Battery testing device

Abstract

The utility model belongs to battery technical field provides a kind of battery testing device, including containing piece, wire, first plugging piece and second plugging piece, containing piece is provided with containing cavity, the cavity wall of containing cavity is provided with wire slot;Wire, the part in containing cavity is fixed and guided by wire slot, the part outside containing cavity is used to connect test equipment;First plugging piece is plugged in the opening of one end of containing cavity, and wire hole is provided on first plugging piece;Second plugging piece is plugged in the opening of another end of containing cavity, and pressure-increasing hole is provided on second plugging piece.Because containing piece, first plugging piece and second plugging piece form airtight container, therefore when the medium in containing cavity is pressurized through pressure-increasing hole, pressure can be evenly transmitted to each direction in containing cavity, so that battery cell receives uniform pressure, realizes the densification of battery cell;In addition, by setting wire slot, wire arrangement can be facilitated, and wire winding is avoided.

Description

Technical Field

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

[0002] Due to the characteristics of solid-state batteries, their volume expansion during cycling requires external high pressure to restrain it. Related technologies use clamps to pressurize the cells, but to meet the pressure requirements of the cells or battery packs (typically 2-60 MPa), the clamps would be very large and heavy, hindering subsequent handling and testing. Furthermore, clamps generally include two clamping plates, typically distributed along the Z-axis on both sides of the cell or battery pack. This means the clamps can only apply pressure along the Z-axis, causing the cells or battery pack to be compressed and deformed in both the X and Y directions under high pressure, resulting in uneven stress and preventing the achievement of densification. Utility Model Content

[0003] The purpose of this invention is to provide a battery testing device that can subject battery cells or battery packs to uniform pressure, thereby achieving densification of battery cells or battery packs. In addition, it facilitates the arrangement of wires and avoids wire tangling.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Battery testing equipment, including:

[0006] The receiving component is provided with a receiving cavity for placing a battery cell or battery pack, and the cavity wall of the receiving cavity is provided with wire grooves;

[0007] A wire, a portion of which is located inside the receiving cavity and another portion of which is located outside the receiving cavity, the portion of which is located inside the receiving cavity is fixed and guided by the wire groove to connect to the battery cell or the battery pack, and the portion of which is located outside the receiving cavity is used to connect to the testing equipment;

[0008] A first sealing element is provided at one end of the opening of the receiving cavity. The first sealing element is provided with a wire hole for the wire to pass through.

[0009] The second sealing element is provided at the other end opening of the receiving cavity. The second sealing element is provided with a pressure boosting hole, which is used to introduce the medium into the receiving cavity.

[0010] The beneficial effects of this utility model are:

[0011] The battery testing device provided by this utility model, because the receiving component, the first sealing component, and the second sealing component form a sealed container, can evenly transmit pressure to all directions within the receiving cavity when the medium inside the receiving cavity is pressurized through the pressurization hole, so that the battery cell or battery pack is subjected to uniform pressure, effectively solving the problem of uneven force on the battery cell or battery pack in the prior art, and realizing the densification of the battery cell or battery pack; in addition, by setting the wire groove on the inner wall of the receiving cavity, the wire can be arranged conveniently and the wire can be prevented from tangling. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a battery testing device provided in one embodiment of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of a battery testing device provided in another embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure of the first sealing component involved in the embodiment of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the first sealing component involved in the embodiment of this utility model;

[0016] Figure 5 This is a front view of the first sealing component involved in the embodiments of this utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the second sealing component involved in the embodiments of this utility model;

[0018] Figure 7 This is a schematic diagram of the structure of the third sealing component involved in the embodiments of this utility model;

[0019] Figure 8 This is a top view of the material frame involved in the embodiments of this utility model;

[0020] Figure 9 This is a bottom view of the material frame involved in the embodiments of this utility model;

[0021] Figure 10 This is a schematic diagram of the fixed frame involved in the embodiments of this utility model.

[0022] In the picture:

[0023] 100, battery cell; 200, conductor; 201, main line; 202, branch line;

