CN118067543A

CN118067543A - Test apparatus and battery test method

Info

Publication number: CN118067543A
Application number: CN202410473743.4A
Authority: CN
Inventors: 王笃志; 苗星晖; 李艳坤; 张灏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-04-19
Filing date: 2024-04-19
Publication date: 2024-05-24

Abstract

The application discloses a test device and a battery test method. The testing device of the embodiment of the application is used for testing the torsional strength of the battery and comprises a base, an adjusting device, a bracket and at least one force application device. The adjusting device is arranged on the base, the bracket is arranged on the adjusting device, and the adjusting device is used for driving the bracket to move along a first direction and a second direction; the force application device is arranged on the bracket and is used for being connected with the battery and applying force along a third direction to the battery, and the first direction, the second direction and the third direction are perpendicular to each other. In the torsional strength testing equipment provided by the embodiment of the application, the support is driven to move along the first direction and the second direction by the adjusting device, and the force application device is borne by the support, so that the force application device can move in a large range along the first direction and the second direction, thereby effectively expanding the size range of a battery applicable to the torsional strength testing equipment and improving the compatibility of the same equipment to different batteries.

Description

Test apparatus and battery test method

Technical Field

The application relates to the technical field of battery testing, in particular to testing equipment and a battery testing method.

Background

In an automobile powered by a battery, the battery is easily subjected to pressure in different directions along with the running condition of the automobile to twist, so that the power battery is deformed and even fails. The battery torsion strength testing device can detect the torsion strength of the battery by applying a certain directional acting force to the battery. However, the torsional strength test apparatus in the related art is poor in compatibility with the battery size.

Disclosure of Invention

In view of the foregoing, the present application provides a testing apparatus and a battery testing method, and is at least used for improving the compatibility of the testing apparatus with respect to the battery size.

In a first aspect, the present application provides a test apparatus for testing torsional strength of a battery.

The test equipment of the embodiment of the application comprises a base, an adjusting device, a bracket and at least one force application device, wherein: the adjusting device is arranged on the base, the bracket is arranged on the adjusting device, and the adjusting device is used for driving the bracket to move along a first direction and a second direction; the force application device is arranged on the bracket and is used for being connected with the battery and applying force along a third direction to the battery, and the first direction, the second direction and the third direction are perpendicular to each other.

In the torsional strength testing equipment provided by the embodiment of the application, the support is driven to move along the first direction and the second direction by the adjusting device, and the force application device is borne by the support, so that the force application device can move in a large range along the first direction and the second direction, thereby effectively expanding the size range of a battery applicable to the torsional strength testing equipment and improving the compatibility of the same equipment to different batteries.

In some embodiments, the adjusting device comprises a first adjusting mechanism and a second adjusting mechanism arranged on the first adjusting mechanism, wherein the first adjusting mechanism is arranged on the base and used for driving the second adjusting mechanism to move along a first direction so as to drive the bracket to move along the first direction, and the second adjusting mechanism is used for driving the bracket to move along a second direction.

In this way, the first adjusting mechanism drives the second adjusting mechanism to move along the first direction, and the second adjusting mechanism drives the support to move along the second direction, so that the support has the freedom degree of movement in the first direction and the second direction, and the force application device can move along with the support to match the sizes of the batteries in the first direction and the second direction.

In some embodiments, the first adjustment mechanism includes a first slide rail extending in a first direction and a first slider slidably disposed on the first slide rail, and the second adjustment mechanism is fixed to the first slider.

Therefore, the first sliding rail is matched with the first sliding block, so that the first adjusting mechanism can limit the second adjusting mechanism and the bracket to move along the first direction, and the position of the force application device in the first direction can be adjusted stably and conveniently.

In some embodiments, the second adjustment mechanism includes a mounting plate, a second slide rail, and a second slider slidably disposed on the second slide rail, the second slide rail disposed on the mounting plate and extending in a second direction, and the bracket is fixed on the second slider.

Therefore, the second sliding rail is matched with the first sliding rail, and the second adjusting mechanism can limit the bracket to move along the second direction, so that the position of the force application device in the second direction can be adjusted stably and conveniently.

