Battery pack testing device based on multi-size fixing mechanism

Abstract

The present application relates to the technical field of battery test, especially to a battery pack test device based on a multi-size fixing mechanism, which comprises a test frame for impact test, characterized in that: the bottom corners of the test frame are provided with retractable legs for lifting and lowering the test frame, and the bottom corners of the test frame are provided with universal wheels; the upper end of the test frame is provided with a data receiving mechanism configured for battery clamping and data receiving; the upper end of the test frame is provided with an impact mechanism configured for providing power for battery impact test; the data receiving mechanism is provided with a battery fixing mechanism configured for limiting different sizes of batteries; the diameter and length of different dry batteries can be adjusted to ensure optimal accommodation and fixation for facilitating impact test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery testing, in particular to a battery pack testing device based on a multi-size fixing mechanism. BACKGROUND

[0002] Energy storage batteries mainly refer to batteries used for solar power generation equipment, wind power generation equipment and renewable energy storage energy. A battery refers to a cup, a groove or other container or part of a composite container containing an electrolyte solution and a metal electrode to generate current, which can convert chemical energy into electrical energy. It has positive and negative poles. With the progress of science and technology, batteries refer to small devices that can generate electricity. Such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using a battery as a source of energy can obtain a current with stable voltage, stable current, long-term stable power supply and little influence from the outside world. Lithium iron phosphate is a lithium ion battery electrode material, mainly used in various lithium ion batteries, and the battery needs to be integrated by a supporting structure.

[0003] After searching, patent publication No. CN106323577B discloses a battery pack impact testing device, which includes a collision barrier for placing a battery pack, a moving slide table with an impact head, a hydraulic power device for pushing the moving slide table to slide, and a monitoring device in communication connection with a sensor inside the battery pack. The moving slide table is located between the hydraulic power device and the collision barrier, and the impact head of the moving slide table is directed to the support assembly on the side of the collision barrier where the battery pack is placed. The monitoring device controls the start and stop of the hydraulic power device. It also includes a solution pool located directly below the support assembly for extinguishing the battery pack, and the monitoring device also controls the support assembly to release the battery pack to fall into the solution pool. The present application solves the problem of extinguishing the battery pack during impact testing in the prior art.

[0004] The battery pack detection structure in the prior art has a single limiting function for the battery, and cannot effectively limit different sizes of batteries in the battery pack. SUMMARY

[0005] The present application aims to provide a battery pack testing device based on a multi-size fixing mechanism to solve the problems raised in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a battery pack testing device based on a multi-size fixing mechanism, the battery pack testing device comprises a testing frame for impact testing, four corners of the bottom of the testing frame are provided with retractable legs for lifting and lowering the testing frame, and universal wheels are arranged at the four corners of the bottom of the testing frame; a data receiving mechanism is installed at the upper end of the testing frame, an impact mechanism is installed at the upper end of the testing frame, and the impact mechanism is configured to provide power for battery impact testing; a battery fixing mechanism is placed on the data receiving mechanism, and the battery fixing mechanism is configured to limit different sizes of batteries.

[0007] Preferably, the data receiving mechanism comprises a data box and clamping plates, clamping plates are arranged in the middle of the two parallel clamping plates, adjusting plates are arranged at the middle of the two parallel clamping plates, limiting columns are sleeved on the adjusting plates to limit the adjusting plates relative to the clamping plates, and the limiting columns are provided with abutting blocks at the middle of the two parallel clamping plates.

[0008] Preferably, back plates are arranged on the surfaces away from each other of the two parallel clamping plates, the back plates are designed in a U shape, and the U-shaped opening of the back plate is used for limiting the position of the two parallel clamping plates.

[0009] Preferably, first limiting plates and second limiting plates are arranged at the four ports of the two parallel clamping plates, the first limiting plates are clamped at the front ends of the clamping plates, and the second limiting plates are clamped at the rear ends of the clamping plates.

[0010] Preferably, the data box is fixed to the outer end surface of the first limiting plate, an adjusting disc is arranged on the second limiting plate on the same side of the data box, the adjusting disc is connected to the data box through a transmission shaft, the transmission shaft is designed in a hollow shape, a miniature video recorder, a temperature sensor and a sensor related to battery impact are arranged at the middle of the two parallel clamping plates, the sensors are electrically connected to electrical elements in the data box through the adjusting disc and the transmission shaft, and a processor is arranged in the data box.

