Impact resistance testing device for lithium ion battery

Abstract

The utility model provides a lithium ion battery shock resistance testing device, which relates to the field of lithium ion battery shock resistance testing and comprises a shock resistance testing machine body, a suspension platform and a lithium ion battery, the lithium ion battery is suspended on the inner side of the shock resistance testing machine body through the suspension platform, and an elastic buffer is fixed on the upper end face of the suspension platform. An adjusting frame is connected to the lower end of the elastic buffer, a buffering pressing plate is connected to the inner side of the adjusting frame through a threaded rod, the lower surface of the buffering pressing plate is pressed downwards on the upper surface of the lithium ion battery through a vibration isolation base plate, a limiting plate is connected to the upper end of the buffering pressing plate through a spring, and the limiting plate is connected into a groove in the lower end face of the hanging table in a limiting mode. According to the utility model, the problem that the falling lithium ion battery rebounds and impacts the suspension mechanism to easily cause the failure of the impact resistance testing device due to the counter-acting force generated when the existing impact testing machine drives the lithium ion battery to fall to simulate impact is solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion battery impact resistance testing, in particular to a lithium ion battery impact resistance testing device. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery), which mainly relies on the movement of lithium ions between the positive and negative electrodes to work. Before lithium-ion batteries are produced and shipped out of the factory, the current batch of lithium-ion batteries must be subjected to impact resistance testing to ensure the quality of lithium-ion batteries. Among them, the heavy object impact testing machine is a special equipment for impact strength testing of finished or semi-finished batteries. It simulates the impact caused by accidental falling or collision during actual use of the battery to detect the impact resistance of the battery. However, the existing impact testing machine will generate a reaction force when driving the lithium-ion battery to fall and simulate the impact, causing the falling lithium-ion battery to rebound and hit the suspension mechanism, which can easily lead to the problem of malfunction of the impact testing device. Utility Model Content

[0003] In order to overcome the defects of the prior art, a lithium-ion battery impact test device is now provided to solve the problem that when the existing impact testing machine drives the lithium-ion battery to fall and simulate the impact, a reaction force is generated, causing the falling lithium-ion battery to rebound and hit the suspension mechanism, which can easily lead to the failure of the impact test device.

[0004] To achieve the above object, a lithium-ion battery impact test device is provided, comprising: an impact test body, a suspension platform and a lithium-ion battery, wherein the lithium-ion battery is suspended on the inner side of the impact test body through the suspension platform.

[0005] An elastic buffer is fixed to the upper end surface of the suspension platform, the lower end of the elastic buffer is connected to an adjustment frame, the inner side of the adjustment frame is connected to a buffer pressure plate through a threaded rod, the lower surface of the buffer pressure plate is pressed down on the upper surface of the lithium-ion battery through a vibration isolation pad, the upper end of the buffer pressure plate is connected to a limit plate through a spring, and the limit plate is limit-connected in the groove of the lower end surface of the suspension platform.

[0006] Furthermore, a protective door is installed at the front end of the impact resistance test body, a control panel is fixed at the left end of the impact resistance test body, and a sensor measurement element is embedded and installed on the inner side wall of the impact resistance test body.

[0007] Furthermore, the upper end of the suspension platform is connected to a lifting mechanism via a rope; and the lifting mechanism is installed on the inner side of the upper end of the impact resistance test body, and an impact platform is provided on the inner lower cavity surface of the impact resistance test body.

[0008] Furthermore, the lower end surface of the suspension platform is connected to the lithium-ion battery through a suspension belt, and the elastic buffer and the adjustment frame are symmetrically distributed on the left and right sides of the suspension platform.

[0009] Furthermore, a threaded rod is connected to the bearing inside the adjusting frame, and an adjusting column head is welded to the lower end of the threaded rod; and the adjusting column head penetrates and is located at the lower end of the adjusting frame.

[0010] Furthermore, the inner side of the buffer pressure plate is connected to the surface of the threaded rod through a driving block, and a pressure sensor is installed on the groove surface of the lower end surface of the suspension platform.

[0011] Furthermore, the elastic buffer, the adjustment frame, the threaded rod, the buffer pressure plate, the spring and the limit plate constitute an adjustable buffer mechanism of the suspension platform, and the upper and lower surfaces of the buffer pressure plate are bonded with vibration isolation pads.

