Tool for testing electrical performance of square aluminum shell single battery

Abstract

The utility model discloses an electrical performance test tool for a square aluminum shell single battery. The electrical performance test tool comprises a clamping part, the movable connecting part is arranged at the end part of the clamping part; the clamping part is used for clamping and fixing the single battery, and is matched with the movable connecting part to enable the single battery to move or be fixed in multiple directions in a multi-degree-of-freedom manner. According to the utility model, the clamping part movable connecting piece is adopted, so that the large surface of the tested battery is pressurized, and the requirement that the single battery testing environment is consistent with the actual application is met. And the problem that single batteries with different boundary dimensions cannot be universally used is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery electric performance test technical field, especially relate to a square aluminum shell single battery electric performance test frock. BACKGROUND

[0002] When the single battery carries out electric performance test, need to connect the positive and negative pole of the battery with the voltage line and the current line of the test equipment firmly (contact resistance is less than or equal to 0.1 omega), can guarantee the process of battery electric performance test charge-discharge, the heat quantity of the connection of the positive and negative pole of the battery and voltage / current line is as small as possible.Especially for the long-period cycle life test experiment of single battery, the firm connection of voltage line and current line will affect the heating of battery and the accuracy of test result. The positive and negative wiring mode commonly used in the industry is relatively complex: 1) the positive and negative pole is welded with the tab, the voltage line and the current line are pressed on the tab by bolt and nut through the tab opening mode.2) through the movable thimble and the battery bottom pressing mode, the movable thimble is pressed on the positive and negative pole, and the voltage line / current line is connected to the movable thimble.For different specifications and sizes of battery, the position of the positive and negative pole of the battery is not unified, and multiple frocks need to be matched to adapt to different sizes of battery.

[0003] The existing single battery electric performance test frock requires: 1) ensure that the contact resistance between the voltage line / current line and the positive and negative pole of the battery is less than or equal to 0.1 omega, ensure that the contact between the voltage line / current line and the positive and negative pole of the battery does not overheat under the high charge-discharge cycle of several thousand times in the long-period electric performance test process, which leads to test failure and fire;2) apply 1.5Nm pressure to the large surface of the single battery, ensure that the external pressure received by the battery during the electric performance test process is equivalent to the external pressure received when the battery is used in the module.

[0004] Problems with the existing technology: 1) The current industry practice involves welding tabs onto the positive and negative electrode posts, connecting them to the voltage and current lines through the perforated tabs. This solution ensures contact pressure between the positive and negative posts and the voltage and current lines, and by tightening the connecting bolts, ensures that the contact resistance is within the range of ≤0.1Ω. However, each cell tested requires welding two additional tabs (one for each positive and negative post), requiring an additional welding device. This welding device is only used for welding the tabs of individual cells, resulting in low utilization rates, significantly increasing testing costs and extending the test cycle. Furthermore, the requirement for increased pressure on large battery surfaces requires an additional clamping fixture. 2) The test fixture described in utility model patent CN 207473059U eliminates the need for tab welding on the positive and negative posts by utilizing a current test module mechanism fixed to the fixture workbench. A clamping device at the bottom, combined with the current test module mechanism, ensures a tight connection between the positive and negative posts and the ejector pins, thereby reducing contact resistance. However, for single cells of different dimensions, especially those with inconsistent thicknesses / widths, the positions of the positive and negative poles not only change in relative distance, but also in distance from the workbench. The test fixture of the above patent does not take into account the testing requirements of batteries of different dimensions. At the same time, the fixture fails to take into account the electrical performance test, where a 1.5Nm pressure needs to be applied to the large surface of the battery. In addition, due to the current design of the bottom clamping device + current test module mechanism on the workbench, the size of the single battery test fixture is large, which is not conducive to the simultaneous arrangement of multiple batteries on a plane for testing. Utility Model Content

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art. To achieve the above purpose, a square aluminum shell single battery electrical performance test fixture is used to solve the problems raised in the above background technology.

[0006] A square aluminum shell single battery electrical performance test tool, comprising:

[0007] a clamping member; and

[0008] A movable connecting member provided at the end of the clamping member;

[0009] The single battery is clamped and fixed by the clamping component, and the single battery is moved or fixed in multiple directions with multiple degrees of freedom in cooperation with the movable connection component.

