Dynamic impact test system for bottom of power battery

Abstract

The utility model provides a dynamic impact test system for the bottom of a power battery, which comprises an electric servo spring loading device and a traveling mechanism, and the electric servo spring loading device is arranged on the traveling mechanism. The electric servo spring loading device is used for providing vertically upward loading energy required by a test for the power battery, the electric servo spring loading device comprises an impact rod, and the top end of the impact rod is provided with an impact head; and the walking mechanism drives the electric servo spring loading device to move. The dynamic impact test system for the bottom of the power battery has the beneficial effects that the electric servo spring loading device is arranged on the walking mechanism, and after the battery is tested by utilizing the electric servo spring loading device, the whole device is timely withdrawn to a safe position by utilizing the walking mechanism, so that the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical structure field especially is concerned with a power battery bottom dynamic impact test system BACKGROUND

[0002] With the rapid development of science and technology, new energy vehicles have gradually become an important choice for our daily travel. New energy vehicles are leading the green development of the automobile industry with their environmental protection and energy saving advantages.

[0003] However, the safety of new energy vehicle batteries is still the focus of the industry. As the source of vehicle energy, the safety of power batteries is directly related to the safety of passengers' life and property. In order to ensure the safety of power batteries, various performance tests of batteries are essential, and the bottom dynamic impact test is a key test item to ensure that the battery can still work normally when subjected to external impact.

[0004] At present, the traditional power battery bottom impact test usually relies on manual operation for loading, and the staff need to directly participate in the battery pack puncture and other equipment operation during the experiment. This method has a high safety hazard, especially if the staff cannot be removed in time during the test process, which may cause an accident. At the same time, the existing part of the power battery bottom impact / puncture test has a high risk of battery pack spontaneous combustion after the test, and the impact / puncture test equipment needs to be removed / moved out in time for protection.

[0005] Therefore, an experimental system is needed to replace manual operation, automatically complete the puncture test, and quickly remove it after the test to improve safety and ensure the reliability of the test process. UTILITY MODEL CONTENT

[0006] Therefore, the utility model aims at providing a power battery bottom dynamic impact test system to solve at least one problem in the background art.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0008] The power battery bottom dynamic impact test system comprises an electric servo spring loading device and a walking mechanism, and the electric servo spring loading device is arranged on the walking mechanism;

[0009] The electric servo spring loading device is used to provide the required vertical upward loading energy for the power battery, and the electric servo spring loading device comprises an impact rod, and the impact rod top end is provided with an impact head, and the impact head comprises a tungsten steel needle;

[0010] The walking mechanism drives the electric servo spring loading device to move.

[0011] Further, the electric servo spring loading device comprises a support frame arranged on the bottom, a track mounting frame vertically arranged in the support frame, and two tracks fixed on the inner side of the track mounting frame;

[0012] The impact rod is mounted on the track through the first linear bearings on the left and right sides.

[0013] Further, on the front and back sides of the impact rod, a rack is arranged on one side, and a counterweight is arranged on the other side; and a spring pressing seat is further arranged on the upper end of the impact rod on the side of the counterweight.

[0014] Further, an insurance pin sleeve is arranged on the support frame, an insurance pin is arranged in the sleeve, and the tail end of the insurance pin is connected with an electric push rod of the insurance pin;

[0015] Further, a first servo motor is arranged on the support frame, and the power output end of the first servo motor is connected with a shaft gear through a shaft coupling.

[0016] Further, a guide rod is arranged on one side of the track mounting frame, the bottom and the top of the guide rod are connected with the track mounting frame, and a spring is sleeved on the guide rod;

[0017] Further, a linear guide rail is further arranged on the track mounting frame, and an electric cylinder is arranged on the bottom of one side of the track mounting frame; the power output end of the electric cylinder is connected with a lifting block, the lifting block is provided with a corresponding sliding block structure on the side facing the linear guide rail; and the lifting block is arranged below the first linear bearing.

[0018] Further, four guide columns and support seats are arranged on the support frame, and the guide columns and the support seats are detachably connected with the walking mechanism.