In some embodiments, the adjustment device includes a first drive assembly mounted on the base and coupled to the mounting plate, the first drive assembly for driving movement of the mounting plate to move the second adjustment mechanism in the first direction.

Therefore, the first driving assembly drives the mounting plate to move along the second direction, and the positions of the second adjusting mechanism and the bracket in the first direction are adjusted, so that the battery is compatible with different sizes of the battery in the second direction.

In some embodiments, the adjustment device includes a second drive assembly mounted on the mounting plate, the second drive assembly coupled to the carriage, the second drive assembly for driving the carriage to move in the second direction.

Therefore, the second driving assembly drives the bracket to move along the second direction relative to the mounting plate, and the position of the bracket on the second sliding rail is adjusted, so that the battery is compatible with different sizes of the battery in the second direction.

In some embodiments, the side of the mounting plate facing the base is provided with a reinforcing structure.

So, through set up additional strengthening in the mounting panel towards one side of base, increase second adjustment mechanism's intensity for the second slide rail keeps straightly, thereby ensures holistic stability and the regulation precision of adjusting device.

In some embodiments, the number of the first sliding rails is at least two, the at least two first sliding rails are arranged in parallel along the second direction at intervals, and the mounting plate is arranged on the at least two first sliding rails.

Therefore, the mounting plate is erected on the first sliding rails which are arranged in parallel along the first direction at intervals, so that the flatness and the stability of the mounting plate are improved.

In some embodiments, the force application device includes a locking member located at an end of the force application device in the third direction, the locking member being for connection with the battery.

Therefore, the locking piece is arranged at the end part of the force application device in the third direction and is connected with the battery, so that the force application device is ensured to be connected with the battery stably in the testing process, and the acting force in the third direction is kept to be applied to the battery.

In some embodiments, the force application device includes a movable assembly coupled to the locking member, the movable assembly configured to compensate for displacement of the locking member in the first direction and/or the second direction when the force application device drives the battery to move in the third direction.

In this way, the movable component compensates the displacement of the locking piece along the first direction and/or the second direction when the force application device applies force to the battery, so that the force application device is prevented from being excessively deformed in the testing process, and the testing equipment is protected.

In some embodiments, the movable assembly comprises a fixed part and a movable part movably connected with the fixed part through a spherical pair, the movable part is fixedly connected with the locking part, and the movable part is used for compensating the displacement of the locking part along the first direction and/or the second direction when the locking part moves along the third direction.

Therefore, the fixing piece and the movable piece in the movable assembly are movably linked through the spherical pair, and the movable piece is fixedly connected with the locking piece, so that the movable piece can drive the locking piece to move along the first direction and the second direction relative to the fixing piece, and the displacement of the locking piece and the battery in the first direction and/or the second direction is compensated.

In some embodiments, the fixed member is sleeved outside the movable member, and the movable member is sleeved at one end of the locking member away from the battery.

Therefore, the fixed part is sleeved outside the movable part, and the movable part is sleeved on the locking part, so that the force application device is compact in structure, and space is saved. In addition, the design is favorable for keeping the coaxiality of the fixed part, the movable part and the locking part, and ensures the consistency of the acting force applied by the force application device and the displacement direction of the battery.

In some embodiments, the force applying device includes an actuating mechanism and a connecting assembly, the connecting assembly being connected to the securing member, the actuating mechanism being mounted on the bracket and connected to the connecting assembly, the actuating mechanism being configured to provide a third directional force to the battery via the connecting assembly and the locking member.

In this way, the actuating mechanism is connected with the connecting component, the connecting component is connected with the fixing piece, and the fixing piece is fixedly connected with the locking piece, so that the actuating mechanism can control the force application device to apply the acting force in the third direction to the battery.

In some embodiments, the connecting assembly comprises a connecting seat and a bearing sleeve connected with the connecting seat, the fixing piece is fixedly arranged in the bearing sleeve, and the connecting seat is connected with the actuating mechanism.

In this way, the connecting seat is connected with the bearing sleeve and the actuating mechanism, and the fixing piece is fixedly arranged in the bearing sleeve, so that the actuating mechanism is stably connected with the connecting assembly and the fixing piece, and the actuating mechanism can stably apply acting force to the battery through the fixing piece and the connecting assembly.