[0010] As a further solution of the present invention, the clamping component includes a base plate, a pressure plate arranged parallel to the base plate, and a fixing component arranged perpendicular to the base plate and the pressure plate. Using a base plate + pressure plate and tightening bolts, the large surface of the test battery is pressurized, meeting the requirements of a single-cell battery testing environment that is consistent with actual application.

[0011] The bottom plate + pressing plate and pressing bolt mode is adopted to fix the position of the battery on the bottom plate, so that the contact pressure of the movable spring connector with the positive and negative poles of the battery can be ensured, and the contact resistance between the positive and negative poles of the battery and the spring connector is less than or equal to 0.1Ω.

[0012] The bottom plate + pressing plate and pressing bolt mode can cancel the bottom pressing device on the bottom plate for ensuring the contact force of the positive and negative poles with the spring connector, thereby shortening the size of the overall tooling, ensuring that a plane can be arranged with multiple toolings for testing at the same time, and reducing the testing cost.

[0013] As a further scheme of the utility model: the movable connecting part is arranged at the same side end of the bottom plate and the pressing plate. Arranging the movable connecting part at the same side end of the bottom plate and the pressing plate significantly improves the compactness and operation convenience of the structure. The same side layout reduces the mutual interference between components, makes the overall device more stable during operation, facilitates maintenance and replacement, improves work efficiency and user experience.

[0014] As a further scheme of the utility model: the movable connecting part includes a support plate arranged on the bottom plate, a top plate arranged on the support plate, a through hole arranged on the top plate, and a thimble arranged in the through hole. Through the ingenious combination of the support plate, the top plate, the through hole and the thimble, the movable connecting part not only realizes stable connection function, but also enhances the strength and flexibility of the structure. The support plate provides stable support for the top plate, and the through hole on the top plate allows the thimble to move flexibly. This design makes the pressure transmission more uniform, effectively prolongs the service life of the equipment, and improves the operation precision.

[0015] As a further scheme of the utility model: the through hole includes a horizontal through hole and a vertical through hole. The through hole adopts a combination of horizontal and vertical designs to provide multiple degrees of freedom for the movement of the thimble. This design allows the thimble to be more accurately positioned when applying pressure, avoiding deviation and misplacement, thereby improving the processing quality and consistency of the product. At the same time, the multi-dimensional through hole design also enhances the flexibility of the structure, adapting to more diversified work requirements.

[0016] As a further scheme of the utility model: the thimble is arranged in the through hole through a bolt, and the thimble adopts a telescopic structure. The thimble adopts a telescopic structure and is fixed in the through hole through a bolt. This design allows the thimble to be accurately adjusted in extension and retraction according to actual work requirements. This adjustment capability not only improves the adaptability and flexibility of the equipment, but also makes the pressure application more uniform and controllable, effectively preventing material damage or processing defects caused by excessive pressure.

[0017] As a further scheme of the utility model: the thimble is welded with an electronic component, and is provided with an insulating sleeve. The thimble is welded with the electronic component, and is equipped with the insulating sleeve, and this innovative design realizes the organic combination of machinery and electronics. The addition of the electronic component enables the equipment to monitor and control the pressure size in real time, improves the automation degree and processing precision. And the insulating sleeve effectively isolates the electrical interference between the electronic component and the mechanical component, and guarantees the safe and stable operation of the equipment.

[0018] As a further scheme of the utility model: the fixing component adopts the fixing structure of fastening bolt. The fixing component adopts the fixing structure of fastening bolt, and this design greatly enhances the connection strength and stability between components. The fastening bolt can effectively resist vibration and impact, prevents the components from loosening or falling off, thereby improving the overall reliability and durability of the equipment. Meanwhile, this fixing mode is convenient for installation and dismounting, reduces the maintenance cost and time.

