Capacitance grading device of battery cell

Abstract

The utility model provides a capacity grading device for a battery cell, and relates to the technical field of battery cell capacity grading equipment. By arranging the support, the multiple layers of horizontal frames can be used for containing the battery cells, and therefore capacity grading treatment can be conducted on the multiple battery cells. The clamp fixing seat is used for fixing the clamp, the clamp can be stably placed and does not fall off when not in use, and when the clamp is in use, the clamp can directly clamp a tab of a battery cell through the arrangement of the clamp fixing seat and the battery cell placing position so as to carry out charging and discharging tests. And the design of the clamp fixing seat enables the capacity grading operation of the battery core to be safer and more convenient, ensures the service life and cannot be accidentally damaged. Besides, through the design of the connecting assemblies and the positioning parts, the distance between the clamp fixing seats and the distance between the two adjacent layers of horizontal frames can be adjusted according to the sizes of different battery cells, so that more battery cells of different models can be accommodated, and the capacity grading device for the battery cells is higher in universality.

Description

Technical Field

[0001] The utility model relates to the technical field of cell grading equipment, and more specifically, to a cell grading device. Background Art

[0002] After the production of a single cell of a battery is completed, due to the constraints of the battery production process, the parameter consistency in terms of capacity, voltage, current, internal resistance, etc. is not high. It is necessary to fully charge the battery according to the specifications on the equipment, and then discharge it according to the specified current until the battery is completely discharged. The time taken for discharging multiplied by the discharge current is the capacity of the battery. Only when the capacity of the tested battery meets or exceeds the designed capacity is the lithium battery qualified, and a battery with a capacity less than the designed capacity is not considered a qualified battery. The process of screening out qualified batteries through capacity testing is called grading. By grading, cells with consistent performance and similar capacities are selected, so that the performance of such a battery pack can be more stable and the operation can be smoother.

[0003] However, when grading cells at present, there is no suitable cell storage device, resulting in no fixed position for the clips used to connect the cell tabs during the grading process. At the same time, the cable connected to the clips is long and heavy. When grading different types of cells, the cable needs to be dragged to ensure that the clips hold the cell tabs. The process of dragging the cable is laborious, and for each type of cell, the position of the cable and the clips needs to be adjusted manually, resulting in low efficiency. Also, because the cable is heavy, if the clip has no fixed position and falls after being dragged by the cable, it is easy to cause the clip to be damaged, affecting the smooth progress of the grading process.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a cell grading device, which can fix the position of the clips, drive the cable to move, avoid damage to the clips, and can also adapt to different types of cells for grading.

[0006] The embodiments of the present utility model are implemented as follows:

[0007] In a first aspect, the present utility model provides a cell grading device, including a bracket, a connection assembly, and a clip fixing seat. The bracket includes a plurality of columns and a horizontal frame connecting the plurality of columns. Among them, the columns can be considered as vertical columns or columns with a certain inclination angle. Therefore, in some embodiments, the bracket formed by the columns and the horizontal frame is in any one of the shapes of a cylinder, a prism, a frustum of a cone, or a frustum of a pyramid to adapt to the grading of cells with different shapes.

[0008] In an alternative embodiment, since the structure of the bracket can be a cylindrical or prismatic structure, etc., each corresponding horizontal frame includes either multiple interconnected cross columns or a circular ring. It can be understood that when the structure of the bracket is cylindrical or frustum-shaped, each horizontal frame is a circular ring structure; when the structure of the bracket is prismatic or frustum-shaped, each horizontal frame includes multiple interconnected cross columns, and the number of cross columns is equal to the number of edges of the prism or frustum.

[0009] Preferably, since the cells to be capacitance-tested are generally tetrahedral structures, such as cuboids or cubes, in order to rationally utilize the space of the capacitance-testing device for the cells, the shape of the bracket is prismatic, and the number of vertical columns is equal to the number of cross columns of the horizontal frame.

[0010] Specifically, the prism can be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc. In order to further ensure the rational utilization of the space of the capacitance-testing device for the cells, the shape of the bracket is a quadrangular prism. Among them, the quadrangular prism can be cuboid-shaped and cube-shaped. If you want to accommodate several more groups of cells, then a cuboid-shaped bracket structure can be adopted to increase the number of cells that can be accommodated.

