Square lithium battery cell pressure test equipment

Abstract

The utility model relates to the technical field of battery detection, in particular to square lithium battery cell pressure testing equipment. The device comprises a detection table and a detection assembly used for detecting the pressure of a battery cell, an elastic movable clamping plate slides on the table top of the detection table, a fixed clamping plate fixed to the detection table is arranged on the extension line of the sliding path of the elastic movable clamping plate, and an elastic clamping channel used for elastically clamping the side wall of the battery cell is defined by the elastic movable clamping plate and the fixed clamping plate; the detection assembly comprises two conductive heads distributed on the end side of the elastic clamping channel, and the conductive heads and the elastic movable clamping plate are driven by a power mechanism and synchronously gather towards the inner side and unfold towards the outer side. The battery cell clamping device is convenient to operate, and can accurately clamp the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field, concretely is a square lithium battery electric core pressure test equipment. BACKGROUND

[0002] Square lithium battery is a kind of battery type, its appearance is square or approximate square, and it is different from traditional cylindrical electric core and circular battery, square lithium battery has the advantages such as high energy density, high power density, long service life, and its internal structure optimization also makes it have higher power density and energy density.

[0003] In the production process of square lithium battery, the power withstand voltage test of electric core needs to be carried out, to ensure the accuracy of test, the test process needs to ensure that the battery is in a stable detection environment;Such as the text of the name of a lithium battery electric core pressure detection device of Chinese patent patent No. CN219328878U is recorded, set apart two limit blocks, position the position of lithium battery two sides;And through the conductive block distributed at the two ends of lithium battery, do close and apart movement, to respectively with battery power on and power off.

[0004] In actual implementation, due to the limitation of machining precision of limit block, and in order to place lithium battery quickly in detection process, the gap between limit block for positioning the position of lithium battery two sides and lithium battery often exists. The existence of the gap makes the electrode position of lithium battery not completely constant when lithium battery is placed between two limit blocks, which causes the conductive block to do close movement, and the conductive block cannot guarantee perfect fit with the electrode of lithium battery, affecting the stability of power transmission, and further affecting the accuracy of test. In addition, due to the existence of the above gap, lithium battery is in the state of relative movement between two positioning blocks, at this time, the main component for maintaining the stable state of lithium battery is the conductive block abutting with the electrode at both ends of lithium battery, obviously, there is the case that the battery is not fixed stably.

[0005] In order to solve the problems of inaccurate positioning of lithium battery and insufficient stability of lithium battery fixation, the prior art mostly adopts the mode of setting another set of clamping mechanism. But the mode of setting another clamping mechanism not only increases the positioning process of operating clamping mechanism in the test steps of lithium battery, which makes the test process of lithium battery more complicated. In addition, since the electric core cannot move after being clamped, the distance between the electric core two ends and the two conductive blocks must be accurately controlled during the clamping process of electric core, so that the two conductive blocks can be stably fitted with the electrodes at both ends of electric core. The clamping precision of clamping mechanism for clamping electric core is extremely high, which further increases the complexity of electric core test, therefore, it is urgent to be solved. Utility model content

[0006] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a square lithium battery cell pressure test equipment, not only convenient operation, can realize accurate clamping to the cell.

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] A square lithium battery cell pressure test equipment, including detection platform and the detection component for detecting the cell pressure, the sliding path of the elastic dynamic clamping plate of detection platform top surface has the fixed clamping plate of setting up with the fixed detection platform, by the elastic dynamic clamping plate and fixed clamping plate enclose and form the elastic clamping channel of the elastic clamping cell side wall, the detection component includes two distribution in the elastic clamping channel end side's conducting head, and conducting head and elastic dynamic clamping plate are all by power mechanism drive, and gather to the inside and spread out to the outside synchronously.

[0009] As a further scheme of the utility model: the power mechanism includes the drive screw rod that cooperates in the detection platform, and the drive screw rod is arranged along the sliding direction of the elastic dynamic clamping plate, and the adjusting slider of the screw block mechanism is fixed on the elastic dynamic clamping plate with the drive screw rod, and the gear is coaxially fixed on the drive screw rod, and at least one conducting head is fixed with the rack meshing with the gear, and the rack is horizontally arranged perpendicular to the direction of the drive screw rod. The form of screw block mechanism cooperation gear rack meshing can be driven by motor or manual, not only transmission stable, but also have certain locking effect.