[0019] Compared with the prior art, the utility model has the following technical effects:

[0020] Through the above technical scheme, the clamping component and the movable connecting component at the end thereof cooperate together to realize the clamping and fixing function of the single battery. Through this design, the single battery can realize multi-degree-of-freedom movement or fixing in multiple directions, thereby meeting different operation requirements and improving the flexibility and adaptability of the equipment. Through the form that the spring joint that can move up and down, left and right, and forward and backward six degrees of freedom and is fixed after determining the position is connected with the positive and negative pole column contact surface of the battery, the connection of the positive and negative pole column of the single battery and the voltage line and the current line is completed. BRIEF DESCRIPTION OF DRAWINGS

[0021] The specific embodiments of the utility model will be described in detail below with reference to the drawings:

[0022] Figure 1 It is the front view of the test tool of the disclosed embodiment of the application;

[0023] Figure 2 It is the side view of the test tool of the disclosed embodiment of the application;

[0024] Figure 3 It is the perspective view of the test tool of the disclosed embodiment of the application.

[0025] In the drawing: 1, clamping component; 11, bottom plate; 12, pressing plate; 13, fixing component; 2, movable connecting component; 21, support plate; 22, top plate; 23, through hole; 24, thimble; 3, insulating sleeve. DETAILED DESCRIPTION

[0026] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments only are a part of embodiments of the utility model, and not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0027] Please refer to Figure 1 In the embodiments of the utility model, a square aluminum shell single battery electrical performance test tool comprises:

[0028] Clamping component 1;And

[0029] The movable connecting component 2 is arranged at the end of the clamping component 1;

[0030] The single battery is clamped and fixed by the clamping component 1, and the single battery is moved or fixed in multiple directions and multiple degrees of freedom by cooperating with the movable connecting component 2.

[0031] In the embodiment, the clamping component 1 includes a bottom plate 11, a pressing plate 12 arranged in parallel with the bottom plate 11, and a fixing component 13 arranged perpendicularly with the bottom plate 11 and the pressing plate 12.

[0032] In the embodiment, the movable connecting component 2 is arranged at the same side end of the bottom plate 11 and the pressing plate 12.

[0033] Specifically, by the design of the bottom plate 11, the pressing plate 12 and the fixing component 13, the required pressure (1.5Nm) is applied to the large surface direction of the single battery.

[0034] In the embodiment, the movable connecting component 2 includes a support plate 21 arranged on the bottom plate 11, a top plate 22 arranged on the support plate 21, a through hole 23 arranged on the top plate 22, and a thimble 24 arranged in the through hole 23.

[0035] As Figure 2 The side view of the test tool is shown;

[0036] In the embodiment, the through hole 23 includes a horizontal through hole 23 and a vertical through hole 23.

[0037] In the embodiment, the thimble 24 is arranged in the through hole 23 by bolts, and the thimble 24 adopts a telescopic structure, and the structure of a spring joint can be selected.

[0038] The voltage line / current line is connected on the spring joint, and the connection of the positive and negative poles of the single battery and the voltage line and the current line is completed in the form that the spring joint is connected with the positive and negative pole column contact surface of the battery through six degrees of freedom of up and down, left and right, front and back, and the position is determined and fixed.

[0039] The single battery is fixed on the corresponding position of the bottom plate 11 by the bottom plate 11, the pressing plate 12 and the pressing bolt, and the spring joint end plate movable up and down can press the spring joint on the contact surface of the positive and negative pole columns of the battery, so as to ensure that the contact resistance is less than or equal to 0.1Ω.

[0040] Specifically, the bottom plate 11 and the pressing plate 12 are made of insulating materials (epoxy resin materials), which can ensure that the bottom plate 11 and the pressing plate 12 have certain mechanical strength and insulating performance, and prevent electric shock caused by accidental contact of personnel with the tool during testing.

[0041] In this embodiment, as shown in the figure, it is a perspective view of the test tool, and the top pin 24 is welded with electronic components and provided with an insulating sleeve 3. Figure 3

[0042] In this embodiment, the fixing component 13 adopts a fixing structure of a fastening bolt.

[0043] Embodiment 2

[0044] In the specific embodiment, the bottom plate 11, the pressing plate 12, the movable connecting component 2 and the fastening bolt are composed.

