A detection head for testing an electric core and an electric core testing device

Abstract

The utility model discloses a detection head and electric core testing device for electric core test, including base, the platform on base, the vertical board of arrangement in platform both sides, be equipped with detection head on two vertical boards, detection head includes electrically conductive contact and mounting piece, electrically conductive contact is composed of two can opposite folding or opposite away from the clamping block, and the clamping space is formed between two clamping blocks, and when electrically conductive contact's outer contour and the pole column in the hard package electric core of detection are matched when two clamping blocks are in the folding state, mounting piece includes fixed bolster and telescopic mechanism respectively with two clamping blocks links, or, mounting piece includes two telescopic mechanisms, and two telescopic mechanisms are linked with respective corresponding clamping block. The utility model provides a detection head and electric core testing device for electric core test, and it can be adapted to soft package electric core and hard package electric core simultaneously, improves the equipment versatility, reduces the number of test equipment, and then reduces the test cost.

Description

Technical Field

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

[0002] With the vigorous development of sustainable energy, the new energy battery industry is also showing a booming development prospect. Among them, battery technologies such as 3C batteries and power batteries have made rapid breakthroughs, which have also placed higher demands on cell performance and safety. Due to the inherent physical and chemical properties of battery cells, batteries themselves have inherent instability and safety issues. Furthermore, as cell performance continues to improve, overcoming battery instability and improving safety will inevitably become an important direction for future battery development. Therefore, the requirements for existing cell testing equipment are also increasing, and the development of cell technology will drive the continuous development of cell testing equipment.

[0003] Currently, battery cells on the market are mainly divided into two types based on packaging: pouch cells and rigid cells. Rigid cells are primarily cylindrical and prismatic. The positive and negative electrode positions and testing methods differ for each cell type, resulting in different testing fixtures for each type. Although each type of cell has a corresponding fixture, different types of cells are incompatible. Testing each type of cell requires purchasing new test cabinets or fixtures, which will bring additional costs to research and development and manufacturing, hindering the development of enterprises and the industry. Utility Model Content

[0004] The present invention aims to at least partially solve one of the technical problems in the related art: to provide a detection head and a cell testing device for cell testing, which can be adapted to both soft-pack and hard-pack cells, improve the versatility of the equipment, reduce the number of testing devices, and thus reduce the testing cost.

[0005] Therefore, one objective of this utility model is to provide a testing head for battery cell testing, which includes a conductive contact and a mounting component for connecting the conductive contact. The conductive contact is composed of two clamping blocks that can be closed relative to each other or moved away from each other. A clamping space for clamping the upper tab of the soft-pack battery cell is formed between the two clamping blocks. When the two clamping blocks in the conductive contact are in the closed state, the outer contour of the conductive contact matches the pole of the hard-pack battery cell to be tested. The mounting component includes a fixed bracket and a telescopic mechanism respectively connected to the two clamping blocks. The telescopic mechanism is configured to drive the corresponding clamping block to move relative to or away from the other clamping block. Alternatively, the mounting component includes two telescopic mechanisms, each connected to its corresponding clamping block, for driving the two clamping blocks to move relative to or away from each other. Compared to existing battery cell testing fixtures that can only adapt to one type of battery cell, this testing head is compatible with the testing of pouch cells and at least one rigid battery cell. When the two clamping blocks in the conductive contact are closed, their structure is consistent with the conventional testing head structure for the corresponding rigid battery cell. When the two clamping blocks are separated and the tab on the pouch cell is placed in the clamping space between the two clamping blocks, the clamping force of the two clamping blocks can be used to clamp and conduct electricity to the tab, ultimately completing the testing of the pouch cell.

[0006] According to one example of this utility model, the telescopic mechanism is a telescopic cylinder, in which a piston rod is fixedly connected to the back of the corresponding clamping block, for driving the corresponding clamping block to move toward or away from another clamping block. By driving at least one clamping block to perform a translational movement through the telescopic cylinder, the relative closing or moving away movement of the two clamping blocks is completed.

