Testing device and testing system

Abstract

The utility model provides a test device and a test system. The testing device comprises a charging and discharging device and a connecting assembly. The connecting assembly comprises a connecting piece and a heat dissipation structure, the charging and discharging device is electrically connected with the connecting piece, the connecting piece is used for being electrically connected with the battery monomers, and the heat dissipation structure is arranged on the connecting piece. The reliability of the battery monomer can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a testing device and testing system. Background Technology

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and rechargeable alkaline zinc-manganese battery cells, among others.

[0003] In the development of battery technology, improving the reliability of individual battery cells has always been a research direction. Utility Model Content

[0004] In view of the above problems, this application provides a testing device and testing system that can improve the reliability of individual battery cells.

[0005] In a first aspect, this application provides a testing apparatus, which includes a charging / discharging device and a connection assembly. The connection assembly includes a connector and a heat dissipation structure. The charging / discharging device is electrically connected to the connector, and the connector is used for electrical connection with a single battery cell. The heat dissipation structure is disposed on the connector.

[0006] In the above solution, a heat dissipation structure is set on the connector to dissipate heat from the connector, thereby reducing the temperature of the connector during the verification process. This reduces the possibility of the connector melting at the connection with the charging and discharging device and the battery cell, reduces the risk of thermal runaway of the battery cell, improves the reliability of the verification results, and improves the reliability of the battery cell.

[0007] In some embodiments, the connector includes a first connection end and a second connection end connected to each other. The first connection end is electrically connected to the charging and discharging device, and the second connection end is used to be electrically connected to a battery cell. A heat dissipation structure is provided at least at the first connection end.

[0008] In the above scheme, placing the heat dissipation structure at the first connection end helps to reduce the temperature of the connector and also reduces the space occupied by the heat dissipation structure on the connector, thereby minimizing the size of the connector, reducing the resistance of the connector, and improving the charging and discharging test efficiency.

[0009] In some embodiments, the heat dissipation structure includes a heat sink, which is disposed on at least one side of the first connection end along the thickness direction of the connector.

[0010] In the above scheme, by setting up a heat sink, the structure of the heat dissipation structure is simplified, the manufacturing difficulty of the heat dissipation structure is reduced, and the manufacturing cost of the heat dissipation structure is reduced.

[0011] In some embodiments, the thermal conductivity of the heat sink is greater than that of the connector, thereby increasing the heat dissipation capacity of the heat dissipation structure, dissipating the heat generated at the first connection end in a timely manner, reducing the risk of heat conduction to the battery cell leading to thermal runaway of the battery cell, and reducing the manufacturing cost of the connector.

[0012] In some embodiments, the heat dissipation structure includes a fan with its air outlet facing the heat sink. The fan can further improve the heat dissipation efficiency of the heat sink, thereby improving the overall heat dissipation performance of the heat dissipation structure, further reducing the heat generated by the connectors during the test, and improving the reliability of the test process.

[0013] In some embodiments, the heat dissipation structure includes a fan with the fan outlet facing the first connection end. The fan can further improve the heat dissipation efficiency of the first connection end, thereby improving the overall heat dissipation performance of the heat dissipation structure, further reducing the heat generated by the connector during the test, and improving the reliability of the test process.

[0014] In some embodiments, the dimension of the first connecting end along the width direction is greater than the dimension of the second connecting end along the width direction.

[0015] In the above scheme, it is beneficial to increase the overcurrent capacity of the first connection terminal and reduce the resistance of the first connection terminal, thereby reducing the heat generated during the charging and discharging process when the first connection terminal is electrically connected to the charging and discharging device, thus reducing the impact on the battery cells and improving the reliability of the testing process.

[0016] In some embodiments, the connector includes a first connecting end, a second connecting end, and a bent section, wherein the first connecting end and the second connecting end are connected by the bent section, and the bent section is bent relative to at least one of the first connecting end and the second connecting end.

[0017] In the above scheme, by setting up bending sections, the flexibility of the connector arrangement is improved, and the applicability of the connector is expanded.

