Zero-drop test bench for power battery

Abstract

The invention relates to a power battery zero-drop test bench which comprises a mounting bottom plate, a rack and a control cabinet, the rack comprises a first stand column and a second stand column which are the same in structure, a lifting guide mechanism, a lifting mechanism, a drop mechanism and a secondary impact prevention mechanism are mounted in the first stand column, and the drop mechanism is arranged in the lifting guide mechanism. The falling mechanism is connected with the lifting mechanism, a secondary impact preventing mechanism is arranged at the lower end of the falling mechanism, the falling mechanism is provided with an auxiliary supporting frame, the auxiliary supporting frame is provided with a limiting piece, an E-shaped fork is arranged at the lower end of the secondary impact preventing mechanism, the E-shaped fork is provided with a transverse supporting plate, a falling bottom plate is arranged on the upper end face of the mounting bottom plate, and a falling avoiding groove is formed in the falling bottom plate; the first stand column and the second stand column which are the same in structure are integrated with a function module for a drop test, the test battery is prevented from inclining due to asynchronism, it is guaranteed that the test battery is only subjected to one-time real free fall impact, and the drop test of the power battery with the weight of 500 kg or even 1000 kg or above of L2000xD1500x H500mm is met.

Description

Technical Field

[0001] This invention relates to the field of power battery testing equipment technology, and in particular to a power battery zero-drop test bench. Background Technology

[0002] With the rapid development of the new energy vehicle and energy storage industries, the safety performance of power batteries, as core components, is of paramount importance. Drop testing is a key experimental method that simulates accidental drops during transportation, installation, and use of batteries to verify their mechanical structural integrity and internal safety. The "zero-drop" test, in particular, can withstand drops from various heights ranging from 0mm to 2000mm, and the E-shaped fork must land before the test sample.

[0003] Most drop test benches currently on the market have a single-arm structure, which cannot meet the drop test requirements of power batteries with dimensions of L2000xD1500xH500mm and a weight of 500kg or even over 1000kg, because the structural strength and dimensions of a single arm are insufficient. Even with a double-column structure, the arm opening method can lead to asynchronous operation on both sides, causing the power battery to land on one side first during a drop, resulting in a drop angle greater than the national standard requirements and very poor test consistency. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a zero-drop test bench for power batteries. This solves the problem that most existing drop test benches are single-arm structures, which cannot meet the drop test requirements of power batteries with a length of L2000xD1500 x H500mm and a weight of 500kg or even over 1000kg, because the structural strength and dimensions of a single arm are insufficient. Even with a double-column structure, the arm opening method can lead to asynchronous operation on both sides, causing the power battery to land on one side first during a drop, resulting in a drop angle greater than the national standard requirements and very poor test result consistency.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides a zero-drop test bench for power batteries, including a mounting base, a frame, and a control cabinet. The frame includes a first column and a second column, which are respectively disposed on both sides of the mounting base. The control cabinet is located adjacent to the frame. A lifting guide mechanism, a lifting mechanism, a drop mechanism, and a secondary impact protection mechanism are installed in the first column. The drop mechanism is disposed in the lifting guide mechanism and the two are connected by a linear bearing. The drop mechanism is connected to the lifting mechanism. The lower end of the drop mechanism is provided with a secondary impact protection mechanism, and the upper end of the drop mechanism is provided with an auxiliary support frame. The auxiliary support frame is provided with a limiting member. The lower end of the secondary impact protection mechanism is provided with an E-shaped fork, and the E-shaped fork is provided with a transverse support plate. The upper surface of the mounting base is provided with a drop base plate, and the drop base plate is provided with drop avoidance grooves on both sides. During a drop, the transverse support plate of the E-shaped fork is adapted to the drop avoidance groove. The first column and the second column have the same structure.

[0009] Preferably, the front end of the frame is provided with a photoelectric safety protection device, which is located in front of the first column and the second column.

[0010] Preferably, the lifting guide mechanism includes four lifting guide rods.

[0011] Preferably, the lifting mechanism includes a servo motor, a planetary reducer, and a ball screw, with the output end of the servo motor connected to the ball screw via the planetary reducer.

[0012] Preferably, the auxiliary support frame further includes a longitudinal long rod, a transverse long rod, a first connecting block, a second connecting block, and an adjusting block. The longitudinal long rod is connected to the drop mechanism through the first connecting block, the transverse long rod is connected to the longitudinal long rod through the second connecting block, the adjusting block is disposed on the transverse long rod, and the limiting member is installed on the adjusting block.

