Battery expansion coefficient testing tool

Abstract

The utility model discloses a battery expansion coefficient testing tool, which relates to the technical field of battery testing, and comprises a setting plate, a first detection assembly arranged on the setting plate through a first elastic assembly, and a second detection assembly arranged on the setting plate through a second elastic assembly, the first detection assembly and the second detection assembly are opposite and form a detection interval for placing a battery, and the battery expands to extrude the first elastic assembly and the second elastic assembly to increase the distance between the first detection assembly and the second detection assembly. According to the utility model, the battery to be detected is placed in the detection interval on the mounting plate between the two groups of clamping plates, the driving assembly drives the adjusting assembly to drive the mounting rack to get close to each other, the mounting rack drives the first clamping plate and the second clamping plate to clamp the battery, and the two sides of the battery expand to push the first clamping plate and the second clamping plate respectively; and it is ensured that the first detection sensor and the second detection sensor detect the maximum swelling amount of the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery testing, and particularly relates to a testing tool for battery expansion coefficient. Background Art

[0002] The battery expansion coefficient refers to the degree of volume change of the battery during the charging and discharging process. The purpose of detecting the battery expansion coefficient is to evaluate whether the battery has expansion problems during use and to predict the battery life and safety. Battery expansion refers to the phenomenon that the battery expands in volume due to gas or heat generated by chemical reactions during charging and discharging. Battery expansion may cause problems such as battery shell rupture, internal structure damage, battery capacity reduction, and even cause safety accidents such as battery short circuit and explosion, so it needs to be tested.

[0003] At present, the initial force on the surface of the lithium battery is relatively small. As the charge and discharge life continues, the force on the surface of the lithium battery becomes greater and greater, resulting in a gradual increase in the thickness of the lithium battery. Since the spacing between the two clamps is fixed, the lithium battery squeezes the sensor onto the clamp, resulting in a deviation between the measured force and the actual force, resulting in low test accuracy.

[0004] A Chinese patent application with publication number "CN115453384A" discloses a battery expansion tester and a battery testing system. The battery expansion tester includes a support frame, a power mechanism, a transmission structure and a detection module. The power mechanism is installed on the support frame; the detection module is installed on the support frame and connected to the power mechanism through the transmission structure. The detection module includes a mounting plate, a limit plate, an expansion force detector and a displacement detector. A placement spacing for batteries is formed between the mounting plate and the limit plate. The mounting plate is movably connected to the limit plate. The expansion force detector is installed on the mounting plate and connected to the battery signal for detecting the force applied to the battery. The displacement detector is connected to the mounting plate for detecting the thickness of the battery.

[0005] The above equipment can only detect the expansion amount of one side of the battery. If the expansion amount of the two sides of the battery is different, it cannot be detected or needs to be turned over again. Utility Model Content

[0006] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a battery expansion coefficient testing tool to solve the existing problems.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A test fixture for battery expansion coefficient includes a mounting plate, and also includes a first detection component installed on the mounting plate through a first elastic component. A second detection component is also installed on the mounting plate through a second elastic component. The first detection component and the second detection component are opposite to each other and form a detection interval for placing the battery. The battery expands and squeezes the first elastic component and the second elastic component to increase the distance between the first detection component and the second detection component.

[0009] As a preferred technical solution, the first detection component includes a first detection sensor, the sensing end of the first detection sensor is contacted and connected with a first card plate, and the first detection sensor is installed on a first elastic component; the second detection component includes a second detection sensor, the sensing end of the second detection sensor is contacted and connected with a second card plate, and the second detection sensor is installed on a second elastic component; a detection interval is formed between the first card plate and the second card plate.

[0010] As a preferred technical solution, the first detection sensor and the second detection sensor and / or are pressure sensors.

[0011] As a preferred technical solution, the first detection component and / or the second detection component further includes a temperature sensor, and the temperature sensor is in contact with the battery.

[0012] As a preferred technical solution, the first elastic component includes a first outer plate and a first limiting spring; the first limiting spring is installed at one end of the first outer plate away from the first clamping plate, and the first detection sensor is installed on the first outer plate; the second elastic component includes a second outer plate and a second limiting spring, the second limiting spring is installed at one end of the second outer plate away from the second clamping plate, and the second detection sensor is installed on the second outer plate.