[0007] According to one example of this invention, the clamping block has a semi-circular cross-section, so that when the two clamping blocks of the conductive contact are closed relative to each other, the outer contour of the cross-section of the conductive contact is circular. The two semi-circular clamping blocks can form a conductive contact with a circular cross-section after being closed. This conductive contact is consistent with the conventional cylindrical detection head structure used in existing cylindrical cells, and therefore can be well applied to the testing of cylindrical cells.

[0008] According to one example of this utility model, a small hole formed by two clamping blocks is provided at the center of the cross-section of the conductive contact. This small hole serves two purposes: firstly, a temperature-sensitive metal can be installed inside the hole to accommodate the temperature-sensing wire; secondly, the small hole can also serve as a positioning hole, allowing positioning light to pass through and display the relative position between the conductive contact and the battery cell under test, facilitating precise adjustment.

[0009] According to one example of this invention, the mating surfaces of the two clamping blocks each have a plurality of toothed protrusions. The toothed protrusions can better clamp the tabs of the pouch cell.

[0010] According to one example of this utility model, the middle position of the bonding surface is recessed to form a shallow groove, and the toothed protrusions are evenly distributed in the shallow groove. The top of the toothed protrusions is flush with or lower than the horizontal plane of the bonding surface. A removable conductive adhesive is attached to the toothed protrusions. The toothed protrusions arranged in the shallow groove can prevent damage to the electrode tabs during clamping. The contact area and clamping force between the toothed protrusions and the electrode tabs can be increased by adding additional conductive adhesive. Furthermore, during testing of the hard-pack battery cell, only the conductive adhesive needs to be removed to allow the bonding surfaces of the two clamping blocks to close properly.

[0011] According to one example of the present invention, the tips of the tooth-shaped protrusions are all smooth arc surfaces.

[0012] Another objective of this invention is to provide a battery cell testing device, comprising a base, a platform on the base for placing the battery cell to be tested, and upright plates arranged on both sides of the platform. At least one of the upright plates is slidably engaged with the base, allowing the two upright plates to move relative to or away from each other. The base is provided with a translation mechanism for driving the upright plates to move relative to the base. The two upright plates are respectively provided with the aforementioned testing heads at positions corresponding to the battery cell to be tested, and the mounting components in the testing heads are connected to the corresponding upright plates. The relative or away movement of the two upright plates enables the testing heads on the two upright plates to move relative to or away from each other, allowing the two testing heads to simultaneously abut against the terminals at both ends of the battery cell on the platform, thus completing the test.

[0013] According to an example of the present invention, the translation mechanism includes a lead screw that is rotatably coupled to the base and arranged horizontally along the length of the base, and a lead screw nut that is threadedly driven by the lead screw. A hand crank is provided at one end of the lead screw that is exposed outside the base. The two upright plates include a fixed upright plate and a movable upright plate. The fixed upright plate is fixed to the base, and the bottom of the movable upright plate is fixed to the lead screw nut.

[0014] According to one example of this utility model, a laser positioner is provided on the upright plate, and the position of the laser positioner corresponds to the position of the detection head on the upright plate, so that the light emitted by the laser positioner can pass through the clamping space of the detection head and illuminate the side of the detection head away from the laser positioner. The laser positioner can be used to ensure that the detection heads on the two upright plates are in symmetrical positions during the debugging phase, and at the same time, when the battery cell to be tested is placed on the platform, it is also possible to visually determine whether the positions of the terminals at both ends of the battery cell and the detection head are aligned.

[0015] The above technical solution has the following advantages or beneficial effects: First, when the two clamping blocks of the conductive contact are closed, they conform to the outer contour of the same type of hard-pack battery cell detection head. Therefore, it can directly replace the existing hard-pack battery cell detection head of the same type for testing hard-pack battery cells. When the two clamping blocks are separated, they can clamp the tabs of the soft-pack battery cell when they are closed, thus achieving the same clamping effect as the existing test fixtures used for soft-pack battery cells, thereby completing the testing of soft-pack battery cells. Therefore, the conductive contact is compatible with testing soft-pack battery cells and at least one type of hard-pack battery cell, and has strong versatility. Second, a small hole is provided at the center of the conductive contact. On the one hand, a temperature-sensing metal can be installed in the small hole to insert the temperature-sensing wire. On the other hand, the small hole can also be used as a positioning hole for positioning. Light passing through the small hole displays the relative position between the conductive contacts and the battery cell under test, aiding in positioning and facilitating precise adjustment. Simultaneously, shallow recessed grooves with toothed protrusions are provided on the mating surfaces of the two clamping blocks. When clamping the tabs of a soft-pack battery cell, conductive adhesive or a conductive sticker can be attached to the groove, allowing for a tight fit and improved clamping and conductivity. For testing hard-pack battery cells, simply removing the conductive sticker allows the two clamping blocks to close. Finally, laser positioners on the two upright plates are used to visually inspect the alignment of the testing heads on both plates and the alignment of the terminals on the battery cell placed on the platform with their corresponding testing heads using the detection light emitted by the laser potentiometer.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is an isometric view of the detection head used for cell testing according to this utility model.