[0019] Further, the walking mechanism comprises a roller fixing plate, a second servo motor, a speed reducer, a driving roller, a driven roller, a chain, four second linear bearings, and four support cylinders.

[0020] The walking mechanism is sleeved on the guide column through the second linear bearing;

[0021] The roller fixing plate is arranged on the two sides of the walking mechanism, and the driving roller and the driven roller are arranged on the outer side of the roller fixing plate;

[0022] The second servo motor and the speed reducer are arranged on the inner side of the roller fixing plate, the second servo motor drives the speed reducer to rotate the driving roller;

[0023] The driving roller drives the driven roller on the same side to rotate synchronously through the chain.

[0024] Further, the safety protection device comprises a sealing structure with a through hole on the outer top, and the safety protection device is arranged outside the dynamic impact test system of the power battery.

[0025] The power battery bottom dynamic impact test system has the following beneficial effects relative to the prior art:

[0026] The utility model proposes a kind of dynamic power battery bottom dynamic impact test system, electric servo spring loading device is set on walking mechanism, after the test to battery is completed using electric servo spring loading device, using walking mechanism and timely the whole device is withdrawn to safe position, improve security; DRAWINGS

[0027] The drawings that form part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its description are used to explain the utility model, and do not constitute undue limitation on the utility model.In the drawings:

[0028] Figure 1 The power battery bottom dynamic impact test system working state position schematic view described in the utility model embodiment;

[0029] Figure 2 The first three-dimensional structure schematic view described in the utility model embodiment;

[0030] Figure 3 The second three-dimensional structure schematic view described in the utility model embodiment;

[0031] Figure 4 The third three-dimensional structure schematic view described in the utility model embodiment.

[0032] Drawing mark explanation:

[0033] 1-electric servo spring loading device;101-support frame;102-rail mounting bracket;103-rail;104-impact rod;105-first linear bearing;106-rack;107-counterweight;108-impact head;109-spring pressure seat;110-safety pin sleeve;111-safety pin;112-safety pin electric push rod;113-first servo motor;114-coupling;115-axle gear;116-guide rod;117-spring;118-non-contact displacement sensor;119-induction magnetic sheet;120-linear guide rail;121-electric cylinder;1210-lifting block;122-guide column;123-support seat;2-walking mechanism;201-roller fixed plate;202-second servo motor;203-reducer;204-driving roller;205-driven roller;206-chain;207-second linear bearing;208-support electric cylinder;3-safety protection device. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0035] The utility model discloses below will refer to the drawing and combine the embodiment to explain in detail.

[0036] The utility model discloses a kind of power battery bottom dynamic impact test system, the meaning of "dynamic" in it is that electric servo spring loading device can be moved using walking mechanism, for example, it is prepared test using walking mechanism to move to the lower of the power battery to be tested, it is withdrawn from the lower of the power battery after puncture etc.

[0037] In the specific implementation process of the present scheme, the steps are as follows:

[0038] (1) the loading point at the bottom of the power battery to be tested is first marked with a marker pen;

[0039] (2) the power battery is supported and fixed on the ground or test platform through four struts, and a suitable space is left for the power battery bottom dynamic impact test system;

[0040] (3) the power battery bottom dynamic impact test system is moved to the lower of the power battery through the remote controller, so that the center of the impact head 108 coincides with the loading point;

[0041] (4) the support cylinder 208 is extended downward, the bottom surface of the support frame 101 is in contact with the ground or test platform, the walking mechanism 2 is lifted, and the driving roller 204 and the driven roller 205 are separated from the ground;

[0042] (5) the electric cylinder 121 is controlled to extend upward through the remote controller, the lifting block 1210 provided at the power output end of the electric cylinder 121 is used to lift the first linear bearing 105 upward, and then the impact rod 104 is slowly pushed upward, so that the impact head 108 is extended upward until the top end of the impact head 108 contacts the loading point of the power battery. By pre-lifting the impact head 108, it is verified whether the center of the impact head 108 coincides with the loading point to be impacted.

