Battery cell simulation stress test device
By designing a battery cell simulation force testing device, using hydraulic presses and fire extinguishers, the accuracy and safety of the force testing of lithium-ion batteries are solved, improving the battery cycle life and preventing the fire from expanding.
Patent Information
- Application Number
- CN202422085772.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The prior art is difficult to effectively test the change in the stress of lithium-ion batteries during charging and discharging, which affects their initial state and cycle life, and there is a fire risk during the test.
A battery cell simulation force testing device is designed, including a hydraulic press, a pressure plate, a pressure sensor, a ply plate and a fire extinguisher. Pressure is applied through the hydraulic press, the sensor measures the force, the ply plate fixes the battery cell, and the fire extinguisher quickly extinguishes the fire to ensure the stability and safety of the test.
Accurate testing of the changes in the stress of lithium-ion batteries is achieved, the battery cycle life is improved, and the fire is extinguished quickly during the test, avoiding the expansion of the fire, and ensuring the safety of the test.
Smart Images
Figure CN223078087U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a core simulation stress test device. Background Art
[0002] Lithium-ion batteries have the characteristics of high specific capacity, long cycle life, environmental friendliness, etc., and are widely used in fields such as portable devices and electric vehicles. In recent years, with the rapid development of electric vehicles, higher requirements have been put forward for lithium-ion batteries.
[0003] During the charging and discharging process of lithium-ion batteries, with the change of the charging and discharging depth, the size of lithium-ion batteries will change to a certain extent. During the PACK matching process of lithium-ion batteries, certain force constraints will be applied to the lithium-ion batteries, and the magnitude of the force affects the initial state and cycle life of the batteries. Appropriate external force constraints are beneficial to the lithium-ion transfer of the internal resistance of lithium-ion batteries, reduce the internal resistance of the batteries, reduce the deformation of lithium-ion batteries, and extend the battery life. In order to test the optimal stress state during the cycle of lithium-ion batteries, provide the optimal constraint force control during PACK matching, and improve the cycle life of lithium-ion batteries after matching, a core simulation stress test device is made. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a core simulation stress test device, which solves the above-mentioned technical problems.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A core simulation stress test device includes a base. An installation groove and a test cavity are recessed in the base. A hydraulic press is fixedly installed inside the installation groove. A pressure plate is fixedly installed on the telescopic rod of the hydraulic press. The pressure plate penetrates and slides inside the base. One end of the pressure plate away from the hydraulic press communicates with the inside of the test cavity. A pressure sensor is built in the pressure plate. The probe of the pressure sensor is embedded and installed on the surface of the end of the pressure plate away from the hydraulic press. A clamping plate is slidably installed inside the test cavity. A screw rod is rotatably installed at one end of the clamping plate away from the pressure plate. The screw rod penetrates and is threadedly installed on the surface of the base. A T-shaped rod is fixedly installed on the surface of the clamping plate. The T-shaped rod penetrates and slides on the surface of the base.
[0006] Preferably, a chute is recessed in the lower inner wall of the test cavity. A convex block is slidably sleeved inside the chute. The convex block is fixedly installed at the bottom of the clamping plate. The T-shaped rods are symmetrically arranged with the screw rod as the center.
[0007] Preferably, a sealing slide rail is recessed in the upper end inside the test cavity. A limiting slider is slidably sleeved inside the sealing slide rail. A cover plate is fixedly installed at the end of the limiting slider. The side wall of the cover plate is hermetically attached to the inner wall of the test cavity. A handle is fixedly installed on the surface of the cover plate.
[0008] Preferably, a fire extinguisher is detachably installed on the top of the cover plate, and the jet port of the fire extinguisher penetrates through the top of the cover plate.
[0009] Compared with the related art, a cell simulated stress test device provided by the present utility model has the following beneficial effects:
[0010] The present utility model provides a cell simulated stress test device. By placing the cell to be tested inside the test chamber, then rotating the screw rod, and with the limiting effect of the T-shaped rod sliding on the surface of the base, the clamping plate moves horizontally inside the test chamber, thereby clamping the cell to be tested, avoiding shaking or deviation during the test, which affects the test data. Then, start the hydraulic press to make its telescopic rod push the pressure plate to move, and then conduct a stress test on the cell located inside the test chamber. During the process, the pressure sensor collects the pressure data, which is convenient for testing the stress magnitude and change of the cell during the cycle, testing the appropriate restraint external force, and improving the cycle life of the battery.
[0011] The present utility model provides a cell simulated stress test device. During the cell test process, when testing the maximum pressure data of the cell, it is easy to cause the cell to be damaged and catch fire. After a fire accident occurs to the battery, push the handle to make the limit slider slide inside the sealed slide rail, drive the cover plate to slide to the top of the test chamber, thereby achieving the effect of sealing the inside of the test chamber. After the cover plate seals the test chamber, start the fire extinguisher to spray fire extinguishing materials into the test chamber to quickly extinguish the fire of the battery and avoid the expansion of the fire, resulting in property losses. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0013] Figure 2 is a schematic diagram of the pressure plate structure of the present utility model;
[0014] Figure 3 is a schematic diagram of the test chamber structure of the present utility model;
[0015] Figure 4 is a schematic diagram of the clamping plate structure of the present utility model.