[0018] Figure 2 This is a left-side view of the detection head used for testing battery cells according to this utility model.

[0019] Figure 3 for Figure 2 A magnified view of a portion of region "A".

[0020] Figure 4 This is a front view schematic diagram of the detection head used for cell testing according to this utility model.

[0021] Figure 5 This is an isometric view of the battery cell testing device of this utility model.

[0022] Figure 6 This is a front view schematic diagram of the battery cell testing device of this utility model.

[0023] Figure 7 This is a bottom view schematic diagram of the battery cell testing device of this utility model.

[0024] Figure 8 for Figure 7 A cross-sectional view along the "BB" direction.

[0025] Figure 9 for Figure 8 A cross-sectional view along the "CC" direction.

[0026] Figure 10 for Figure 8 A magnified view of a portion of the "D" region.

[0027] Among them, 1. conductive contact; 1.1 clamping block; 1.2 clamping space; 1.3 small hole; 1.4 mating surface; 1.5 shallow groove; 1.6 toothed protrusion; 2. hard-pack battery cell; 2.1 pole post; 3. fixed bracket; 4. telescopic cylinder; 4.1 piston rod; 5. base; 6. platform; 7. fixed upright plate; 8. movable upright plate; 9. translation mechanism; 9.1 lead screw; 9.2 lead screw nut; 9.3 hand crank; 10. laser positioner; 11. through hole. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] The following describes in detail, with reference to the accompanying drawings, a detection head and a cell testing device for cell testing according to embodiments of the present invention.

[0030] The term "terminal" as used below should be broadly understood as: the electrical contact component at the positive and negative terminals of a hard-pack battery cell that serves to conduct electricity. The term "tab" as used below should be broadly understood as: the electrical contact component that serves to conduct electricity at the positive and negative terminals of a pouch cell.

[0031] Example 1 This utility model provides a testing head for battery cell testing, such as... Figures 1-4As shown, it includes a conductive contact 1 and a mounting component for connecting the conductive contact 1. The mounting component is used to connect to an external support component, so that the conductive contact 1 can be installed in the three-dimensional space to achieve electrical connection with the positive and negative terminals of the battery cell, thereby completing the battery cell test. Specifically, the conductive contact 1 consists of two clamping blocks 1.1 that can move relative to each other or away from each other. The two clamping blocks 1.1 are arranged opposite each other, and the outer surfaces of the two clamping blocks 1.1 respectively have mating surfaces. A clamping space 1.2 is formed between the mating surfaces of the two clamping blocks 1.1 for clamping the upper tab of the soft-pack battery cell. When the two clamping blocks 1.1 in the conductive contact 1 are in the closed state, the outer contour of the conductive contact 1 matches the pole post 2.1 in the hard-pack battery cell 2 to be tested.

[0032] One preferred example of the mounting component is that the mounting component includes a fixed bracket 3 connected to two clamping blocks 1.1 respectively and a telescopic mechanism, the telescopic mechanism being configured to drive the corresponding clamping block 1.1 to move relative to or away from the other clamping block 1.1.

[0033] Preferably, the telescopic mechanism is a telescopic cylinder 4. The cylinder body of the telescopic cylinder 4 is connected to an external bearing component. The piston rod 4.1 in the telescopic cylinder 4 is fixedly connected to the back of the corresponding clamping block 1.1, and is used to drive the corresponding clamping block 1.1 to move toward or away from another clamping block 1.1.