In some embodiments, the force applying means comprises a pressure sensor coupled to the coupling mount and the carrier sleeve and configured to detect a force applied by the actuation mechanism to the battery.

Therefore, the connecting seat and the bearing sleeve are connected through the pressure sensor, so that the acting force applied to the connecting assembly by the actuating mechanism is detected, and the stress state of the battery in the testing process is confirmed.

In some embodiments, the force applying device includes an elastic component connecting the movable member and the connecting seat, and configured to apply an elastic force in a third direction to the movable member.

Therefore, the movable piece is connected with the connecting seat through the elastic component, and elastic force along the third direction is applied to the movable piece, so that after the test is finished and the force applied by the force applying device to the battery is removed, the force applying device can automatically reset.

In some embodiments, the force application device includes a third sliding rail and a third slider slidingly connected with the third sliding rail, the third sliding rail is connected with the bracket and extends along a third direction, and the third slider is connected with the connecting seat.

Therefore, the third sliding rail is matched with the third sliding block, the third sliding rail is connected with the bracket and extends along the third direction, and the third sliding block is connected with the connecting seat, so that the force application device is limited to displace along the third direction when the force is applied to the battery.

In some embodiments, the number of force applying devices is plural, and the plurality of force applying devices are spaced apart.

Therefore, the force applied to the battery by the force application devices can simulate the actual stress condition of the battery under the running working condition, and the reliability of the test result is improved.

In some embodiments, the test apparatus further comprises a support platform disposed on the base, the adjusting device and the support being disposed on one side of the support platform, the support platform being configured to hold the battery.

Therefore, the adjusting device and the support are distributed on one side of the supporting platform, so that when the battery to be tested is placed on the supporting platform, the adjusting device can adjust the force application point of the force application device for applying force to the battery according to the actual size of the battery, the operation is convenient, and the force application position is more accurate.

In a second aspect, the present application provides a battery testing method implemented using the testing apparatus of any of the above embodiments.

The battery testing method of the embodiment of the application comprises the following steps:

Controlling the force application device to apply force to the battery;

acquiring displacement data of a battery;

acquiring acting force applied by the force application device to the battery;

And determining a torsional strength test result of the battery according to the corresponding relation between the displacement data and the applied acting force.

The battery testing method provided by the second aspect of the application has the advantages of all the advantages of the testing equipment, higher testing reliability and better compatibility to batteries with different sizes because the testing equipment provided by the first aspect of the application is used for implementation.

In some embodiments, the battery testing method further comprises:

Acquiring the size and direction of acting force applied to a battery under a driving condition;

controlling the force application device to apply the acting force with the same size and direction as the acting force under the running working condition to the battery;

acquiring noise decibels generated by a battery;

And determining the torsion strength test result of the battery according to the noise decibel generated by the battery.

Therefore, the stress condition of the battery under the running working condition is obtained, and the force application device is controlled to apply the acting force with the same magnitude and direction as those under the running working condition to the battery, so that the running working condition is simulated for testing, and the reliability of the testing result is ensured. The noise decibels generated in the test process of the battery are obtained, and the test result is determined through the noise decibels, so that the battery is ensured not to cause noise interference under the driving working condition.

In some embodiments, determining the torsional strength test result of the battery based on the noise decibels generated by the battery comprises:

if the noise decibel generated by the battery is higher than the preset decibel, determining that the torsional strength test of the battery is not passed;

and if the decibel of the noise generated by the battery is smaller than or equal to the preset decibel, determining that the torsional strength test of the battery is passed.

Therefore, under the condition that the noise decibel generated by the battery is higher than the preset decibel, the torsional strength test of the battery is determined not to pass, and under the condition that the noise decibel generated by the battery is smaller than or equal to the preset decibel, the torsional strength test of the battery is determined to pass, so that the noise generated by the battery in the actual driving process is ensured to be lower than the noise standard identified by human ears, and the driving experience is improved.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application;

Fig. 2 is a schematic view of a structure of a battery according to an embodiment of the present application;

fig. 3 is a schematic view illustrating an exploded structure of a battery cell according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a test apparatus according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a test apparatus according to an embodiment of the present application in a top view;