[0013] As a preferred technical solution, the first limit spring and the second limit spring are respectively installed on the mounting plate through a group of mounting frames, and the first outer plate and the second outer plate are both installed with support rods at one end close to the mounting frame, and the other end of the support rod passes through the mounting frame and is slidably connected to the mounting frame.

[0014] As a preferred technical solution, multiple groups of support rods are respectively inserted into the first limit spring and the second limit spring.

[0015] As a preferred technical solution, an adjustment component for adjusting the distance between two groups of mounting frames is installed on the setting plate. The adjustment component includes a movable end, and an extension plate of at least one group of mounting frames is installed on the movable end of the adjustment component.

[0016] As a preferred technical solution, the adjustment component is a screw slider module.

[0017] As a preferred technical solution, the adjusting component is connected to a driving component for driving the adjusting component.

[0018] In summary, the utility model mainly has the following beneficial effects:

[0019] The battery to be tested is placed in the testing interval on the mounting plate between the two groups of card plates, and the driving component is started. The driving component drives the adjusting component to drive the mounting frame to approach each other, and the mounting frame drives the first card plate and the second card plate to clamp the battery. The expansion of both sides of the battery pushes the first card plate and the second card plate respectively, and the first card plate and the second card plate push the first outer plate and the second outer plate away from the battery respectively. The first limit spring and the second limit spring are compressed, and the support rod makes the first limit spring and the second limit spring always perpendicular to the first outer plate and the second outer plate, ensuring that the first detection sensor and the second detection sensor detect the maximum expansion of the battery. The temperature sensor is attached to the outside of the battery to evenly test the temperature of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the elastic component and the detection component of the utility model;

[0023] Figure 4 It is a schematic diagram of the top view structure of the fixing plate of the utility model.

[0024] : 1. base, 2. clamping part, 21. clamping plate, 22. mounting screw, 23. adjusting knob handle, 24. anti-skid pad, 25. anti-skid protrusion, 26. anti-skid groove, 3. fixing plate, 4. adjusting component, 41. slide groove, 42. screw slider module, 61. first detection component, 611. first detection sensor, 612. first clamping plate, 62. second detection component, 621. second detection sensor, 622. second clamping plate, 63. temperature sensor, 64. support shaft, 71. first elastic component, 711. first outer plate, 712. first limit spring, 72. second elastic component, 721. second outer plate, 722. second limit spring, 73. support rod, 8. mounting frame, 9. transmission component, 91. turntable, 92. transmission pulley, 93. transmission belt, 10. driving component. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Example 1

[0027] refer to Figures 1 to 4 A battery expansion coefficient testing tool of this embodiment includes a mounting plate 3; a first detection component 61 installed on the mounting plate 3 by a first elastic component 71, and a second detection component 62 is also installed on the mounting plate 3 through a second elastic component 72. The first detection component 61 and the second detection component 62 are opposite to each other and form a detection interval for placing the battery. The battery expands and squeezes the first elastic component 71 and the second elastic component 72 to increase the distance between the first detection component 61 and the second detection component 62.

[0028] The first detection component 61 includes a first detection sensor 611, a sensing end of the first detection sensor 611 is in contact with a first card plate 612, and the first detection sensor 611 is installed on the first elastic component 71; the second detection component 62 includes a second detection sensor 621, a sensing end of the second detection sensor 621 is in contact with a second card plate 622, and the second detection sensor 621 is installed on the second elastic component 72; temperature sensors 63 are respectively installed at both ends of the first card plate 612 and the second card plate 622, and the temperature sensor 63 is in contact with the battery, and a detection interval is formed between the first card plate 612 and the second card plate 622.

[0029] Preferably, the first detection sensor 611 and the second detection sensor 621 are both pressure sensors.

[0030] A group of support shafts 64 are fixedly installed at both ends of the first clamping plate 612 and the second clamping plate 622. The two groups of support shafts 64 connected to the first clamping plate 612 are connected to the first elastic component 71; the two groups of support shafts 64 connected to both ends of the second clamping plate 622 are connected to the second elastic component 72.