[0011] Preferably, the impact mechanism comprises a lower limiting plate and an upper horizontal plate parallel to the lower limiting plate, U-shaped supports are fixed at both ends of the upper horizontal plate, hydraulic impact columns symmetrically distributed through the upper horizontal plate and the lower limiting plate are arranged on the upper horizontal plate, a telescopic motor penetrating through the upper horizontal plate and the lower limiting plate is arranged on the upper horizontal plate, the motor shaft of the telescopic motor is connected to the lower limiting plate to realize the up-down movement of the lower limiting plate,

[0012] Preferably, the battery fixing mechanism comprises an upper limit ring and a lower limit ring, the upper limit ring and the lower limit ring are arranged in parallel, the upper limit ring and the lower limit ring are connected through an adjusting shaft, and the upper limit ring and the lower limit ring are uniformly and circularly arranged with limit holes.

[0013] Preferably, the limit holes are detachably fixed with adjusting bolts, the upper limit ring is fixed with two adjusting bolts on the limit rods, and the upper limit ring is provided with at least two cross-distributed limit rods.

[0014] Preferably, the lower limit ring is fixed with two adjusting bolts on the limit rods, and the lower limit ring is provided with at least two cross-distributed limit rods.

[0015] Preferably, the adjusting shaft comprises a sleeve shaft, the front end of the sleeve shaft is sleeved with an upper shaft, the upper shaft can move up and down in the sleeve shaft, the upper shaft is fixed in position through a locking buckle on the outer surface of the sleeve shaft, the front end of the upper shaft is provided with an adjusting bolt, the end of the sleeve shaft is provided with an adjusting bolt, and the adjusting shaft is fixed on the limit holes of the upper limit ring and the lower limit ring through the adjusting bolts.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The two hydraulic impact columns are used as a pneumatic telescopic air pump, the impact power for battery impact test can be provided through the setting of stroke, the air pressure can be adjusted according to needs, the impact force can be controlled, and the maximum impact resistance of a battery pack can be tested.

[0018] 2. The battery adjusting mechanism is arranged, the diameters and lengths of different dry batteries can be adjusted, the optimal accommodation and fixing can be ensured, and the impact test can be conveniently performed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the test device of the present application.

[0020] Figure 2 It is a structural schematic view of the impact mechanism of the present application.

[0021] Figure 3 It is a structural schematic view of the data receiving mechanism of the present application.

[0022] Figure 4 It is a structural schematic view of the battery fixing mechanism of the present application.

[0023] Figure 5 It is a structural schematic view of the adjusting shaft of the present application.

[0024] Figure 6The impact mechanism impact test flowchart of the present application is shown in the figure;

[0025] Figure 7 The impact mechanism heat resistance test flowchart of the present application is shown in the figure;

[0026] Figure 8 The glass cover structure of the present application is shown in the figure.

[0027] In the figure: 1, universal wheel; 2, telescopic leg; 3, test frame; 4, data receiving mechanism; 5, impact mechanism; 6, U-shaped support; 7, lower limit plate; 8, hydraulic impact column; 9, telescopic motor; 10, upper horizontal plate; 11, data box; 12, first limit plate; 13, transmission shaft; 14, adjusting disc; 15, limit column; 16, adjusting plate; 17, clamping plate; 18, back plate; 19, clamping plate; 20, second limit plate; 21, battery fixing mechanism; 22, limit rod; 23, upper limit ring; 24, adjusting shaft; 25, lower limit ring; 26, limit hole; 27, adjusting bolt; 28, upper shaft; 29, locking buckle; 30, sleeve shaft; 31, glass sealing head; 32, impact notch; 33, glass cover. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Referring to Figures 1 to 8 The present application provides three embodiments:

[0032] Embodiment one: a battery pack testing device based on multi-size fixing mechanism, the battery pack testing device comprises a test frame 3 for impact test, the bottom four corners of the test frame 3 are provided with telescopic legs 2 for lifting and lowering the test frame 3, the bottom four corners of the test frame 3 are provided with universal wheels 1; the upper end of the test frame 3 is provided with a data receiving mechanism 4, the upper end of the test frame 3 is provided with an impact mechanism 5, the impact mechanism 5 is configured to provide power for battery impact test; the data receiving mechanism 4 is provided with a battery fixing mechanism 21, the battery fixing mechanism 21 is configured to limit different size batteries.

