 111 of the first body 110 is provided with a protruding first jaw portion 114; the inner wall of the second slot 121 of the second body 120 is provided with a protruding second jaw portion 124.

[0068] The first jaw portion 114 is located at the end of the first body 110 and is integrally formed with the first body 110. The first jaw portion 114 can be a serrated jaw or a ring jaw. The second jaw portion 124 is located at the end of the second body 120 and is integrally formed with the second body 120. The second jaw portion 124 can be a serrated jaw or a ring jaw.

[0069] It is understandable that by setting the first jaw portion 114 and the second jaw portion 124, the first clamping piece 113 and the second clamping piece 123 can clamp the pole post 021 more tightly, ensuring the clamping stability of the connecting body 100 on the pole post 021.

[0070] In this embodiment, please refer to Figures 2-3 The groove 101 includes at least a conical groove, and the first slot 111 and the second slot 121 form a conical groove. From the opening end of the connecting body 100 to the handle end, the diameter of the conical groove 101 gradually decreases.

[0071] The connecting piece, which is fitted with a conical groove, can be a circular sheet structure.

[0072] With the cell test piece 010 connected to the terminal 021, the terminal 021 is fitted into the groove 101, the outer edge of the connector 200 is limited and abutted against the inner wall of the connector body 100, and the terminal 021 abuts against the connector 200.

[0073] The first and second pieces can be semi-conical clip structures.

[0074] Of course, in an optional embodiment, the groove 101 includes at least one of a columnar groove, a rectangular groove, and a rhomboid groove, and the first slot 111 and the second slot 121 form the above-mentioned groove 101; the inner wall of the connecting body 100 is provided with a limiting part; under the condition that the cell test piece 010 is connected to the electrode post 021, the electrode post 021 is fitted in the groove 101, the connector 200 is limited and connected with the limiting part, and the electrode post 021 abuts against the connector 200.

[0075] The working principle and process of the battery cell test piece 010 provided in this embodiment of the utility model are as follows:

[0076] The operator squeezes the first handle 112 and the second handle 122, opens the first clip 113 and the second clip 123, and aligns the connecting piece with the terminal 021 of the battery cell 020, so that the connecting piece is in close contact with the terminal 021 under the drive of the first elastic member 300; the operator releases the first handle 112 and the second handle 122, the second elastic member 130 returns to its original position, providing a stable opening and closing force to the first handle 112 and the second handle 122, and the first jaw portion 114 of the first clip 113 and the second jaw portion 124 of the second clip 123 clamp the terminal 021; thereby forming a stable conductive path.

[0077] In summary, the battery cell test piece 010 provided in this embodiment of the present invention, compared with the traditional alligator test clip, electrically connects the electrode 021 by setting up a connecting body 100 and a connector 200, with the two components working together. This eliminates the need for welding tabs to the electrode 021, avoiding the particles and pores generated during the welding process, and preventing an increase in the internal resistance and abnormal temperature of the battery cell 020 during testing, thus making the testing process more stable. Furthermore, compared with the prior art, this application eliminates the welding tab process, resulting in lower costs, simpler operation, and an optimized battery cell 020 testing process. Additionally, compared with the exposed copper conductive jaws of the alligator test clip in the prior art, the connector 200 of this application is located inside the groove 101 of the connecting body 100, which is safer.

[0078] Furthermore, by providing a first elastic element 300, the connector 200 can move along the extension direction of the groove 101 under the elastic force of the first elastic element 300, thereby realizing the movable setting of the connector 200 along the extension direction of the groove 101; at the same time, the first elastic element 300 can provide a stable pushing force and pulling force to the connector 200, so that the connector 200 and the pole post 021 are in close contact, thereby forming a stable conductive path between the pole post 021, the connector 200 and the external testing equipment.

[0079] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell testing device, characterized in that, Used for electrically connecting the terminals of the battery cell to external testing equipment, including: A connecting body, wherein the connecting body is provided with a groove; A connector is fitted into the groove and is movably disposed along the extension direction of the groove. The connector is electrically connected to an external testing device. When the cell test piece is connected to the terminal post, the terminal post is fitted into the groove, the connector is limited to the connector body, and the terminal post abuts against the connector.

2. The cell test piece according to claim 1, characterized in that, The connector is connected to the connecting body via a first elastic element, one end of which is connected to the side wall of the connector and the other end of which is connected to the connecting body. When the cell test piece is connected to the terminal post, the terminal post abuts against the connector, and the first elastic member is in a compressed state.

3. The cell test piece according to claim 2, characterized in that, The connecting body includes a first body and a second body. The first body is hinged to the second body. The first body has a first slot on the side facing the second body, and the second body has a second slot on the side facing the first body. The first body and the second body are closed, and the first slot and the second slot form the groove.

4. The cell test piece according to claim 3, characterized in that, The connecting body includes a hinge portion, and the first body and the second body are respectively connected to the hinge portion; The other end of the first elastic element is connected to the hinge portion.

5. The cell test piece according to claim 3, characterized in that, The first body includes a first handle and a first clip, the first clip is provided with the first slot, the first handle is connected to the first clip and extends toward the first direction; The second body includes a second handle and a second clamping piece, the second clamping piece being provided with the second slot, the second handle being connected to the second clamping piece and extending toward the second direction; The first direction and the second direction are set at an angle.

6. The cell test piece according to claim 5, characterized in that, The connecting body also includes a second elastic element, with a first end connected to the side wall of the first handle and the other end connected to the side wall of the second handle.

7. The cell test piece according to claim 6, characterized in that, The second elastic element is fitted with an insulating sleeve. And / or, the first body and the second body are made of insulating materials.

8. The cell test piece according to claim 3, characterized in that, The inner wall of the first slot of the first body is provided with a protruding first jaw portion; The inner wall of the second slot of the second body is provided with a protruding second jaw.

9. The cell test piece according to claim 2, characterized in that, The first elastic element and the connecting element are metal structures, and the first elastic element is electrically connected to the external testing equipment through a wire.

10. The cell test piece according to claim 2, characterized in that, The groove includes at least a conical groove; when the cell test piece is connected to the electrode post, the electrode post is fitted into the groove, the outer edge of the connector is limited and abutted against the inner wall of the connector body, and the electrode post abuts against the connector. Alternatively, the groove may include at least one of a columnar groove, a rectangular groove, or a rhomboid groove, and the inner wall of the connecting body may be provided with a limiting part; when the cell test piece is connected to the electrode post, the electrode post is fitted into the groove, the connecting piece is limited and connected to the limiting part, and the electrode post abuts against the connecting piece.

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