[0010] As a further scheme of the utility model: two conducting heads are fixed with the rack meshing with the gear, and two racks are horizontally arranged perpendicular to the direction of the drive screw rod, and two racks are arranged above and below the gear respectively, so that the two conducting heads can be driven synchronously to move close to each other and move away from each other, and the electrodes at both ends of the cell are respectively contacted and disconnected, and the synchronous driving mode of the two conducting heads improves the effect and efficiency of the clamping action of the conducting head.

[0011] As a further scheme of the utility model: the elastic dynamic clamping plate includes a dynamic plate connected with the power mechanism, a sliding rod is slidably penetrated on the dynamic plate, the sliding rod is arranged along the sliding direction of the elastic dynamic clamping plate, and the end of the sliding rod adjacent to the fixed clamping plate is fixed with an elastic clamping plate, a spring is arranged on the sliding rod, and the spring generates an elastic driving force for driving the elastic clamping plate to move towards the fixed clamping plate. Thus, the approaching and separating actions of the two conductive heads sliding simultaneously can be realized, the clamping effect on the battery cell is improved through the bidirectional clamping mode.

[0012] As a further scheme of the utility model: the detection assembly is fixed above the detection table through the support plate, which is convenient for the detection personnel to operate and observe the detection assembly.

[0013] As a further scheme of the utility model: the support plate is arranged in two groups at intervals, and the two groups of support plates are arranged on the outer sides of the sliding paths of the two conductive heads respectively, the connecting wires on the two conductive heads are connected with the detection assembly after penetrating to the outer side of the support plate, so that the movement path of the connecting wires and the conductive heads is avoided, and the winding of the connecting wires is also prevented.

[0014] As a further scheme of the utility model: the connecting section of the connecting wire and the conductive head is in a spiral structure, and when the conductive head slides, the spiral connecting section is synchronously stretched or contracted, so that the whole sliding of the connecting wire is not needed, and the regular connecting wire is further facilitated.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. When the elastic dynamic clamping plate slides close to the fixed clamping plate, the elastic dynamic clamping plate elastically extrudes the side wall of the battery cell and is positioned and attached to the fixed clamping plate, so that the axial position of the battery cell is constant, and the positioning of the battery cell is realized. At this time, since the battery cell is elastically extruded by the elastic dynamic clamping plate, the battery cell can also slide along the axial line in the state of elastic extrusion; therefore, during the placement of the battery cell, the distance between the electrodes at both ends of the battery cell and the two conductive heads does not need to be accurately considered, even if one of the conductive heads does not completely attach to the electrode of the battery cell, the battery cell can also slide along the axial line under the continuous sliding of the conductive head, so that the two conductive heads are stably attached to the electrodes of the battery cell, thereby ensuring the stable testing of the battery cell and improving the convenience in the battery cell testing process.

[0017] In addition, the conductive head and the elastic dynamic clamping plate are driven by the power mechanism and are synchronously gathered to the inside and expanded to the outside, so that the elastic dynamic clamping plate and the conductive head do not need to be driven separately, and the convenience and efficiency of the battery cell detection are further improved.

[0018] 2、drive the elastic dynamic clamping plate to move to the fixed clamping plate while driving the screw rod to rotate clockwise, and drive the electric head to make synchronous movement by meshing of the gear and the rack, so as to realize the synchronous operation of fixing and connecting the electric core; similarly, when the driving screw rod rotates counterclockwise, the synchronous operation of contact fixing and power-off of the electric core is realized. The form of screw rod and sliding block mechanism cooperating with gear and rack meshing can be driven by motor or manually, which is not only stable in transmission, but also has certain locking effect.

[0019] 3、Two electric heads are fixed with racks meshing with the gear, and the two racks are arranged horizontally perpendicular to the direction of the driving screw rod, and the two racks are arranged above and below the gear respectively, so that the two electric heads can realize the similar and separate actions of sliding at the same time, and the clamping efficiency and effect of the electric core are improved by the bidirectional clamping mode.