[0018] In some embodiments, the bending section is provided with a fuse, which disconnects the electrical connection between the charging and discharging device and the battery cell when an abnormal increase in heat occurs during the test, thereby reducing the risk of thermal runaway of the battery cell due to abnormal heat increase or other factors, improving the reliability of the test process, and improving the reliability of the battery cell.

[0019] In some embodiments, the bent segment is bent relative to both the first connecting end and the second connecting end. The dimension of the first connecting end along its own extending direction is larger than the dimension of the second connecting end along its own extending direction.

[0020] In the above scheme, the extension dimension of the first connection end is greater than that of the second connection end, so that the current carrying capacity of the first connection end is greater than that of the second connection end. In addition, it can also increase the arrangement space for the heat dissipation structure and improve the heat dissipation performance of the connector.

[0021] In some embodiments, the thickness of the first connection end is greater than or equal to the thickness of the second connection end.

[0022] In the above scheme, the thickness of the first connecting end is greater than the thickness of the second connecting end, making the resistance of the first connecting end less than that of the second connecting end. This reduces the heat generated by the first connecting end during testing, thereby reducing the overall heat generated by the connector during testing and improving the reliability of the testing process. The equal thickness of the first and second connecting ends allows them to be integrally molded, reducing the difficulty of connector fabrication and improving fabrication efficiency.

[0023] In some embodiments, the connector includes a body and a conductive layer covering the body, wherein the conductivity of the conductive layer is greater than that of the body, thereby improving the overall conductivity of the connector.

[0024] In some embodiments, the main body is made of aluminum and the conductive layer is made of silver, which improves the overall conductivity of the connector while reducing the overall manufacturing cost of the connector.

[0025] Secondly, embodiments of this application provide a testing system, including the testing apparatus in any of the foregoing embodiments.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a testing device provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the structure of another testing device provided in the embodiments of this application;

[0030] Figure 3This is a schematic diagram of the structure of a connector in a testing device provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment;

[0032] Figure 5 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment;

[0033] Figure 6 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment.

[0034] Marker description

[0035] 100. Testing equipment; 200. Battery cell; 210. Electrode terminals;

[0036] 10. Charging and discharging device;

[0037] 20. Connecting component; 21. Connector; 211. First connecting end; 212. Second connecting end; 213. Bending section; 213a. Fusible part; 214. Main body; 215. Conductive layer; 22. Heat dissipation structure; 221. Heat sink; 222. Fan;

[0038] 30. High-voltage lines;

[0039] X represents the width direction; Z represents the thickness direction. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0049] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0050] With the development of battery technology, battery cells are being used in more and more fields, and are gradually replacing traditional fossil fuels in the automotive power sector. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy.

[0051] The requirements for the cycle life, operating voltage, and operating current of battery cells in electrical devices are becoming increasingly stringent. In order to verify the various performance characteristics of battery cells, it is often necessary to use testing equipment to verify the performance of battery cells.

[0052] Typically, during the verification process, the charging and discharging devices and battery cells in the test setup are electrically connected via a connection structure. However, during verification, the current passing through the connection structure generates heat, especially during fast charging and discharging. As the temperature of the connection structure itself rises, it not only poses a risk of melting at the connection points between the connection structure and the charging and discharging devices and battery cells, but the temperature of the connection structure itself can also cause the temperature of the battery cells to rise, leading to thermal runaway. This reduces the reliability of both the verification results and the battery cell reliability.

[0053] Based on the above-mentioned technical problems, this application provides a technical solution that provides heat dissipation by setting a heat dissipation structure on the connector to dissipate heat from the connector, thereby reducing the temperature of the connector during the verification process, thereby reducing the possibility of melting at the connection between the connector and the charging and discharging device and the battery cell, reducing the risk of thermal runaway of the battery cell, improving the reliability of the verification results, and improving the reliability of the battery cell.

[0054] Figure 1 This is a schematic diagram of the structure of a testing device provided in an embodiment of this application.

[0055] Please see Figure 1 This application provides a testing device 100, which includes a charging / discharging device 10 and a connecting assembly 20. The connecting assembly 20 includes a connector 21 and a heat dissipation structure 22. The charging / discharging device 10 is electrically connected to the connector 21, and the connector 21 is used to be electrically connected to a battery cell 200. The heat dissipation structure 22 is disposed on the connector 21.