[0033] The data receiving mechanism 4 comprises a data box 11 and a clamping plate 17, two parallel clamping plates 17 are provided with clamping plates 19 at the middle position, two parallel clamping plates 17 are provided with adjusting plates 16 at the middle position, the adjusting plates 16 are provided with limiting columns 15 which can limit the adjusting plates 16 relative to the clamping plates 17, wherein the limiting columns 15 at the middle position of the two parallel clamping plates 17 are provided with abutting blocks.

[0034] The two parallel clamping plates 17 are provided with back plates 18 on the opposite surfaces, the back plates 18 are designed in U shape, and the U-shaped opening of the back plates 18 can be used to limit the position of the two parallel clamping plates 17.

[0035] The two parallel clamping plates 17 are provided with first limiting plates 12 and second limiting plates 20 at the four ports respectively, the first limiting plates 12 are clamped at the end of the clamping plate 17 of the front end surface, and the second limiting plates 20 are clamped at the end of the clamping plate 17 of the rear end surface.

[0036] The outer end surface of the first limiting plate 12 is fixed with the data box 11, the second limiting plate 20 on the same side of the data box 11 is provided with an adjusting disc 14, the adjusting disc 14 is communicated with the data box 11 through a transmission shaft 13, the transmission shaft 13 is designed in hollow, and the middle position of the two parallel clamping plates 17 is provided with a micro video recorder, a temperature sensor and a sensor related to battery impact, the above sensors are electrically connected with the electrical elements in the data box 11 through the adjusting disc 14 and the transmission shaft 13, and the data box 11 is provided with a processor.

[0037] The impact mechanism 5 includes a lower limit plate 7 and an upper horizontal plate 10 arranged in parallel with the lower limit plate 7, both ends of the upper horizontal plate 10 are fixed with U-shaped supports 6, the upper horizontal plate 10 is installed with hydraulic impact columns 8 penetrating the upper horizontal plate 10 and the lower limit plate 7 and symmetrically distributed, the upper horizontal plate 10 is installed with a telescopic motor 9 penetrating the upper horizontal plate 10 and the lower limit plate 7, the motor shaft of the telescopic motor 9 can realize linkage with the lower limit plate 7, realizing the up-down movement of the lower limit plate 7.

[0038] The battery fixing mechanism 21 includes an upper limit ring 23 and a lower limit ring 25 arranged in parallel, the upper limit ring 23 and the lower limit ring 25 are connected by an adjusting shaft 24, and the upper limit ring 23 and the lower limit ring 25 are evenly and annularly arranged with limit holes 26; the limit holes 26 are detachably fixed with adjusting bolts 27, the upper limit ring 23 is fixed with limit rods 22 through two adjusting bolts 27, and the upper limit ring 23 is installed with at least two limit rods 22 distributed in cross.

[0039] The adjusting shaft 24 includes a sleeve shaft 30, the front end of the sleeve shaft 30 is sleeved with an upper shaft 28, the upper shaft 28 can move up and down in the sleeve shaft 30, the upper shaft 28 is fixed in position by a locking buckle 29 located on the outer surface of the sleeve shaft 30, the front end of the upper shaft 28 is provided with an adjusting bolt 27, the end of the sleeve shaft 30 is provided with an adjusting bolt 27, and the adjusting shaft 24 is fixed on the limit holes 26 of the upper limit ring 23 and the lower limit ring 25 through the adjusting bolts 27.

[0040] Embodiment two: this embodiment should be understood as at least containing all the features of any one of the preceding embodiments, and further improving on the basis thereof, specifically, a battery pack testing device based on a multi-size fixing mechanism, the battery pack testing device includes a testing frame 3 that can be used for impact testing, the bottom four corners of the testing frame 3 are divided and provided with telescopic legs 2 that can be used for lifting and lowering the testing frame 3, and the bottom four corners of the testing frame 3 are divided and provided with universal wheels 1; wherein the telescopic legs 2 are internally provided with hydraulic telescopic motors, which can be used for lifting and lowering the telescopic legs 2, and cooperate with the universal wheels 1 to realize the overall movement and fixation of the battery pack testing device. The upper end of the testing frame 3 is installed with a data receiving mechanism 4, the upper end of the testing frame 3 is installed with an impact mechanism 5, the impact mechanism 5 is configured as the power supply of the battery impact test; the data receiving mechanism 4 is placed with a battery fixing mechanism 21, and the battery fixing mechanism 21 is configured to limit different sizes of batteries.

