Vibration test bench for prolonging cycle life of lithium battery
By designing a vibration test bench, using structures such as fixed plates, side clamping plates, pneumatic cylinders and lower pressure plates to limit the position and vibration of lithium batteries, the reduction in cycle life of lithium batteries caused by lithium ion enrichment and virtual welding has been solved. This improves the uniformity of the internal environment of the battery core and extends the cycle life.
Patent Information
- Application Number
- CN202420921129.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-29
AI Technical Summary
During the use of lithium batteries, lithium ions are enriched due to the difference in gravity and concentration, resulting in differences in the internal environment of the battery cell. At the same time, the cap is not welded firmly, resulting in false welding, which can easily cause the power cell to catch fire and explode and reduce the cycle life.
A vibration test bench is designed. By installing structures such as fixed plates, side clamping plates, pneumatic cylinders and lower pressure plates on the loading platform, the all-round limit fixation of lithium batteries is achieved, and the vibration motor drives the loading platform to vibrate to alleviate the lithium battery. Ion enrichment problem.
Through the use of the vibration test bench, the adsorption and uniformity of the pole pieces inside the lithium battery cell are improved, which alleviates the differences in the lithium ion environment, extends the cycle life of the lithium battery, and can detect the problem of false soldering in time, improving safety. .
Smart Images
Figure CN222379858U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery processing, in particular to a vibration test bench for improving the cycle life of lithium batteries. Background Art
[0002] Lithium batteries are a widely used power source. The normal use time and charge and discharge times of normally produced batteries are limited according to different products. The lithium ion enrichment caused by gravity and concentration difference inside the battery cell causes the lithium ion environment inside the battery cell to be different. At the same time, the cold welding caused by the cap welding of the battery cell is easy to cause the battery cell to catch fire and explode during subsequent use. Utility Model Content
[0003] The problem solved by the utility model is to provide a vibration test bench for improving the cycle life of lithium batteries, which solves the problem that lithium ions are enriched in the battery core due to gravity and concentration difference, resulting in differences in the lithium ion environment inside the battery core. At the same time, the battery core has a technical problem that the cold welding caused by the loose cap welding of the battery core is easy to cause the battery core to catch fire and explode during subsequent use.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A vibration test bench for improving the cycle life of lithium batteries, comprising a loading platform, wherein fixed plates are installed in the middle of all four sides of the loading platform, and side clamping plates for contacting and limiting the outer side of the lithium battery are installed on the inner side of the fixed plates, an L-shaped bracket is installed on the top side of one of the fixed plates, a guide rail is vertically arranged on the bracket, and a lower pressure plate for contacting and limiting the top side of the lithium battery is installed on the guide rail, a vibration motor is installed in the middle of the bottom side of the loading platform, and springs are installed on all four sides of the bottom side of the loading platform, and the springs are connected to a base.
[0006] Preferably, a first pneumatic cylinder is installed on the outer side of the fixing plate, and the telescopic end of the first pneumatic cylinder passes through the fixing plate and is connected to the side clamping plate.
[0007] Preferably, a second pneumatic cylinder is installed on the top side of the bracket, and the telescopic end of the second pneumatic cylinder is connected to the lower pressure plate.
[0008] Preferably, guide rods are symmetrically installed on the top side of the lower pressure plate, and the guide rods pass through the bracket.
[0009] Preferably, insulating rubber pads are provided on the contact surfaces of the side clamping plates and the lower pressing plate with the lithium battery.
[0010] Preferably, a motor slot is provided in the middle of the base.
[0011] The beneficial effects of the utility model are as follows: the side clamping plate is driven to move and contact the side wall of the lithium battery by the operation of the first pneumatic cylinder, and the lower pressing plate is driven to move along the guide rail and contact the top side of the lithium battery by the operation of the second pneumatic cylinder, so as to realize the all-round limit fixation of lithium batteries of different specifications;
[0012] After vibration, the lithium ion enrichment inside the lithium battery cell caused by gravity and concentration difference is alleviated, the adsorption and uniformity of the electrode inside the cell are improved, and it is easy to detect the cold solder joint caused by the loose cap welding of the cell, thereby improving the cycle life of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a cross-sectional view of the base of the utility model.
[0015] Legend:
[0016] 1. Loading platform; 2. Fixing plate; 3. Side clamp; 4. First pneumatic cylinder; 5. Bracket; 6. Guide rail; 7. Second pneumatic cylinder; 8. Guide rod; 9. Lower pressure plate; 10. Spring; 11. Base; 12. Vibration motor; 13. Motor slot. DETAILED DESCRIPTION
[0017] 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 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.
[0018] Specific examples are given below.
