Improved battery pack testing device

Abstract

The utility model relates to the technical field of battery testing, in particular to an improved battery pack testing device, which comprises a testing box and a fixing seat fixedly mounted at the bottom of an inner cavity of the testing box and used for fixing a battery pack, a fixing plate is arranged in the testing box, and two groups of guide rods are connected to the side wall of an inner cavity of the fixing plate in a sliding manner; through the use of the driving assembly and the winding assembly, the impact piece on the fixing plate can freely fall to impact by means of the gravity of the impact piece, interference caused by the driving piece is avoided, the situation that the battery pack is collided and falls in actual use can be simulated more truly, and by matching with the guide rod, the fixing base and other assemblies, the battery pack can be fixed more stably. The impact piece can accurately fall to impact the battery pack, so that more accurate test data can be obtained, the test result can truly reflect the safety performance of the battery pack under the actual impact condition, and a more reliable basis is provided for the safety design and quality improvement of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and specifically to an improved battery pack testing device. Background Technology

[0002] Comprehensive testing is crucial during the research, development, production, and use of battery packs. Among the various tests, impact safety testing is a vital means of assessing battery pack safety. It simulates accidental impacts such as collisions and drops that battery packs may experience during actual use, detecting potential hazards like short circuits, fires, and explosions. This provides a basis for the safety design and quality improvement of battery packs. Currently, most common battery pack impact safety testing devices use cylinders, motors, or other drive components to move the impactor and complete the impact test. While this method achieves a certain degree of automation, these drive components cannot accurately simulate free-fall impacts in real-world environments. Due to the inherent characteristics of the drive components, additional forces and trajectory interference are applied to the impactor, resulting in differences in impact speed and force compared to actual free-fall impacts. This affects the accuracy of the test results and fails to truly reflect the safety performance of the battery pack under actual impact conditions.

[0003] In view of this, we propose an improved battery pack testing device. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this utility model provides an improved battery pack testing device. This device effectively solves the problem that existing technologies use motors, cylinders, or other driving components to move impact components to complete battery pack impact tests. However, these driving components apply additional forces and interfere with the movement trajectory of the impact components, causing the impact speed and force to differ from actual free-fall impacts. This results in inaccurate test results and fails to truly reflect the safety performance of the battery pack under actual impact conditions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides an improved battery pack testing device, including a test box and a fixing seat fixedly installed at the bottom of the inner cavity of the test box for fixing the battery pack;

[0007] The test chamber has a fixed plate inside. Two sets of guide rods are slidably connected to the inner cavity side wall of the fixed plate. Both ends of the two sets of guide rods are fixedly connected to the inner cavity side wall of the test chamber. A steel wire rope is fixedly connected to the top of the fixed plate. A winding assembly is provided at the end of the steel wire rope away from the fixed plate.

[0008] The winding assembly includes a positioning wheel, on which a drive assembly is provided for rotating and releasing the positioning wheel.

[0009] Furthermore, the winding assembly also includes a winding roller fixedly connected to one side of the positioning wheel, and a bracket is rotatably connected to the surface of the winding roller, the bracket being fixedly connected to the bottom of the inner cavity of the test chamber.

[0010] Furthermore, the surface of the take-up roller is fixedly connected to the end of the wire rope away from the fixed plate;

[0011] The test chamber also has two sets of guide wheels fixedly connected to the top of its inner cavity for guiding and traction of the wire rope.

[0012] Furthermore, the drive assembly includes an electric clamp for gripping the positioning wheel;

[0013] The positioning wheel also has annular grooves on both sides that correspond to the electric clamp.

[0014] Furthermore, a crank is fixedly connected to the top of the electric clamp, a fixed frame is rotatably connected to the surface of the crank, a control box is fixedly connected to the surface of the fixed frame, and one side of the control box is fixedly connected to the surface of the test box.

[0015] Furthermore, a motor is fixedly connected to the bottom of the inner cavity of the control box. The motor is fixedly connected to the end of the crank away from the electric clamp via an output shaft, and the output shaft of the motor and the center of the positioning wheel are on the same axis.

[0016] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0017] This invention, through the use of a drive assembly and a winding assembly, allows the impact component on the fixed plate to fall freely under its own weight, avoiding interference from the drive assembly. This more realistically simulates the situation of a battery pack being subjected to collisions and drops in actual use. In addition, with the guide rod and fixed base, it can ensure that the impact component falls accurately and impacts the battery pack, thereby obtaining more accurate test data. The test results can truly reflect the safety performance of the battery pack under actual impact conditions, providing a more reliable basis for the safety design and quality improvement of the battery pack. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first-view structural diagram of the present invention;

[0020] Figure 2 This is a partial cross-sectional structural diagram of the control box of this utility model;

[0021] Figure 3 This is a partial structural diagram of the positioning wheel and related components of this utility model;

[0022] Figure 4 This is a partial cross-sectional structural diagram of the test box of this utility model.