[0012] The beneficial effect of the utility model is that the lithium-ion battery impact test device of the utility model utilizes an elastic buffer to adjust the buffer pressure plate to press down on the upper surface of the lithium-ion battery, so as to buffer the force of the lithium-ion battery falling impact rebound, and drive the suspension lifting mechanism to lift the lithium-ion battery after impact by sensing the force of the limit plate on the upper end of the buffer pressure plate squeezing the suspension platform, so as to effectively reduce the amplitude after impact, prevent the elastic buffer from excessive damage to the buffering load, avoid the normal operation of the suspension lifting mechanism damaged by the rebound impact of the lithium-ion battery, facilitate to reduce the strength of the reaction force received by the suspension lifting mechanism, and ensure a more durable test operation of the impact test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of a lithium-ion battery impact resistance testing device according to an embodiment of the utility model.

[0014] Figure 2 This is a schematic diagram of the front cross-sectional connection structure of the lithium-ion battery and the suspension platform according to an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of a partial side cross-sectional structure of the elastic buffer and the buffer pressure plate according to an embodiment of the utility model.

[0016] Figure 4 It is a side structural schematic diagram of a limiting plate according to an embodiment of the utility model.

[0017] In the figure: 1. impact test body; 11. control panel; 12. lifting mechanism; 13. sensor measuring element; 14. protective door; 15. impact table; 2. elastic buffer; 21. adjustment frame; 22. threaded rod; 23. adjustment column head; 3. suspension table; 31. suspension belt; 32. pressure sensor; 4. buffer pressure plate; 41. drive block; 42. limit plate; 43. spring; 44. vibration isolation pad; 5. lithium-ion battery. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4As shown, the utility model provides a lithium-ion battery impact test device, comprising: an impact test body 1, a suspension platform 3 and a lithium-ion battery 5. The lithium-ion battery 5 is suspended on the inner side of the impact test body 1 through the suspension platform 3.

[0019] An elastic buffer 2 is fixed to the upper end surface of the suspension platform 3, and the lower end of the elastic buffer 2 is connected to an adjustment frame 21. The inner side of the adjustment frame 21 is connected to a buffer pressure plate 4 through a threaded rod 22. The lower surface of the buffer pressure plate 4 is pressed down on the upper surface of the lithium-ion battery 5 through a vibration isolation pad 44. The upper end of the buffer pressure plate 4 is connected to a limit plate 42 through a spring 43, and the limit plate 42 is limitedly connected in the groove on the lower end surface of the suspension platform 3.

[0020] First, the lithium-ion battery 5 is suspended below the suspension platform 3, the buffer pressure plate 4 is adjusted to press down on the upper surface of the lithium-ion battery 5, the protective door 14 is closed, and the impact resistance test body 1 is started for testing. When the lithium-ion battery 5 falls and impacts, the buffer pressure plate 4 buffers the force of the lithium-ion battery 5 falling and impacting and rebounding, and drives the lifting mechanism 12 to lift the lithium-ion battery 5 after impact by sensing the force of the limit plate 42 at the upper end of the buffer pressure plate 4 squeezing the suspension platform, effectively reducing the amplitude after impact, preventing the elastic buffer from excessively damaging the buffering load, and avoiding the normal operation of the suspension lifting mechanism damaged by the rebound impact of the lithium-ion battery, which is convenient for reducing the strength of the reaction force received by the suspension lifting mechanism, and ensuring a more durable test operation of the impact resistance test device.

[0021] In this embodiment, a protective door 14 is installed at the front end of the impact test body 1, a control panel 11 is fixed at the left end of the impact test body 1, and a sensor measuring element 13 is embedded and installed on the inner wall of the impact test body 1. The upper end of the suspension platform 3 is connected to a lifting mechanism 12 through a rope; and the lifting mechanism 12 is installed on the inner side of the upper end of the impact test body 1, and an impact platform 15 is provided on the inner lower cavity surface of the impact test body 1. The lower end surface of the suspension platform 3 is connected to the lithium-ion battery 5 through a suspension belt 31, and the elastic buffer 2 and the adjustment frame 21 are symmetrically distributed on the left and right sides of the suspension platform 3.

[0022] As a preferred embodiment, the impact test body 1 is made of explosion-proof material to protect external test personnel. The lifting mechanism 12 is used to control the lifting and lifting height of the suspension platform 3. The sensor measuring element 13 is composed of a variety of sensors and measuring equipment to monitor parameters such as force, speed, acceleration, etc. during the impact process.

[0023] In this embodiment, a threaded rod 22 is connected to the bearing inside the adjusting frame 21 , and an adjusting column head 23 is welded to the lower end of the threaded rod 22 ; and the adjusting column head 23 penetrates and is located at the lower end of the adjusting frame 21 .

[0024] As a preferred implementation, the rotating adjustment column head 23 drives the threaded rod 22 to rotate forward and reversely, thereby achieving the effect of adjusting the distance between the buffer pressure plate 4 and the lithium-ion battery 5 .