[0019] See also Figure 1 and Figure 2, a vibration test bench for improving the cycle life of lithium batteries, comprising a loading platform 1, a fixed plate 2 is installed in the middle of all four sides of the loading platform 1, and a side clamping plate 3 for contacting and limiting the outer side of the lithium battery is installed on the inner side of the fixed plate 2, a first pneumatic cylinder 4 is installed on the outer side of the fixed plate 2, and the telescopic end of the first pneumatic cylinder 4 penetrates the fixed plate 2 and is connected to the side clamping plate 3, and the side clamping plate 3 is driven to move and contact the side wall of the lithium battery through the operation of the first pneumatic cylinder 4, an L-shaped bracket 5 is installed on the top side of one of the fixed plates 2, a guide rail 6 is vertically arranged on the bracket 5, and a lower pressure plate 9 for contacting and limiting the top side of the lithium battery is installed on the guide rail 6, a second pneumatic cylinder 7 is installed on the top side of the bracket 5, the telescopic end of the second pneumatic cylinder 7 is connected to the lower pressure plate 9, and a guide rod 8 is symmetrically installed on the top side of the lower pressure plate 9, and the guide rod 8 penetrates the bracket 5, and the lower pressure plate 9 is driven to move along the guide rail 6 and contact the top side of the lithium battery through the operation of the second pneumatic cylinder 7, so as to realize the all-round limit fixation of lithium batteries of different specifications;
[0020] A vibration motor 12 is installed in the middle of the bottom side of the loading platform 1. Springs 10 are installed around the bottom side of the loading platform 1, and the springs 10 are connected to the base 11. A motor slot 13 is opened in the middle of the base 11 to avoid contact and collision between the vibration motor 12 and the base 11 during vibration.
[0021] Insulating rubber pads are provided on the contact surfaces of the side clamping plates 3 and the lower pressing plate 9 with the lithium battery to achieve flexible contact clamping and avoid damage to the outer side of the lithium battery.
[0022] Place the lithium battery at the center of the loading platform 1, and drive the side clamp 3 to move and contact the side wall of the lithium battery through the operation of the first pneumatic cylinder 4, and drive the lower pressure plate 9 to move along the guide rail 6 and contact the top side of the lithium battery through the operation of the second pneumatic cylinder 7, so as to achieve all-round limit fixation of lithium batteries of different specifications, and drive the loading platform 1 and the lithium battery to vibrate through the operation of the vibration motor 12, so that the lithium ion enrichment inside the lithium battery cell caused by gravity and concentration difference is alleviated, the adsorption and uniformity of the electrode inside the cell are improved, and the difference in the lithium ion environment inside the cell is alleviated. The base 11 is fixed to the ground, and the influence of vibration on the base 11 is offset by the spring 10. After the vibration is completed, remove the lithium battery and observe the internal welding condition.
[0023] 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 vibration test bench for improving the cycle life of lithium batteries, characterized in that: The invention comprises a loading platform (1), wherein a fixing plate (2) is installed in the middle of all four sides of the loading platform (1), and a side clamping plate (3) for contacting and limiting the outer side of a lithium battery is installed on the inner side of the fixing plate (2); an L-shaped bracket (5) is installed on the top side of one of the fixing plates (2), a guide rail (6) is vertically arranged on the bracket (5), and a lower pressure plate (9) for contacting and limiting the top side of the lithium battery is installed on the guide rail (6); a vibration motor (12) is installed in the middle of the bottom side of the loading platform (1), and springs (10) are installed on all four sides of the bottom side of the loading platform (1), and the springs (10) are connected to a base (11).
2. A vibration test bench for improving the cycle life of lithium batteries according to claim 1, characterized in that: A first pneumatic cylinder (4) is installed on the outside of the fixing plate (2), and the telescopic end of the first pneumatic cylinder (4) penetrates the fixing plate (2) and is connected to the side clamping plate (3).
3. A vibration test bench for improving the cycle life of lithium batteries according to claim 2, characterized in that: A second pneumatic cylinder (7) is installed on the top side of the bracket (5), and the telescopic end of the second pneumatic cylinder (7) is connected to the lower pressure plate (9).
4. A vibration test bench for improving the cycle life of lithium batteries according to claim 3, characterized in that: A guide rod (8) is symmetrically mounted on the top side of the lower pressing plate (9), and the guide rod (8) passes through the bracket (5).
5. A vibration test bench for improving the cycle life of lithium batteries according to claim 4, characterized in that: Insulating rubber pads are provided on the contact surfaces of the side clamping plate (3) and the lower pressing plate (9) with the lithium battery.
6. A vibration test bench for improving the cycle life of lithium batteries according to claim 5, characterized in that: A motor slot (13) is provided in the middle of the base (11).