[0056] The testing device 100 can perform charge and discharge tests on the battery cell 200, and the charge and discharge device 10 in the testing device 100 can realize the charging and discharging process of the battery cell 200. The charge and discharge device 10 is electrically connected to the battery cell 200 through the connecting component 20.

[0057] Optionally, the charging and discharging device 10 includes a high-current fast charging and discharging device. Optionally, the high-current fast charging and discharging device is electrically connected to the connector 21 via a high-voltage line 30.

[0058] The connection assembly 20 includes a connector 21 and a heat dissipation structure 22. The connector 21 may be made of a conductive material. For example, the material of the connector 21 may include aluminum, copper, or other conductive materials.

[0059] Optionally, the connector 21 can be a plate-like structure.

[0060] Optionally, the battery cell 200 includes a positive electrode terminal 210 and a negative electrode terminal 210. The number of connection components 20 may include two, wherein the connector 21 in one connection component 20 electrically connects the positive electrode terminal 210 of the battery cell 200 to the positive electrode of the charging and discharging device 10, and the connector 21 in the other connection component 20 electrically connects the negative electrode terminal 210 of the battery cell 200 to the negative electrode of the charging and discharging device 10.

[0061] Optionally, the connector 21 can be electrically connected to the battery cell 200 by means of welding or other methods.

[0062] Optionally, the heat dissipation structure 22 can be disposed at one end of the connector 21 near the charging / discharging device 10. Alternatively, the heat dissipation structure 22 can also be disposed at one end of the connector 21 near the battery cell 200. Or, the heat dissipation structure 22 can be disposed in the middle region of the connector 21.

[0063] Optionally, the heat dissipation structure 22 can be connected to the connector 21 by means of welding, riveting, bolting, or bonding. Of course, the heat dissipation structure 22 can also be fixed by a connecting bracket.

[0064] In this embodiment of the application, a heat dissipation structure 22 is provided on the connector 21 to dissipate heat from the connector 21, thereby reducing the temperature of the connector 21 during the verification process, thereby reducing the possibility of melting at the connection between the connector 21 and the charging and discharging device 10 and the battery cell 200, reducing the risk of thermal runaway of the battery cell 200, improving the reliability of the verification results, and improving the reliability of the battery cell 200.

[0065] For example, after some battery cells 200 are manufactured, they can be electrically connected to the charging and discharging device 10 in the testing apparatus 100 according to certain rules. For example, a connector 21 with an overall length of 15 cm and a thickness of 3 mm is used to weld to the electrode terminals 210 of the battery cell 200. After welding, the connection structure on the high-voltage line 30 of the charging and discharging device 10 is polished using a polishing device until the surface of the connection structure is smooth, and the connection structure is recorded (e.g., by taking a picture). The polished connection structure is fixed and electrically connected to the connector 21, and the contact internal resistance is measured using a 6.5-digit sensor. Then, the heat dissipation structure 22 is installed to the connector 21, and finally, the test begins. Furthermore, the temperature of each area of ​​the connector 21 can be monitored in real time during the test to improve the reliability of the test process.

[0066] Figure 2 This is a schematic diagram of another testing device provided in the embodiments of this application. Figure 3 This is a schematic diagram of the structure of a connector in a testing device provided in an embodiment of this application. Figure 3 as well as Figures 4 to 6 The heat dissipation structure is not shown.

[0067] In some alternative embodiments, please refer to Figures 1 to 3 The connector 21 includes a first connecting end 211 and a second connecting end 212 connected to each other. The first connecting end 211 is electrically connected to the charging and discharging device 10, and the second connecting end 212 is used to be electrically connected to the battery cell 200. The heat dissipation structure 22 is at least provided on the first connecting end 211.