[0034] A second preferred example based on the mounting component: the mounting component includes two telescopic mechanisms, which are respectively arranged on opposite sides of the two clamping blocks 1.1, and each telescopic mechanism is connected to its corresponding clamping block 1.1 to drive the two clamping blocks 1.1 to move relative to or away from each other.

[0035] Preferably, both telescopic mechanisms are telescopic cylinders 4. The cylinder body of the telescopic cylinder 4 is connected to the external bearing component. The piston rod 4.1 in the telescopic cylinder 4 is fixedly connected to the back of the corresponding clamping block 1.1, which is used to drive the corresponding clamping block 1.1 to move toward or away from the other clamping block 1.1.

[0036] In this embodiment, the back side of clamping block 1.1 refers to the position where the current clamping block 1.1 is away from the corresponding other clamping block, that is, the position on the outer surface of the current clamping block 1.1 away from the mating surface 1.4.

[0037] Example 2 Based on the preferred embodiment 1 described above, the cross-section of the clamping block 1.1 is semi-circular and extends along its own axis to form a columnar structure. The radii of the arcs in the cross-sections of the two clamping blocks 1.1 are the same, and the straight edges of the cross-sections of the two clamping blocks 1.1 are opposite each other. This results in the outer contour of the conductive contact 1 formed by the two clamping blocks 1.1 being circular when they are closed together. In this embodiment, the shape of the outer contour of the conductive contact 1 after the two clamping blocks 1.1 are closed together is basically consistent with the existing detection head used for cylindrical battery cell testing. Therefore, it can directly replace the existing detection head for cylindrical battery cells to achieve the energization test of cylindrical battery cells.

[0038] It should be understood that when other types of rigid-pack battery cells need to be tested, it is only necessary to set the shape of the two clamps 1.1 after they are closed to be consistent with the outer contour of the existing test head for the corresponding type of rigid-pack battery cell, including but not limited to prismatic battery cells.

[0039] Example 3 In a preferred embodiment, the conductive contact 1 has a small hole 1.3 formed by two clamping blocks 1.1 at the center of its cross-section. The small hole 1.3 extends axially through both the front and rear end faces of the conductive contact 1, and a temperature-sensitive metal (not shown in the figure) is embedded in the small hole 1.3 to accommodate the temperature-sensing wire.

[0040] Example 4 like Figure 3 As shown, the mating surfaces 1.4 of the two clamping blocks 1.1 each have several toothed protrusions 1.6. The toothed protrusions 1.6 enable a more secure clamping of the soft-pack battery cell tabs during the clamping process between the mating surfaces 1.4 of the two clamping blocks 1.1.

[0041] Preferably, the tips of the teeth of the tooth-shaped protrusion 1.6 are all smooth arc surfaces. By designing the tips of the teeth of the tooth-shaped protrusion 1.6 as arc surfaces, the damage to the electrode tab is minimized during the clamping process of the tooth-shaped protrusion 1.6, reducing the occurrence of electrode tab puncture.

[0042] Furthermore, a shallow groove 1.5 is formed by the indentation at the middle position of the mating surface 1.4. The toothed protrusions 1.6 are evenly distributed within the shallow groove 1.5, and the tooth tips of the toothed protrusions 1.6 are either flush with the mating surface 1.4 or lower than the horizontal plane of the mating surface 1.4. A removable conductive adhesive (not shown in the figure) is attached to the toothed protrusions 1.6. In this embodiment, the toothed protrusions 1.6 are hidden within the groove space of the shallow groove 1.5. Therefore, when the mating surfaces 1.4 of the two clamping blocks 1.1 are mated together and in a closed state, the toothed protrusions 1.6 will not make hard contact with each other, allowing the two clamping blocks 1.1 to close smoothly and be used as a detection head for hard-packed battery cells. When clamping the tabs of a pouch cell, conductive pads can be pre-placed within the shallow grooves 1.5 of the two clamping blocks 1.1. These conductive pads cover the toothed protrusions 1.6, with a portion protruding outside the shallow grooves 1.5. During relative movement of the two clamping blocks 1.1, the two conductive pads first contact the tabs of the pouch cell to be tested, completing the clamping and conducting of electricity. In this process, excess conductive pads, after being compressed, extend into the shallow grooves 1.5 under the clamping force, filling the gaps between adjacent toothed protrusions 1.6, increasing the contact area and improving conductivity.