[0013] Preferably, the thickness of the transverse support plate is less than 5 mm than the depth of the drop avoidance groove.

[0014] Preferably, the anti-secondary impact mechanism is a hydraulic damper.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this invention are as follows: The zero-drop test bench for power batteries of this invention integrates the drop test functional module with the first and second columns having the same structure. The lifting guide mechanism, in conjunction with the lifting mechanism, provides precise guidance for the lifting process. During the drop test, the drop mechanism, with the cooperation of the lifting guide mechanism and the double E-shaped fork, ensures that the test battery will not tilt due to asynchrony during the drop movement on both sides. In addition, combined with the anti-secondary impact mechanism, it ensures that the test battery is subjected to only one real free fall impact. This structure can meet the drop test requirements of power batteries with a length of L2000 x D1500 x H500mm and a weight of 500kg or even 1000kg or more. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of the zero-drop test bench for power batteries in an embodiment of the present invention;

[0018] Figure 2 This is a perspective view of the first column of the zero-drop test bench for power batteries in an embodiment of the present invention;

[0019] Figure 3 This is a connection structure diagram of the drop mechanism and the anti-secondary impact mechanism of the power battery zero-drop test bench in an embodiment of the present invention.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1. Mounting base plate; 2. Drop plate; 20. Drop clearance groove; 3. Frame; 30. First column; 4. Lifting guide mechanism; 5. Lifting guide rod; 6. Lifting mechanism; 61. Servo motor; 62. Planetary reducer; 63. Ball screw; 7. Drop mechanism; 8. Anti-secondary impact mechanism; 9. E-shaped fork; 10. Horizontal support plate; 11. Second column; 12. Control cabinet; 13. Auxiliary support frame; 131. Longitudinal rod; 132. Horizontal rod; 133. First connecting block; 134. Second connecting block; 135. Adjusting block; 136. Limiting component; 14. Photoelectric safety protection device; 15. Warning light; 16. Test sample. Detailed Implementation

[0022] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0023] Please see Figures 1 to 3This invention provides a zero-drop test bench for power batteries, comprising a mounting base 1, a frame 3, and a control cabinet 12. The frame 3 includes a first column 30 and a second column 11, which are respectively disposed on both sides of the mounting base 1 to form a high-rigidity support frame. The control cabinet 12 is located adjacent to the frame 3, and the two adopt a split design, keeping the operator away from the test area and improving safety. The first column 30 integrates a lifting guide mechanism 4, a lifting mechanism 6, a drop mechanism 7, and a secondary impact protection mechanism 8, optimizing the space utilization of the equipment through a compact layout. The drop mechanism 7 is disposed within the lifting guide mechanism 4, and the two are connected by a linear bearing to ensure precise guidance and low-friction smoothness of vertical movement. The drop mechanism 7 is connected to the lifting mechanism 6 to achieve precise and controllable height adjustment, and a secondary impact protection mechanism is provided at the lower end of the drop mechanism 7. The structure 8 is used to absorb impact energy and suppress rebound. The upper end of the drop mechanism 7 is provided with an auxiliary support frame 13 to enhance the overall structural stability. The auxiliary support frame 13 is provided with a limiting member 136 to accurately limit the position of the test sample 16. The lower end of the anti-secondary impact mechanism 8 is provided with an E-shaped fork 9 to achieve reliable support and rapid release of the test sample 16. The E-shaped fork 9 is provided with a transverse support plate 10 to provide uniform support force. The upper surface of the mounting base plate 1 is provided with a drop base plate 2 to bear the impact load. The drop base plate 2 is provided with drop avoidance grooves 20 on both sides to achieve an unobstructed drop path. During the drop, the transverse support plate 10 of the E-shaped fork 9 and the drop avoidance groove 20 are adapted to ensure that the test area is completely avoided after release. The first column 30 and the second column 11 have the same structure to simplify the manufacturing and maintenance process and can be used alone or simultaneously according to the test needs.

[0024] In a preferred embodiment, a photoelectric safety protection device 14 is provided at the front end of the frame 3. The photoelectric safety protection device 14 is located in front of the first column 30 and the second column 11 to form a non-contact safety protection area, and is equipped with a warning light 15 to remind surrounding personnel to stay away from the test area during testing.

[0025] In a preferred embodiment, the lifting guide mechanism 4 includes four lifting guide rods 5. The four-column guide structure significantly improves the anti-eccentric load capacity and operational stability during the lifting process.