[0068] In some embodiments, the battery cell 200 is subjected to a high-current fast charging test. The charging and discharging device 10 is electrically connected to the connector 21 via a high-voltage line 30. The temperature generated at the connection point (first connection end 211) between the high-voltage line 30 and the connector 21 is higher than the temperature generated at the connection point (second connection end 212) between the battery cell 200 and the connector 21. Placing the heat dissipation structure 22 at the first connection end 211 helps to reduce the temperature of the connector 21 and also reduces the space occupied by the heat dissipation structure 22 on the connector 21, thereby minimizing the size of the connector 21, thereby reducing the resistance of the connector 21 and improving the charging and discharging test efficiency.

[0069] In some alternative embodiments, please refer to Figure 1 and Figure 2 The heat dissipation structure 22 includes a heat dissipation plate 221, which is disposed on at least one side of the first connecting end 211 along the thickness direction Z of the connecting member 21.

[0070] Optionally, the number of heat sinks 221 may include one or more.

[0071] Optionally, the heat sink 221 extends along a plane perpendicular to the plane where the first connection end 211 is located.

[0072] Optionally, the number of heat sinks 221 may be multiple, and a receiving cavity may be formed between the multiple heat sinks 221, with a heat dissipation fluid, such as water or air, provided inside the receiving cavity.

[0073] Optionally, the material of the heat sink 221 can be the same as that of the connector 21, or it can be different.

[0074] Alternatively, the heat sink 221 can be a thin-walled heat sink fin.

[0075] Optionally, the heat sink 221 can be disposed on one side of the first connecting end 211 along the thickness direction Z of the connector 21. Of course, multiple heat sinks 221 can also be disposed on both sides of the first connecting end 211 along the thickness direction Z of the connector 21.

[0076] Optionally, the heat sink 221 can be connected to the first connection end 211 by means of welding, bonding, snap-fitting, etc.

[0077] The embodiments of this application simplify the structure of the heat dissipation structure 22 by setting up a heat dissipation plate 221, thereby reducing the difficulty and cost of manufacturing the heat dissipation structure 22.

[0078] In some alternative embodiments, the thermal conductivity of the heat sink 221 is greater than that of the connector 21, thereby increasing the heat dissipation capacity of the heat dissipation structure 22, dissipating the heat generated by the first connection end 211 in a timely manner, reducing the risk of heat conduction to the battery cell 200 leading to thermal runaway of the battery cell 200, and reducing the manufacturing cost of the connector 21.

[0079] Optionally, the heat sink 221 and the connector 21 can be made of different materials to change their thermal conductivity.

[0080] Thermal conductivity refers to a material's ability to conduct heat. It is used to quantify the amount of heat transferred by a material per unit area per unit time. When the temperature gradient is 1 K / m, the unit is W / (m·K).

[0081] Thermal conductivity can be obtained by testing according to GB / T 10294-2008.

[0082] In some alternative embodiments, please refer to Figure 1 and Figure 2The heat dissipation structure 22 includes a fan 222, the air outlet of which is set facing the heat sink 221. The fan 222 can further improve the heat dissipation efficiency of the heat sink 221, thereby improving the overall heat dissipation performance of the heat dissipation structure 22, further reducing the heat generated by the connector 21 during the test, and improving the reliability of the test process.

[0083] In some optional embodiments, the heat dissipation structure 22 includes a fan 222, the air outlet of which is disposed facing the first connection end 211. The fan 222 can further improve the heat dissipation efficiency of the first connection end 211, thereby improving the overall heat dissipation performance of the heat dissipation structure 22, further reducing the heat generated by the connector 21 during the test, and improving the reliability of the test process.

[0084] In some alternative embodiments, please refer to Figures 1 to 3 The dimension of the first connecting end 211 along the width direction X is greater than the dimension of the second connecting end 212 along the width direction X.

[0085] Optionally, when the connector 21 is a planar plate structure, the width direction X can be the direction perpendicular to the direction in which the first connecting end 211 and the second connecting end 212 are arranged side by side. When the connector 21 is a bent plate structure, the direction in which the projection of the first connecting end 211 in the thickness direction Z and the projection of the second connecting end 212 in the thickness direction Z are arranged side by side is perpendicular to the width direction X.