[0020] 4、Adopting the dynamic plate as a supporting piece, the sliding rod as a guide piece, and the spring to apply elastic force, it is ensured that the elastic clamping plate can stably generate radial elastic extrusion force on the electric core, and the stable elastic clamping of the electric core is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model.

[0022] Figure 2 It is a three-dimensional back view structural schematic view of the detection table in the utility model.

[0023] Figure 3 It is a structural schematic view of the power mechanism in the utility model.

[0024] In the drawing: 10, detection table; 11, supporting plate; 20, electric head; 21, rack; 30, fixed clamping plate; 40, elastic dynamic clamping plate; 41, elastic clamping plate; 42, spring; 43, sliding rod; 44, dynamic plate; 45, adjusting sliding block; 50, driving screw rod; 51, gear; 60, detection assembly; 61, connecting wire. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] For the convenience of understanding, the specific structure and working mode of the utility model are described as follows in combination with the drawings:

[0027] The specific structure of the utility model is referred toFigures 1-3 As shown in the drawings, the main structure thereof comprises a detection table 10 and a detection assembly 60 for detecting the pressure of the battery cell. Among them, a straight reciprocating sliding elastic movable clamping plate 40 is arranged on the table top of the detection table 10, and a fixed clamping plate 30 fixed with the detection table 10 is arranged on the extension line of the sliding path of the elastic movable clamping plate 40, and an elastic clamping channel for elastically clamping the side wall of the battery cell is formed by the elastic movable clamping plate 40 and the fixed clamping plate 30. In the present application, the elastic movable clamping plate 40 is elastically extruded against the side wall of the battery cell when it slides close to the fixed clamping plate 30, and is positioned and attached to the fixed clamping plate 30. Since the fixed clamping plate 30 is stationary, when the elastic movable clamping plate 40 is extruded against the fixed clamping plate 30, the axial position of the battery cell can be ensured, and the positioning of the battery cell can be realized. At this time, since the battery cell is elastically extruded by the elastic movable clamping plate 40, the battery cell can also slide along its own axis in the state of elastic extrusion, so that the distance between the electrodes at both ends of the battery cell and the two conductive heads 20 does not need to be accurately considered during the placement of the battery cell, and a technical platform is provided for the stable attachment of the two conductive heads 20 to the electrodes at both ends of the battery cell. Thus, on the basis of ensuring the stable testing of the battery cell, the convenience in the testing process of the battery cell is improved.

[0028] Specifically, as shown in the drawings, Figure 1 The two conductive heads 20 of the detection assembly 60 are distributed at both ends of the battery cell, and can be moved close to each other and away from each other to respectively abut against the electrodes at both ends of the battery cell to make contact and be separated. In actual implementation, the conductive head 20 can adopt the form of single sliding of one conductive head 20 or sliding of both conductive heads 20. By moving the conductive heads 20 close to each other, the conductive heads 20 are attached to the electrodes at the end of the battery cell. Since the battery cell can slide along its own axis under elastic clamping, even if one of the conductive heads 20 does not completely attach to the electrode of the battery cell, the battery cell can also slide along its own axis under the continuous sliding of the conductive heads 20, so that the two conductive heads 20 are stably attached to the electrodes of the battery cell, and the stability of the battery cell testing is ensured.

[0029] In addition, as shown in the drawings, Figure 1 and Figure 3 The conductive heads 20 and the elastic movable clamping plate 40 are driven by a power mechanism and are synchronously gathered to the inside and expanded to the outside, without the need to separately drive the elastic movable clamping plate 40 and the conductive heads 20, further improving the convenience and efficiency of the battery cell detection.

