Cylindrical battery external short circuit testing device

Abstract

The utility model discloses a cylindrical battery external short circuit testing device, which comprises clamping plates (2) arranged at two ends of a battery (1), the inner sides of the clamping plates (2) are provided with fixing sleeves (3), the battery (1) is inserted in the fixing sleeves (3), the clamping plates (2) are provided with stabilizing pieces (8) for clamping the battery (1), the fixing sleeves (3) are internally provided with contact terminals (4), and the contact terminals (4) are connected with the fixing sleeves (3). One side, far away from the fixing sleeve (3), of the clamping plate (2) is provided with a power line (5) and a voltage temperature sensing measuring line (6) which are connected with the contact terminal (4); the position of the cylindrical battery (1) is limited through the fixing sleeve (3), the battery (1) can be stabilized and positioned through the stabilizing piece (8) and the fixing sleeve (3), the voltage and temperature sensing measuring line (6) can be directly connected with a multi-path thermodetector, voltage and temperature at the two ends of the cylindrical battery (1) can be effectively monitored, and failure analysis and research of the battery (1) are facilitated.

Description

An external short-circuit test device for cylindrical batteries Technical Field

[0001] This utility model belongs to the field of battery testing technology. Specifically, this utility model relates to an external short-circuit testing device for cylindrical batteries. Background Technology

[0002] Cylindrical batteries, as an important branch of the lithium battery field, are widely used in various fields such as solar lighting, lawn lighting, backup power, power tools, toy models, and photovoltaic energy due to their high capacity, long cycle life, and wide operating temperature range. Cylindrical batteries are divided into different systems such as lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide, cobalt-manganese hybrid, and ternary materials. The casing is divided into steel casing and polymer casing. Among them, steel casing cylindrical lithium iron phosphate batteries have become the mainstream product in the market due to their high capacity, high output voltage, good charge and discharge cycle performance, electrochemical stability, and wide operating temperature range.

[0003] However, while cylindrical batteries have developed rapidly, their safety performance has become a focus of attention both inside and outside the industry. Battery safety is not only related to user experience, but also directly related to the personal safety of users. The external short-circuit test of lithium batteries can simulate the battery's reaction under external short-circuit conditions and evaluate the battery's safety performance under such conditions. This test can verify whether the battery is safe and reliable when subjected to external short circuits, which is crucial for both battery manufacturers and users. If a battery explodes or catches fire when subjected to a short circuit, it will cause great harm to people. Through short-circuit tests, such dangerous situations can be predicted, and corresponding preventive measures can be taken to avoid accidents.

[0004] A patent application (patent number 202023177024.4) published on October 2021 discloses a cylindrical battery testing fixture. The fixture includes a base plate providing overall support. A clamping block for securing the cylindrical battery is fixedly connected to the upper surface of the base plate. Fixing plates are fixedly connected to both sides of the cylindrical battery on the base plate. Probes for testing are movably mounted on the fixing plates, making contact with the surface of the cylindrical battery. This cylindrical battery testing fixture ensures a good connection between the cylindrical battery and the testing equipment. The fixture is adjustable along the length of the cylindrical battery using springs, and the cylindrical battery is secured by compression springs. It is easy to operate, facilitating testing by personnel. The fixture has a simple structure, is easy to maintain, and is suitable for repeated use.

[0005] Due to the unique structure of the positive and negative electrodes of cylindrical batteries, they cannot be directly connected using clamps. Therefore, in external short-circuit tests, it is impossible to directly test through the positive and negative electrodes of the short-circuit tester. This technical challenge not only increases the difficulty of testing but also affects the accuracy and reliability of the test results. Summary of the Invention

[0006] This utility model aims to

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an external short-circuit test device for a cylindrical battery, comprising clamps disposed at both ends of the battery, a fixing sleeve disposed on the inner side of the clamps, the battery being inserted into the fixing sleeve, a stabilizing component for holding the battery disposed on the clamps, a contact terminal disposed inside the fixing sleeve, and a power line and a voltage and temperature sensing measurement line connected to the contact terminal disposed on the side of the clamps away from the fixing sleeve.

[0008] The side of the fixing sleeve is provided with a support plate mounted on the clamp.

[0009] The clamping plate is a ceramic plate.

[0010] The stabilizing component is a pressure bar set on the clamping plate, and a pressure plate is provided inside the fixing sleeve. A tension rope is provided between the pressure plate and the pressure bar.

[0011] The contact terminals are mounted on the pressure plate, and a pressure spring is provided between the pressure plate and the clamping plate.

[0012] A rotating base is bonded to the clamp plate, and the pressure rod is hinged to the rotating base.

