Battery extrusion test device

Abstract

The utility model relates to the technical field of battery production, in particular to a battery extrusion test device which comprises a fixing base, a counterweight assembly and a supporting assembly, the counterweight assembly is arranged on the side, away from the ground, of the fixing base, and an extrusion area is formed between the counterweight assembly and the fixing base; the counterweight assembly moves along the height direction of the fixed seat so as to extrude the to-be-tested battery in the extrusion area; the supporting assembly is arranged on the fixing base and used for placing a battery to be tested, and the supporting assembly can move into the extrusion area or out of the extrusion area. By moving the supporting assembly into the extrusion area, the to-be-tested battery can be moved into the extrusion area so as to smoothly perform an extrusion test on the to-be-tested battery; by moving the supporting assembly out of the extrusion area, the to-be-tested battery can be placed on the supporting assembly outside the extrusion area or the tested battery can be taken down from the supporting assembly, so that accidental injury to people caused by falling of the counterweight assembly can be avoided, and the safety of the test process is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery production, and particularly to a battery extrusion test device. Background Art

[0002] Due to the structural characteristics of the whole vehicle, power batteries are mainly arranged at the bottom or the tail. In the event of a traffic accident, these positions are extremely vulnerable to impact or extrusion. Therefore, in addition to the vehicle structure, the extrusion resistance of power batteries has become an important parameter for measuring driving safety.

[0003] The current national standard extrusion method sets a fixed extrusion force or deformation degree as the extrusion cut-off condition, which is different from the extrusion state suffered in actual accidents. In addition, due to the limitation of the extrusion structure, the space of the test station is small. At present, during the loading and unloading of the battery under test at the test station, there is a risk of accidental injury caused by the fall of the extrusion mechanism. Utility Model Content

[0004] This application provides a battery extrusion test device to solve the problem that there is a risk of accidental injury caused by the fall of the extrusion mechanism during the loading and unloading of the battery under test at the test station in the prior art.

[0005] On the one hand, this application provides a battery extrusion test device, including:

[0006] A fixed seat;

[0007] A counterweight assembly, arranged on the side of the fixed seat away from the ground. An extrusion area is formed between the counterweight assembly and the fixed seat. The counterweight assembly squeezes the battery under test in the extrusion area by moving along the height direction of the fixed seat;

[0008] A support assembly, arranged on the fixed seat, for placing the battery under test. The support assembly can move into or out of the extrusion area.

[0009] In a possible design, the support assembly includes:

[0010] A test platform, arranged on the fixed seat, for placing the battery under test. The test platform has a first position and a second position;

[0011] A moving mechanism, arranged on the fixed seat, for moving the test platform to the first position / second position so that the battery under test is located inside / outside the extrusion area.

[0012] In a possible design, the support assembly further includes a support seat. The support seat is arranged at the position of the fixed seat corresponding to the extrusion area, and the support seat is used to support the test platform located at the first position.

[0013] In a possible design, the support assembly further includes an airbag disposed between the test platform and the fixed seat, capable of separating / contacting the test platform from / to the support seat by inflating / deflating.

[0014] In a possible design, the moving mechanism includes rollers mounted on one side of the test platform close to the fixed seat.

[0015] In a possible design, the moving mechanism further includes a buffer seat. One end of the airbag is connected to the buffer seat, and the other end is connected to the test platform; the rollers are mounted on the buffer seat.

[0016] In a possible design, the counterweight assembly includes:

[0017] A counterweight platform for placing counterweights;

[0018] A guide post disposed on the fixed seat. The axial direction of the guide post is the height direction of the fixed seat, and the guide post is slidably connected to the counterweight platform;

[0019] A lifting mechanism disposed on the fixed seat for moving the counterweight platform away from the support assembly along the guide post.

[0020] In a possible design, the lifting mechanism includes:

[0021] A lifting seat disposed on the fixed seat;

[0022] A first fixed pulley disposed at one end of the lifting seat close to the fixed seat;

[0023] A second fixed pulley disposed at one end of the lifting seat away from the fixed seat;

[0024] A traction cable, one end of which is connected to the first fixed pulley, and the other end bypasses the first fixed pulley and the second fixed pulley in sequence and is connected to the driver. The middle part of the traction cable is connected to the counterweight platform.