[0043] It should be understood that the conductive patch is an existing conventional flexible conductive product. It can be a sheet structure attached to the toothed protrusion 1.6, or it can be a liquid conductive material, such as conductive adhesive, which fills the shallow groove 1.5 and covers the outside of the toothed protrusion 1.6. After the conductive adhesive cures, it forms an elastic conductive patch. Using this conductive adhesive to form a conductive patch not only makes the process of adding the conductive patch simple, but also makes the process of removing the conductive patch afterward convenient. You only need to tear off a corner of the conductive patch to remove the entire conductive patch from the shallow groove.

[0044] Example 5 Based on the preferred methods for each detection head in the above embodiments, this embodiment provides a battery cell testing device, such as... Figures 5-10 As shown, the device includes a base 5, a platform 6, and two upright plates. The platform 6 is mounted on the base 5 and is used to hold the battery cell to be tested. The two upright plates are arranged on both sides of the platform 6 along the length of the base 5. At least one of the upright plates is a movable upright plate 8, which slides with the base 5 along the length direction so that the two upright plates can move relative to or away from each other. The base 5 is provided with a translation mechanism 9 for driving the movable upright plate 8 to move relative to the base 5. The two upright plates are respectively provided with the detection head of the above embodiment at the position corresponding to the battery cell to be tested. The mounting part of the detection head is connected to the corresponding upright plate.

[0045] Example 6 Based on the preferred embodiment described above, the translation mechanism 9 includes a lead screw 9.1 that is rotatably engaged with the base 5 and horizontally arranged along the length of the base 5, and a lead screw nut 9.2 that is sleeved on the lead screw 9.1 and threadedly driven by the lead screw 9.1. Both ends of the lead screw 9.1 are rotatably engaged with bearing holes on the base. The end of the lead screw 9.1 exposed outside the base 5 is the left end. A hand crank 9.3 is provided on the left end of the lead screw 9.1. In this embodiment, the two upright plates include a fixed upright plate 7 and a movable upright plate 8. The fixed upright plate 7 is fixed to the base 5, and the bottom of the movable upright plate 8 is fixed to the lead screw nut 9.2.

[0046] like Figure 6 and Figure 8 As shown, the fixed upright plate 7 is located on the left end of the base 5 and is fixedly connected to the base 5. The movable upright plate 8 is located on the right side of the fixed upright plate 7. The bottom of the movable upright plate 8 is fixed to the screw nut 9.2. Under the drive of the screw nut 9.2, the movable upright plate 8 can move to the left, reducing the distance between it and the fixed upright plate 7, or move to the right, increasing the distance between it and the fixed upright plate 7.

[0047] Example 7 Based on the preferred embodiments described above, such as Figure 8 and Figure 10 As shown, the fixed plate 7 is provided with a first laser locator 10, which corresponds to the position of the detection head on the fixed plate 7, so that the light emitted by the laser locator 10 can pass through the clamping space 1.2 on the detection head from the side of the detection head close to the laser locator 10 and illuminate the other side of the detection head away from the laser locator 10. That is, the light emitted by the first laser locator 10 can pass through the clamping space 1.2 of the detection head on the fixed plate 7 from left to right.

[0048] A second laser positioner 10 is provided on the movable upright plate 8. The position of the second laser positioner 10 corresponds to the position of the detection head on the movable upright plate 8, so that the light emitted by the second laser positioner 10 can pass through the clamping space 1.2 on the detection head from the side of the detection head close to the laser positioner 10 to the other side of the detection head away from the second laser positioner 10. That is, the light emitted by the second laser positioner 10 can pass through the clamping space 1.2 of the detection head on the movable upright plate 8 from right to left.