[0013] The end of the pressure bar away from the clamping plate is equipped with a rubber rod.

[0014] The outer edge of the clamp is provided with a shell, a fixing member is provided between the shells, and a positioning rod is provided between the shells.

[0015] The fastener includes a cross plate mounted on the outer casing, the cross plate having meshing racks, and a rubber collar mounted on the cross plate, the rubber collar being fitted onto two cross plates.

[0016] The technical advantages of this invention are as follows: the position of the cylindrical battery is restricted by the fixing sleeve, and the presence of the fixing sleeve can better fix the battery, and the stabilizing component can stabilize and position the battery, which facilitates subsequent short-circuit testing. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 is a schematic diagram of the structure of an external short-circuit test device for a cylindrical battery according to the present invention.

[0019] Figure 2 is a schematic diagram of the stabilizer of an external short-circuit test device for a cylindrical battery as shown in Figure 1.

[0020] Figure 3 is a schematic diagram of the contact terminals of an external short-circuit test device for a cylindrical battery as shown in Figure 1.

[0021] The components in the diagram are labeled as follows: 1. Battery; 2. Clamping plate; 3. Fixing sleeve; 4. Contact terminal; 5. Power line; 6. Voltage and temperature sensing line; 7. Support plate; 8. Stabilizer; 9. Pressure rod; 10. Pressure plate; 11. Elastic rope; 12. Pressure spring; 13. Rotary seat; 14. Rubber rod; 15. Housing; 16. Positioning rod; 17. Cross plate; 18. Rack; 19. Rubber collar. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0023] Please refer to Figures 1-3. An external short-circuit testing device for a cylindrical battery includes clamping plates 2 disposed at both ends of a battery 1. A fixing sleeve 3 is provided on the inner side of the clamping plates 2. The battery 1 is inserted into the fixing sleeve 3. A stabilizing component 8 is provided on the clamping plates 2 to hold the battery 1. A contact terminal 4 is provided inside the fixing sleeve 3. A power line 5 and a voltage and temperature sensing measurement line 6 connected to the contact terminal 4 are provided on the side of the clamping plates 2 away from the fixing sleeve 3. The fixing sleeve 3 restricts the position of the cylindrical battery 1, and the presence of the fixing sleeve 3 can better fix the battery 1. The stabilizing component 8 can stabilize and position the battery 1, facilitating subsequent short-circuit testing. The power line 5 with alligator clips can be easily connected to the testing equipment. The voltage and temperature sensing measurement line 6 can be directly connected to a multi-channel temperature measuring instrument, which can effectively monitor the voltage and temperature at both ends of the cylindrical battery 1, facilitating the failure analysis and research of the battery 1.

[0024] The side of the fixing sleeve 3 is provided with a support plate 7 installed on the clamping plate 2; the support plate 7 enhances the installation strength of the fixing sleeve 3 and prevents the fixing sleeve 3 from shifting or breaking when installing and fixing the battery 1.

[0025] The clamp 2 is a ceramic plate; it can serve as an insulator and is resistant to high temperatures.

[0026] The stabilizing component 8 is a pressure rod 9 set on the clamping plate 2. The fixing sleeve 3 is provided with a pressure plate 10, and a tension rope 11 is provided between the pressure plate 10 and the pressure rod 9. When the battery 1 is inserted into the fixing sleeve 3, the battery 1 moves relative to the pressure plate 10. The pressure plate 10 pulls the pressure rod 9 to rotate through the tension rope 11. The pressure rod 9 can abut against the surface of the battery 1. On the one hand, the circumferentially arranged pressure rod 9 can position the battery 1 so that the center of the battery 1 can be aligned with the center of the fixing sleeve 3 and can be connected to the contact terminal 4. On the other hand, when the tension rope 11 is tightened, it can pull the pressure rod 9 to abut against the battery 1, fix the battery 1 and reduce the possibility of loosening.

[0027] The contact terminal 4 is disposed on the pressure plate 10, and a pressure spring 12 is provided between the pressure plate 10 and the clamping plate 2; this enables good contact, and the contact terminal 4 can always abut against the positive and negative poles of the battery 1.

[0028] A rotating base 13 is bonded to the clamping plate 2, and the pressure rod 9 is hinged to the rotating base 13; the pressure rod 9 can be driven to rotate.

[0029] A rubber rod 14 is provided at the end of the pressure rod 9 away from the clamping plate 2; this can reduce the damage to the battery 1 when the pressure rod 9 presses on the battery 1.