[0025] In a possible design, the battery extrusion test device further includes an acceleration sensor disposed on the counterweight platform.

[0026] In a possible design, the battery extrusion test device further includes a laser rangefinder disposed on the test platform.

[0027] The beneficial effects of the present application are as follows:

[0028] The battery extrusion test device of the present application includes a counterweight assembly and a support assembly. The support assembly is used to place the battery to be tested, and the counterweight assembly is used to extrude the battery to be tested. An extrusion area is formed between the counterweight assembly and the support assembly. By moving the support assembly into the extrusion area, the battery to be tested can be moved into the extrusion area to smoothly perform the extrusion test on the battery to be tested; by moving the support assembly out of the extrusion area, the battery to be tested can be placed on the support assembly outside the extrusion area or the battery that has completed the test can be removed from the support assembly. Thus, it is possible to avoid accidental injury caused by the fall of the counterweight assembly and improve the safety of the test process.

[0029] At the same time, by making the counterweight assembly fall along the height direction of the fixed seat to extrude the battery to be tested in the extrusion area, it is possible to dynamically adjust the extrusion force and extrusion conditions applied to the battery, so as to simulate the battery failure conditions under different situations, be able to find out the ultimate bearing capacity of the battery, provide effective test data support for strengthening through other components, and be conducive to comprehensively improving the safety protection level of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the battery extrusion test device provided by an embodiment of the present application;

[0032] Figure 2 It is a front view of the battery extrusion test device provided by an embodiment of the present application;

[0033] Figure 3 It is a side view of the test platform of the battery extrusion test device provided by an embodiment of the present application in the first position;

[0034] Figure 4 It is a side view of the test platform of the battery extrusion test device provided by an embodiment of the present application in the second position.

[0035] Reference Signs:

[0036] 100, Fixed base; 200, Counterweight assembly; 210, Counterweight platform; 220, Guide post; 230, Lifting mechanism; 231, Lifting seat; 232, First fixed pulley; 233, Second fixed pulley; 234, Traction cable; 300, Support assembly; 310, Test platform; 320, Support base; 330, Airbag; 340, Roller; 350, Buffer seat; 400, Acceleration sensor; 500, Laser rangefinder. Detailed implementation manners

[0037] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0038] The following combines Figures 1 - 4 to describe the battery extrusion test device provided in the embodiments of the present application.

[0039] Referring to Figure 1 As shown, in some embodiments provided by the present application, the battery extrusion test device includes a fixed base 100, a counterweight assembly 200, and a support assembly 300. The counterweight assembly 200 is disposed on a side of the fixed base 100 away from the ground. An extrusion area is formed between the counterweight assembly 200 and the fixed base 100. The counterweight assembly 200 moves along the height direction of the fixed base 100 to extrude the battery under test in the extrusion area. The support assembly 300 is disposed on the fixed base 100 and is used to place the battery under test. The support assembly 300 can move into or out of the extrusion area. In some specific embodiments, the counterweight assembly 200 is located above the fixed base 100, the area between the counterweight assembly 200 and the fixed base 100 is the extrusion area, and the support assembly 300 is movably disposed on the fixed base 100. The support assembly 300 can move along the length direction of the fixed base 100, so as to realize the position change of the support assembly 300 inside and outside the extrusion area.

[0040] Before the test, move the support assembly 300 along the length direction of the fixed base 100 to outside the extrusion area, place the battery under test on the support assembly 300; then move the support assembly 300 along the length direction of the fixed base 100 into the extrusion area; lower the counterweight assembly 200 along the height direction of the fixed base 100 to extrude the battery under test on the support assembly 300. After the test is completed, move the support assembly 300 along the length direction of the fixed base 100 to outside the extrusion area, and remove the battery from the support assembly 300.

