Test fixture and battery insulation test system
By designing test fixtures for rounded U-shaped plates and elastic components, the perfect fit and contact of the battery cell is achieved, solving the problem of blue film damage detection of battery cell edges, improving the accuracy of tests and reducing quality risks.
Patent Information
- Application Number
- CN202420893422.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-28
AI Technical Summary
Existing lithium battery insulation testing methods cannot effectively detect the damage of the rounded blue film on the edge of the battery cell, resulting in quality risks.
A test fixture is designed, including a first U-shaped plate, a second U-shaped plate and an elastic assembly. The curved plate parts of the two U-shaped plates are arranged as rounded corners, and the perfect fit with the four sides of the battery cell is achieved through the elastic assembly. Contact and provide conductive layers in the fixture for electrical insulation testing.
It improves the accuracy of cell insulation testing, reduces the risk of blue film breakage and leakage detection, and facilitates the placement and protection of the cell through elastic components.
Smart Images
Figure CN222353960U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of testing tooling, and in particular relates to a testing fixture and a battery insulation testing system. Background Art
[0002] In the insulation test of lithium batteries, it is necessary to check whether the blue film on the surface of the battery cell is damaged.
[0003] At present, the market uses marble slabs to pressurize the battery cells for insulation testing. Conductive insulating cloth is pasted on the surface of the marble slab, and the entire large surface is powered for insulation testing. However, the edges of the battery cells are rounded, and the marble slab in contact with the battery cells is flat, which will cause the rounded corners of the battery cells to be unable to contact the marble slab, resulting in the blue film on the edge of the battery cells being damaged and unable to be detected, posing a quality risk.
[0004] Therefore, it is urgent to develop a new test fixture and a battery insulation test system to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a test fixture and a battery insulation test system.
[0006] In order to solve the above technical problems, the utility model provides a test fixture, which includes: a first U-shaped plate, a second U-shaped plate and an elastic component; the two first bent plate parts on the first U-shaped plate are respectively chamfered with the first substrate part to form two first chamfered edges; the two second bent plate parts on the second U-shaped plate are respectively chamfered with the second substrate part to form two second chamfered edges; the first U-shaped plate and the second U-shaped plate are respectively connected to the elastic component; the space between the first U-shaped plate and the second U-shaped plate is suitable for placing a workpiece, and the first U-shaped plate is suitable for squeezing the elastic component to move toward the second U-shaped plate until the first U-shaped plate and the second U-shaped plate cover the workpiece, and the two first chamfered edges and the two second chamfered edges are respectively fitted with the four edges on the workpiece.
[0007] Specifically, the elastic component includes: at least two elastic units; the first bent plate portion is movably connected to the corresponding second bent plate portion through at least one elastic unit, so that the first U-shaped plate and the second U-shaped plate are moved closer to or farther away from each other.
[0008] Specifically, the elastic unit comprises: a guide rod and an elastic member; the guide rod is connected to the first bent plate portion and the second bent plate portion respectively, and the elastic member is sleeved on the guide rod.
[0009] Specifically, the first curved plate portion is provided with a first moving groove; one end of the guide rod is fixed to the second curved plate portion, and the other end of the guide rod extends into the first moving groove.
[0010] Specifically, the second curved plate portion is provided with a second movable groove; one end of the guide rod is fixed to the first curved plate portion, and the other end of the guide rod extends into the second movable groove.
[0011] Specifically, the first curved plate portion is provided with a first moving groove, and the second curved plate portion is provided with a second moving groove; one end of the guide rod extends into the first moving groove, and the other end of the guide rod extends into the second moving groove.
[0012] Specifically, a conductive layer is provided on the surface of the first U-shaped plate, the surface of the second U-shaped plate, and the surface of the elastic component.
[0013] Specifically, the test fixture further includes: a downward pressing driving member; the downward pressing driving member is connected to the first U-shaped plate.
[0014] On the other hand, the utility model provides a battery insulation testing system, which includes: an insulation testing device and a test fixture as described above; wherein the insulation testing device is electrically connected to the test fixture; the insulation testing device energizes the test fixture to perform an insulation test on the battery clamped in the test fixture.
[0015] Specifically, the insulation testing equipment adopts an insulation tester.
[0016] The beneficial effect of the utility model is that the utility model clamps the battery cell by arranging the first U-shaped plate and the second U-shaped plate, and the two first chamfered edges and the two second chamfered edges are fitted with the four edges on the battery cell to achieve perfect fitting contact with the battery cell, thereby improving the accuracy of the battery cell insulation test and reducing the risk of missed detection of blue film damage on the battery cell. At the same time, the elastic component is arranged to facilitate the insertion of the battery cell and protect the battery cell.
[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1It is a structural diagram of the test fixture of the utility model;
[0021] Figure 2 It is a structural diagram of the test fixture of the utility model installed on the downward pressure driving member;
[0022] Figure 3 It is a structural diagram of a first optional implementation mode of the elastic unit of the utility model;
[0023] Figure 4 It is a structural diagram of a second optional implementation mode of the elastic unit of the utility model;
[0024] Figure 5 It is a structural diagram of a third optional implementation mode of the elastic unit of the utility model.