[0011] Furthermore, there are multiple horizontal frames of the bracket, and they are arranged at intervals along the axial direction of the vertical column. The connection between the horizontal frame and the vertical column is selectively and movably connected through a connection component.

[0012] Since multiple horizontal frames are arranged at intervals along the axial direction of the vertical column, multiple horizontal frames can divide the whole bracket into a multi-layer structure. Each layer of horizontal frame can be used to place cells and perform capacitance-testing processing, increasing the number of cells that can be capacitance-tested.

[0013] In addition, since the connection between the horizontal frame and the vertical column is selectively and movably connected through a connection component, the distance between adjacent two layers of horizontal frames can be adjusted according to the size of the cells to be placed on each layer, making the capacitance-testing device for the cells provided by the present invention more versatile. It can not only be applicable to the existing capacitance-testing of cells, such as cells of model ABT110999569, but also be applicable to the capacitance-testing processing of other new large cells. The movable connection manner between the horizontal frame and the vertical column is related to the structure of the connection component, and this content will be described in detail at the structure of the connection component.

[0014] In addition, since the structures of adjacent two layers of horizontal frames can be adjusted according to the cell models to be capacitance-tested, when multiple horizontal frames are arranged at intervals along the axial direction of the vertical column, they can be arranged at uniform intervals or not at uniform intervals, as long as they can accommodate the cells to be capacitance-tested.

[0015] Since the horizontal frame is a multi-layered structure, a cell placement position is provided on each horizontal frame for accommodating cells.

[0016] In an alternative embodiment, the battery cell placement position includes a laminate and / or a grid frame. The laminate is fixed to the surface of the horizontal frame, and the grid frame is fixed inside the horizontal frame.

[0017] For example, on the horizontal frame of each layer, a grid frame can be formed by welding in the middle of the frame or by movably connecting with a connecting component. The grid size of the grid frame can be determined according to the shape and size of the battery cell to ensure the stable placement of the battery cell. In addition, a laminate can be directly fixed on the surface of the frame of the horizontal frame, which can be fixed by screws or by welding, for placing the battery cell. Further, in order to ensure the stable and safe placement of the battery cell, the form of laminate + grid frame can also be used as the battery cell placement position. The grid frame provides support in the middle of the horizontal frame, and the laminate provides a stable and safe position for the placement of the battery cell.

[0018] It can be understood that since the grading device of the battery cells of the present utility model includes multiple layers of horizontal frames, the battery cell placement positions of each layer of the horizontal frame can have the same structure, such as the form of laminate + grid frame, or each layer can have a different structure, as long as the stable placement of the battery cells can be ensured.

[0019] Further, an even number of clip fixing seats other than zero are connected to the horizontal frame on one side of the battery cell placement position. The clip fixing seat is a device for fixing clips. Since the grading process of the battery cells requires charging the battery cells first and then discharging them, one of the structures for realizing the charging and discharging of the battery cells is the clip. Generally, one end of the clip is connected to the tab of the battery cell, and the other end is connected to the cable. In this way, the charging and discharging of the battery cell can be realized.

[0020] For the current battery cell grading device, especially for the large battery cells of the ABT110999569 model, its grading rack does not have a structure for fixing clips, and the cable is long and heavy, which easily causes the clip to fall to the ground due to the dragging effect of the cable, resulting in damage to the clip and affecting the normal progress of the battery cell grading process. The present utility model movably connects the clip fixing seat on each layer of the horizontal frame. When the battery cell grading process is not required, the clip can also be fixed on the clip fixing seat, avoiding the problem of the clip falling and being damaged due to the dragging of the cable. At the same time, since the clip fixing seat is correspondingly arranged with the battery cell placement position on the horizontal frame, the clip is fixed on the clip fixing seat, and the cable also follows the position of the clip. Therefore, during the battery cell grading, the tab of the battery cell can be directly connected to the clip, saving the laborious process of dragging the cable back and forth.