[0049] Preferably, the laser positioners 10 on the two uprights and their corresponding detection heads are located on the left and right sides of the uprights, respectively. The detection head on the fixed upright 7 is the first detection head, and the detection head on the movable upright 8 is the second detection head. Figure 8As shown, the first laser positioner 10 is located on the left side of the fixed plate 7, and the first detection head on the fixed plate 7 is located on the right side of the fixed plate 7. The fixed plate 7 has a through hole 11 flush with the clamping space 1.2 in the first detection head. The positioning light emitted by the first laser positioner 10 can pass through the through hole 11 and the clamping space 1.2 in the first detection head in sequence. Preferably, when the conductive contact 1 in the first detection head has a small hole 1.3, the through hole 11 on the fixed plate 7 is aligned with the small hole 1.3, that is, the axis of the through hole 11 is collinear with the axis of the small hole 1.3. The second laser positioner 10 is located on the right side of the movable plate 8, and the second detection head on the movable plate 8 is located on the left side of the movable plate 8. The movable plate 8 has a through hole 11 flush with the clamping space 1.2 in the second detection head. The positioning light emitted by the second laser positioner 10 can pass through the through hole 11 and the clamping space 1.2 in the second detection head in sequence. Preferably, when the conductive contact 1 in the second detection head has a small hole 1.3, the through hole 11 on the movable upright plate 8 is aligned with the small hole 1.3, that is, the axis of the through hole 11 is collinear with the axis of the small hole 1.3.

[0050] The laser positioner 10 in this embodiment is a commercially available product. Its function is simply to emit a parallel detection laser to form an illuminated indicator line on the laser's path, thereby facilitating the operator's visual inspection and adjustment of the position of each component. This is the basic function of the existing laser positioner 10. Therefore, the structure and working principle of the laser positioner 10 will not be described in detail in this embodiment. The laser positioner 10 in this embodiment should be broadly understood as any device that can assist personnel in adjusting the relative positions of the various components on the battery cell testing device of this embodiment through the emitted light.

[0051] Example 8 The debugging method of the cell testing device in Embodiment 7 above includes the following steps: S1. Install the fixed plate 7 onto the base 5, and then install the first detection head on the right side of the fixed plate 7, and keep the center line of the small hole 1.3 on the first detection head collinear with the center line of the through hole 11 on the fixed plate 7. S2. Install the first laser positioner 10 on the left side of the fixed plate 7, and make the detection light emitted by the first laser positioner 10 pass horizontally from left to right through the through hole 11 on the fixed plate 7 and the small hole 1.3 on the first detection head. S3. Install the movable upright plate 8 on the lead screw nut, and adjust the installation position of the movable upright plate 8 according to the projection position of the detection light emitted by the first laser positioner 10 on the movable upright plate 8, so that the detection light emitted by the first laser positioner 10 is collinear with the center line of the through hole 11 on the movable upright plate 8. S4. Install the second detection head on the left side of the movable upright plate 8, and make the center line of the small hole 1.3 on the second detection head collinear with the center line of the through hole 11 on the movable upright plate 8. S5. Remove the first laser positioner 10 and install the second laser positioner 10 on the right side of the movable upright plate 8. S6. Mount the stage 6 on the base 5 and position the stage 6 along the length direction close to the fixed plate 7, so that the left end of the battery cell to be tested placed on the stage 6 can be connected to the first detection head on the fixed plate 7. S7. Place a standard battery cell on the stage 6, and adjust the position of the stage 6 according to the projection position of the detection light emitted by the second laser positioner 10 on the standard battery cell until the detection light emitted by the second laser positioner 10 is aligned with the pole at the right end of the standard battery cell.

[0052] The first laser positioner 10 and the second laser positioner 10 mentioned above can be two laser positioners with the same structure, or the same laser positioner can be used sequentially on the fixed plate 7 and the movable plate 8.

[0053] The aforementioned standard cell refers to a cell with the same structure as the cell under test and whose structural dimensions conform to the standard for that type of cell.

[0054] In this embodiment, the first laser positioner 10 can calibrate the positions of the movable stand and the second detection head. The second laser positioner 10 can not only calibrate the position of the platform 6 so that the two ends of the battery cell to be tested placed on the platform 6 are well aligned with the detection head, but also, during the battery cell testing process, the detection light emitted by the second laser positioner 10 can be used to check in real time whether the second detection head is aligned with the battery cell's terminal post, ensuring a smooth testing process. The removal of the first laser positioner 10 in step S5 above can prevent the operator from accidentally touching the first laser positioner 10 and causing damage when operating the hand crank 9.3. Moreover, since the platform 6 is located close to the fixed stand 7, the terminal post at the left end of the battery cell to be tested is in direct contact with the detection head when the battery cell is placed on the platform 6. Therefore, the detection light is no longer needed to assist in positioning during the testing process.