[0024] 10. Receiving component; 11. Receiving cavity; 20. First sealing component; 21. Wire hole; 30. Second sealing component; 31. Pressure boosting hole; 41. First flexible seal; 42. First rigid seal; 51. Second flexible seal; 52. Second rigid seal; 61. Third flexible seal; 62. Third rigid seal; 70. Material frame; 71. Fixing position; 72. Roller; 80. Fixing frame; 81. First fixing plate; 82. Second fixing plate; 83. Connecting rod; 84. Nut. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0029] like Figures 1 to 10As shown, this utility model provides a battery testing device, including a receiving component 10, a wire 200, a first sealing component 20, and a second sealing component 30. The receiving component 10 can be... Figure 1 The cylindrical shape shown can also be Figure 2 The rectangular prism shape shown can be any other shape, and is not limited to this. The receiving member 10 is provided with a receiving cavity 11, which is used to place the battery cell 100 or battery pack. The battery cell 100 is a solid-state battery cell or module. The cavity wall of the receiving cavity 11 is provided with a wire groove. A portion of the wire 200 is located inside the receiving cavity 11, and another portion is located outside the receiving cavity 11. The portion of the wire 200 inside the receiving cavity 11 is fixed and guided by the wire groove to connect to the battery cell 100 or battery pack. The portion of the wire 200 outside the receiving cavity 11 is used to connect to testing equipment. A first sealing member 20 seals one end opening of the receiving cavity 11. The first sealing member 20 is provided with a wire hole 21 for the wire 200 to pass through. A second sealing member 30 seals the other end opening of the receiving cavity 11. The second sealing member 30 is provided with a pressure-boosting hole 31 for introducing a medium into the receiving cavity 11. Since the receiving component 10, the first sealing component 20 and the second sealing component 30 form a sealed container, when the medium in the receiving cavity 11 is pressurized through the pressurization hole 31 (which can be pressurized to 2-100MPa), the pressure can be evenly transmitted to all directions in the receiving cavity 11, so that the cell 100 or battery pack is subjected to uniform pressure. This effectively solves the problem of uneven force on the cell 100 or battery pack in the prior art and realizes the densification of the cell 100 or battery pack.

[0030] By providing a wire groove on the inner wall of the receiving cavity 11, the wire 200 can be easily arranged and tangled. In some embodiments, the depth of the wire groove is 1-20mm. If the depth of the wire groove is too large, it will weaken the strength of the receiving member 10, causing the receiving member 10 to be prone to deformation under high pressure; if the depth of the wire groove is too small, it will not be able to effectively fix the wire 200. By setting the depth of the wire groove to 1-20mm, both the strength of the receiving member 10 and the wire 200 can be effectively fixed. In some embodiments, the wire groove includes a groove body and a groove opening, the width of the groove opening is smaller than the width of the groove body, that is, the wire groove has a constricted structure, which can limit and fix the wire 200 and prevent the wire 200 from coming out of the wire groove.

[0031] In some embodiments, a first sealing component is provided within the wire hole 21, the first sealing component being used to seal the gap between the wire hole 21 and the wire 200. (Refer to...) Figure 4 and Figure 5The first sealing assembly includes a first flexible seal 41 and two first rigid seals 42. Along the axial direction of the wire hole 21, the first flexible seal 41 is located between the two first rigid seals 42. The two first rigid seals 42 can clamp and compress the first flexible seal 41 to enhance the sealing effect. Flexible seals are prone to deformation under high pressure, while rigid seals, although less prone to deformation, are easily worn. Combining flexible and rigid seals effectively solves the defects of using either flexible or rigid seals alone. In some embodiments, along the axial direction of the wire hole 21, the inner end face of the first rigid seal 42 located outside the first flexible seal 41 has a groove, and a portion of the first flexible seal 41 is located within the groove to position the first flexible seal 41. In some embodiments, along the axial direction of the wire hole 21, the outer end of the first rigid seal 42 located outside the first flexible seal 41 is bolt-shaped to facilitate tightening with a tool, so that it, together with the first rigid seal 42 located inside the first flexible seal 41, compresses the first flexible seal 41.

[0032] In some embodiments, a second sealing assembly is provided between the outer peripheral surface of the first sealing member 20 and the inner peripheral surface of the receiving cavity 11, the second sealing assembly being used to seal the gap between the first sealing member 20 and the receiving cavity 11. (Refer to...) Figure 6 The second sealing assembly includes a second flexible seal 51 and a second rigid seal 52. Along the axial direction of the receiving cavity 11, the second flexible seal 51 is located inside the second rigid seal 52. By using the flexible seal and the rigid seal in combination, the shortcomings of using either the flexible seal or the rigid seal alone can be effectively addressed.

[0033] In some embodiments, a third sealing assembly is provided between the outer peripheral surface of the second sealing member 30 and the inner peripheral surface of the receiving cavity 11, the third sealing assembly being used to seal the gap between the second sealing member 30 and the receiving cavity 11. (Refer to...) Figure 7 The third sealing assembly includes a third flexible seal 61 and a third rigid seal 62. Along the axial direction of the receiving cavity 11, the third flexible seal 61 is located inside the third rigid seal 62. By combining the flexible seal and the rigid seal, the defects of using the flexible seal or the rigid seal alone can be effectively solved.

[0034] Optionally, the first flexible seal 41 and / or the second flexible seal 51 and / or the third flexible seal 61 can be rubber seals or silicone seals, etc. The first rigid seal 42 and / or the second rigid seal 52 and / or the third rigid seal 62 can be nylon seals or polytetrafluoroethylene seals, etc.

