Battery extrusion testing device and battery extrusion testing system

Abstract

This application relates to the field of battery testing equipment technology, specifically to a battery compression testing device and a battery compression testing system. The battery compression testing system includes a battery compression testing device and a voltage detection device. The battery compression testing device includes a base and a movable electrode connector. The base has a support surface for supporting the battery under test. The electrode connector has a connection structure for electrical connection with the voltage detection device. When the electrode connector is in the initial position, one end of the electrode connector is higher than the support surface, allowing the battery under test to make conductive contact with the electrode connector. The electrode connector can be pressed by the pressure head that compresses the battery under test. An elastic reset member is used to apply a spring force to the electrode connector to reset it to the initial position. During testing, the battery is placed on the support surface, and the battery electrodes make conductive contact with the corresponding electrode connectors. When the battery is pressed down, the electrode connectors can also be pressed, ensuring that the electrode connectors are always in conductive contact with the battery under test, thus achieving high-efficiency compression testing of the battery.

Description

Technical Field

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

[0002] Detecting voltage changes during battery deformation by compression is a core aspect of assessing battery safety. One feasible approach is to connect the positive and negative terminals of the battery under test to a voltage detection device using alligator clips, and then use a compression device to deform the battery, thereby detecting the voltage while the battery is being deformed.

[0003] This method requires ensuring that the alligator clips do not cause the battery to tilt. Therefore, when using alligator clips to hold the positive and negative terminals of the battery, the position of the alligator clips needs to be adjusted to ensure that the battery is placed horizontally against the platform, a process that is relatively time-consuming. Furthermore, for some batteries with unusual positive and negative terminal shapes, the alligator clips cannot properly hold the terminals, making it easy for them to detach during compression testing. Once detached, the alligator clips need to be reattached to the electrodes, affecting testing efficiency. Utility Model Content

[0004] This application provides a battery compression testing device to solve the technical problem of low efficiency in the prior art when performing compression testing on batteries; this application also provides a battery compression testing system using the above-mentioned battery compression testing device.

[0005] In a first aspect, one embodiment of this application provides a battery compression testing device, comprising:

[0006] A base having a support surface for supporting the battery under test when the battery under test is compressed in a first direction;

[0007] An electrode connector is movably mounted on the base along the first direction so that the electrode connector can move relative to the base when the pressure head that is pressing the battery under test presses the electrode connector. The electrode connector has a connection structure for electrical connection with a voltage detection device.

[0008] The electrode connector has an initial position during its travel, in which one end of the electrode connector protrudes from the support surface in the first direction, so that the battery under test can make conductive contact with the electrode connector.

[0009] And an elastic reset member, the elastic reset member being used to apply an elastic force to the electrode connector to reset the electrode connector to the initial position, so that the electrode connector can be reset to the initial position after being squeezed away from the initial position.

[0010] In one embodiment, the electrode connector includes a first connector and a second connector. The first connector is used to make conductive contact with the positive electrode of the battery under test, and the second connector is used to make conductive contact with the negative electrode of the battery under test. The first connector and the second connector are arranged at a distance from each other, and the support surface is arranged between the first connector and the second connector.

[0011] In one embodiment, the base includes a base body and a boss protruding upward relative to the base body, the first connector and the second connector are disposed on the base body, the boss is located between the first connector and the second connector, and the upper end face of the boss constitutes the support surface.

[0012] In one embodiment, the electrode connector is movably mounted on the base.

[0013] In one embodiment, the electrode connector is a conductive block.

[0014] In one embodiment, the conductive block includes a main body portion and a rib disposed on the main body portion. The main body portion has a conductive contact surface for conductive contact with the electrode of the battery under test. The rib extends along the first direction. The base is provided with a mounting hole and a guide groove communicating with the mounting hole. The main body portion is inserted into the mounting hole. The rib cooperates with the guide groove. The guide groove guides the electrode connector to move linearly along the first direction.

[0015] In one embodiment, there are at least two ribs, and each rib is arranged at intervals in the circumferential direction of the main body portion.

[0016] In one embodiment, the elastic reset member is press-fitted between the rib and the base.

[0017] In one embodiment, the connecting structure is located at one end of the main body portion that is inserted into the mounting hole, the mounting hole extending through the base along the first direction.