[0041] The data receiving mechanism 4 comprises a data box 11 and clamping plates 17, two parallel clamping plates 17 are provided with clamping plates 19 in the form of clamping slots at the middle position, two parallel clamping plates 17 are provided with adjusting plates 16 at the middle position, the adjusting plates 16 are provided with limiting columns 15 which can limit and fix the adjusting plates 16 relative to the clamping plates 17, and the limiting columns 15 are provided with abutting blocks at the middle position of the two parallel clamping plates 17. The two parallel clamping plates 17 are provided with back plates 18 on the surfaces away from each other, the back plates 18 are designed in the form of U, and the U-shaped opening of the back plates 18 can be used to limit the position of the two parallel clamping plates 17; the clamping plates 19 and the back plates 18 are used to limit the parallel position of the two clamping plates 17 and to ensure that the impact resistance of the clamping plates 17 is stable during the stamping process.

[0042] The two parallel clamping plates 17 are respectively provided with first limiting plates 12 and second limiting plates 20 at the four ports, the first limiting plates 12 are clamped at the ends of the clamping plates 17 on the front end surface, and the second limiting plates 20 are clamped at the ends of the clamping plates 17 on the rear end surface.

[0043] The first limiting plate 12 is fixed on the outer end surface of the data box 11, the second limiting plate 20 on the same side of the data box 11 is provided with an adjusting disc 14, the adjusting disc 14 is connected with the data box 11 through a transmission shaft 13, the transmission shaft 13 is designed in the form of hollow, and the middle position of the two parallel clamping plates 17 is provided with a micro video recorder, a temperature sensor and a sensor related to battery impact, the above sensors are electrically connected with the electrical elements in the data box 11 through the adjusting disc 14 and the transmission shaft 13, and the data box 11 is provided with a processor.

[0044] The data box 11 is provided with a corresponding processor and a data storage device, which can be used for receiving and storing the test data of the front-end battery impact resistance, and can also be used for operation, so as to record the test data, and the data box 11 is provided with at least one signal transmission module such as a WIFI module and a 4G module, which is not limited to the above list, and can be used for remote wireless transmission of the test data, so as to facilitate the calling of the data.

[0045] The two parallel clamping plates 17 are fixed in relative position by the back plate 18 and the clamping plate 19, which can ensure that the relative position of the clamping plate 17 will not be moved by external force during the battery test. In the case of small battery specifications, the back plate 18 and the clamping plate 19 corresponding to the battery specifications can be replaced to adjust the relative distance between the two clamping plates 17. At the same time, according to the setting of the back plate 18 and the clamping plate 19, the displacement will not be affected by external force during the impact process. By adjusting the setting of the adjusting disc 14, the transmission shaft 13 can be locked to ensure that the internal wires are not exposed.

[0046] The impact mechanism 5 includes a lower limiting plate 7 and an upper horizontal plate 10 arranged in parallel with the lower limiting plate 7. The two ends of the upper horizontal plate 10 are fixed with U-shaped supports 6. The upper horizontal plate 10 is installed with hydraulic impact columns 8 penetrating the upper horizontal plate 10 and the lower limiting plate 7 and symmetrically distributed. The upper horizontal plate 10 is installed with a telescopic motor 9 penetrating the upper horizontal plate 10 and the lower limiting plate 7. The motor shaft of the telescopic motor 9 can realize linkage with the lower limiting plate 7 to realize the up-down movement of the lower limiting plate 7.

[0047] The two hydraulic impact columns 8 are pneumatic telescopic air pumps, which can provide impact power for the battery impact test by setting the stroke. The air pressure can be adjusted according to the needs to control the impact force and test the maximum impact resistance of the battery pack. The lower surface of the lower limiting plate 7 is attached with an electric heating wire, which can be used to determine the working of the electric heating wire according to the need for heat resistance test of the battery pack. The electric heating wire can be adjusted according to the power needs to achieve the test purpose at different temperatures.