[0055] It should be noted that in the description of this utility model, the terms "center," "longitudinal," "transverse," "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 used 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. Therefore, they should not be construed as limitations on this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0061] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A test head for testing battery cells, comprising a conductive contact (1) and a mounting component for connecting the conductive contact (1), characterized in that: The conductive contact (1) consists of two clamping blocks (1.1) that can close together or move away from each other. A clamping space (1.2) for clamping the upper tab of the soft-pack battery cell is formed between the two clamping blocks (1.1). When the two clamping blocks (1.1) in the conductive contact (1) are in the closed state, the outer contour of the conductive contact (1) matches the pole (2.1) in the hard-pack battery cell (2) to be tested. The mounting component includes a fixed bracket (3) connected to two clamping blocks (1.1) respectively and a telescopic mechanism. The telescopic mechanism is configured to drive the corresponding clamping block (1.1) to move relative to or away from the other clamping block (1.1). Alternatively, the mounting component may include two telescopic mechanisms, each connected to its corresponding clamp (1.1), for driving the two clamps (1.1) to move relative to or away from each other.

2. The detection head for cell testing according to claim 1, characterized in that: The telescopic mechanism is a telescopic cylinder (4). The piston rod (4.1) in the telescopic cylinder (4) is fixedly connected to the back of the corresponding clamping block (1.1) and is used to drive the corresponding clamping block (1.1) to move toward or away from another clamping block (1.1).

3. The detection head for cell testing according to claim 1, characterized in that: The cross-section of the clamp (1.1) is semi-circular, so that when the two clamps (1.1) in the conductive contact (1) are closed relative to each other, the outer contour of the cross-section of the conductive contact (1) is circular.

4. The detection head for cell testing according to claim 1, characterized in that: The conductive contact (1) has a small hole (1.3) at the center of its cross-section, which is formed by two clamping blocks (1.1).

5. The detection head for cell testing according to claim 1, characterized in that: The two clamping blocks (1.1) have several toothed protrusions (1.6) on their respective mating surfaces (1.4).

6. The detection head for cell testing according to claim 5, characterized in that: The middle position of the bonding surface (1.4) is recessed to form a shallow groove (1.5), and the toothed protrusions (1.6) are evenly distributed in the shallow groove (1.5). The tooth tips of the toothed protrusions (1.6) are flush with or lower than the horizontal plane of the bonding surface (1.4). The toothed protrusions (1.6) are attached with removable conductive stickers.

7. The detection head for cell testing according to claim 5, characterized in that: The tips of the teeth of the tooth-shaped protrusions (1.6) are all smooth arc surfaces.

8. A battery cell testing device, characterized in that: The device includes a base (5), a platform (6) on the base (5) for placing the battery cell to be tested, and upright plates arranged on both sides of the platform (6). At least one of the upright plates is slidably engaged with the base (5) so that the two upright plates can move relative to or away from each other. The base (5) is provided with a translation mechanism (9) for driving the upright plates to move relative to the base (5). The two upright plates are respectively provided with a detection head of any one of claims 1 to 7 at the position corresponding to the battery cell to be tested. The mounting part in the detection head is connected to the corresponding upright plate.

9. The cell testing apparatus according to claim 8, characterized in that: The translation mechanism (9) includes a lead screw (9.1) that rotates with the base (5) and is arranged horizontally along the length of the base (5), and a lead screw nut (9.2) that is threaded with the lead screw (9.1). The end of the lead screw (9.1) that is exposed outside the base (5) is provided with a hand crank (9.3). The two uprights include a fixed upright (7) and a movable upright (8). The fixed upright (7) is fixed to the base (5), and the bottom of the movable upright (8) is fixed to the lead screw nut (9.2).

10. The cell testing apparatus according to claim 8, characterized in that: The upright plate is provided with a laser locator (10), which corresponds to the position of the detection head on the upright plate, so that the light emitted by the laser locator (10) can pass through the clamping space (1.2) on the detection head and irradiate the side of the detection head away from the laser locator (10).

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