[0018] Secondly, one embodiment of this application provides a battery compression testing system, comprising:

[0019] A battery compression testing device is used to install the battery to be tested, and the battery compression testing device is as described in any of the above embodiments.

[0020] A voltage detection device is electrically connected to the electrode connector of the battery compression test device and is used to detect the voltage of the battery under test.

[0021] According to the battery compression testing system in the above embodiments, in use, the battery compression testing device can be installed on the compression equipment, so that the supporting surface of the base is opposite to the pressure head of the compression equipment. The battery to be tested is placed on the supporting surface of the base. After placement, the electrodes of the battery to be tested are electrically connected to the electrode connectors. The placement of the battery to be tested in the test position is convenient, and then the compression test can be performed. While the pressure head is compressing the battery to be tested, the electrode connectors can be squeezed and moved by the pressure head, ensuring that the electrode connectors are in conductive contact with the electrodes of the battery to be tested. The voltage detection device, which is electrically connected to the electrode connectors, can synchronously detect the voltage of the battery to be tested, thereby realizing a high-efficiency compression test of the battery. Attached Figure Description

[0022] Figure 1 A schematic diagram illustrating the interaction between the battery crushing test system and the battery under test, as provided in some embodiments of this application;

[0023] Figure 2 This is an exploded schematic diagram of a battery crush testing system provided in some embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the structure of the electrode connector of the battery crushing test system provided in some embodiments of this application;

[0025] Figure 4 A schematic diagram of the structure of the battery crushing test system provided in some embodiments of this application, showing the cooperation between the base and the elastic reset member;

[0026] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0027] List of feature names corresponding to the labels in the figure:

[0028] 1. Battery crush testing system; 11. Battery crush testing device; 111. Base; 1111. Support surface; 1112. Matrix; 1113. Boss; 112. Electrode connector; 1121. Main body; 1122. Rib; 113. Elastic reset component; 1114. Mounting hole; 1115. Guide groove; 12. Voltage detection device; 13. Wire;

[0029] 2. The battery being tested. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0031] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0033] This application provides a battery crush testing system 1, please refer to... Figure 1 The battery compression testing system 1 is used to perform compression tests on the battery 2 under test. The compression test includes applying pressure to the battery 2 to deform it while simultaneously detecting its voltage. Therefore, in actual use, the battery compression testing system 1 is used in conjunction with a compression device, which has a pressure head that applies pressure to the battery 2 to deform it. The compression device can use an existing press, and its structure and operation are existing technology, which will not be described in detail here.

[0034] For the structure of battery crush test system 1, please refer to [reference needed]. Figure 1 and Figure 2 The battery compression testing system 1 includes a battery compression testing device 11 and a voltage detection device 12. The battery compression testing device 11 is mounted on the worktable of the compression equipment and is capable of supporting the battery 2 under test. The voltage detection device 12 is used to detect the voltage of the battery 2 under test. The voltage detection device 12 can be any prior art device suitable for detecting the voltage of the battery 2 under test.

[0035] The battery compression testing device 11 includes a base 111, an electrode connector 112, and an elastic reset member 113. In use, the battery compression testing device 11 is mounted on the worktable of the compression equipment via the base 111, which has a support surface 1111 for supporting the battery 2 under test. In some embodiments, the battery compression testing device 11 is used in conjunction with a compression device in which the pressure head moves up and down; in this case, the support surface 1111 is the upward-facing surface. Of course, in other embodiments, the battery compression testing device 11 can also be used in conjunction with a compression device in which the pressure head moves horizontally; in this case, the support surface 1111 is the horizontal-facing surface.

[0036] Electrode connector 112 is in conductive contact with the electrodes of the battery under test 2. The direction of the pressure applied to the battery under test 2 during testing is defined as the first direction. Since the pressure head of the extrusion equipment is generally large, it covers not only the battery under test 2 but also the area where electrode connector 112 is located. Therefore, electrode connector 112 is movably mounted on base 111 along the first direction so that when the pressure head of the extrusion equipment extrudes the battery under test 2, electrode connector 112 can also be pressed by the pressure head, ensuring that electrode connector 112 and battery under test 2 are always in conductive contact.