FIG. 6 is a schematic diagram of a test apparatus according to an embodiment of the present application in front view;

FIG. 7 is a schematic diagram of an exploded structure of a test apparatus according to an embodiment of the present application;

FIG. 8 is a schematic view showing a combination of an adjusting device and a bracket according to an embodiment of the present application;

FIG. 9 is a schematic structural view of a force applying device according to an embodiment of the present application;

FIG. 10 is a schematic diagram of an exploded construction of a force applying device provided by an embodiment of the present application;

FIG. 11 is a flowchart of a battery testing method provided by an embodiment of the present application;

FIG. 12 is a flowchart of a battery testing method according to another embodiment of the present application;

Fig. 13 is a flowchart of a battery testing method according to still another embodiment of the present application.

Description of main reference numerals:

Vehicle 1000, battery cell 100, housing 10, battery cell assembly 20, main body portion 21, tab 22, battery end cap 30, battery 200, motor 300, controller 400, case 210, first portion 211, second portion 212;

Test equipment 2000, base 40, upper surface 401, stand 60, first support plate 61, second support plate 62, third support plate 63, support platform 80, support base 81, support plate 82, guide slot 83, third drive assembly 84;

The adjusting device 50, the first adjusting mechanism 51, the first sliding rail 511, the first sliding block 512, the second adjusting mechanism 52, the second sliding rail 521, the second sliding block 522, the mounting plate 523, the reinforcing structure 5231, the first driving component 53, the first handle 531, the first screw 532, the second driving component 54, the second handle 541, and the second screw 542;

the force application device 70, the locking member 71, the movable assembly 72, the fixed member 721, the nut 7211, the movable member 722, the ball bearing 7222, the actuating mechanism 73, the motor 731, the connection assembly 74, the connection base 741, the connection frame 741, the connection sleeve 7412, the carrier sleeve 742, the pressure sensor 75, the elastic assembly 76, the tension spring 761, the tension spring base 762, the third slide rail 781, and the third slider 782.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical 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. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The battery not only can be applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also can be widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as mobile communication equipment, intelligent wearing, aerospace, and the like. With diversification of usage scenes and increase of market demands, demands for battery quality are also increasing.

The battery can be a power battery and is used for providing driving power for vehicles such as new energy automobiles, electric bicycles, electric trains and the like. In the process of the vehicle topography trafficability test of the new energy vehicle, the battery abnormally sounds in a part of the vehicle using the battery to provide driving force. It was confirmed that this part of the vehicle was caused by deformation of the battery end cap due to torsional force applied to the battery under the twisted road test, and abnormal rattling occurred.

For this reason, it is necessary to test the torsional strength of the power battery to ensure that the vehicle using the power battery passes the test normally. In the related art, a test apparatus for testing torsional strength of a battery is restrained by a module of a fixed position to a battery to be tested and applies pressure to the battery at the fixed position to test the battery. The power battery has wide application, rich variety, larger product specification difference and wider size range coverage of the battery end cover, however, the scheme has limited compatibility to the battery size, and under the condition of larger battery size change, multiple sets of equipment are required for testing, the design and manufacturing cost is higher, and the resource is easy to empty.

Based on the above consideration, in order to solve the problem that the battery torsional strength testing device has poor compatibility with the battery size, the application provides testing equipment, which is characterized in that a force application device is arranged on a bracket and drives the bracket and the force application device to move by an adjusting device, so that the position of the force application device for applying pressure to the battery is matched with different sizes of the battery to be tested. The test equipment is also beneficial to simulating the actual stress state of the battery under the running working condition of the vehicle, and the reliability of the test result is enhanced.

The battery may be composed of one or more battery cells. The battery cell generally includes a housing, a cell assembly including a body that generates electrical energy and a tab electrically connected to the body, and a pole. The pole is usually arranged on the housing and connected with the main body through the pole lugs to conduct electric energy. The battery cell may be used for an electric device using a battery as a power source.

The powered device may be, but is not limited to, a vehicle, a cell phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. Among them, the spacecraft may be an airplane, a rocket, a space plane, a spacecraft, and the like, and the electric toys may include fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the electric tools include a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, and the like. The embodiment of the present application is not particularly limited to the above-described power consumption device.