[0035] Reference Figure 8The battery testing device provided by this utility model also includes a material frame 70, which is disposed within the receiving cavity 11, and the battery cell 100 or battery pack is fixed within the material frame 70. By setting the material frame 70, the battery cell 100 or battery pack can be fixed, preventing the battery cell 100 or battery pack from flipping within the receiving cavity 11. In some embodiments, the material frame 70 is provided with multiple fixing positions 71, which are used to fix multiple battery cells 100 respectively. The wire 200 includes a main bus 201 and multiple branch lines 202 connected to the main bus 201. The multiple branch lines 202 are electrically connected to multiple battery cells 100 respectively, and the wire groove is used to fix and guide the main bus 201. The material frame 70 can fix multiple battery cells 100 simultaneously, thereby applying pressure to multiple battery cells 100 at the same time, improving the efficiency of high-voltage testing of the battery cells 100; in addition, by setting the wire 200 to include a main bus 201 and multiple branch lines 202, the wire 200 can be kept simple and neat. In some embodiments, the material frame 70 is slidably engaged with the receiving member 10, allowing the material frame 70 to slide in and out of the receiving cavity 11 through its opening. The material frame 70 can be moved in and out of the receiving cavity 11 by pushing or pulling, making operation convenient and effortless. Optionally, refer to... Figure 9 The material frame 70 is provided with rollers 72, and the material frame 70 slides with the receiving part 10 through the rollers 72; or the cavity wall of the receiving cavity 11 is provided with a sliding groove, and the material frame 70 is provided with a slider, which slides with the sliding groove.

[0036] Reference Figure 10 The battery testing device provided by this utility model also includes a fixed frame 80, a receiving member 10 disposed within the fixed frame 80, and a first sealing member 20 and a second sealing member 30 fixed by the fixed frame 80. By fixing the first sealing member 20 and the second sealing member 30 with the fixed frame 80, it is possible to prevent the first sealing member 20 and the second sealing member 30 from detaching from the receiving member 10 when the medium in the receiving cavity 11 is pressurized.

[0037] In some embodiments, the fixing frame 80 includes a first fixing plate 81, a second fixing plate 82, and a connecting rod 83. The first fixing plate 81 abuts against the first sealing member 20, and the second fixing plate 82 abuts against the second sealing member 30. The connecting rod 83 connects the first fixing plate 81 and the second fixing plate 82, and the connecting rod 83 is detachably connected to at least one of the first fixing plate 81 and the second fixing plate 82 to facilitate the assembly of the fixing frame 80. In some embodiments, at least one of the first fixing plate 81 and the second fixing plate 82 is provided with a connecting hole, and the connecting rod 83 passes through the connecting hole and is threadedly connected to a nut 84. Optionally, the connecting rod 83 may be welded to one of the first fixing plate 81 and the second fixing plate 82, and the other may be provided with a connecting hole. When assembling the fixed frame 80, firstly, one of the first fixed plate 81 and the second fixed plate 82 that is fixedly connected to the connecting rod 83 abuts against the corresponding sealing member. Then, the connecting rod 83 passes through the connecting hole on the other plate. Finally, the nut 84 is connected to the part of the connecting rod 83 that protrudes from the connecting hole, and the nut 84 is tightened. Optionally, refer to... Figure 10 Alternatively, both the first fixing plate 81 and the second fixing plate 82 can be provided with connecting holes, and the connecting rod 83 can pass through the connecting holes on the first fixing plate 81 and the second fixing plate 82 respectively and be threadedly connected to the nut 84. When assembling the fixing frame 80, firstly, the connecting rod 83 is passed through the connecting hole on the first fixing plate 81, then the nut 84 is connected to the part of the connecting rod 83 that passes through the connecting hole on the first fixing plate 81, then the first fixing plate 81 abuts against the first sealing member 20, then the connecting rod 83 is passed through the connecting hole on the second fixing plate 82, and finally the nut 84 is connected to the part of the connecting rod 83 that passes through the connecting hole on the second fixing plate 82, and the nut 84 is tightened.

[0038] In some embodiments, the medium can be a liquid or a gaseous medium, and regardless of whether it is a liquid or a gaseous medium, it must be non-conductive. The working principle of an isostatic press is based on Pascal's law, that is, in a liquid or gaseous medium within a closed container, pressure can be uniformly transmitted in all directions. Based on this principle, the isostatic press can apply uniform pressure to an object, thereby achieving material densification. The working process of an isostatic press includes: medium injection, i.e., the liquid or gaseous medium is injected into a high-pressure container through a pressure pump; uniform pressurization, due to the incompressibility of the liquid, the pressure is uniformly transmitted in all directions within the container, subjecting the processed object to uniform pressure; densification, under high pressure, the voids inside the object are eliminated, the material density increases, and the physical properties are improved. The battery testing device provided by this utility model is based on the above principle.