[0037] The electrode connector 112 also has a connection structure for electrical connection with the voltage detection device 12. As described above, the electrode connector 112 is movably mounted on the base 111. The position of the electrode connector 112 when it is not pressed down is the initial position. When the electrode connector 112 is in the initial position, its end protrudes from the support surface 1111, so that after the battery under test 2 is placed on the support surface 1111, the electrode of the battery under test 2 can make conductive contact with the corresponding electrode connector 112.

[0038] An elastic reset member 113 is disposed between the electrode connector 112 and the base 111, and is used to drive the electrode connector 112 to reset to its initial position after the pressure applied to the electrode connector 112 by the pressure head of the extrusion device is removed. Regarding the number of electrode connectors 112, at least two electrode connectors 112 are provided on the base 111 to enable extrusion testing of at least one battery under test 2 at a time. The two electrode connectors 112 are in conductive contact with the positive and negative electrodes of the battery under test 2, respectively. Of course, in some other embodiments, two or more pairs of electrode connectors 112 can be provided on the base 111, with one pair of electrode connectors 112 cooperating with one battery under test 2, thus enabling extrusion testing of multiple batteries under test 2 at a time.

[0039] Since the battery under test 2 can be electrically connected to the corresponding electrode connector 112 once it is placed on the support surface 1111, when performing the compression test on the battery under test 2, it is only necessary to place the battery under test 2 on the support surface 1111. The operation is convenient and can improve the efficiency of the compression test on the battery under test 2.

[0040] In some embodiments, please refer to Figure 1 The two electrodes of the battery under test 2 are located at both ends of the battery under test 2. The corresponding two electrode connectors 112 are the first connector and the second connector, respectively. The first connector is used for conductive contact with the positive electrode of the battery under test 2, and the second connector is used for conductive contact with the negative electrode of the battery under test 2. The first connector and the second connector are arranged at intervals and aligned. The support surface 1111 is located between the first connector and the second connector. In this way, after the battery under test 2 is placed on the support surface 1111, the electrodes at both ends of its battery are in contact with the first connector and the second connector, respectively, and conduct electricity. In some embodiments, please refer to Figure 2 The base 111 includes a base 1112 and a boss 1113 protruding upward relative to the base 1112. A first connector and a second connector are disposed on the base 1112, and the boss 1113 is located between the first connector and the second connector. The upper end surface of the boss 1113 forms a support surface 1111. The boss 1113 is provided so that the support surface 1111 is in a higher position, which facilitates the observation of the deformation of the battery 2 under test during the test.

[0041] To ensure reliable conductive contact between the electrode connector 112 and the battery under test 2, the distance between the first connector and the second connector can be less than the length of the battery under test 2. This allows the battery under test 2 to be placed on the support surface 1111, with its electrodes at both ends interlocking with the two electrode connectors 112 of the battery compression testing device 11. After the battery under test 2 is properly positioned on the support surface 1111, the first and second connectors are tightly fitted with the two electrodes of the battery under test 2. During the compression deformation process, the deformation of the battery under test 2 will cause its length to increase; therefore, reliable conductive contact between the first and second connectors and the battery under test 2 can still be ensured during the compression deformation process. Alternatively, reliable conductive contact between the electrode connector 112 and the battery under test 2 can be ensured through structural design, such as by providing a metal spring on the electrode connector 112 for elastic contact with the electrodes of the battery under test 2. The position of the metal spring can be set so that after the pressure head completes the compression of the battery under test 2, the metal spring is above the support surface 1111 to avoid interference between the metal spring and the support surface 1111.

[0042] In some other embodiments, the two electrodes of the battery under test 2 may also be located on the same side. Correspondingly, the first connector and the second connector of the battery compression test device 11 are arranged side by side, and a stop block is provided on the base 111 at intervals from the first connector and the second connector. The support surface 1111 is provided between the stop block and the first connector and the second connector. When the battery under test 2 is placed on the battery compression test device 11, the side of the battery under test 2 with the two electrodes faces the first connector and the second connector, and the two electrodes cooperate with the first connector and the second connector respectively. The side of the battery under test 2 facing away from the electrode cooperates with the stop block.