[0025] In this embodiment, the inner side of the buffer pressure plate 4 is connected to the rod surface of the threaded rod 22 through the driving block 41 , and a pressure sensor 32 is installed on the groove surface of the lower end surface of the suspension platform 3 .

[0026] As a preferred embodiment, the driving block 41 converts the rotational motion of the threaded rod 22 into linear motion, thereby driving the buffer pressure plate 4 to move up and down, so as to fit the lithium-ion batteries 5 at different heights. The pressure sensor 32 is used to detect the extrusion pressure of the limit plate 42. When the pressure value reaches a preset range, the lifting mechanism 12 is controlled to lift the suspension platform 3, so as to separate the lithium-ion battery 5 and the impact platform 15, reduce the amplitude of the collision after the impact, and prevent the elastic buffer from excessive damage to the buffer load.

[0027] In this embodiment, the elastic buffer 2, the adjustment frame 21, the threaded rod 22, the buffer pressure plate 4, the spring 43 and the limit plate 42 constitute an adjustable buffer mechanism of the suspension platform 3, and the upper and lower surfaces of the buffer pressure plate 4 are bonded with vibration isolation pads 44.

[0028] As a preferred embodiment, the adjustable buffer mechanism of the suspension platform 3 is convenient for mitigating the amplitude after impact, preventing the elastic buffer from excessive damage to the buffer load, avoiding the lithium-ion battery from rebounding and impacting and damaging the normal operation of the suspension lifting mechanism, and facilitating reducing the intensity of the reaction force received by the suspension lifting mechanism.

[0029] The lithium-ion battery anti-impact test device of the utility model can effectively solve the problem that the rebound collision of the falling lithium-ion battery to the suspension mechanism can easily cause the anti-impact test device to malfunction, effectively reduce the amplitude after the impact, prevent the elastic buffer from excessive damage to the buffer load, and avoid the normal operation of the suspension lifting mechanism damaged by the rebound collision of the lithium-ion battery. It is convenient to reduce the intensity of the reaction force received by the suspension lifting mechanism, ensure the more durable test operation of the anti-impact test device, and is suitable for lithium-ion battery anti-impact test devices.

Claims

1. Lithium-ion battery impact test device, including: An impact resistance test machine (1), a suspension platform (3) and a lithium-ion battery (5), wherein the lithium-ion battery (5) is suspended on the inner side of the impact resistance test machine (1) via the suspension platform (3), and is characterized in that: An elastic buffer (2) is fixed to the upper end surface of the suspension platform (3); the lower end of the elastic buffer (2) is connected to an adjustment frame (21); the inner side of the adjustment frame (21) is connected to a buffer pressure plate (4) via a threaded rod (22); the lower surface of the buffer pressure plate (4) is pressed down on the upper surface of the lithium-ion battery (5) via a vibration isolation pad (44); the upper end of the buffer pressure plate (4) is connected to a limit plate (42) via a spring (43); the limit plate (42) is limit-connected in a groove on the lower end surface of the suspension platform (3).

2. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: A protective door (14) is installed at the front end of the impact resistance test body (1), a control panel (11) is fixed to the left end of the impact resistance test body (1), and a sensor measurement element (13) is embedded and installed on the inner wall of the impact resistance test body (1).

3. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: The upper end of the suspension platform (3) is connected to a lifting mechanism (12) via a rope; the lifting mechanism (12) is installed on the inner side of the upper end of the impact resistance test body (1), and an impact platform (15) is provided on the inner lower cavity surface of the impact resistance test body (1).

4. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: The lower end surface of the suspension platform (3) is connected to the lithium-ion battery (5) via a suspension belt (31), and the elastic buffer (2) and the adjustment frame (21) are symmetrically distributed on the left and right sides of the suspension platform (3).

5. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: The bearing inside the adjusting frame (21) is connected to a threaded rod (22), and an adjusting column head (23) is welded to the lower end of the threaded rod (22); and the adjusting column head (23) penetrates and is located at the lower end of the adjusting frame (21).

6. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: The inner side of the buffer pressure plate (4) is connected to the rod surface of the threaded rod (22) via a driving block (41), and a pressure sensor (32) is installed on the groove surface of the lower end surface of the suspension platform (3).

7. The lithium-ion battery impact resistance testing device according to claim 1, characterized in that: The elastic buffer (2), the adjustment frame (21), the threaded rod (22), the buffer pressure plate (4), the spring (43) and the limit plate (42) constitute an adjustable buffer mechanism of the suspension platform (3), and the upper and lower surfaces of the buffer pressure plate (4) are bonded with vibration isolation pads (44).

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