Referring to fig. 1, for convenience of description, an electric device according to an embodiment of the application is described as a vehicle 1000. Fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 200 is provided in the interior of the vehicle 1000, and the battery 200 may be provided at the bottom, the head, or the tail of the vehicle 1000. The battery 200 may be used to power the vehicle 1000, and the battery 200 may be used as a driving power source for the vehicle 1000 to supply driving power to the vehicle 1000 instead of or in part instead of fuel oil or natural gas. The vehicle 1000 may also include a controller 400 and a motor 300, the controller 400 being configured to control the battery 200 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a structure of a battery 200 according to some embodiments of the application, wherein the structure of the battery 200 is exploded. The battery 200 includes a case 210 and a battery cell 100, and the battery cell 100 is accommodated in the case 210. The case 210 is used to provide an accommodating space for the battery cell 100, and the case 210 may have various structures. In some embodiments, the case 210 may include a first portion 211 and a second portion 212, the first portion 211 and the second portion 212 being overlapped with each other, the first portion 211 and the second portion 212 together defining an accommodating space for accommodating the battery cell 100. The second portion 212 may be a hollow structure with one end opened, the first portion 211 may be a plate-shaped structure, and the first portion 211 covers the opening side of the second portion 212, so that the first portion 211 and the second portion 212 together define an accommodating space; the first portion 211 and the second portion 212 may be hollow structures with one side open, and the open side of the first portion 211 is covered with the open side of the second portion 212. Of course, the case 210 formed by the first portion 211 and the second portion 212 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 200, the number of the battery cells 100 may be plural, and the plural battery cells 100 may be connected in series, parallel, or series-parallel, where series-parallel refers to both of the plural battery cells 100 being connected in series and parallel. The plurality of battery cells 100 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 100 is accommodated in the box 210; of course, the battery 200 may also be a battery module formed by connecting a plurality of battery cells 100 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 210. The battery 200 may further include other structures, for example, the battery 200 may further include a bus bar member for making electrical connection between the plurality of battery cells 100.

Wherein each battery cell 100 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 100 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell according to some embodiments of the present application. The battery cell 100 refers to the smallest unit constituting the battery 200. As shown in fig. 3, the battery cell 100 includes a housing 10, a cell assembly 20, a battery end cap 30, and other functional components.

The battery end cap 30 refers to a member that is covered at the opening of the case 10 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the battery end cap 30 may be adapted to the shape of the case 10 to fit the case 10. Alternatively, the battery end cover 30 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the battery end cover 30 is not easy to deform when being extruded and collided, so that the battery cell 100 can have a higher structural strength, and the safety performance can be improved. The battery end cap 30 may be provided with functional components such as electrode terminals. The electrode terminals may be used to electrically connect with the battery cell assembly 20 for outputting or inputting electric power of the battery cell 100. In some embodiments, a pressure relief mechanism may also be provided on the battery end cap 30 for relieving the internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold. The material of the battery end cap 30 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the cell end cap 30, which may be used to isolate electrical connection components within the housing 10 from the cell end cap 30 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The housing 10 is an assembly for mating with the battery end cap 30 to form the internal environment of the battery cell 100, where the internal environment may be formed to house the cell assembly 20, electrolyte, and other components. The case 10 and the battery end cap 30 may be separate components, and an opening may be provided in the case 10, and the battery end cap 30 may be closed at the opening to form the internal environment of the battery cell 100. The battery end cover 30 and the case 10 may be integrated, and specifically, the battery end cover 30 and the case 10 may form a common connection surface before other components are put into the case, and when the interior of the case 10 needs to be sealed, the battery end cover 30 is covered with the case 10. The housing 10 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 10 may be determined according to the specific shape and size of the cell assembly 20. The material of the housing 10 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The cell assembly 20 is a component in which electrochemical reactions occur in the battery cell 100. One or more battery cell assemblies 20 may be contained within the housing 10. The cell assembly 20 is formed mainly of a positive electrode sheet and a negative electrode sheet wound or stacked, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having active material constitute the main body portion 21 of the cell assembly 20, and the portions of the positive and negative electrode sheets having no active material constitute the tabs 22, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body 21 or may be located at two ends of the main body 21. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 22 is connected to the electrode terminal to form a current loop.