[0043] The distance between the first and second connectors and the stop block can be less than the length of the battery under test 2, so that the battery under test 2 is interference-fitted with the first and second connectors and the stop block, ensuring reliable contact between the two electrodes of the battery under test 2 and the first and second connectors. Alternatively, an elastic pushing mechanism can be provided on the side of the stop block facing the first and second connectors. After the battery under test 2 is placed on the battery compression testing device 11, the elastic pushing mechanism will elastically push the battery under test 2 toward the first and second connectors, ensuring that the electrodes of the battery under test 2 can reliably contact the first and second connectors.

[0044] Given that electrode connector 112 needs to withstand the pressure of the pressure head, in some embodiments, please refer to Figure 2 and Figure 3 The electrode connector 112 is configured as a conductive block, which is a block structure, thus giving the electrode connector 112 reliable structural strength. In some embodiments, please refer to... Figure 3 The conductive block includes a main body portion 1121 and a rib 1122 disposed on the main body portion 1121. The main body portion 1121 has a conductive contact surface for conductive contact with the electrode of the battery under test 2, and the rib 1122 extends along a first direction.

[0045] Please refer to Figure 4 and Figure 5 To install the conductive block-type electrode connector 112, the base 111 is provided with a mounting hole 1114 and a guide groove 1115 communicating with the mounting hole 1114. The main body portion 1121 of the conductive block is inserted into the mounting hole 1114, and the protruding rib 1122 cooperates with the guide groove 1115, guiding the electrode connector 112 to move linearly in a first direction through the guide groove 1115. To make the movement of the conductive block smoother and prevent the conductive block from jamming, in some embodiments, there are at least two protruding ribs 1122, and each protruding rib 1122 is arranged at intervals in the circumferential direction of the main body portion 1121. Through the distributed multiple guide structures, the movement of the conductive block is ensured to be more stable and smooth. In some embodiments, the main body portion 1121 is cuboid in shape, and there are two protruding ribs 1122, which are arranged on opposite sides of the cuboid main body portion 1121.

[0046] In some other embodiments, the electrode connector 112 may not be a conductive block structure, but a conductive rod that is movably inserted into the base 111. Of course, the electrode connector 112 may also include an insulating base and a conductive sheet disposed on the insulating base. The electrode connector 112 is movably disposed on the base 111 through the insulating base and makes conductive contact with the battery 2 under test through the conductive sheet.

[0047] In some embodiments, please refer to Figure 4 and Figure 5Regarding the arrangement of the elastic reset member 113, based on the arrangement of the protruding rib 1122 on the electrode connector 112 and the arrangement of the guide groove 1115 on the base 111, the elastic reset member 113 is disposed at the bottom of the guide groove 1115. After the electrode connector 112 is assembled on the base 111, the elastic reset member 113 is press-fitted between the protruding rib 1122 and the bottom of the guide groove 1115, that is, the elastic reset member 113 is press-fitted between the protruding rib 1122 and the base 111. In some embodiments, the elastic reset member 113 is a compression spring, and a positioning pin is provided at the bottom of the guide groove 1115, with the compression spring fitted onto the positioning pin. In other embodiments, the elastic reset member 113 can also be a rubber block, a tension spring, etc.

[0048] The electrode connector 112 is electrically connected to the voltage detection device 12 via a wire 13. For ease of wiring, please refer to [reference needed] in some embodiments. Figure 4 and Figure 5 The mounting hole 1114 penetrates the base 111 along a first direction. The connection structure for connecting the electrode connector 112 to the wire 13 is provided on the end face of the main body 1121 at the end that inserts into the mounting hole 1114, thus allowing the wire 13 to reach the location of the connection structure through the mounting hole 1114. The connection structure can be a screw screwed onto the electrode connector 112. By tightening the screw, the wire 13 can be pressed onto the electrode connector 112, achieving a conductive connection between the wire 13 and the electrode connector 112. Regarding the arrangement of the wire 13, in some other embodiments, to prevent the lower end face of the base 111 from pressing the wire 13, a wiring groove can be provided on the lower end face of the base 111. The wiring groove communicates with the mounting hole 1114, allowing the wire 13 to be arranged in the wiring groove and led out to the side of the base 111 to connect with the voltage detection device 12. Of course, a through hole can be provided on the worktable of the extrusion equipment, with the through hole aligned with the mounting hole 1114, so that the wire 13 can be led out through the through hole to the lower side of the extrusion equipment and connected to the voltage detection device 12.