[0041] Using the technical solution provided in the above embodiments of the present application, by providing a counterweight assembly 200 and a support assembly 300, the support assembly 300 is used to place the battery under test, the counterweight assembly 200 is used to squeeze the battery under test, and an extrusion zone is formed between the counterweight assembly 200 and the support assembly 300. By moving the support assembly 300 into the extrusion zone, the battery under test can be moved into the extrusion zone to smoothly perform an extrusion test on the battery under test; by moving the support assembly 300 out of the extrusion zone, the battery under test can be placed on the support assembly 300 outside the extrusion zone or the battery that has completed the test can be removed from the support assembly 300. Thereby, it is possible to avoid accidental injury caused by the fall of the counterweight assembly 200 and improve the safety of the test process. At the same time, by making the counterweight assembly 200 fall along the height direction of the fixed seat 100 to squeeze the battery under test in the extrusion zone, it is possible to dynamically adjust the extrusion force and extrusion conditions applied to the battery, so as to simulate the battery failure conditions in different situations.

[0042] Referring to Figure 1 As shown, in some embodiments provided by the present application, the support assembly 300 includes a test platform 310 and a moving mechanism. The test platform 310 is arranged on the fixed seat 100. The test platform 310 is used to place the battery under test. The test platform 310 has a first position ( Figure 3 the position shown) and a second position ( Figure 4The position shown); The moving mechanism is arranged on the fixed seat 100, and the moving mechanism is used to move the test platform 310 to the first position / the second position so that the battery to be tested is located inside / outside the extrusion area. In some specific embodiments, the moving mechanism includes rollers 340, and the rollers 340 are installed on the lower side of the test platform 310 close to the fixed seat 100. Specifically, there are multiple rollers 340, and the multiple rollers 340 are symmetrically installed on the left and right sides of the test platform 310. By rolling the rollers 340 on the fixed seat 100, the test platform 310 can be driven to move between the first position and the second position. In some specific embodiments, a driving member and a guide rail are further included. The driving member can be a motor, a cylinder, or a hydraulic cylinder; the guide rail is installed on the fixed seat 100, and the guide rail extends along the length direction of the fixed seat 100. The rollers 340 can roll inside the guide rail. Under the drive of the driving member, the rollers 340 are driven to roll along the guide rail to drive the test platform 310 to move between the first position and the second position. In this way, the test platform 310 can be limited in the width direction of the fixed seat 100, so as to ensure that when the test platform 310 is in the first position, the battery to be tested is located in the central area of the extrusion area. In other embodiments, two limit switches are further arranged on the fixed seat 100. One limit switch corresponds to the first position of the test platform 310, and the other limit switch corresponds to the second position of the test platform 310. In this way, it can be ensured that when the test platform 310 is in the first position, the battery to be tested is completely inside the extrusion area, and when the test platform 310 is in the second position, the battery to be tested is completely outside the extrusion area.

[0043] Refer to Figure 1 、 Figure 2 As shown, in some embodiments provided by the present application, the support assembly 300 further includes a support seat 320. The support seat 320 is arranged at the position of the fixed seat 100 corresponding to the extrusion area, and the support seat 320 can support the test platform 310 located at the first position. Specifically, the support seat 320 is fixedly installed on the fixed seat 100, and the support seat 320 is located directly below the counterweight assembly 200. The upper end surface of the support seat 320 is basically flush with the lower end surface of the test platform 310. Thus, when the test platform 310 moves to the first position, the upper end surface of the support seat 320 just comes into contact with the lower end surface of the test platform 310. The support seat 320 can share part of the weight of the counterweight assembly 200 for the test platform 310, avoiding serious damage to the test platform 310 when the counterweight assembly 200 falls onto the battery; when the test platform 310 moves from the first position to the second position, relative sliding between the upper end surface of the support seat 320 and the lower end surface of the test platform 310 can realize the movement of the test platform 310.