Referring to fig. 4, and further referring to fig. 4-7, fig. 4 is a schematic structural diagram of a test apparatus 2000 according to an embodiment of the present application, and fig. 7 is an exploded structural diagram of the test apparatus 2000 of fig. 4. The test apparatus 2000 of the present embodiment includes a base 40, an adjusting device 50, a bracket 60, and at least one force application device 70, wherein: the adjusting device 50 is arranged on the base 40, the bracket 60 is arranged on the adjusting device 50, and the adjusting device 50 is used for driving the bracket 60 to move along the first direction and the second direction; the force application device 70 is mounted on the bracket 60, and the force application device 70 is used for being connected with the battery 200 and applying force to the battery 200 along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

As shown in the figure, the X direction is a first direction, the Y direction is a second direction, and the Z direction is a third direction.

Specifically, the base 40 is located at the bottom of the test apparatus 2000, the base 40 may have a square shape, and four sides of the base 40 may form a solid beam, column or platform for placing the adjusting device 50. The geometric center area of the base 40 may be a solid flat plate structure, or may be a plurality of beams or columns connecting four sides of the base 40, so as to improve the overall strength of the base 40. The base 40 may be made of hard metal, for example, steel is used to make the base 40, so that the rigidity of the base 40 is ensured to be higher, and the bearing capacity and stability of the test device 2000 are improved.

The upper surfaces 401 of the plurality of beams or columns that make up the base 40 remain in the same horizontal plane. The adjusting device 50 is mounted on the upper surface 401, and the adjusting device 50 can drive the bracket 60 to horizontally move along the upper surface 401. The first direction and the second direction may be two directions parallel to the upper surface 401 and perpendicular to each other, and the third direction is a vertical direction perpendicular to the horizontal plane.

The bracket 60 may include a first support plate 61, a second support plate 62, and a third support plate 63, and the first support plate 61 and the second support plate 62 may each have a square plate-shaped structure, and one side of the first support plate 61 and one side of the second support plate 62 may be connected together. The third support plate 63 may have a triangular plate-like structure and connect the first support plate 61 and the second support plate 62 to enhance structural stability of the bracket 60. The first support plate 61 is connected to the adjusting means 50 and may be arranged parallel to the upper surface 401. The second support plate 62 may form a certain angle with the first support plate 61, for example, the second support plate 62 may be 90 ° with the second support plate 62 and vertically disposed along the third direction.

The force applying devices 70 are in one-to-one correspondence with the brackets 60, and each bracket 60 is provided with one force applying device 70. The first support plate 61 may have a through hole formed therein, and the force application device 70 is disposed through the through hole along the third direction, so as to save installation space and facilitate application of force to the battery 200 to be tested. The force application device 70 is slidably coupled to the second bracket 62 such that the force application device 70 can move relative to the bracket 60 when a force is applied to the battery 200.

In the torsional strength testing device 2000 of the embodiment of the present application, the adjusting device 50 drives the bracket 60 to move along the first direction and the second direction, and the bracket 60 carries the force application device 70, so that the force application device 70 can move in a large range along the first direction and the second direction, thereby effectively expanding the size range of the battery 200 applicable to the torsional strength testing device 2000 and improving the compatibility of the same device to different batteries 200.

Referring to fig. 4-7, in some embodiments, the adjusting device 50 includes a first adjusting mechanism 51 and a second adjusting mechanism 52 disposed on the first adjusting mechanism 51, where the first adjusting mechanism 51 is disposed on the base 40 and is used to drive the second adjusting mechanism 52 to move in a first direction to drive the bracket 60 to move in a first direction, and the second adjusting mechanism 52 is used to drive the bracket 60 to move in a second direction.

Specifically, the first adjusting mechanism 51 is fixedly mounted on the base 40, and the first adjusting mechanism 51 extends at least partially along the first direction. The second adjustment mechanism 52 is stacked on the first adjustment mechanism 51, the second adjustment mechanism 52 extending at least partially in the second direction. The first adjusting mechanism 51 and the second adjusting mechanism 52 are overlapped on the base 40, and the first adjusting mechanism 51 and the second adjusting mechanism 52 may be fixedly connected by a fastener such as a bolt.