[0048] The impact mechanism 5 is configured to provide power for the battery impact test. The impact mechanism 5 provides the source power for the battery impact test through the hydraulic impact column 8. The hydraulic impact column 8 includes an outer shell, a stroke-controllable hydraulic pump built-in the outer shell, and an impact needle installed with the hydraulic pump. The hydraulic pump provides power for the impact needle. The power output size of the hydraulic pump determines the corresponding output impact force of the hydraulic impact needle. By adjusting the output power, the maximum impact resistance of the battery can be determined.

[0049] The impact mechanism 5 is also configured to provide power for the battery heat resistance test. The impact mechanism 5 provides a heat power source through the electric heating wire attached to the lower surface of the lower limiting plate 7. The output shaft of the telescopic motor 9 is connected with the lower limiting plate 7. The center shaft hole of the lower limiting plate 7 is provided with a shaft sleeve. The telescopic motor 9 rotates to transmit power to the lower limiting plate 7. The shaft sleeve can control the horizontal power of the lower limiting plate 7 to make it only move vertically. The lower limiting plate 7 can move according to the heat resistance test of the battery to cooperate with the working of the electric heating wire.

[0050] Embodiment three: this embodiment should be understood as at least containing all the features of any one of the preceding embodiments, and further improving on the basis thereof, specifically, a battery fixing mechanism for battery testing, the battery fixing mechanism 21 comprises an upper limit ring 23 and a lower limit ring 25, the upper limit ring 23 and the lower limit ring 25 are arranged in parallel, the upper limit ring 23 and the lower limit ring 25 are connected through an adjusting shaft 24, and the upper limit ring 23 and the lower limit ring 25 are uniformly and circularly arrayed with limiting holes 26.

[0051] The limiting holes 26 can be used for detachable fixing of adjusting bolts 27, the limiting rods 22 are fixed on the upper limit ring 23 through two adjusting bolts 27, and the upper limit ring 23 is provided with at least two cross-distributed limiting rods 22; the cooperation of the upper limit ring 23, the lower limit ring 25 and the limiting rods 22 blocks the two ends of the battery to be tested, the adjusting shaft 24 can be used as the limiting of the circumferential edge of the battery to be tested, the limiting rods 22 can be fixed and installed on the upper limit ring 23 and the lower limit ring 25 through the adjusting bolts 27, the limiting rods 22 are designed in a telescopic manner, and the limiting rods 22 are provided with a sleeve rod and a movable rod, a fixed cap is installed on the sleeve rod at the connection between the sleeve rod and the movable rod, the length of the limiting rod 22 can be adjusted according to the needs of the site, and then the fixed cap is used for fixing, wherein the upper limit ring 23 and the lower limit ring 25 are respectively provided with not less than two limiting rods, and each limiting rod 22 is cross-installed.

[0052] The adjusting shaft 24 comprises a sleeve shaft 30, the front end of the sleeve shaft 30 is sleeved with an upper shaft 28, the upper shaft 28 can move up and down in the sleeve shaft 30, wherein the upper shaft 28 is fixed in position through a locking buckle 29 located on the outer surface of the sleeve shaft 30, the front end of the upper shaft 28 is provided with an adjusting bolt 27, the end of the sleeve shaft 30 is provided with an adjusting bolt 27, and the fixing of the adjusting shaft 24 and the limiting holes 26 on the upper limit ring 23 and the lower limit ring 25 is realized through the adjusting bolt 27.

[0053] In the above battery package impact resistance test, the battery needs to be fixed, wherein the battery of different sizes is fixed by adjusting the position of the sleeve shaft 30 and the upper shaft 28 on the shaft 24 under the premise of different lengths, and is fixed by the locking buckle 29 to achieve length adjustment; in the process of adjusting the diameter of the battery, the position of the limiting rod 22 of different lengths in the limiting hole 26 of the upper limiting ring 23 and the lower limiting ring 25 is adjusted by adjusting the bolt 27, and the limiting rod 22 adopts a cross design to ensure that both ends block the battery, the battery fixing mechanism 21 is built in the inside of the glass cover 33, the glass cover 33 can be replaced with different specifications of glass cover 33 according to the size of the battery fixing mechanism 21, wherein the outer end of the glass cover 33 is threadedly sealed by the glass sealing head 31 to ensure the purpose of installation, the upper surface of the glass cover 33 is provided with an impact notch 32, the impact notch 32 can be used for the impact test of the battery fixing mechanism 21, wherein the glass cover 33 provides safety protection for the battery impact test; the glass cover 33 can be adaptively placed in the groove between the parallel distributed clamping plates 17 on the data receiving mechanism 4, and by adjusting the distance between the adjusting plate 16 and the clamping plate 19, the limiting and fixing of the glass cover 33 can be realized, so that the glass cover 33 can not be offset during the impact test, so that the battery clamped inside does not move, and the normal impact test is ensured.