[0025] In the figure:
[0026] 1. first U-shaped plate; 11. first bent plate portion; 111. first moving groove; 12. first base plate portion; 13. first chamfered edge;
[0027] 2. second U-shaped plate; 21. second bent plate portion; 211. second movable groove; 22. second base plate portion; 23. second chamfered edge;
[0028] 3. elastic component; 31. guide rod; 32. elastic member;
[0029] 4. Press down the drive element. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] Embodiment 1, in this embodiment, as Figure 1As shown, the present embodiment provides a test fixture, which includes: a first U-shaped plate 1, a second U-shaped plate 2 and an elastic component 3; wherein the two first bent plate portions 11 on the first U-shaped plate 1 are respectively chamfered with the first substrate portion 12 to form two first chamfered edges 13; the two second bent plate portions 21 on the second U-shaped plate 2 are respectively chamfered with the second substrate portion 22 to form two second chamfered edges 23; the first U-shaped plate 1 and the second U-shaped plate 2 are respectively connected to the elastic component 3; the space between the first U-shaped plate 1 and the second U-shaped plate 2 is suitable for placing a workpiece, and the first U-shaped plate 1 is suitable for squeezing the elastic component 3 to move toward the second U-shaped plate 2 until the first U-shaped plate 1 and the second U-shaped plate 2 cover the workpiece, and the two first chamfered edges 13 and the two second chamfered edges 23 are respectively fitted with the four edges on the workpiece.
[0032] Specifically, the workpiece is a battery cell, a blue film is attached to the surface of the battery cell, and four edges of the battery cell are chamfered.
[0033] In this embodiment, a first U-shaped plate 1 and a second U-shaped plate 2 are provided to clamp the battery cell, and the two first chamfered edges 13 and the two second chamfered edges 23 are fitted with the four edges on the battery cell to achieve perfect fitting contact with the battery cell, thereby improving the accuracy of the battery cell insulation test and reducing the risk of missed detection of blue film damage on the battery cell. At the same time, the elastic component 3 is provided to facilitate the placement of the battery cell and protect the battery cell.
[0034] In order to facilitate the placement of the battery cell between the first U-shaped plate 1 and the second U-shaped plate 2, the elastic component 3 includes: at least two elastic units; the first bent plate portion 11 is movably connected to the corresponding second bent plate portion 21 through at least one elastic unit to make the first U-shaped plate 1 and the second U-shaped plate 2 approach or move away.
[0035] In this embodiment, four elastic units are provided, and two elastic units are provided on each side of the first U-shaped plate 1, respectively, which can ensure that the first U-shaped plate 1 is pressed horizontally toward the second U-shaped plate 2, thereby preventing the first U-shaped plate 1 from tilting during the pressing process, thereby ensuring that the first U-shaped plate 1 and the second U-shaped plate 2 are in perfect fit and contact with the battery cell.
[0036] In order to prevent the first U-shaped plate 1 and the second U-shaped plate 2 from directly contacting the battery core, the elastic unit includes: a guide rod 31 and an elastic member 32; the guide rod 31 is respectively connected to the first bent plate portion 11 and the second bent plate portion 21, and the elastic member 32 is sleeved on the guide rod 31.
[0037] Specifically, the guide rod 31 guides the first U-shaped plate 1 to move linearly, and the elastic member 32 acts as a buffer. During the pressing process, as the elastic member 32 is compressed, the pressing pressure will slowly increase, thereby achieving the effect of protecting the battery cell.
[0038] Specifically, the elastic member 32 may be a spring.
[0039] As an optional implementation of the elastic unit, Figure 3 As shown, the first curved plate portion 11 defines a first moving groove 111 ; one end of the guide rod 31 is fixed to the second curved plate portion 21 , and the other end of the guide rod 31 extends into the first moving groove 111 .
[0040] Specifically, by providing the first moving groove 111 , the guide rod 31 can be retracted into the first moving groove 111 , and finally the first U-shaped plate 1 and the second U-shaped plate 2 are docked.
[0041] As another optional implementation of the elastic unit, Figure 4 As shown, the second curved plate portion 21 defines a second moving groove 211 ; one end of the guide rod 31 is fixed to the first curved plate portion 11 , and the other end of the guide rod 31 extends into the second moving groove 211 .
[0042] Specifically, by providing the second moving groove 211 , the guide rod 31 can be retracted into the second moving groove 211 , thereby finally achieving the docking of the first U-shaped plate 1 and the second U-shaped plate 2 .
[0043] As another optional implementation of the elastic unit, Figure 5 As shown, the first curved plate portion 11 defines a first moving groove 111 , and the second curved plate portion 21 defines a second moving groove 211 ; one end of the guide rod 31 extends into the first moving groove 111 , and the other end of the guide rod 31 extends into the second moving groove 211 .