[0086] The embodiments of this application, through the above-described settings, are beneficial to increasing the overcurrent capacity of the first connection terminal 211 and reducing the resistance of the first connection terminal 211, thereby reducing the heat generated during the charging and discharging process when the first connection terminal 211 is electrically connected to the charging and discharging device 10, thus reducing the impact on the battery cell 200 and improving the reliability of the testing process.

[0087] In some alternative embodiments, such as Figures 1 to 3 As shown, the connector 21 includes a first connecting end 211, a second connecting end 212, and a bent section 213. The first connecting end 211 and the second connecting end 212 are connected by the bent section 213, and the bent section is bent relative to at least one of the first connecting end 211 and the second connecting end 212.

[0088] In some embodiments, the bent segment 213 is bent relative to both the first connecting end 211 and the second connecting end 212, resulting in a Z-shaped structure for the connector 21. In other embodiments, the bent segment 213 is bent relative to the first connecting end 211. In still other embodiments, the bent segment 213 is bent relative to the second connecting end 212.

[0089] Optionally, one end of the bent segment 213 along its own extension direction is bent relative to the first connecting end 211, and the other end of the bent segment 213 along its own extension direction is bent relative to the second connecting end 212.

[0090] In these alternative embodiments, by providing the bending section 213, the arrangement flexibility of the connector 21 is improved, and the applicability of the connector 21 is increased.

[0091] Figure 4 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment.

[0092] In some alternative embodiments, please refer to Figure 4 The bending section 213 is provided with a fuse part 213a, which disconnects the electrical connection between the charging and discharging device 10 and the battery cell 200 when an abnormal increase in heat occurs during the test. This reduces the risk of thermal runaway of the battery cell 200 due to abnormal heat increase or other factors, improves the reliability of the test process, and improves the reliability of the battery cell 200.

[0093] Alternatively, a groove or through hole can be provided in the bent section 213 to form the fusible portion 213a. Or the width of the bent section 213 can be reduced to form the fusible portion 213a.

[0094] In some alternative embodiments, please refer to Figure 3 and Figure 4 The bent segment 213 is bent relative to both the first connecting end 211 and the second connecting end 212. The dimension of the first connecting end 211 along its own extension direction is larger than the dimension of the second connecting end 212 along its own extension direction.

[0095] It is understood that the first connection end 211 and the second connection end 212 are both two connection areas used to connect with other components or objects. The extension dimension of the first connection end 211 is greater than that of the second connection end 212, so that the current carrying capacity of the first connection end 211 is greater than that of the second connection end 212. In addition, it can also increase the arrangement space for the heat dissipation structure 22 and improve the heat dissipation performance of the connector 21.

[0096] Figure 5 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment.

[0097] In some alternative embodiments, please refer to Figure 5 The thickness of the first connecting end 211 is greater than or equal to the thickness of the second connecting end 212.

[0098] For example, the thickness of the first connecting end 211 is greater than the thickness of the second connecting end 212, making the resistance of the first connecting end 211 less than the resistance of the second connecting end 212. This reduces the heat generated by the first connecting end 211 during testing, thereby reducing the overall heat generated by the connector 21 during testing and improving the reliability of the testing process. Optionally, the first connecting end 211 includes two parts. The first part, the first connecting end 211, and the second connecting end 212 are an integral structure, and the second part, the first connecting end 211, is connected to the first part, the first connecting end 211, by welding, bolting, snap-fitting, or other methods. Optionally, the first connecting end and the second connecting end 212 can be an integral structure.

[0099] For example, the thickness of the first connecting end 211 and the thickness of the second connecting end 212 are equal, so that the first connecting end 211 and the second connecting end 212 can be integrally formed, thereby reducing the manufacturing difficulty of the connector 21 and improving the manufacturing efficiency.

[0100] Figure 6 This is a schematic diagram of the structure of a connector in another testing device provided in this application embodiment.

[0101] In some alternative embodiments, please refer to Figure 6 The connector 21 includes a main body 214 and a conductive layer 215 covering the main body. The conductivity of the conductive layer is greater than that of the main body 214 to improve the overall conductivity of the connector 21.