[0030] The outer edge of the clamping plate 2 is provided with a housing 15, and a fixing member is provided between the housings 15. A positioning rod 16 is provided between the housings 15. The fixing member fixes the relative position of the two clamping plates 2 to prevent loosening during measurement. The positioning rod 16 is used to position the upper and lower clamping plates 2 to prevent offset and misalignment. The positioning rod 16 is provided on one clamping plate 2, and the positioning hole that cooperates with the positioning rod 16 is provided on the other clamping plate 2.

[0031] The fastener includes a cross plate 17 disposed on the outer casing 15, a toothed rack 18 that meshes with each other on the cross plate 17, and a rubber collar 19 disposed on the cross plate 17. The rubber collar 19 is fitted onto the two cross plates 17. The two toothed racks 18 mesh with each other to achieve a fixing effect, while the rubber collar 19 is used to prevent the two toothed racks 18 from separating.

[0032] Working principle: When a short-circuit test is required, insert battery 1 into the fixing sleeve 3 at one end, and place another clamping plate 2 and fixing sleeve 3 at the other end of battery 1. Battery 1 contacts the contact terminal 4 and aligns with the positioning rod 16. When the clamping plates 2 on both sides clamp battery 1, battery 1 pushes the pressure plate 10 to move within the fixing sleeve 3. The pressure plate 10 drives the tension rope 11 to pull the pressure rod 9 to rotate. The rubber rod 14 abuts against battery 1, serving to fix battery 1 on one hand, and the circumferentially arranged pressure rod 9 can push and position battery 1 in this way. This allows battery 1 to be aligned with contact terminal 4, improving measurement accuracy. While clamping the clamping plate 2, the two cross plates 17 are inserted into the rubber collar 19, and the racks 18 mesh with each other to complete the fixation, preventing the two clamping plates 2 from loosening and causing battery 1 to fail to be clamped. One end of the alligator clip power line 5 is fixed to the positive and negative terminals, and the other end of the alligator clip is connected to the short-circuit power line 5 connector of the short-circuit tester. The voltage / temperature measurement line can be directly connected to a multi-channel thermometer to monitor the voltage and temperature at both ends of the cylindrical battery 1 in real time, which is convenient for subsequent research.

[0033] The technical effects of this utility model are as follows: the position of the cylindrical battery 1 is restricted by the fixing sleeve 3, and the presence of the fixing sleeve 3 can better fix the battery 1, and the battery 1 can be stabilized and positioned by the stabilizer 8, which facilitates subsequent short circuit testing.

[0034] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A cylindrical battery external short circuit test device, characterized by: The device includes clamps (2) set at both ends of the battery (1), a fixing sleeve (3) is provided on the inner side of the clamps (2), the battery (1) is inserted into the fixing sleeve (3), a stabilizing member (8) for holding the battery (1) is provided on the clamps (2), a contact terminal (4) is provided in the fixing sleeve (3), and a power line (5) and a voltage and temperature sensing measurement line (6) connected to the contact terminal (4) are provided on the side of the clamps (2) away from the fixing sleeve (3).

2. The cylindrical battery external short-circuit test device according to claim 1, characterized in that: The side of the fixed sleeve (3) is provided with a support plate (7) installed on the clamp plate (2).

3. The cylindrical battery external short-circuit test device according to claim 1 or 2, characterized in that: The clamp (2) is a ceramic plate.

4. The cylindrical battery external short-circuit test device according to claim 1, characterized in that: The stabilizer (8) is a pressure bar (9) set on the clamp (2), and a pressure plate (10) is provided inside the fixing sleeve (3). A tension rope (11) is provided between the pressure plate (10) and the pressure bar (9).

5. The cylindrical battery external short-circuit test device according to claim 4, characterized in that: The contact terminal (4) is disposed on the pressure plate (10), and a pressure spring (12) is provided between the pressure plate (10) and the clamping plate (2).

6. The cylindrical battery external short-circuit test device according to claim 4, characterized in that: A rotating seat (13) is bonded to the clamp (2), and the pressure rod (9) is hinged to the rotating seat (13).

7. A cylindrical battery external short-circuit test device according to claim 4 or 6, characterized in that: The pressure bar (9) has a rubber rod (14) at the end away from the clamp (2).

8. The cylindrical battery external short-circuit test device according to claim 1, characterized in that: The outer edge of the clamp (2) is provided with a shell (15), a fixing member is provided between the shells (15), and a positioning rod (16) is provided between the shells (15).

9. The cylindrical battery external short-circuit test device according to claim 8, characterized in that: The fastener includes a cross plate (17) disposed on the outer shell (15), the cross plate (17) having meshing racks (18) and a rubber collar (19) disposed on the cross plate (17), the rubber collar (19) being fitted onto the two cross plates (17).

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