[0021] In an alternative embodiment, in order to facilitate the placement of the clip and the cable, the clip fixing seat extends out of the bracket.

[0022] In some embodiments, the clip fixing base is a plate-like structure having the same size as or slightly larger than the clip, and at least two through fixing holes for fixing the clip are formed thereon. When the clip is fixed on the clip fixing base, a threaded connecting member, such as a screw, a bolt or a nut, can be used to pass the threaded connecting member through the countersunk hole of the clip and then fixed in the fixing hole of the clip fixing base.

[0023] Preferably, the number of the fixing holes can be determined according to actual needs and the number of the countersunk holes on the clip, as long as it is ensured that the clip can be stably fixed on the clip fixing base.

[0024] In an alternative embodiment, each horizontal frame is surrounded by a plurality of interconnected cross columns, and the cross column for connecting with the clip fixing base is the first cross column. According to the different number of battery cells placed on each layer of the horizontal frame, multiple groups of clip fixing bases can be provided. One clip fixing base fixes one clip, and one clip clamps one positive tab or one negative tab. Then, two clip fixing bases are required to place one battery cell on one layer of the horizontal frame, and four clip fixing bases are required to place two battery cells on one layer of the horizontal frame, and so on. Each group of clip fixing bases can be fixed on the same first cross column or on different first cross columns. Therefore, each layer of the horizontal frame has at least one first cross column.

[0025] Furthermore, since the distances between the two tabs of different battery cell models are different, in order to ensure that the battery cell grading device provided by the present utility model can be used for grading various models of battery cells, the horizontal frame and the clip fixing base are also selectively movably connected through a connecting component. Therefore, the distance between the clip fixing bases can be adjusted by adjusting the position of the connecting component.

[0026] Even further, the above-mentioned movable connection manner of the connecting component can refer to the following content.

[0027] Positioning parts are provided on the upright column, the horizontal frame and the clip fixing base, and the connecting component is cooperatively connected with the positioning parts. In an alternative embodiment, the positioning part is a groove or a hole.

[0028] Among them, when the positioning part is a groove, the groove can be a continuous groove or a discontinuous groove; when the positioning part is a hole, a plurality of holes are provided on the upright column, the horizontal frame and the clip fixing base to ensure that the connecting component can be positioned and installed in different holes, so as to realize the adjustment of the distance between adjacent two layers of horizontal frames and the distance between two clip fixing bases.

[0029] It can be understood that since the horizontal frame has multiple layers, multiple connecting components are required to fix the multiple-layer horizontal frame. Similarly, each layer of the horizontal frame has at least two clip fixing seats, so in order to movably connect the clip fixing seats, the number of connecting components also needs to be multiple.

[0030] Each connecting component includes a right-angled connecting piece and a threaded connecting piece. Through holes are provided on both faces of the right-angled connecting piece that are perpendicular to each other. The threaded connecting piece passes through the through hole and cooperates with the positioning part for fixation. When it is necessary to adjust the distance between adjacent two layers of the horizontal frame or the distance between adjacent two clip fixing seats, the threaded connecting piece can be loosened, and then the right-angled connecting piece is moved to a suitable position. Then the threaded connecting piece is tightened again and accommodated in the positioning part, completing the adjustment of the layer height of the cell grading device and the distance between adjacent two clip fixing seats to adapt to the grading requirements of different models of cells.

[0031] In an alternative embodiment, when the bracket is a prism, the positioning part is a groove. To ensure the stable connection between the horizontal frame and the column, at least two continuous grooves parallel to the axial direction of the column are provided on the column, respectively used to cooperate with the connecting components to fix the two cross columns of the horizontal frame connected to the column.

[0032] In some embodiments, when the cell placement position includes a grid frame and the grid size of the grid frame can be adjusted movably, to ensure the connection between the grid frame and the horizontal frame, at least one groove parallel to the axial direction of each cross column is provided on the cross columns of the horizontal frame. In addition, since a clip fixing seat is also connected to the first cross column of the horizontal frame, another groove parallel to the axial direction of the first cross column is provided on the first cross column. A groove perpendicular to the axial direction of the first cross column is provided on the clip fixing seat. Through the cooperation of the right-angled connecting piece and the threaded connecting piece, the clip fixing seat is fixed on the first cross column.

