Static test structure for power lithium battery cover plate

Abstract

The utility model discloses a power lithium battery cover plate static test structure, which comprises a main block body and a connecting plate, the front edge of the main block body is provided with a first chamfer, the top surface, the right side surface and the back surface of the main block body are fixedly connected with direction blocks through fastening mechanisms, the top of each direction block is provided with a threaded opening, and the connecting plate is fixedly connected with the main block body. By means of the structure, measurement of torque and static force of the X axis, the Y axis and the Z axis of the lithium battery cover plate is successfully achieved, corresponding stress-strain curves are obtained, and the measurement accuracy is improved. The space three-dimensional torque and static force of the lithium battery cover plate are further obtained, evidence support is better provided for mechanical analysis of the lithium battery, the structure is simple, efficient and convenient to operate, meanwhile, due to the fact that the direction block is detachable, use can be saved, the use efficiency of the structure is greatly improved, cost is reduced, and the structure is suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cover plate testing, in particular to a static testing structure for a power lithium battery cover plate. Background Art

[0002] Lithium iron phosphate batteries are known for their high safety, long life and environmental protection characteristics, while ternary lithium batteries have their main advantages for their high energy density and excellent low-temperature performance. Compared with lithium iron phosphate batteries, ternary lithium batteries are smaller in size and weight, making the car load lighter. At the same time, their extreme operating temperature is lower and can be used in colder environments.

[0003] However, the safety of ternary lithium batteries is relatively low, and thermal runaway is prone to occur under conditions of overcharging, over-discharging, and high temperature, requiring more stringent management and protection measures. With the development of domestic lithium iron phosphate-ternary batteries, the industry's technical requirements for battery covers and aluminum shells have become increasingly stringent, and the mechanical reliability requirements for covers and aluminum shells have become increasingly higher. In order to ensure the reliability of the mechanical properties of the cover structure, the mechanical properties of the cover must be accurately measured.

[0004] To this end, a static testing structure for a power lithium battery cover is proposed, which is used to perform mechanical testing on the battery cover in an efficient, convenient and low-cost manner. Utility Model Content

[0005] The purpose of the utility model is to provide a static test structure for a power lithium battery cover plate, so as to solve the problem of how to efficiently, conveniently and at low cost test the mechanical properties of a power lithium battery cover plate proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a static test structure for a power lithium battery cover plate, comprising a main block and a connecting plate, the front edge of the main block is set as a first chamfer, the top surface, right side surface and back surface of the main block are fixedly connected with direction blocks through a fastening mechanism, a threaded opening is provided on the top of the direction block, the direction blocks on the top surface and right side surface of the main block are fixedly connected with positioning blocks near the first chamfer, a center hole is provided on the connecting plate, and the back edge of the connecting plate is set as a second chamfer.

[0007] Preferably, the main block and the connecting plate are fixedly connected by welding at the first chamfer and the second chamfer.

[0008] Preferably, the fastening mechanism comprises docking recesses provided on the top surface, right side surface and back surface of the main block body, an internal threaded tube is embedded in the inner bottom surface of the docking recess, and the direction block can be inserted into the docking recess.

[0009] Preferably, the internally threaded pipe is threadedly connected with a bolt, and the bolt passes through the inner bottom surface of the threaded opening.

[0010] Preferably, the front side of the connecting plate is fixedly connected to the power lithium battery cover plate by welding.

[0011] Preferably, the bolt can pass through a threaded opening, and the threaded opening is detachably fixedly connected to the stress detector.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Through the setting of the connecting plate, the center hole and the second chamfer, the welding between the connecting plate and the power lithium battery cover plate is more firm, and it is also convenient to weld the main block and the connecting plate at the second chamfer and the first chamfer. The setting of the positioning block is utilized, so that the connecting plate welded with the power lithium battery cover plate is easier to position when it is aligned with the main block for welding. At the same time, the direction block is utilized to quickly fix the top surface, side surface and back surface of the main block, and the direction block will be threadedly connected to the end of the stress detector in the prior art at the threaded mouth, thereby successfully realizing the test of the X, Y, and Z axes of the power lithium battery cover plate, and obtaining its three-dimensional torque and static force in space, thereby better providing evidence support for the mechanical analysis of lithium batteries. The structural setting is simple, efficient, easy to operate, and suitable for popularization and use.

[0014] 2. The setting of the fastening mechanism makes it easy to disassemble and combine the direction block and the main block. Since the test process is a destructive test, it not only successfully realizes the measurement of the torque and static force of the X, Y, and Z axes of the lithium battery cover, and obtains the corresponding stress-strain curve, but also saves the direction block and reduces the test cost. The structure is simple and suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural view of the utility model;

[0016] Figure 2 This is a schematic diagram of the connection between the direction block and the positioning block in the utility model;

[0017] Figure 3 This is a structural view of the clamping mechanism in the utility model;

[0018] Figure 4 It is a schematic diagram of the connection between the main block and the direction block in the utility model.

[0019] In the figure: 1. main block; 101. first chamfer; 102. docking notch; 103. internal threaded pipe; 2. connecting plate; 201. center hole; 202. second chamfer; 3. direction block; 301. positioning block; 302. threaded mouth; 4. bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] Reference Figure 1-4 As shown, the utility model provides a technical solution for a static test structure of a power lithium battery cover:

[0022] A static test structure for a power lithium battery cover plate comprises a main block 1 and a connecting plate 2, wherein the front edge of the main block 1 is set as a first chamfer 101, the top surface, right side surface and back surface of the main block 1 are fixedly connected with a direction block 3 through a fastening mechanism, a threaded opening 302 is provided on the top of the direction block 3, the top surface and right side surface of the main block 1 are fixedly connected with a positioning block 301 near the first chamfer 101, a center hole 201 is provided on the connecting plate 2, and the back edge of the connecting plate 2 is set as a second chamfer 202.