[0026] In a preferred embodiment, the lifting mechanism 6 includes a servo motor 61, a planetary reducer 62, and a ball screw 63. The output end of the servo motor 61 is connected to the ball screw 63 through the planetary reducer 62 to achieve high-precision height positioning and smooth power transmission.

[0027] In a preferred embodiment, the auxiliary support frame 13 further includes a longitudinal long rod 131, a transverse long rod 132, a first connecting block 133, a second connecting block 134, and an adjusting block 135. The longitudinal long rod 131 is connected to the drop mechanism 7 through the first connecting block 133 to achieve rigid support. The transverse long rod 132 is connected to the longitudinal long rod 131 through the second connecting block 134 to form an adaptive support frame. The adjusting block 135 is set on the transverse long rod 132 to achieve flexible position adjustment. The number of adjusting blocks 135 can be adjusted as needed. The limiting member 136 is installed on the adjusting block 135 to provide an adjustable limiting function, which can be adjusted according to the width and height of the dropped sample.

[0028] In a preferred embodiment, the thickness of the transverse support plate 10 is 5mm less than the depth of the drop avoidance groove 20, ensuring complete avoidance of the impact area during release and eliminating the risk of interference.

[0029] In a preferred embodiment, the anti-secondary impact mechanism 8 is a hydraulic buffer. In addition, it should be noted that the drop mechanism 7 is a pneumatic release mechanism in the prior art. In this application, the pneumatic release mechanism can be of the type of wedge block, gripper, or hook.

[0030] In summary, the zero-drop test bench for power batteries of the present invention integrates the functional modules for drop testing through a first column and a second column with identical structures. The lifting guide mechanism, in conjunction with the lifting mechanism, provides precise guidance for the lifting process. During the drop test, the drop mechanism, with the cooperation of the lifting guide mechanism and the double E-shaped fork, ensures that the test battery will not tilt due to asynchrony during the drop movement on both sides. Furthermore, combined with the anti-secondary impact mechanism, it ensures that the test battery is subjected to only one real free-fall impact. This structure can meet the drop test requirements of power batteries with a length of L2000 x D1500 x H500mm and a weight of 500kg or even 1000kg or more.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art should not make changes, modifications, substitutions, or variations to the above embodiments within the scope of the present invention.

Claims

1. A zero-drop test bench for power batteries, comprising a mounting base, a frame, and a control cabinet, wherein the frame includes a first column and a second column, the first column and the second column being respectively disposed on both sides of the mounting base, the control cabinet being located adjacent to the frame, a lifting guide mechanism, a lifting mechanism, a drop mechanism, and a secondary impact protection mechanism are installed in the first column, the drop mechanism is disposed within the lifting guide mechanism and the two are connected by a linear bearing, the drop mechanism is connected to the lifting mechanism, and the lower end of the drop mechanism is provided with a secondary impact protection mechanism, characterized in that: The upper end of the drop mechanism is provided with an auxiliary support frame, and the auxiliary support frame is provided with a limiting member. The lower end of the anti-secondary impact mechanism is provided with an E-shaped fork, and the E-shaped fork is provided with a transverse support plate. The upper surface of the mounting base plate is provided with a drop base plate, and the drop base plate is provided with drop avoidance grooves on both sides. During a drop, the transverse support plate of the E-shaped fork is adapted to the drop avoidance groove. The first column and the second column have the same structure.

2. The power battery zero-drop test bench as described in claim 1, characterized in that: The front end of the frame is equipped with a photoelectric safety protection device, which is located in front of the first column and the second column.

3. The zero-drop test bench for power batteries as described in claim 1, characterized in that: The lifting guide mechanism includes four lifting guide rods.

4. The power battery zero-drop test bench as described in claim 1, characterized in that: The lifting mechanism includes a servo motor, a planetary reducer, and a ball screw. The output end of the servo motor is connected to the ball screw through the planetary reducer.

5. The zero-drop test bench for power batteries as described in claim 1, characterized in that: The auxiliary support frame also includes a longitudinal long rod, a transverse long rod, a first connecting block, a second connecting block, and an adjusting block. The longitudinal long rod is connected to the drop mechanism through the first connecting block, the transverse long rod is connected to the longitudinal long rod through the second connecting block, the adjusting block is disposed on the transverse long rod, and the limiting member is installed on the adjusting block.

6. The zero-drop test bench for power batteries as described in claim 1, characterized in that: The thickness of the transverse support plate is less than the depth of the drop avoidance groove by 5 mm.

7. The zero-drop test bench for power batteries as described in claim 1, characterized in that: The anti-secondary impact mechanism is a hydraulic buffer.

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