[0102] Electrical conductivity is a physical quantity used to measure a material's ability to conduct electric current, usually expressed in Siemens units per meter (S / m).

[0103] Electrical conductivity can be obtained by testing according to GB / T 22638.1-2008.

[0104] Optionally, the main body 214 and the conductive layer 215 may be made of different materials to change the conductivity of the main body 214 and the conductive layer 215.

[0105] In some alternative embodiments, the material of the main body 214 includes aluminum, and the material of the conductive layer 215 includes silver, which improves the overall conductivity of the connector 21 while reducing the overall manufacturing cost of the connector 21.

[0106] Secondly, embodiments of this application provide a testing system, including the testing device 100 in any of the foregoing embodiments.

[0107] Please refer to the following: Figure 1 , Figure 2 as well as Figure 6This application provides a testing device 100, which includes a charging and discharging device 10 and a connecting component 20. The connecting component includes a connector 21 and a heat dissipation structure 22. The charging and discharging device 10 is electrically connected to the connector 21, and the connector is used to be electrically connected to a battery cell 200. The heat dissipation structure 22 is disposed on the connector 21.

[0108] The connector includes a first connecting end 211, a second connecting end 212, and a bent section 213. The first connecting end 211 and the second connecting end 212 are connected by the bent section 213, which is bent relative to both the first connecting end 211 and the second connecting end 212. A heat dissipation structure 22 is provided at least at the first connecting end 211. The heat dissipation structure 22 includes a heat sink 221 and a fan 222. The heat sink is provided on at least one side of the first connecting end 211 along the thickness direction Z of the connector 21. The air outlet of the fan 222 faces the heat sink 221. The material of the main body 214 is aluminum, and the material of the conductive layer 215 is silver.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A testing device, characterized in that, include: Charging and discharging device; A connection assembly includes a connector and a heat dissipation structure. The charging and discharging device is electrically connected to the connector, and the connector is used for electrical connection with a battery cell. The heat dissipation structure is disposed on the connector.

2. The testing apparatus according to claim 1, characterized in that, The connector includes a first connection end and a second connection end connected to each other. The first connection end is electrically connected to the charging and discharging device, and the second connection end is used to electrically connect to a battery cell. The heat dissipation structure is at least provided at the first connection end.

3. The testing apparatus according to claim 2, characterized in that, The heat dissipation structure includes a heat dissipation plate, which is disposed on at least one side of the first connecting end along the thickness direction of the connecting member.

4. The testing apparatus according to claim 3, characterized in that, The thermal conductivity of the heat sink is greater than that of the connector.

5. The testing apparatus according to claim 3, characterized in that, The heat dissipation structure includes a fan, and the air outlet of the fan is positioned facing the heat sink.

6. The testing apparatus according to claim 2, characterized in that, The heat dissipation structure includes a fan, and the air outlet of the fan is positioned facing the first connection end.

7. The testing apparatus according to claim 2, characterized in that, The dimension of the first connecting end along the width direction is greater than the dimension of the second connecting end along the width direction.

8. The testing apparatus according to claim 1, characterized in that, The connector includes a first connecting end, a second connecting end, and a bent section. The first connecting end and the second connecting end are connected through the bent section, which is bent relative to at least one of the first connecting end and the second connecting end.

9. The testing apparatus according to claim 8, characterized in that, The bent section is equipped with a fusible section.

10. The testing apparatus according to claim 8, characterized in that, The bent section is bent relative to both the first connecting end and the second connecting end; The dimension of the first connecting end along its own extension direction is greater than the dimension of the second connecting end along its own extension direction.

11. The testing apparatus according to claim 8, characterized in that, The thickness of the first connecting end is greater than or equal to the thickness of the second connecting end.

12. The testing apparatus according to claim 1, characterized in that, The connector includes a body and a conductive layer covering the body, wherein the conductivity of the conductive layer is greater than that of the body.

13. The testing apparatus according to claim 12, characterized in that, The material of the main body includes aluminum, and the material of the conductive layer includes silver.

14. A testing system, characterized in that, Includes the test apparatus as described in any one of claims 1 to 13.

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