[0031] The first elastic component 71 includes a first outer plate 711 and a first limiting spring 712; multiple groups of first limiting springs 712 are equidistantly installed at one end of the first outer plate 711 away from the first clamping plate 612, the first detection sensor 611 is installed in the middle of the first outer plate 711, and the support shaft 64 passes through the first outer plate 711; the second elastic component 72 includes a second outer plate 721 and a second limiting spring 722; multiple groups of second limiting springs 722 are equidistantly installed at one end of the second outer plate 721 away from the second clamping plate 622, the second detection sensor 621 is installed in the middle of the second outer plate 721, and the support shaft 64 passes through the second outer plate 721.

[0032] The first limit spring 712 and the second limit spring 722 are respectively installed on the fixing plate 3 through a group of mounting frames 8, and multiple groups of support rods 73 are installed on one end of the first outer plate 711 and the second outer plate 721 close to the mounting frame 8. The other end of the support rod 73 passes through the mounting frame 8 and is slidably connected to the mounting frame 8.

[0033] Preferably, the plurality of support rods 73 are respectively inserted into the first limit spring 712 and the second limit spring 722 .

[0034] An adjustment component 4 for adjusting the distance between the two groups of mounting frames 8 is installed on the fixing plate 3, and the adjustment component 4 includes a slide groove 41 and a screw slider module 42; the slide groove 41 is opened on the fixing plate 3, and the screw slider module 42 is rotatably installed in the slide groove 41, and the two groups of mounting frames 8 are respectively installed on the two sliders of the screw slider module 42.

[0035] Preferably, the screw slider module 42 is a bidirectional screw slider module.

[0036] A driving assembly 10 is installed on the setting plate 3 , and the driving assembly 10 is fixedly connected to one end of the screw slider module 42 .

[0037] Preferably, the driving assembly 10 is a motor.

[0038] Preferably, there are two sets of adjustment components 4.

[0039] A transmission assembly 9 is installed at one end of the adjustment assembly 4 away from the motor. The transmission assembly 9 includes a turntable 91, a transmission pulley 92 and a transmission belt 93. The two ends of the turntable 91 are fixedly connected to the screw rod and the transmission belt 93 respectively, and the two sets of transmission pulleys 92 are connected through the transmission belt 93.

[0040] A base 1 is installed at the bottom end of the fixing plate 3 , and a clamping member 2 is fixedly installed at the bottom of the base 1 . Two groups of clamping members 2 are respectively installed at two ends of the base 1 in the length direction.

[0041] The clamping component 2 includes a clamping plate 21, two groups of clamping plates 21 are fixedly installed on both sides of the bottom of the base 1, the bottom extension plate of the clamping plate 21 is threadedly connected with a mounting screw 22, the top of the mounting screw 22 passes through the bottom extension plate of the clamping plate 21, an adjusting button handle 23 is fixedly installed on the bottom of the mounting screw 22, and a non-slip pad 24 is detachably installed on the top of the mounting screw 22, the outer surface of the adjusting button handle 23 is fixedly connected with non-slip bumps 25 at equal intervals, and the top of the non-slip pad 24 is provided with non-slip strip grooves 26 at equal intervals.

[0042] The battery to be tested is placed in the testing area on the mounting plate 3 between the two groups of card plates 62, and the motor is started. The motor drives the screw of one group of screw slider modules 42 to rotate. The screw drives the turntable 91 to rotate, which can drive the transmission pulley 92 to rotate. The transmission pulley 92 drives another group of transmission pulleys 92 to rotate through the transmission belt 93. The rotation of the two groups of transmission pulleys 92 can drive the two groups of turntables 91 to rotate synchronously. The two groups of mounting frames 8 can be driven relatively close through the bidirectional screw slider module, and the first card plate 612 and the second card plate 622 clamp the battery. The expansion of the battery pushes the first The first clamp plate 612 and the second clamp plate 622, the first clamp plate 612 pushes the first outer plate 711 away from the battery, the second clamp plate 622 pushes the second outer plate 721 away from the battery, the first limit spring 712 and the second limit spring 722 are compressed, and the support rod 73 makes the first limit spring 712 and the second limit spring 722 always perpendicular to the first outer plate 711 and the second outer plate 721, so that the first detection sensor 611 and the second detection sensor 621 detect the maximum expansion of the battery, and the temperature sensor 63 is attached to both sides of the battery, so as to evenly test the temperature of both ends of the battery.