[0016] In the figure: 1, base, 11, installation groove, 12, hydraulic press, 13, pressure plate, 14, cover plate, 15, handle, 16, fire extinguisher, 17, test chamber, 18, T-shaped rod, 19, screw rod, 2, clamping plate, 21, chute, 22, sealed slide rail, 23, convex block, 24, limit slider, 25, pressure sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] Please refer to Figures 1 - 4, the present utility model provides a technical solution, including a base 1. An installation groove 11 and a test chamber 17 are recessed in the base 1. A hydraulic press 12 is fixedly installed inside the installation groove 11. A pressure plate 13 is fixedly installed on the telescopic rod of the hydraulic press 12. The pressure plate 13 penetrates and slides inside the base 1. One end of the pressure plate 13 away from the hydraulic press 12 communicates with the inside of the test chamber 17. A pressure sensor 25 is built in the pressure plate 13. The probe of the pressure sensor 25 is embedded and installed on the surface of the end of the pressure plate 13 away from the hydraulic press 12. A clamping plate 2 is slidably installed inside the test chamber 17. A screw rod 19 is rotatably installed at one end of the clamping plate 2 away from the pressure plate 13. The screw rod 19 penetrates and is threadedly installed on the surface of the base 1. A T-shaped rod 18 is fixedly installed on the surface of the clamping plate 2. The T-shaped rod 18 penetrates and slides on the surface of the base 1;
[0018] By placing the cell to be tested inside the test chamber 17, then rotating the screw rod 19, and due to the limiting effect of the sliding of the T-shaped rod 18 on the surface of the base 1, the clamping plate 2 moves horizontally inside the test chamber 17, so as to clamp the cell to be tested, avoiding shaking or offset during the test, which affects the test data. Then start the hydraulic press 12 to make its telescopic rod push the pressure plate 13 to move, and then conduct a force test on the cell located inside the test chamber 17. During the process, the pressure sensor 25 collects the pressure data, which is convenient for testing the force magnitude and change of the cell during the cycle, testing the appropriate restraint external force, and improving the cycle life of the battery.
[0019] A chute 21 is recessed in the lower inner wall of the test chamber 17. A convex block 23 is slidably sleeved inside the chute 21. The convex block 23 is fixedly installed at the bottom of the clamping plate 2. The T-shaped rods 18 are symmetrically structured with the screw rod 19 as the center;
[0020] During the process of the test chamber 17 rotating and moving through the clamping plate 2, the convex block 23 slides inside the chute 21, making the movement of the test chamber 17 more stable, further improving the stability of the battery clamping and reducing shaking.
[0021] A sealing slide rail 22 is recessed in the upper end inside the test chamber 17. A limiting slider 24 is slidably sleeved inside the sealing slide rail 22. A cover plate 14 is fixedly installed at the end of the limiting slider 24. The side wall of the cover plate 14 is hermetically attached to the inner wall of the test chamber 17. A handle 15 is fixedly installed on the surface of the cover plate 14; A fire extinguisher 16 is detachably installed on the top of the cover plate 14. The spraying port of the fire extinguisher 16 penetrates and is opened on the top of the cover plate 14;
[0022] During the cell testing process, when testing the maximum pressure data of the cell, it is easy to cause the cell to be damaged and catch fire. After a battery fire accident occurs, push the handle 15 to make the limit slider 24 slide inside the sealing slide rail 22, driving the cover plate 14 to slide to the top of the test chamber 17 so as to achieve the effect of sealing the inside of the test chamber 17. After the cover plate 14 seals the test chamber 17, start the fire extinguisher 16 to spray fire extinguishing materials into the test chamber 17 to quickly extinguish the fire of the battery and prevent the fire from spreading and causing property losses.
Claims
1. A cell simulated stress test device, comprising a base (1), characterized in that: The base (1) is recessed with an installation groove (11) and a test chamber (17). A hydraulic press (12) is fixedly installed inside the installation groove (11). The telescopic rod of the hydraulic press (12) is fixedly installed with a pressing plate (13). The pressing plate (13) penetrates and slides inside the base (1). One end of the pressing plate (13) away from the hydraulic press (12) communicates with the inside of the test chamber (17). A pressure sensor (25) is built in the pressing plate (13). The probe of the pressure sensor (25) is embedded and installed on the surface of the end of the pressing plate (13) away from the hydraulic press (12). A clamping plate (2) is slidably installed inside the test chamber (17). A screw rod (19) is rotatably installed at one end of the clamping plate (2) away from the pressing plate (13). The screw rod (19) penetrates and is threadedly installed on the surface of the base (1). A T-shaped rod (18) is fixedly installed on the surface of the clamping plate (2). The T-shaped rod (18) penetrates and slides on the surface of the base (1).
2. The cell simulated stress test device according to claim 1, wherein: A chute (21) is recessed in the lower inner wall of the test chamber (17). A convex block (23) is slidably sleeved inside the chute (21). The convex block (23) is fixedly installed at the bottom of the clamping plate (2). The T-shaped rods (18) are symmetrically structured with the screw rod (19) as the center.
3. The cell simulated stress test device according to claim 2, characterized in that: A sealing slide rail (22) is recessed at the upper end inside the test chamber (17). A limit slider (24) is slidably sleeved inside the sealing slide rail (22). A cover plate (14) is fixedly installed at the end of the limit slider (24). The side wall of the cover plate (14) is hermetically attached to the inner wall of the test chamber (17). A handle (15) is fixedly installed on the surface of the cover plate (14).
4. The cell simulated stress test device according to claim 3, wherein: A fire extinguisher (16) is detachably installed on the top of the cover plate (14). The spraying port of the fire extinguisher (16) penetrates and is opened on the top of the cover plate (14).