[0033] In an alternative embodiment, to ensure the stability of the bracket, the whole bracket is made of aluminum profiles or other alloys or metal materials. To ensure the safety of charging and discharging during the grading process, the clip fixing seat and the cell placement position are made of insulating materials, such as epoxy resin plates with antistatic effects, to prevent the short circuit of the cells.

[0034] In some embodiments, the distance between adjacent two clip fixing seats is 50 - 1040 mm. Therefore, for different models of cells, the distance between adjacent two clip fixing seats can be adjusted according to the distance between the positive and negative electrode tabs of the cells.

[0035] In some embodiments, the distance between adjacent two layers of the horizontal frame is 50 - 300 mm, which can adapt to different models and different heights of cells, improving the versatility of the cell grading device.

[0036] In an alternative embodiment, to facilitate the movement of the capacity grading device for the battery cells, a bottom plate and a sliding part are further included. The bottom plate is fixed on the horizontal frame of the end face of the bracket, the sliding part is installed on the bottom plate, and the sliding part protrudes from one end of the bottom plate away from the bracket. The sliding part contacts the ground, and the displacement of the capacity grading device for the battery cells is realized during the process of sliding on the ground.

[0037] Preferably, the sliding part is a roller, and the number of the sliding parts is 4, which are evenly spaced around the bottom plate.

[0038] The beneficial effects of the embodiments of the present utility model are as follows:

[0039] The present utility model provides a capacity grading device for battery cells. By providing a bracket, the multiple layers of horizontal frames therein can be used to place the battery cells, so that multiple battery cells can be placed for capacity grading processing. A clip fixing seat is installed on one side of the battery cell placement position on each horizontal frame. Therefore, when the battery cell is placed in the battery cell placement position on the horizontal frame, the tab can face the direction of the clip fixing seat. The clip fixing seat is used to fix the clip, so that the clip can be stably placed and will not fall when not in use, while when in use, the clip can directly clamp the tab of the battery cell for charge and discharge testing. The design of the clip fixing seat makes the capacity grading operation of the battery cells safer, more convenient and ensures its service life without accidental damage. In addition, through the design of the connecting component and the positioning part, the distance between the clip fixing seats and the distance between adjacent two layers of horizontal frames can be adjusted according to the sizes of different battery cells. Therefore, more different models of battery cells can be accommodated, making the capacity grading device for the battery cells more versatile. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a schematic structural diagram of the capacity grading device for the battery cells provided by the embodiment of the present utility model;

[0042] Figure 2 It is a schematic structural diagram of the upright column provided by the embodiment of the present utility model;

[0043] Figure 3 It is a schematic structural diagram of the horizontal frame provided by the embodiment of the present utility model;

[0044] Figure 4 It is a schematic structural diagram of the cross column provided by the embodiment of the present utility model;

[0045] Figure 5 is Figure 1 an enlarged view of structure A in

[0046] Icon: 100 - grading device for battery cells; 110 - bracket; 111 - column; 112 - horizontal frame; 1121 - cross bar; 1122 - first cross bar; 120 - connection component; 121 - right - angled connector; 122 - threaded connector; 130 - clip fixing seat; 131 - fixing hole; 141 - laminate; 142 - grid frame; 150 - groove; 160 - bottom plate; 170 - sliding part. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0049] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0051] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0052] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0053] Please refer to Figure 1 、 Figure 2 and Figure 3 , this embodiment provides a grading device 100 for battery cells, which includes a bracket 110, a connection component 120, and a clip fixing seat 130. The bracket 110 is generally in a cuboid structure and includes four columns 111 and a horizontal frame 112 connecting the four columns 111.

[0054] Please continue to refer to Figure 1 , there are multiple horizontal frames 112 of the bracket 110, and they are arranged at intervals along the axial direction of the columns 111. Therefore, the multiple horizontal frames 112 can divide the whole bracket 110 into multiple layers of structures. Each layer of the horizontal frame 112 can be used to place battery cells and perform grading processing, increasing the number of battery cells for grading processing.