[0023] The labels in the diagram represent: 1. Test box; 2. Control box; 3. Fixture; 4. Guide rod; 5. Bracket; 6. Wire rope; 7. Fixing plate; 8. Take-up roller; 9. Positioning wheel; 10. Electric clamp; 11. Crank; 12. Motor; 13. Fixture frame; 14. Annular groove; 15. Guide wheel. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The present invention will be further described below with reference to the embodiments.

[0026] An improved battery pack testing device includes a test chamber 1 and a fixing seat 3 fixedly installed at the bottom of the inner cavity of the test chamber 1 for fixing the battery pack. The test chamber 1 is provided with a fixing plate 7. Two sets of guide rods 4 are slidably connected to the inner cavity side wall of the fixing plate 7. Both ends of the two sets of guide rods 4 are fixedly connected to the inner cavity side wall of the test chamber 1. A steel wire rope 6 is fixedly connected to the top of the fixing plate 7. A winding assembly is provided at the end of the steel wire rope 6 away from the fixing plate 7. The winding assembly includes a positioning wheel 9. A drive assembly is provided on the positioning wheel 9 for driving the positioning wheel 9 to rotate and releasing the positioning wheel 9.

[0027] Specifically, the fixed seat 3 inside the test box 1 can be used to position and fix the battery pack. The fixed plate 7 can be used to fix the impact component used for impact testing of the battery pack. The drive assembly can drive the positioning wheel 9 to rotate. With the help of other winding components, the impact component fixed on the fixed plate 7 can be lifted. When it rises to an appropriate height, the positioning wheel 9 can be released through the drive assembly. The impact component can complete free fall motion using its own gravity to complete the impact test on the battery pack on the fixed seat 3. The guide rod 4 can guide the impact component to accurately hit the battery pack when it falls. After the impact test is completed, the positioning wheel 9 can be driven to rotate again through the drive assembly. The wire rope 6 and other related winding components can lift the fixed plate 7 and the impact component to prepare for the second impact test.

[0028] Specifically, the winding assembly also includes a winding roller 8 fixedly connected to one side of the positioning wheel 9. A bracket 5 is rotatably connected to the surface of the winding roller 8. The bracket 5 is fixedly connected to the bottom of the inner cavity of the test chamber 1. The surface of the winding roller 8 is fixedly connected to the end of the wire rope 6 away from the fixed plate 7. Two sets of guide wheels 15 for guiding and traction of the wire rope 6 are also fixedly connected to the top of the inner cavity of the test chamber 1.

[0029] Furthermore, the drive assembly includes an electric clamp 10 for clamping the positioning wheel 9. The positioning wheel 9 has an annular groove 14 on both sides corresponding to the electric clamp 10. A crank 11 is fixedly connected to the top of the electric clamp 10. A fixed frame 13 is rotatably connected to the surface of the crank 11. A control box 2 is fixedly connected to the surface of the fixed frame 13. One side of the control box 2 is fixedly connected to the surface of the test box 1. A motor 12 is fixedly connected to the bottom of the inner cavity of the control box 2. The motor 12 is fixedly connected to the end of the crank 11 away from the electric clamp 10 through an output shaft. The output shaft of the motor 12 and the center of the positioning wheel 9 are on the same axis.

[0030] Specifically, the electric clamp 10 can clamp and fix the positioning wheel 9 into the annular groove 14 to achieve clamping and fixing of the positioning wheel 9. Then, the motor 12 is started, and the electric clamp 10 can be driven to rotate through the crank 11 on the fixed frame 13, thereby driving the positioning wheel 9 to rotate. At this time, the winding roller 8 on the bracket 5 can be driven to rotate. With the use of the guide wheel 15, the wire rope 6 can be wound up, and the fixed plate 7 and the impacting parts on the fixed plate 7 can be raised to the corresponding height.

[0031] Furthermore, when an impact test is required, the positioning wheel 9 can be released by the electric clamp 10. At this time, the impact component can fall quickly by the gravity of the impact component and the fixing plate 7, completing the free fall motion and conducting an impact test on the battery pack.

[0032] The working principle of this utility model is as follows: When conducting a battery pack impact test, the battery pack is first fixed on the fixing seat 3 at the bottom of the inner cavity of the test box 1, and the impact component used for the impact test is installed on the fixing plate 7.