[0043] The support rod 73 is inserted into the first limiting spring 712 and the second limiting spring 722 , so that the first limiting spring 712 and the second limiting spring 722 are deformed only in the horizontal direction.

[0044] The test fixture is installed by adjusting the mounting screw 22 to contact the bottom extension plate of the clamping plate 21, and the mounting screw 22 is driven to rotate by twisting the adjusting knob handle 23. The anti-skid pad 24 and the anti-skid groove 26 are provided to improve the overall installation stability of the device and facilitate the use of the device. The anti-skid protrusions 25 are provided to increase the friction force of the outer surface of the adjusting knob handle 23 and facilitate twisting adjustment.

[0045] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery expansion coefficient testing tool, comprising a mounting plate (3), characterized in that: The invention also comprises a first detection component (61) mounted on the mounting plate (3) via a first elastic component (71); a second detection component (62) is also mounted on the mounting plate (3) via a second elastic component (72); the first detection component (61) and the second detection component (62) are opposite to each other and form a detection interval for placing a battery; the battery expands and squeezes the first elastic component (71) and the second elastic component (72) so that the distance between the first detection component (61) and the second detection component (62) increases.

2. A battery expansion coefficient testing tool according to claim 1, characterized in that: The first detection component (61) comprises a first detection sensor (611), a sensing end of the first detection sensor (611) is in contact with and connected to a first card plate (612), and the first detection sensor (611) is mounted on a first elastic component (71); the second detection component (62) comprises a second detection sensor (621), a sensing end of the second detection sensor (621) is in contact with and connected to a second card plate (622), and the second detection sensor (621) is mounted on a second elastic component (72); a detection interval is formed between the first card plate (612) and the second card plate (622).

3. A battery expansion coefficient testing tool according to claim 2, characterized in that: The first detection sensor (611) and the second detection sensor (621) and / or are pressure sensors.

4. The battery expansion coefficient testing tool according to claim 1, characterized in that: The first detection component (61) or / and the second detection component (62) further comprises a temperature sensor (63), and the temperature sensor (63) is in contact with the battery.

5. The battery expansion coefficient testing tool according to claim 1, characterized in that: The first elastic component (71) includes a first outer plate (711) and a first limiting spring (712); the first limiting spring (712) is installed at one end of the first outer plate (711) away from the first clamping plate (612), and the first detection sensor (611) is installed on the first outer plate (711); the second elastic component (72) includes a second outer plate (721) and a second limiting spring (722); the second limiting spring (722) is installed at one end of the second outer plate (721) away from the second clamping plate (622), and the second detection sensor (621) is installed on the second outer plate (721).

6. A battery expansion coefficient testing tool according to claim 5, characterized in that: The first limit spring (712) and the second limit spring (722) are respectively mounted on the fixing plate (3) via a set of mounting frames (8); a support rod (73) is mounted on one end of the first outer plate (711) and the second outer plate (721) close to the mounting frame (8); the other end of the support rod (73) passes through the mounting frame (8) and is slidably connected to the mounting frame (8).

7. A battery expansion coefficient testing tool according to claim 6, characterized in that: The plurality of support rods (73) are respectively inserted into the first limit spring (712) and the second limit spring (722).

8. The battery expansion coefficient testing tool according to claim 7, characterized in that: An adjusting assembly (4) for adjusting the distance between two groups of mounting frames (8) is mounted on the setting plate (3); the adjusting assembly (4) comprises a movable end, and an extension plate of at least one group of mounting frames (8) is mounted on the movable end of the adjusting assembly (4).

9. A battery expansion coefficient testing tool according to claim 8, characterized in that: The adjusting component (4) is a screw rod and slider module (42).

10. A battery expansion coefficient testing tool according to claim 8 or 9, characterized in that: The adjusting component (4) is connected to a driving component (10) for driving the adjusting component (4).

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