[0055] Please refer to Figure 4 , each horizontal frame 112 includes four interconnected crossbars 1121, so that the horizontal frame 112 presents a rectangular structure surrounded by the four crossbars 1121.

[0056] In this embodiment, each column 111 is a quadrangular prism, and continuous grooves 150 parallel to the axial direction of the column 111 are provided on the four surfaces along the axial direction of the column 111 as positioning parts. Each of the four crossbars 1121 in each horizontal frame 112 is a quadrangular prism, and each crossbar 1121 is provided with two grooves 150 parallel to the axial direction of the crossbar 1121 as positioning parts, and these two grooves 150 are located on two mutually parallel surfaces of the crossbar 1121.

[0057] Please refer to Figure 5, there are multiple connecting components 120, and a connecting component 120 is provided at the connection of each cross column 1121 and the vertical column 111. Each connecting component 120 includes a right-angled connecting piece 121 and a threaded connecting piece 122. Through holes are provided on both faces of the right-angled connecting piece 121 that are perpendicular to each other. The threaded connecting piece 122 passes through the through hole and is fixed in cooperation with the positioning portion. When it is necessary to adjust the distance between adjacent two layers of horizontal frames 112, the threaded connecting piece 122 on the vertical column 111 can be loosened. At this time, the right-angled connecting piece 121 can move up and down in the groove 150 of the vertical column 111, thereby driving the cross column 1121 to move, realizing the adjustment of the distance between adjacent two layers of horizontal frames 112. When the right-angled connecting piece 121 moves to a suitable position, the threaded connecting piece 122 is tightened again and accommodated in the positioning portion, completing the adjustment of the layer height of the cell grading device 100.

[0058] Since the structures of adjacent two layers of horizontal frames 112 can be adjusted according to the cell models to be graded, when multiple horizontal frames 112 are arranged at intervals along the axial direction of the vertical column 111, they can be arranged at uniform intervals or not at uniform intervals, as long as they can accommodate the cells to be graded.

[0059] In addition, in order to ensure the stable installation of the cells, a cell placement position is provided on each horizontal frame 112 for accommodating the cells.

[0060] Please refer to Figure 1 and Figure 3 , in this embodiment, the cell placement position is composed of a laminate 141 and a grid frame 142. The grid frame 142 is fixed inside the horizontal frame 112, and the laminate 141 is fixed on the surface of the horizontal frame 112.

[0061] Specifically, since there are two parallel grooves 150 on the cross column 1121 of the horizontal frame 112 of each layer in this embodiment, therefore, one of the grooves 150 can be connected to the grid frame 142 through the connecting component 120, that is, the grid frame 142 also has a groove 150 or a positioning portion. Through the cooperation of the right-angled connecting piece 121 and the threaded connecting piece 122, the grid frame 142 is locked inside the horizontal frame 112; then the laminate 141 is fixed on the surfaces of the horizontal frame 112 and the grid frame 142 by welding or screws to form a cell placement position. The grid frame 142 provides support in the middle of the horizontal frame 112, and the laminate 141 is made of a static-free epoxy resin material, providing a stable and safe position for the placement of the cells.

[0062] Please refer to Figure 1 and Figure 5, Further, another groove 150 on the crossbar 1121 of the horizontal frame 112 of each layer that is not connected to the grid frame 142 can be used to install the clip fixing seat 130. The clip fixing seat 130 is also installed on the crossbar 1121 by using the connecting component 120. In this embodiment, only one battery cell is placed on each layer. Therefore, each horizontal frame 112 has only one first crossbar 1122. The first crossbar 1122 is the crossbar 1121 with a longer length in the horizontal frame 112, and it is connected to two clip fixing seats 130 through the connecting component 120. The clip fixing seat 130 is provided with a groove 150 perpendicular to the axial direction of the first crossbar 1122. Therefore, the right-angled connecting piece 121 is accommodated in the grooves 150 of the clip fixing seat 130 and the first crossbar 1122, and then through the cooperation of the threaded connecting piece 122, the clip fixing seat 130 is fixed on the first crossbar 1122.