[0033] When preparing to lift the impact component, start the motor 12 in the control box 2. Since the output shaft of the motor 12 and the center of the positioning wheel 9 are on the same axis, and the output shaft of the motor 12 is fixedly connected to the end of the crank 11 away from the electric clamp 10, the motor 12 drives the crank 11 to rotate. When the crank 11 rotates, the electric clamp 10 rotatably connected to its surface moves accordingly. At this time, the electric clamp 10 is in the state of clamping the annular grooves 14 on both sides of the positioning wheel 9, and the electric clamp 10 drives the positioning wheel 9 to rotate.

[0034] The positioning wheel 9 is fixedly connected to the winding roller 8 on one side. The surface of the winding roller 8 is rotatably connected to the bracket 5. The bracket 5 is fixed to the bottom of the inner cavity of the test box 1. The rotation of the positioning wheel 9 drives the winding roller 8 to rotate synchronously. Two sets of guide wheels 15 are fixed to the top of the inner cavity of the test box 1. One end of the wire rope 6 is fixed to the surface of the winding roller 8, and the other end is connected to the fixing plate 7. The winding roller 8 rotates to wind up the wire rope 6. Under the guiding and traction action of the guide wheel 15, the wire rope 6 drives the fixing plate 7 to slide upward along the guide rod 4, thereby lifting the fixing plate 7 and the impacting parts on it to a suitable height.

[0035] When the impactor reaches the predetermined height and is ready for impact testing, the electric clamp 10 releases its grip on the positioning wheel 9. At this time, the fixed plate 7 and the impactor fall freely along the guide rod 4 under their own gravity. Since the guide rod 4 guides the fixed plate 7, it ensures that the impactor can accurately impact the battery pack on the fixed seat 3 and complete an impact test.

[0036] Throughout the entire process, the electric clamp 10 is driven by electromagnetic force to cause the gripper to retract inward and tightly embed into the annular groove 14, thereby achieving a firm gripping of the positioning wheel 9. An electromagnetic relay is connected to the control circuit of the electric clamp 10. When the electric clamp 10 completes the gripping of the positioning wheel 9, the relay is energized to generate electromagnetic force, causing the armature to engage and lock the drive circuit. The linkage structure also locks the output shaft of the drive component, achieving self-locking. When it is necessary to release the positioning wheel 9, the relay power is cut off, the electromagnetic force disappears, the armature resets and unlocks, and the drive component can reverse to drive the electric clamp 10 to release the positioning wheel 9.

[0037] After the impact test is completed, the electric clamp 10 is re-clamped onto the positioning wheel 9, and the motor 12 is restarted to rotate forward. The above operation procedure of lifting the impact component is repeated to prepare for the next impact test. This cycle can be repeated to perform multiple impact tests on the battery pack to test the performance of the battery pack when it is impacted.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. An improved battery pack testing device, characterized in that, include: Test box (1), and a fixing seat (3) fixedly installed at the bottom of the inner cavity of the test box (1) for fixing the battery pack; The test chamber (1) is equipped with a fixed plate (7). Two sets of guide rods (4) are slidably connected to the inner cavity side wall of the fixed plate (7). Both ends of the two sets of guide rods (4) are fixedly connected to the inner cavity side wall of the test chamber (1). A steel wire rope (6) is fixedly connected to the top of the fixed plate (7). A winding assembly is provided at the end of the steel wire rope (6) away from the fixed plate (7). The winding assembly includes a positioning wheel (9), and the positioning wheel (9) is provided with a drive assembly for rotating the positioning wheel (9) and releasing the positioning wheel (9); The winding assembly also includes a winding roller (8) fixedly connected to one side of the positioning wheel (9), and a bracket (5) is rotatably connected to the surface of the winding roller (8), and the bracket (5) is fixedly connected to the bottom of the inner cavity of the test chamber (1); The surface of the take-up roller (8) is fixedly connected to the end of the wire rope (6) away from the fixed plate (7); Among them, the top of the inner cavity of the test box (1) is also fixedly connected with two sets of guide wheels (15) for guiding and traction of the wire rope (6). The drive assembly includes an electric clamp (10) for clamping the positioning wheel (9); Among them, the positioning wheel (9) is provided with annular grooves (14) on both sides corresponding to the electric clamp (10).

2. The improved battery pack testing device according to claim 1, characterized in that, The top of the electric clamp (10) is fixedly connected to a crank (11), the surface of the crank (11) is rotatably connected to a fixed frame (13), the surface of the fixed frame (13) is fixedly connected to a control box (2), and one side of the control box (2) is fixedly connected to the surface of the test box (1).

3. The improved battery pack testing device according to claim 2, characterized in that, A motor (12) is fixedly connected to the bottom of the inner cavity of the control box (2). The motor (12) is fixedly connected to the end of the crank (11) away from the electric clamp (10) through the output shaft, and the output shaft of the motor (12) and the center of the positioning wheel (9) are on the same axis.

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