[0044] Refer to Figure 1 、 Figure 2As shown, in some embodiments provided by the present application, the support assembly 300 further includes an airbag 330. The airbag 330 is disposed between the test platform 310 and the fixed seat 100 and can separate / contact the test platform 310 from / to the support seat 320 by inflating / deflating. Specifically, the airbag 330 is a soft bag made of an elastic material and can produce a certain elastic deformation. In some specific embodiments, there are multiple airbags 330, and the shape and size of each airbag 330 are equal. The multiple airbags 330 are symmetrically and evenly distributed on the left and right sides of the lower end surface of the test platform 310. All the airbags 330 are connected through an air duct, and the air duct is connected to an air compressor. Through the air duct, air can be inflated into each airbag 330 or each airbag 330 can be exhausted. Since the airbag 330 is disposed between the test platform 310 and the fixed seat 100 and the airbag 330 has the property of being elastically deformable, when the airbag 330 is inflated, the multiple airbags 330 bulge under the action of increased air pressure, so that the test platform 310 above the airbag 330 is lifted, separating the test platform 310 from the support seat 320, which is beneficial for the test platform 310 to move smoothly from the first position to the second position; when the airbag 330 is exhausted, the multiple airbags 330 partially retract under the action of decreased air pressure, so that the test platform 310 above the airbag 330 descends together with the airbag 330 until the test platform 310 contacts the support seat 320, which is beneficial for the support seat 320 to share the impact force of the weight component 200 on the test platform 310.

[0045] Referring to Figure 1 , Figure 2 As shown, in some embodiments provided by the present application, the moving mechanism further includes a buffer seat 350. One end of the airbag 330 is connected to the buffer seat 350, and the other end of the airbag 330 is connected to the test platform 310; the roller 340 is installed on the buffer seat 350. Specifically, the buffer seat 350 is in a plate shape. The lower end of the airbag 330 is bonded to the buffer seat 350, and the upper end of the airbag 330 is bonded to the lower end surface of the test platform 310. The roller 340 is installed at the lower end of the buffer seat 350. By providing the buffer seat 350, the airbag 330 is installed at the upper end of the buffer seat 350, and the roller 340 is installed at the lower end of the buffer seat 350, which is equivalent to adding a buffer between the roller 340 and the test platform 310, avoiding damage to the roller 340 caused by the impact force during the test, and being beneficial for extending the service life of the roller 340.

[0046] Referring to Figure 1As shown, in some embodiments provided by the present application, the counterweight assembly 200 includes a counterweight platform 210, guide posts 220, and a lifting mechanism 230. The counterweight platform 210 is used to place counterweights; the guide posts 220 are arranged on the fixed seat 100, and the axial direction of the guide posts 220 is the height direction of the fixed seat 100. Guide holes are formed in the counterweight platform 210, and the guide posts 220 are inserted through the guide holes so that the guide posts 220 are slidably connected to the counterweight platform 210; the lifting mechanism 230 is arranged on the fixed seat 100 and is used to move the counterweight platform 210 away from the support assembly 300 along the guide posts 220. In some specific embodiments, a plurality of lifting mechanisms 230 are provided. Each lifting mechanism 230 respectively includes a lifting seat 231, a first fixed pulley 232, a second fixed pulley 233, and a traction cable 234. The lifting seat 231 is arranged on the fixed seat 100; the first fixed pulley 232 is arranged at one end of the lifting seat 231 close to the fixed seat 100; the second fixed pulley 233 is arranged at one end of the lifting seat 231 far from the fixed seat 100; one end of the traction cable 234 is connected to the first fixed pulley 232, and the other end of the traction cable 234 sequentially bypasses the first fixed pulley 232 and the second fixed pulley 233 and is connected to the driver. The middle part of the traction cable 234 is connected to the counterweight platform 210. In some embodiments, a connection buckle is provided in the middle of the traction cable 234, and a lifting ring is provided on the side of the counterweight platform 210. The connection buckle is connected to the lifting ring to connect the traction cable 234 to the counterweight platform 210, so that the traction cable 234 can drive the counterweight platform 210 to move upward. Specifically, the driver can be a driving motor. For example, by driving the output shaft of the driving motor to rotate, the other end of the traction cable 234 is wound around the output shaft, so that the traction cable 234 drives the counterweight platform 210 to rise to the initial position.

[0047] Referring to Figure 2 As shown, in some embodiments provided by the present application, the battery extrusion test device further includes an acceleration sensor 400, and the acceleration sensor 400 is arranged on the counterweight platform 210. The acceleration sensor 400 is used to collect the acceleration data when the counterweight platform 210 descends. By performing an integral operation on the acceleration data, the speed change of the counterweight platform 210 when it falls can be obtained.