[0030] Specifically, as shown in the drawings, Figure 1 and Figure 3As shown, the power mechanism includes a driving screw 50 which is pivotally fitted on the detection table 10, the driving screw 50 is arranged along the sliding direction of the elastic movable clamping plate 40, and the elastic movable clamping plate 40 is fixed with an adjusting sliding block 45 which forms a screw sliding block mechanism with the driving screw 50. By rotating the driving screw 50, the adjusting sliding block 45 can be driven to move the elastic movable clamping plate 40 to approach or move away from the fixed clamping plate 30. Specifically, the driving screw 50 can be driven by a motor or manually driven by a hand wheel. On the basis of the above, as shown in Figure 1 and Figure 3 the driving screw 50 is coaxially fixed with a gear 51, at least one of the conductive heads 20 is fixed with a rack 21 which is engaged with the gear 51, and the rack 21 is horizontally arranged perpendicular to the direction of the driving screw 50. Specifically, when the driving screw 50 is rotated clockwise to drive the elastic movable clamping plate 40 to move towards the fixed clamping plate 30, the gear 51 and the rack 21 are engaged to drive the conductive heads 20 to move synchronously, thereby realizing the synchronous operation of fixing and connecting the power supply of the battery cell; similarly, when the driving screw 50 is rotated counterclockwise, the synchronous operation of fixing and disconnecting the power supply of the battery cell is realized. In this embodiment, the form of the screw sliding block mechanism combined with the engagement of the gear 51 and the rack 21 can be driven by a motor or manually driven by a hand wheel, which not only has stable transmission but also has certain locking effect.

[0031] In actual implementation, the power mechanism can also adopt other forms, such as retaining the gear 51 and the rack 21 structure, which is different from the above embodiment. In this embodiment, the gear 51 is not fixed with the driving screw 50, but is pivotally fitted on the detection table 10. In addition, the gear 51 is coaxially fixed with a first bevel gear. The detection table 10 is also pivotally fitted with a second bevel gear which is engaged with the first bevel gear. The second bevel gear is perpendicular to the axis of the first bevel gear, and the second bevel gear is coaxially fixed with a gear ring. The elastic movable clamping plate 40 is driven by a pneumatic cylinder, and the extension end of the pneumatic cylinder is connected with a gear rod which is engaged with the gear ring, so that the synchronous inward gathering and outward unfolding of the conductive heads 20 and the elastic movable clamping plate 40 can also be realized.

[0032] In addition, in actual implementation, the power mechanism also has other embodiments, such as arranging a screw along the sliding direction of the conductive heads 20, and arranging a sliding block on the conductive heads 20 which forms a screw sliding block mechanism with the screw. When only one conductive head 20 needs to slide, the screw is a one-way screw; when two conductive heads 20 need to slide, the screw can be arranged as a two-way screw. In addition, the screw is coaxially fixed with a gear ring, the elastic movable clamping plate 40 is driven by a pneumatic cylinder, and the extension end of the pneumatic cylinder is connected with a gear rod which is engaged with the gear ring, so that the synchronous inward gathering and outward unfolding of the conductive heads 20 and the elastic movable clamping plate 40 can also be realized.

[0033] In specific implementation, as shown in Figure 1 and Figure 3As shown, the two conductive heads 20 are fixed with the gear racks 21 which are engaged with the gear 51, the two gear racks 21 are horizontally arranged perpendicular to the direction of the driving lead screw 50, and the two gear racks 21 are arranged above and below the gear 51 respectively, so as to drive the two conductive heads 20 to make synchronous approaching and separating actions, and respectively abut against the electrodes at the two ends of the battery cell to connect and disconnect the electricity, through the bidirectional clamping mode, the clamping efficiency and effect on the battery cell are improved.

[0034] On the basis of the above, Figure 2 and Figure 3 As shown, the elastic movable clamping plate 40 comprises a movable plate 44 connected with the power mechanism, the movable plate 44 is slidably penetrated by a slide rod 43, the slide rod 43 is arranged along the sliding direction of the elastic movable clamping plate 40, and one end of the slide rod 43 adjacent to the fixed clamping plate 30 is fixed with an elastic clamping plate 41, and the slide rod 43 is provided with a spring 42 which generates an elastic driving force to drive the elastic clamping plate 41 to move towards the fixed clamping plate 30. In the embodiment, the movable plate 44 is fixedly connected with the adjusting slide block 45, and of course, in the embodiment driven by the air cylinder, the movable plate 44 is connected with the telescopic end of the air cylinder. The movable plate 44 is used as a support, the slide rod 43 is used as a guide, and the spring 42 exerts an elastic force, so as to ensure that the elastic clamping plate 41 can stably generate a radial elastic extrusion force on the battery cell, and ensure stable elastic clamping of the battery cell. In actual implementation, the elastic movable clamping plate 40 can also have a structure with elasticity itself, such as the arc-shaped elastic sheet or the elastic air bag structure in the prior art, which can exert an elastic clamping force on the battery cell.