[0045] The movable connecting component 2 is composed of two telescopic top pins 24, a top plate 22 provided with transverse through holes 23 and vertical through holes 23, and a support plate 21 fixed on the bottom plate 11. The bottom plate 11 is slotted at the bottom, so that the top plate 22 can move in the Z-axis direction along the slot direction, and the top plate 22 can be fixed on the support plate 21 at a specified position by a bolt. The two telescopic top pins 24 can move in the Y-axis direction on the top plate 22 through the through holes 23 and the bolt. The voltage line and the current line are fixed on the top pin 24 by welding and are separated from the other components by the insulating sleeve 3. Through the telescopic movement of the top pin 24 in the X-axis direction, the movement of the top pin 24 in the Y-axis direction, and the movement of the top plate 22 in the Z-axis direction, the two top pins 24 can be freely moved and fixed in six directions, so that the tool can adapt to the electrical performance test requirements of the battery cells with different shapes and sizes (different pole column positions) at the same time. Through the cooperation of the bottom plate 11, the pressing plate 12 and the fastening bolt, a pressure of 1.5Nm is applied to the large surface of the single battery, and the position of the battery on the bottom plate 11 is fixed, so as to ensure that the contact between the pole column of the battery and the top pin 24 is tight, and the contact resistance is less than or equal to 0.1Ω.

[0046] Advantages:

[0047] The movable spring joint is used to replace the welding of the pole lug to connect the positive and negative pole columns of the battery with the voltage line and the current line, which can save the welding of the pole lug before testing each battery, and the pole lug cannot be removed once it is welded, thereby saving the cost of the preparation work before testing, keeping the appearance of the battery after testing, and enabling secondary use.​

[0048] The movable spring joint is adopted, the problem of repeated manufacturing of connection tooling due to different appearance specifications and sizes of the battery and non-uniform positions of the pole is avoided, one set of tooling can adapt to all styles of battery testing, and the manufacturing cost is reduced;

[0049] The bottom plate + pressing plate and pressing bolt mode is adopted to press the large surface of the test battery, and the requirements of the single battery test environment and the actual application are consistent.

[0050] The bottom plate + pressing plate and pressing bolt mode is adopted to fix the position of the battery on the bottom plate, which can ensure the contact pressure of the movable spring joint and the positive and negative poles of the battery, and ensure that the contact resistance between the positive and negative poles of the battery and the spring joint is ≤0.1Ω;

[0051] The bottom plate + pressing plate and pressing bolt mode can cancel the bottom pressing device on the bottom plate for ensuring the contact force of the positive and negative poles and the spring joint, thereby shortening the size of the overall tooling, ensuring that a plane can arrange multiple toolings and test at the same time, and reducing the test cost.

[0052] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0053] In addition, it should be understood that although the present application is described in the specification, each embodiment only contains one independent technical solution, and the description manner of the specification is only for the purpose of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A square aluminum shell single battery electrical performance test tool, characterized in that: include: A clamping component (1), the clamping component (1) comprising a base plate (11), a pressure plate (12) arranged parallel to the base plate, and a fixing component (13) arranged perpendicular to the base plate and the pressure plate; and a movable connecting component (2) provided at the end of the clamping component (1), the movable connecting component comprising a support plate (21) provided on the bottom plate, a top plate (22) provided on the support plate, a through hole (23) provided on the top plate, and a top pin (24) provided on the through hole; The single battery is clamped and fixed by the clamping component (1), and the single battery is moved or fixed in multiple directions and with multiple degrees of freedom in conjunction with the movable connection component (2).

2. The square aluminum shell single battery electrical performance test tool according to claim 1, characterized in that: The movable connection component (2) is arranged at the same side end of the bottom plate and the pressure plate.

3. The square aluminum shell single battery electrical performance test tool according to claim 2, characterized in that: The through holes include transverse through holes and vertical through holes.

4. The square aluminum shell single battery electrical performance test tool according to claim 3, characterized in that: The ejector pin is arranged in the through hole through a bolt, and the ejector pin adopts a telescopic structure.

5. The square aluminum shell single battery electrical performance test tool according to claim 4, characterized in that: The ejector pin is welded to an electronic component and is provided with an insulating sleeve (3).

6. The square aluminum shell single battery electrical performance test tool according to claim 1, characterized in that: The fixing component adopts a fixing structure of fastening bolts.

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