[0048] Referring to Figure 2 As shown, in some embodiments provided by the present application, the battery extrusion test device further includes a laser rangefinder 500, and the laser rangefinder 500 is arranged on the test platform 310. The laser rangefinder 500 is used to collect the data of the height change of the counterweight platform 210 during lifting.

[0049] The working process of the battery extrusion test device provided by the embodiments of the present application:

[0050] Inflate the airbag 330 with compressed air to raise the test platform 310 and separate it from the support seat 320, and move the test platform 310 to the second position ( Figure 4 the position shown), and install the limiting tooling required for the test and the battery under test on the test platform 310;

[0051] Move the test platform 310 to the first position ( Figure 3 the position shown), and release the gas in the airbag 330 to make the test platform 310 contact the support seat 320;

[0052] Install counterweight blocks of the required mass on the counterweight platform 210, and lift the counterweight platform 210 to an appropriate height through the lifting device;

[0053] Let the counterweight platform 210 fall freely to conduct a dynamic extrusion test on the battery under test. Collect the data of the height change of the counterweight platform 210 through the laser rangefinder 500, and collect the acceleration data of the counterweight platform 210 when it lands through the acceleration sensor 400. Integrating the acceleration data can obtain the speed change of the counterweight platform 210 when it falls.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or capable of communicating with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A battery extrusion test device, characterized in that, Comprising: Fixed seat; Counterweight assembly, arranged on the side of the fixed seat away from the ground, an extrusion area is formed between the counterweight assembly and the fixed seat, and the counterweight assembly squeezes the battery under test in the extrusion area by moving along the height direction of the fixed seat; Support assembly, arranged on the fixed seat, for placing the battery under test, and the support assembly can move into or out of the extrusion area.

2. The battery extrusion test device according to claim 1, characterized in that, The support assembly includes: Test platform, arranged on the fixed seat, for placing the battery under test, and the test platform has a first position and a second position; Moving mechanism, arranged on the fixed seat, for moving the test platform to the first position / the second position so that the battery under test is located inside / outside the extrusion area.

3. The battery extrusion test device according to claim 2, characterized in that: The support assembly further includes a support seat, and the support seat is arranged on the fixed seat corresponding to the extrusion area, and the support seat is used to support the test platform located at the first position.

4. The battery extrusion test device according to claim 3, characterized in that: The support assembly further includes an airbag, and the airbag is arranged between the test platform and the fixed seat, and can be separated from / contacted with the support seat by inflating / deflating the airbag.

5. The battery extrusion test device according to claim 4, characterized in that: The moving mechanism includes rollers, and the rollers are installed on the side of the test platform close to the fixed seat.

6. The battery extrusion test device according to claim 5, characterized in that: The moving mechanism further includes a buffer seat, one end of the airbag is connected to the buffer seat, and the other end of the airbag is connected to the test platform; the rollers are installed on the buffer seat.

7. The battery extrusion test device according to any one of claims 1-6, characterized in that, The counterweight assembly includes: Counterweight platform, for placing counterweights; Guide post, arranged on the fixed seat, the axial direction of the guide post is the height direction of the fixed seat, and the guide post is slidably connected to the counterweight platform; Lifting mechanism, arranged on the fixed seat, for moving the counterweight platform away from the support assembly along the guide post.

8. The battery extrusion test device according to claim 7, characterized in that, The lifting mechanism includes: Lifting seat, arranged on the fixed seat; First fixed pulley, arranged at one end of the lifting seat close to the fixed seat; Second fixed pulley, arranged at one end of the lifting seat away from the fixed seat; Traction cable, one end is connected to the first fixed pulley, and the other end sequentially bypasses the first fixed pulley and the second fixed pulley and is connected to the driver, and the middle part of the traction cable is connected to the counterweight platform.

9. The battery extrusion test device according to claim 7, wherein: It further includes an acceleration sensor, and the acceleration sensor is arranged on the counterweight platform.

10. The battery extrusion test device according to any one of claims 2-6, characterized in that: It further includes a laser rangefinder, and the laser rangefinder is arranged on the test platform.

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