[0039] The battery testing device provided by this utility model also includes a pressurizing mechanism, which can pressurize the medium in the receiving cavity 11 through the pressurizing port 31. Optionally, when the medium is a liquid medium, the pressurizing mechanism can be a hydraulic cylinder; when the medium is a gaseous medium, the pressurizing mechanism can be a pneumatic cylinder.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery testing device, characterized in that, include: The receiving component (10) is provided with a receiving cavity (11), the receiving cavity (11) is used to place the battery cell (100) or battery pack, and the cavity wall of the receiving cavity (11) is provided with wire grooves; A wire (200), a portion of which is located inside the receiving cavity (11) and another portion of which is located outside the receiving cavity (11), the portion of which is located inside the receiving cavity (11) is fixed and guided by the wire groove to connect to the cell (100) or the battery pack, and the portion of which is located outside the receiving cavity (11) is used to connect to the test equipment; The first sealing member (20) is sealed at one end opening of the receiving cavity (11). The first sealing member (20) is provided with a wire hole (21) for the wire (200) to pass through. The second sealing element (30) is sealed at the other end opening of the receiving cavity (11). The second sealing element (30) is provided with a pressure boosting hole (31), which is used to introduce the medium into the receiving cavity (11).

2. The battery testing apparatus according to claim 1, characterized in that, The depth of the wire groove is 1-20mm.

3. The battery testing apparatus according to claim 1, characterized in that, The wire groove includes a groove body and a groove opening, the width of which is smaller than the width of the groove body.

4. The battery testing apparatus according to claim 1, characterized in that, A first sealing component is provided inside the wire hole (21), which is used to seal the gap between the wire hole (21) and the wire (200).

5. The battery testing apparatus according to claim 4, characterized in that, The first sealing assembly includes a first flexible seal (41) and two first rigid seals (42), with the first flexible seal (41) located between the two first rigid seals (42) along the axial direction of the wire hole (21).

6. The battery testing apparatus according to claim 1, characterized in that, A second sealing assembly is provided between the outer peripheral surface of the first sealing member (20) and the inner peripheral surface of the receiving cavity (11). The second sealing assembly includes a second flexible seal (51) and a second rigid seal (52). Along the axial direction of the receiving cavity (11), the second flexible seal (51) is located inside the second rigid seal (52).

7. The battery testing apparatus according to claim 1, characterized in that, A third sealing assembly is provided between the outer peripheral surface of the second sealing member (30) and the inner peripheral surface of the receiving cavity (11). The third sealing assembly includes a third flexible seal (61) and a third rigid seal (62). Along the axial direction of the receiving cavity (11), the third flexible seal (61) is located inside the third rigid seal (62).

8. The battery testing apparatus according to any one of claims 1-7, characterized in that, The battery testing device also includes a material frame (70), which is disposed in the receiving cavity (11), and the battery cell (100) or the battery pack is fixed in the material frame (70).

9. The battery testing apparatus according to claim 8, characterized in that, The material frame (70) is provided with multiple fixing positions (71), which are used to fix multiple battery cells (100) respectively; the wire (200) includes a main bus (201) and multiple branch lines (202) connected to the main bus (201), which are electrically connected to the multiple battery cells (100) respectively; the wire groove is used to fix and guide the main bus (201).

10. The battery testing apparatus according to claim 8, characterized in that, The material frame (70) is slidably engaged with the receiving member (10), and the material frame (70) can slide in and out of the receiving cavity (11) from the opening of the receiving cavity (11).

11. The battery testing apparatus according to any one of claims 1-7, characterized in that, The battery testing device further includes a fixed frame (80), the receiving member (10) is disposed within the fixed frame (80), and the first sealing member (20) and the second sealing member (30) are fixed by the fixed frame (80).

12. The battery testing apparatus according to claim 11, characterized in that, The fixed frame (80) includes a first fixed plate (81), a second fixed plate (82), and a connecting rod (83). The first fixed plate (81) abuts against the first sealing member (20), the second fixed plate (82) abuts against the second sealing member (30), and the connecting rod (83) connects the first fixed plate (81) and the second fixed plate (82). The connecting rod (83) is detachably connected to at least one of the first fixed plate (81) and the second fixed plate (82).

13. The battery testing apparatus according to any one of claims 1-7, characterized in that, The battery testing device also includes a pressurization mechanism, which can pressurize the medium in the receiving cavity (11) through the pressurization hole (31).

14. The battery testing apparatus according to any one of claims 1-7, characterized in that, The receiving element (10) is cylindrical or square.

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