The first adjusting mechanism 51 may limit the movement of the second adjusting mechanism 52 in the first direction by a structure such as a slide rail, a slide groove, a conveyor belt, etc., and the second adjusting mechanism 52 may limit the movement of the bracket 60 in the second direction by a structure such as a slide rail, a slide groove, a conveyor belt, etc.

The first adjusting mechanism 51 and the second adjusting mechanism 52 can jointly adjust the position of the bracket 60 and the force applying device 70 on the bracket 60 in the first direction and the second direction, so that the position of the force applying device 70 and the force applying point for applying the force to the battery 200 match the size of the battery 200 to be tested. The adjustment range of the first adjustment mechanism 51 and the second adjustment mechanism 52 should be not smaller than the dimensional change range of the battery 200 to be tested. For example, the square battery 200 may have a length ranging from 145mm to 310mm and a width ranging from 25mm to 95mm, the difference between the maximum length and the minimum length of the square battery 200 being 165mm, and the difference between the maximum width and the minimum width of the square battery 200 being 70mm. Accordingly, when the square battery 200 has a wide side arranged in the first direction and a long side arranged in the second direction, the first adjusting mechanism 51 drives the second adjusting mechanism 52 to move in the first direction by a distance of 70mm or more, and the second adjusting mechanism 52 drives the bracket 60 to move in the second direction by a distance of 165mm or more.

As such, the second adjustment mechanism 52 is driven to move in the first direction by the first adjustment mechanism 51, and the second adjustment mechanism 52 drives the bracket 60 to move in the second direction, so that the bracket 60 has a degree of freedom of movement in the first direction and the second direction, so that the force application device 70 can move with the bracket 60 to match the size of the battery 200 in the first direction and the second direction.

Referring to fig. 4 and 8, in some embodiments, the first adjusting mechanism 51 includes a first slide rail 511 and a first slider 512 slidably disposed on the first slide rail 511, the first slide rail 511 extends along a first direction, and the second adjusting mechanism 52 is fixed on the first slider 512.

Specifically, the first sliding rail 511 is fixed on the base 40, and the first sliding rail 511 and the base 40 may be fixedly connected by using a fastener such as a bolt. The first sliding rail 511 may be a linear sliding rail, and the first sliding block 512 may slide on the first sliding rail 511 along an extending direction of the first sliding rail 511, that is, a first direction. One side surface of the first slider 512 facing away from the first sliding rail 511 is fixedly connected with the mounting plate 523. The mounting plate 523, the second slide rail 521 provided on the mounting plate 523, the second slider 522, the bracket 60, and the force application device 70 provided on the bracket 60 can be moved in synchronization with the first slider 512 in the first direction.

In this way, the first sliding rail 511 and the first sliding block 512 cooperate, so that the first adjusting mechanism 51 can limit the second adjusting mechanism 52 and the bracket 60 to move along the first direction, so as to stably and conveniently adjust the position of the force application device 70 in the first direction.

Referring to fig. 4 and 8, fig. 8 is a schematic diagram illustrating a combination of an adjusting device 50 and a bracket 60 according to an embodiment of the application. In some embodiments, the second adjustment mechanism 52 includes a mounting plate 523, a second slide rail 521, and a second slider 522 slidably disposed on the second slide rail 521, the second slide rail 521 being disposed on the mounting plate 523 and extending in the second direction, and the bracket 60 being fixed to the second slider 522.

Specifically, the mounting plate 523 may have a rectangular plate-like structure, and the long side of the mounting plate 523 may be disposed along the second direction, and the wide side of the mounting plate 523 may be disposed along the first direction. The mounting plate 523 is fixedly connected to the first slider 512 on a side surface facing the base 40, and a plurality of first sliders 512 may be connected to four corners or wide ends of the mounting plate 523. The mounting plate 523 may be mounted on two first slide rails 511 disposed in parallel and spaced apart.