[0049] In some other embodiments, the mounting hole 1114 may also be a blind hole, with a connecting hole provided between the inner wall of the mounting hole 1114 and the side of the base 111 for arranging the wire 13.

[0050] In some embodiments, the steps of the battery compression test system 1 to perform compression testing on the battery 2 under test are as follows:

[0051] The battery compression test system 1 is paired with a suitable compression device, and the battery under test 2 is placed on the battery compression test device 11. Since the electrode connector 112 is in contact with the electrode of the battery under test 2 and conducts electricity, no other operation is required. The installation of the battery under test 2 at the target position and the electrical connection with the voltage detection device 12 are very convenient. During the compression test, the electrode connector 112 is pressed down together with the battery under test 2. During the compression of the battery under test 2, the electrode connector 112 always makes reliable conductive contact with the battery under test 2. The entire compression test process does not require any other operation, and the compression test of the battery under test 2 is performed with high efficiency.

[0052] This application also provides a battery compression testing device, which has the same structure and usage as the battery compression testing device 11 of the battery compression testing system 1 in the above embodiments, and will not be described again here.

[0053] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A battery compression testing device, characterized in that, include: A base having a support surface for supporting the battery under test when the battery under test is compressed in a first direction; An electrode connector is movably mounted on the base along the first direction so that the electrode connector can move relative to the base when the pressure head that is pressing the battery under test presses the electrode connector. The electrode connector has a connection structure for electrical connection with a voltage detection device. The electrode connector has an initial position during its travel, in which one end of the electrode connector protrudes from the support surface in the first direction, so that the battery under test can make conductive contact with the electrode connector. And an elastic reset member, the elastic reset member being used to apply a spring force to the electrode connector to reset the electrode connector to the initial position, so that the electrode connector can be reset to the initial position after being squeezed away from the initial position.

2. The battery compression testing device as described in claim 1, characterized in that, The electrode connector includes a first connector and a second connector. The first connector is used to make conductive contact with the positive electrode of the battery under test, and the second connector is used to make conductive contact with the negative electrode of the battery under test. The first connector and the second connector are arranged at intervals, and the support surface is arranged between the first connector and the second connector.

3. The battery compression testing device as described in claim 2, characterized in that, The base includes a base body and a boss protruding upward relative to the base body. The first connector and the second connector are disposed on the base body, and the boss is located between the first connector and the second connector. The upper end face of the boss constitutes the support surface.

4. The battery crush testing apparatus as described in any one of claims 1-3, characterized in that, The electrode connector is mounted on the base in a way that allows it to move up and down.

5. The battery crush testing apparatus as described in any one of claims 1-3, characterized in that, The electrode connector is a conductive block.

6. The battery compression testing apparatus as described in claim 5, characterized in that, The conductive block includes a main body and a rib provided on the main body. The main body has a conductive contact surface for making conductive contact with the electrode of the battery under test. The rib extends along the first direction. The base is provided with a mounting hole and a guide groove communicating with the mounting hole. The main body is inserted into the mounting hole. The rib cooperates with the guide groove. The guide groove guides the electrode connector to move linearly along the first direction.

7. The battery compression testing apparatus as described in claim 6, characterized in that, There are at least two ribs, and each rib is arranged at intervals in the circumferential direction of the main body.

8. The battery compression testing apparatus as described in claim 6, characterized in that, The elastic reset member is press-fitted between the rib and the base.

9. The battery compression testing apparatus as described in claim 6, characterized in that, The connecting structure is located at one end of the main body that is inserted into the mounting hole, and the mounting hole extends through the base along the first direction.

10. A battery crushing test system, characterized in that, include: A battery compression testing device for mounting the battery to be tested, wherein the battery compression testing device is the battery compression testing device as described in any one of claims 1-9; A voltage detection device is electrically connected to the electrode connector of the battery compression test device and is used to detect the voltage of the battery under test.

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