[0043] Preferably, in another embodiment, the above process (5) can also be configured with a non-contact displacement sensor 118 in the system as follows: Figure 3 As shown in the figure, the non-contact displacement sensor 118 and the induction magnetic sheet 119 are configured in the device. During the movement of the impact rod 104, the induction magnetic sheet 119 also moves upward along the non-contact displacement sensor 118. When the top end of the impact head 108 contacts the loading point of the power battery, the computer records the current position of the impact head 108.

[0044] (6) After the above verification process is completed, the electric cylinder 121 slowly falls to the lowermost position (the lifting block 1210 is used to lift from below, and the electric cylinder 121 is used to slowly move downward to avoid damage to the gear caused by the direct falling of the rack), until the rack 106 on the impact rod 104 is engaged with the shaft gear 115. The above falling process can be achieved by relying on the gravity provided by the impact rod 104 and the counterweight block 107. In actual use, the number of counterweight blocks 107 is adjusted to meet the actual needs;

[0045] (7) After the above process is completed, the test is started, the first servo motor 113 controls the shaft gear 115 to rotate to drive the rack 106 to move downward, and then the spring compression seat 109 on the impact rod 104 compresses the spring 117 to a compression length corresponding to the impact energy. Then the computer controls the first servo motor 113 to drive the rack 106 and the impact rod 104, and then drives the impact head 108 to impact the bottom of the power battery upward, during which the spring 117 returns. The first servo motor 113 and the spring 117 simultaneously complete the driving of the impact head 108. During the process, the first servo motor 113 also controls the impact speed of the impact head 108 to the position (in another embodiment, when the non-contact displacement sensor 118 detects that the top end of the impact head 108 reaches the impact point, the safety pin 111 is pushed out by the electric push rod, and after the impact is completed, the bottom of the rack 106 falls on the safety pin 111 to prevent the rack 106 from falling on the shaft gear 115 to cause impact damage to the gear) ;

[0046] After the loading is completed, the supporting cylinder 208 is retracted upward until the bottom surface of the supporting frame 101 is separated from the ground or the test platform, and then the walking mechanism 2 starts to work. The loading system quickly retreats from the danger zone according to the set direction and distance. If the power battery smokes or catches fire during the test, the test personnel can manually click the quick stop test on the control cabinet after monitoring by the image visual system. The loading system will work according to the above steps after the loading is completed, and finally the loading system will quickly retreat from the danger zone.

[0047] In summary, the power battery bottom dynamic impact test system can be widely applied to the bottom dynamic impact loading test of the power battery. If the power battery smokes or catches fire during the test, the intelligent loading test system can quickly retreat from the danger zone through the walking mechanism 2 to ensure the safety of the equipment of the intelligent loading test system.

[0048] When the walking mechanism 2 walks, the supporting cylinder 208 is retracted upward to make the bottom surface of the supporting frame 101 separate from the ground. When the loading is performed, the supporting cylinder 208 is extended downward by a distance to make the bottom surface of the supporting frame 101 contact with the ground, and then the loading is performed, so as to avoid the stress on the walking mechanism 2.

[0049] The walking mechanism 2 of the scheme is 4-wheel drive on each side, realizes straight walking and steering, and is still easy to walk when crossing a trench and a flat road surface with a pit.

[0050] The safety protection device 3 of the scheme is made of a stainless steel plate and surrounds the intelligent loading test system except the bottom surface, and the inside is covered with fire-resistant and high-temperature-resistant materials, thereby playing multiple protection roles such as fireproofing, waterproofing, and high-temperature resistance.