[0054] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments but can be implemented in other embodiments without departing from the scope of the application. The embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description above, and therefore all changes which come within the meaning and range of equivalency of the claims are to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A battery pack testing device based on a multi-size fixing mechanism, the battery pack testing device including a test frame for impact testing, characterized in that: The test frame is provided with telescopic legs at the four corners of its bottom, which can be used to raise and lower the test frame. The test frame is also provided with casters at the four corners of its bottom. A data receiving mechanism is installed at the upper end of the test frame, and an impact mechanism is installed at the upper end of the test frame. The impact mechanism is configured to provide power for the battery impact test. A battery fixing mechanism is placed on the data receiving mechanism, which is configured to limit the position of batteries of different sizes. The data receiving mechanism includes a data box and a clamping plate. A clamping plate is installed in a slot at the middle position of the two parallel clamping plates. An adjusting plate is installed at the middle position of the two parallel clamping plates. A limiting post is fitted on the adjusting plate to limit and fix the adjusting plate relative to the clamping plate. The limiting post is provided with an abutment block at the middle position of the two parallel clamping plates. The two parallel clamping plates are provided with a first limiting plate and a second limiting plate at their four ends respectively. The first limiting plate is locked at the end of the clamping plate on the front side of the parallel arrangement, and the second limiting plate is locked at the end of the clamping plate on the rear side of the parallel arrangement. A data box is fixed on the outer end face of the first limiting plate, and an adjustment plate is installed on the second limiting plate on the same side as the data box. The adjustment plate is connected to the data box through a transmission shaft. The transmission shaft has a hollow design. A miniature camera, a temperature sensor, and a sensor related to battery impact are provided in the middle position of the two parallel clamping plates. The above sensors are electrically connected to the electrical components inside the data box through the adjustment plate and the transmission shaft. A processor is provided inside the data box. The impact mechanism includes a lower limit plate and an upper horizontal plate arranged parallel to the lower limit plate. U-shaped brackets are fixed at both ends of the upper horizontal plate. Hydraulic impact columns symmetrically distributed through the upper horizontal plate and the lower limit plate are installed on the upper horizontal plate. A telescopic motor that penetrates the upper horizontal plate and the lower limit plate is installed on the upper horizontal plate. The motor shaft of the telescopic motor can be linked with the lower limit plate to realize the up and down movement of the lower limit plate. The battery fixing mechanism includes an upper limit ring and a lower limit ring, which are arranged in parallel and connected by an adjusting shaft. Limit holes are evenly distributed in a ring array on the upper and lower limit rings.

2. The battery pack testing device based on a multi-size fixing mechanism according to claim 1, characterized in that: A back plate is added to the opposite surfaces of the two parallel clamping plates. The back plate adopts a U-shaped design, and the U-shaped opening of the back plate can be used to limit the position of the two parallel clamping plates.

3. The battery pack testing device based on a multi-size fixing mechanism according to claim 1, characterized in that: The limiting hole can be used for the detachable fixing of the adjusting bolt. The upper limit ring is fixed with two adjusting bolts to the limiting bar. At least two interleaved limiting bars are installed on the upper limit ring.

4. The battery pack testing device based on a multi-size fixing mechanism according to claim 1, characterized in that: The lower limit ring is fixed with two adjusting bolts to secure the limit bar, and at least two staggered limit bars are installed on the lower limit ring.

5. A battery pack testing device based on a multi-size fixing mechanism according to claim 1, characterized in that: The adjusting shaft includes a sleeve shaft, and an upper shaft is fitted at the front end of the sleeve shaft. The upper shaft can move up and down within the sleeve shaft. The upper shaft is fixed in position by a locking buckle located on the outer surface of the sleeve shaft. An adjusting bolt is provided at the front end of the upper shaft and at the end of the sleeve shaft. The adjusting bolts are used to fix the adjusting shaft to the limiting holes on the upper and lower limit rings.

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