[0063] When it is necessary to adjust the distance between two adjacent clip fixing seats 130, the threaded connecting piece 122 connected to the first crossbar 1122 can be loosened. At this time, the right-angled connecting piece 121 can move left and right in the groove 150 of the first crossbar 1122, thereby driving the clip fixing seat 130 to move, realizing the adjustment of the distance between two adjacent clip fixing seats 130. When the right-angled connecting piece 121 moves to a suitable position, the threaded connecting piece 122 is tightened again and accommodated in the positioning part, completing the adjustment of the distance between the two clip fixing seats 130 to adapt to the grading requirements of battery cells of different models.

[0064] In this embodiment, in order to facilitate the placement of the clips and the cable wires, the clip fixing seat 130 extends out of the bracket 110, and in order to facilitate the connection of the cable wires, the clip fixing seats 130 of each layer are located on the same side.

[0065] In this embodiment, the clip fixing seat 130 is a plate-like structure that is the same size as or slightly larger than the clip. Two through fixing holes 131 for fixing the clip are opened thereon. When the clip is fixed on the clip fixing seat 130, a threaded connecting piece, such as a screw, a bolt or a nut, can be used to pass the threaded connecting piece through the counterbore of the clip and then fix it in the fixing hole 131 of the clip fixing seat 130.

[0066] Please continue to refer to Figure 1 , In this embodiment, in order to facilitate the movement of the battery cell grading device 100, a bottom plate 160 and a sliding part 170 are further included. The bottom plate 160 is fixed on the horizontal frame 112 at the end face of the bracket 110, the sliding part 170 is installed on the bottom plate 160, and the sliding part 170 protrudes from one end of the bottom plate 160 away from the bracket 110. The sliding part 170 contacts the ground, and the displacement of the battery cell grading device 100 is realized during the sliding on the ground.

[0067] Preferably, the sliding part 170 is a roller, and the number of the sliding parts 170 is four, which are evenly spaced around the bottom plate 160.

[0068] Furthermore, the grading device 100 for the above-mentioned battery cells provided in this embodiment is used for grading the battery cells of the ABT110999569 model. Among them, the materials of the overall bracket 110 and the grid frame 142 are both aluminum profiles, and the materials of the clip fixing seat 130 and the laminate 141 are epoxy resin plates with antistatic effects to prevent the battery cells from short-circuiting. The distance between two adjacent clip fixing seats 130 in each horizontal frame 112 is 150 mm.

[0069] In summary, since the grading process of the battery cells requires charging the battery cells first and then discharging them, one of the structures for realizing the charging and discharging of the battery cells is the clip. Generally, one end of the clip is connected to the tab of the battery cell, and the other end is connected to the cable. In this way, the charging and discharging of the battery cells can be realized.

[0070] For the current battery cell grading device, especially for the large battery cells of the ABT110999569 model, its grading rack has no structure for fixing the clips, and the cable is long and heavy, which easily causes the clips to fall to the ground due to the dragging effect of the cable, resulting in damage to the clips and affecting the normal progress of the battery cell grading process. The structure of this embodiment is connected with the clip fixing seat 130 movably on each horizontal frame 112. When the battery cell grading process is not required, the clips can also be fixed on the clip fixing seat 130, avoiding the problem of damage to the clips caused by the dragging of the cable; at the same time, since the clip fixing seat 130 is correspondingly arranged with the battery cell placement position on the horizontal frame 112, the clips are fixed on the clip fixing seat 130, and the cable also follows the position of the clips. Therefore, when grading the battery cells, the tab of the battery cell can be directly connected to the clip, saving the laborious process of dragging the cable back and forth.

[0071] In addition, by designing the cooperation relationship of the positioning parts between the connecting component 120 and the upright column 111, the cross column 1121 and the clip fixing seat 130, the adjustment of the distance between two adjacent horizontal frames 112 is realized, which can be applicable to the grading of battery cells with different heights; at the same time, the adjustment of the distance between two adjacent clip fixing seats 130 on each layer is also realized, adapting to the grading of battery cells with different tab spacings of different models, and its versatility is stronger, not only applicable to the existing battery cell grading, for example, but also applicable to the grading process of other new large battery cells.