[0051] Meanwhile, the mounting mode of the support frame 101 and the walking mechanism 2 is as follows: first, the guide column 122 on the support frame 101 is screwed off from the support frame 101, passes through the opening of the second linear bearing 207 on the walking mechanism 2, and is screwed on the support frame 101 again (the bottom of the guide column 122 has an external thread structure, and the support frame 101 is provided with a corresponding threaded hole), thereby realizing the relative fixation of the support frame 101 and the support frame 101 in the horizontal direction; meanwhile, the support frame 101 is provided with a support seat 123, as shown in the drawing, the support seat 123 has a latch structure, the latch is pulled out, and then is inserted into the opening of the corresponding part of the side plate of the support frame 101 (the opening is not marked in the drawing, Figure 3 the latch is inserted again, and auxiliary fixation is realized. Figure 4

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should be covered in the scope of the claims and the specification of the utility model.

[0053] The above is only a preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.​

Claims

1. A dynamic impact test system for a power cell bottom, characterized in that, Including electric servo spring loading device (1) and walking mechanism (2), electric servo spring loading device (1) is arranged on walking mechanism (2); The electric servo spring loading device (1) is used to provide the test required vertical upward loading energy for the power battery, and the electric servo spring loading device (1) comprises an impact rod (104), and the impact rod (104) top end installs impact head (108); Through the walking mechanism (2) drive electric servo spring loading device (1) movement.

2. The power battery bottom dynamic impact test system according to claim 1, characterized in that: Electric servo spring loading device (1) includes support frame (101) arranged at the bottom, vertical track mounting bracket (102) is arranged in support frame (101), two tracks (103) are fixed on the inner side of track mounting bracket (102); Impact rod (104) is installed on track (103) through first linear bearing (105) on left and right sides.

3. The power battery bottom dynamic impact test system according to claim 2, characterized in that: Impact rod (104) is installed on the left and right sides, one side installs rack (106), the other side installs counterweight (107); the upper end of impact rod (104) on the side of installing counterweight (107) is also installed spring pressure seat (109).

4. The power battery bottom dynamic impact test system according to claim 2, characterized in that: Safety pin sleeve (110) is installed on support frame (101), safety pin (111) is installed in sleeve, tail end of safety pin (111) is connected with safety pin electric push rod (112).

5. The power battery bottom dynamic impact test system according to claim 2, characterized in that: First servo motor (113) is arranged on support frame (101), power output end of first servo motor (113) is connected with shaft gear (115) through shaft coupling (114).

6. The power battery bottom dynamic impact test system according to claim 2, characterized in that: Guide rod (116) is arranged on one side of track mounting bracket (102), guide rod (116) bottom and top are connected with track mounting bracket (102), spring (117) is sleeved on guide rod (116).

7. The power battery bottom dynamic impact test system according to claim 2, characterized in that: Linear guide rail (120) is also installed on track mounting bracket (102), electric cylinder (121) is installed on the bottom of one side of track mounting bracket (102); power output end of electric cylinder (121) is connected with lifting block (1210), lifting block (1210) is provided with corresponding sliding block structure on the side of linear guide rail (120); lifting block is arranged below first linear bearing (105).

8. The power battery bottom dynamic impact test system according to claim 2, characterized in that: Support frame (101) is provided with four guide columns (122) and support seats (123), and the guide columns (122) and the support seats (123) are detachably connected with the walking mechanism (2).

9. The power battery bottom dynamic impact test system according to claim 8, characterized in that: Walking mechanism (2) includes roller fixing plate (201), second servo motor (202), speed reducer (203), driving roller (204), driven roller (205) and chain (206), four second linear bearings (207), four support cylinders (208); Walking mechanism (2) is sleeved on guide column (122) through second linear bearing (207); Roller fixing plate (201) is arranged on both sides of walking mechanism (2), and driving roller (204) and driven roller (205) are installed on the outer side of roller fixing plate (201); Second servo motor (202) and speed reducer (203) are installed on the inner side of roller fixing plate (201), second servo motor (202) drives speed reducer (203) to drive driving roller (204) to rotate; The driving roller (204) drives the driven roller (205) on the same side to rotate synchronously through a chain (206).

10. The power battery bottom dynamic impact test system of claim 1, wherein: The application relates to a safety protection device (3) which is provided with a sealing structure with a through hole on the upper side, and covers the outside of a dynamic impact test system of a power battery.

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