[0023] It should be additionally explained that the main block 1 and the connecting plate 2 are fixedly connected by welding at the first chamfer 101 and the second chamfer 202 .

[0024] By setting the connecting plate 2, the center hole 201 and the second chamfer 202, the welding between the connecting plate 2 and the power lithium battery cover plate is made stronger, and it is also convenient to weld the main block 1 and the connecting plate 2 at the second chamfer 202 and the first chamfer 101, and the setting of the positioning block 301 is utilized, so that the connecting plate 2 welded with the power lithium battery cover plate is easier to position when it is aligned with the main block 1 for welding. At the same time, the direction block 3 is utilized to quickly fix the top surface, side surface and back surface of the main block 1, and the direction block 3 will be threadedly connected to the end of the stress detector in the prior art at the threaded mouth 302, thereby successfully realizing the test of the X, Y, and Z axes of the power lithium battery cover plate, and obtaining its three-dimensional torque and static force in space, thereby better providing evidence support for the mechanical analysis of lithium batteries. The structural setting is simple and efficient, and the operation is convenient, which is suitable for popularization and use.

[0025] The fastening mechanism includes docking recesses 102 provided on the top, right and back surfaces of the main block 1 , an internal threaded tube 103 is embedded in the inner bottom surface of the docking recess 102 , and the direction block 3 can be inserted into the docking recess 102 .

[0026] Among them, it should be additionally explained that the internal threaded tube 103 is threadedly connected with a bolt 4, the bolt 4 passes through the inner bottom surface of the threaded opening 302, the front of the connecting plate 2 is fixedly connected to the power lithium battery cover plate by welding, the bolt 4 can pass through the threaded opening 302, and the threaded opening 302 is detachably fixedly connected to the stress detector.

[0027] The setting of the fastening mechanism allows the direction block 3 and the main block 1 to be easily disassembled and combined. Since the test process is a destructive test, it not only successfully realizes the measurement of the torque and static force of the X, Y, and Z axes of the lithium battery cover, and obtains the corresponding stress-strain curve, but also saves the direction block 3 and reduces the test cost. The structure is simple and suitable for popularization and use.

[0028] Working principle: When using this structure, first weld the front side of the connecting plate 2 to the lithium battery cover plate, and further weld it at the center hole 201. When it is necessary to measure the torque and static force in the Z-axis direction of the lithium battery cover plate, the user only needs to fix the two direction blocks 3 in the docking recesses 102 opened on the top and right sides of the main block 1 through bolts 4, and the bolts 4 will be threadedly connected with the internal threaded tube 103 to fix the direction block 3. At this time, align the connecting plate 2 with the positioning area of ​​the positioning blocks 301 on the two direction blocks 3, and weld them at the first chamfer 101 and the second chamfer 202. The connecting plate 2 can be fixedly connected to the main block 1 more quickly and stably. Then unscrew the bolt 4 on the right side of the main block 1, take out the direction block 3 on the right side of the main block 1, and then thread the end of the stress detector in the prior art to the threaded port 302. The torque and static force of the Z-axis of the lithium battery cover plate can be measured to obtain the stress-strain curve.

[0029] Correspondingly, the present structure can also measure the torque and static force of the X and Y axes of the lithium battery cover, and obtain the corresponding stress-strain curve, thereby obtaining the spatial three-dimensional torque and static force of the lithium battery cover, thereby better providing evidence support for the mechanical analysis of the lithium battery. The structure is simple, efficient and easy to operate. At the same time, since the direction block 3 is detachable, it can be used economically, which greatly improves the use efficiency of the present structure, reduces the cost, and is suitable for popularization.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A static test structure for a power lithium battery cover, comprising a main block (1) and a connecting plate (2), characterized in that: The front edge of the main block (1) is arranged as a first chamfer (101); the top surface, right side surface and back surface of the main block (1) are fixedly connected to a direction block (3) via a fastening mechanism; a threaded opening (302) is provided on the top of the direction block (3); the direction blocks (3) on the top surface and right side surface of the main block (1) are fixedly connected to positioning blocks (301) near the first chamfer (101); a center hole (201) is provided on the connecting plate (2); and the back edge of the connecting plate (2) is arranged as a second chamfer (202).

2. A static test structure for a power lithium battery cover according to claim 1, characterized in that: The main block (1) and the connecting plate (2) are fixedly connected by welding at the first chamfer (101) and the second chamfer (202).

3. A static test structure for a power lithium battery cover according to claim 2, characterized in that: The fastening mechanism comprises docking recesses (102) provided on the top surface, right side surface and back surface of the main block body (1), an internal threaded tube (103) is embedded in the inner bottom surface of the docking recess (102), and the direction block (3) can be inserted into the docking recess (102).

4. A static test structure for a power lithium battery cover according to claim 3, characterized in that: The internally threaded tube (103) is threadedly connected with a bolt (4), and the bolt (4) passes through the inner bottom surface of the threaded opening (302).

5. A static test structure for a power lithium battery cover according to claim 4, characterized in that: The front side of the connecting plate (2) is fixedly connected to the power lithium battery cover plate by welding.

6. A static test structure for a power lithium battery cover according to claim 5, characterized in that: The bolt (4) can pass through the threaded opening (302), and the threaded opening (302) is detachably fixedly connected to the stress detector.

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