[0035] On the basis of the above, Figure 1 As shown, the detection assembly 60 is fixed above the detection table 10 through the support plate 11, so as to facilitate the operation and observation of the detection assembly 60 by the detection personnel.

[0036] In addition, as shown, Figure 1 The support plate 11 is arranged in two groups which are spaced apart, and the two groups of support plates 11 are arranged outside the sliding paths of the two conductive heads 20, and the connecting wires 61 on the two conductive heads 20 are connected with the detection assembly 60 after penetrating to the outside of the support plate 11, so that the movement path of the connecting wires 61 and the conductive heads 20 is avoided, and the winding of the connecting wires 61 is also prevented.

[0037] Further, the connecting section of the connecting wire 61 and the conductive head 20 is in a spiral structure, and when the conductive head 20 slides, the spiral connecting section is synchronously stretched or contracted, and the whole connecting wire 61 does not need to slide, which further facilitates the regular connection of the connecting wire 61.

[0038] Of course, the utility model is not limited to the details of the above exemplary embodiments for those skilled in the art, and also includes the same or similar structures that can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

[0040] The technical, shape, structure parts not described in detail in the utility model are well-known technologies.

Claims

1. A square lithium battery cell pressure testing apparatus comprising a detection table (10) and a detection assembly (60) for detecting a cell pressure, characterized in that, The elastic movable clamping plate (40) is slid on the table top of the detection table (10), a fixed clamping plate (30) is arranged on the extension line of the sliding path of the elastic movable clamping plate (40) and is fixed with the detection table (10), and the elastic movable clamping plate (40) and the fixed clamping plate (30) form an elastic clamping channel for elastically clamping the side wall of the battery cell.

2. The square lithium battery cell pressure testing apparatus of claim 1, wherein, The power mechanism comprises a driving screw rod (50) which is revolved and matched on the detection table (10), the driving screw rod (50) is arranged along the sliding direction of the elastic movable clamping plate (40), the elastic movable clamping plate (40) is fixed with an adjusting sliding block (45) which constitutes a screw rod and sliding block mechanism with the driving screw rod (50), the driving screw rod (50) is coaxially fixed with a gear (51), at least one of the conductive heads (20) is fixed with a rack (21) which is engaged with the gear (51), and the rack (21) is horizontally arranged perpendicularly to the direction of the driving screw rod (50).

3. The square lithium battery cell pressure testing apparatus of claim 2, wherein, The two conductive heads (20) are fixed with the racks (21) which are engaged with the gear (51), the two racks (21) are horizontally arranged perpendicularly to the direction of the driving screw rod (50), and the two racks (21) are arranged above and below the gear (51) respectively, so that the two conductive heads (20) can be synchronously close to each other and away from each other, and the electrodes at both ends of the battery cell are respectively contacted and disconnected.

4. The square lithium battery cell pressure testing apparatus according to any one of claims 1-3, wherein, The elastic movable clamping plate (40) comprises a movable plate (44) connected with the power mechanism, the movable plate (44) is slid through a sliding rod (43), the sliding rod (43) is arranged along the sliding direction of the elastic movable clamping plate (40), one end of the sliding rod (43) adjacent to the fixed clamping plate (30) is fixed with an elastic clamping plate (41), and the sliding rod (43) is provided with a spring (42) which generates an elastic driving force for driving the elastic clamping plate (41) to move towards the fixed clamping plate (30).

5. The square lithium battery cell pressure testing apparatus according to any one of claims 1-3, wherein, The detection assembly (60) is fixed above the detection table (10) through the support plate (11).

6. The square lithium battery cell pressure testing apparatus of claim 5, wherein, The support plate (11) is arranged in two groups which are spaced apart, the two groups of support plates (11) are arranged outside the sliding paths of the two conductive heads (20) respectively, and the connecting wires (61) on the two conductive heads (20) are connected with the detection assembly (60) after penetrating to the outside of the support plate (11).

7. The square lithium battery cell pressure testing apparatus of claim 6, wherein, The connecting section of the connecting wire (61) and the conductive head (20) is in a spiral structure.

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