[0044] Specifically, the simultaneous provision of the first moving groove 111 and the second moving groove 211 enables the guide rod 31 to be retracted into the first moving groove 111 and the second moving groove 211 , thereby finally achieving docking of the first U-shaped plate 1 with the second U-shaped plate 2 .
[0045] In order to implement the power-on insulation test on the battery cell, the surface of the first U-shaped plate 1 , the surface of the second U-shaped plate 2 , and the surface of the elastic component 3 are all provided with a conductive layer.
[0046] Specifically, the conductive layer may be a copper layer, so as to achieve the purpose of conducting the entire test fixture.
[0047] In order to achieve the goal of pressing the battery core between the first U-shaped plate 1 and the second U-shaped plate 2, as shown in FIG. Figure 2 As shown, the test fixture further includes: a downward pressing driving member 4 ; the downward pressing driving member 4 is connected to the first U-shaped plate 1 .
[0048] Specifically, the pressing driving member 4 may be a cylinder.
[0049] The pressing driving member 4 is activated, the first U-shaped plate 1 is pressed down, and the two second chamfered edges 23 on the second U-shaped plate 2 fit with the chamfers of the edges of the battery cell. During the pressing process, the elastic member 32 is compressed until the two first chamfered edges 13 on the first U-shaped plate 1 fit with the chamfers of the edges of the battery cell. After this action is completed, the four chamfered edges of the battery cell will fit perfectly with the test fixture. Therefore, when the entire test fixture is powered on for insulation testing, even if the edge of the battery cell is damaged, it can be detected.
[0050] Embodiment 2, based on embodiment 1, this embodiment provides a battery insulation testing system, which includes: an insulation testing device and a test fixture as provided in embodiment 1; wherein the insulation testing device is electrically connected to the test fixture; the insulation testing device energizes the test fixture to perform an insulation test on the battery clamped in the test fixture.
[0051] Specifically, the insulation testing equipment adopts an insulation tester.
[0052] In summary, the utility model provides a first U-shaped plate and a second U-shaped plate to clamp the battery cell, and the two first chamfered edges and the two second chamfered edges fit with the four edges on the battery cell to achieve perfect fit and contact with the battery cell, thereby improving the accuracy of the battery cell insulation test and reducing the risk of missed detection of blue film damage on the battery cell. At the same time, an elastic component is provided to facilitate the placement of the battery cell and protect the battery cell.
[0053] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.
[0054] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0056] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.
[0057] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0058] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0059] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A test fixture, characterized in that: include: A first U-shaped plate, a second U-shaped plate and an elastic component; in The two first bent plate portions on the first U-shaped plate are respectively arranged with rounded corners with the first base plate portion to form two first chamfered edges; The two second bent plate portions on the second U-shaped plate are respectively arranged with rounded corners with the second base plate portion to form two second chamfered edges; The first U-shaped plate and the second U-shaped plate are respectively connected to the elastic components; The space between the first U-shaped plate and the second U-shaped plate is suitable for placing a workpiece, and the first U-shaped plate is suitable for squeezing the elastic component to move toward the second U-shaped plate until the first U-shaped plate and the second U-shaped plate cover the workpiece, and the two first chamfered edges and the two second chamfered edges are respectively fitted with the four edges on the workpiece.
2. The test fixture according to claim 1, characterized in that: The elastic component comprises: at least two elastic units; The first bent plate portion is movably connected to the corresponding second bent plate portion through at least one elastic unit, so that the first U-shaped plate and the second U-shaped plate are moved closer to or farther away from each other.
3. The test fixture as claimed in claim 2, characterized in that: The elastic unit comprises: a guide rod and an elastic member; The guide rod is connected to the first bent plate portion and the second bent plate portion respectively, and the elastic member is sleeved on the guide rod.
4. The test fixture as claimed in claim 3, characterized in that: The first curved plate portion is provided with a first moving groove; One end of the guide rod is fixed to the second bent plate portion, and the other end of the guide rod extends into the first moving groove.
5. The test fixture as claimed in claim 3, characterized in that: The second curved plate portion is provided with a second moving groove; One end of the guide rod is fixed to the first bent plate portion, and the other end of the guide rod extends into the second moving groove.
6. The test fixture as claimed in claim 3, characterized in that: The first curved plate portion is provided with a first moving groove, and the second curved plate portion is provided with a second moving groove; One end of the guide rod extends into the first moving groove, and the other end of the guide rod extends into the second moving groove.
7. The test fixture according to claim 1, characterized in that: A conductive layer is provided on the surface of the first U-shaped plate, the surface of the second U-shaped plate, and the surface of the elastic component.
8. The test fixture according to claim 1, wherein: Also includes: Press down the driving member; The pressing driving member is connected to the first U-shaped plate.
9. A battery insulation testing system, characterized in that: include: Insulation test equipment and a test fixture as claimed in any one of claims 1 to 8; in The insulation test equipment is electrically connected to the test fixture; The insulation test device energizes a test fixture to perform an insulation test on a battery clamped in the test fixture.
10. The battery insulation testing system according to claim 9, characterized in that: The insulation test equipment adopts an insulation tester.