[0072] Furthermore, the bracket 110 made of aluminum profile is more stable, and at the same time, the epoxy resin laminate 141 and the clip fixing seat 130 with antistatic ability are configured, reducing the risk of short-circuiting during the battery cell grading process.

[0073] The present utility model provides a grading and capacitance testing device 100 for battery cells. By providing a bracket 110, the multiple layers of horizontal frames 112 therein can be used to place battery cells, so that multiple battery cells can be placed for grading and capacitance testing. A clip fixing seat 130 is installed on one side of the battery cell placement position on each horizontal frame 112. Therefore, when the battery cell is placed in the battery cell placement position on the horizontal frame 112, the tab can face the direction of the clip fixing seat 130. The clip fixing seat 130 is used to fix the clip, so that the clip can be stably placed and will not fall off when not in use. When the clip is in use, it can directly clamp the tab of the battery cell for charge and discharge testing. The design of the clip fixing seat 130 makes the grading and capacitance testing operation of the battery cell safer and more convenient, and at the same time ensures its service life and will not be accidentally damaged. In addition, through the design of the connection component 120 and the positioning part, the distance between the clip fixing seats 130 and the distance between adjacent two layers of horizontal frames 112 can be adjusted according to the sizes of different battery cells. Therefore, more different models of battery cells can be accommodated, making the grading and capacitance testing device 100 for battery cells more versatile.

[0074] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cell capacity distribution device, characterized in that: It comprises a bracket, a connecting assembly and a clip fixing seat, wherein the bracket comprises a plurality of columns and a horizontal frame connecting the plurality of columns, the horizontal frames are multiple and are arranged at intervals along the axial direction of the columns, and the connection between the horizontal frames and the columns can be selectively movably connected through the connecting assembly; Each of the horizontal frames is provided with a battery cell placement position, and a non-zero even number of the clip fixing seats are connected to the horizontal frame on one side of the battery cell placement position, and the horizontal frame and the clip fixing seat are also selectively movably connected through the connecting assembly; The columns, horizontal frames and clamp fixing seats are all provided with positioning parts. Each of the connecting components includes a right-angle connecting piece and a threaded connecting piece. Through holes are provided on two surfaces at right angles to each other. The threaded connecting piece passes through the through holes and is fixed in cooperation with the positioning part.

2. The cell capacity distribution device according to claim 1, characterized in that: Each of the horizontal frames includes any one of a plurality of interconnected horizontal columns or a circular ring.

3. The cell capacity distribution device according to claim 2, characterized in that: Each of the horizontal frames is surrounded by a plurality of mutually connected transverse columns, and the transverse column used for connecting with the clip fixing seat is the first transverse column.

4. The cell capacity distribution device according to claim 1 or 3, characterized in that: The positioning portion is a groove or a hole.

5. The cell capacity division device according to claim 3, characterized in that: The positioning portion is a groove, the column is provided with at least two grooves that are parallel to the axis of the column, the first cross column of the horizontal frame is provided with at least two grooves that are parallel to the axis of the first cross column, the remaining cross columns of the horizontal frame are provided with at least one groove parallel to the axis thereof, and the clip fixing seat is provided with a groove that is perpendicular to the axis of the first cross column.

6. The cell capacity distribution device according to claim 1, characterized in that: The battery cell placement position includes a layer plate and / or a grid frame, the layer plate is fixed to the surface of the horizontal frame, and the grid frame is fixed to the inside of the horizontal frame.

7. The cell capacity division device according to claim 1, characterized in that: The clip fixing seat extends out of the bracket.

8. The cell capacity division device according to claim 1, characterized in that: The shape of the support includes any one of a cylinder, a prism, a frustum or a truncated pyramid.

9. The cell capacity division device according to claim 8, characterized in that: The support is in the shape of a prism, and the number of the vertical columns is equal to the number of the horizontal columns of the horizontal frame.

10. The battery cell capacity division device according to claim 1, characterized in that: It also includes a bottom plate and a sliding part. The bottom plate is fixed on a horizontal frame on the end surface of the bracket. The sliding part is installed on the bottom plate, and the sliding part protrudes from one end of the bottom plate away from the bracket.

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