The second slide rail 521 may be a linear slide rail fixedly mounted on a side of the mounting plate 523 facing away from the base 40 and the first slide rail 511. The second slide rail 521 overlaps the first slide rail 511, and it may be that an end of the second slide rail 521 in the second direction overlaps the first slide rail 511. At the overlapping position of the second slide rail 521 and the first slide rail 511, the first slider 512, the mounting plate 523 and the second slide rail 521 are sequentially overlapped from bottom to top, and can be connected by fastening members such as bolts.

The second slider 522 is disposed on a side of the second slide rail 521 facing away from the mounting plate 523, and the second slider 522 is engaged with the second slide rail 521 and can slide along the extending direction of the second slide rail 521, i.e. the second direction. A side surface of the second slider 522 facing away from the second slide rail 521 is fixedly connected to the bracket 60, and the bracket 60 can move in the second direction in synchronization with the second slider 522.

In this way, by the cooperation of the second slide rail 521 and the first slide rail 511, the second adjusting mechanism 52 can restrict the movement of the bracket 60 in the second direction, so that the position of the force application device 70 in the second direction can be adjusted stably and conveniently.

Referring to fig. 4 and 5, in some embodiments, the adjustment device 50 includes a first driving assembly 53, the first driving assembly 53 is mounted on the base 40 and connected to the mounting plate 523, and the first driving assembly 53 is configured to drive the mounting plate 523 to move so as to move the second adjustment mechanism 52 along the first direction.

Specifically, the first drive assembly 53 includes a first handle 531 and a first screw 532. The first handle 531 is fixedly connected to the base 40, and may be disposed at two sides adjacent to the first slide rail 511 among four sides of the base 40. First handle 531 may rotate first screw 532 when a force is applied by a user. The first screw 532 extends straight in the first direction and connects the first handle 531 and the mounting plate 523, and the first screw 532 is so-called parallel to the first slide rail 511. The first screw rod 532 drives the mounting plate 523 to move along the first screw rod 532 when rotating, so that the second slide rail 521, the second slider 522, the bracket 60 and the force application device 70 on the bracket 60 on the mounting plate 523 move along the first direction.

In another example, the first driving component 53 may drive the screw rod or the rotating shaft to rotate through the motor 731, so as to drive the mounting plate 523 to move along the first direction, so that the user can save more effort when adjusting the position of the force application device 70 in the first direction.

In some embodiments, the number of first drive assemblies 53 is multiple, wherein there may be portions of the first drive assemblies 53 coupled to the same mounting plate 523. The plurality of first driving assemblies 53 connected to the same mounting plate 523 may be disposed in parallel with each other.

In this way, the first driving component 53 drives the mounting plate 523 to move along the second direction, so as to adjust the positions of the second adjusting mechanism 52 and the bracket 60 in the first direction, thereby being compatible with different sizes of the battery 200 in the second direction.

Referring to fig. 4 and 7, in some embodiments, the adjustment device 50 includes a second drive assembly 54, the second drive assembly 54 is mounted on a mounting plate 523, the second drive assembly 54 is connected to the bracket 60, and the second drive assembly 54 is configured to drive the bracket 60 to move in the second direction.

Specifically, a second handle 541 and a second screw 542 are included. The second handle 541 is fixedly connected to the mounting plate 523, and may be disposed on two sides adjacent to the second slide rail 521 among four sides of the mounting plate 523. The second handle 541 may rotate the second screw 542 when a force is applied by a user. The second screw 542 extends straight in the second direction, and connects the second handle 541 and the bracket 60, and it can be said that the second screw 542 is disposed parallel to the second slide rail 521. The second screw 542 drives the bracket 60 to move along the second screw 542 when rotating, so that the force application device 70 on the bracket 60 moves along the second direction.

In another two examples, the second driving assembly 54 may drive the screw or the shaft to rotate through the motor 731, so as to drive the mounting plate 523 to move along the second direction, so that the user can save more effort when adjusting the position of the force application device 70 in the second direction.

In this manner, the second driving assembly 54 drives the bracket 60 to move along the second direction relative to the mounting plate 523, so as to adjust the position of the bracket 60 on the second slide rail 521, thereby being compatible with different sizes of the battery 200 in the second direction.

Referring to fig. 6-8, in some embodiments, the mounting plate 523 is provided with a reinforcing structure 5231 on a side facing the base 40.

Specifically, the mounting plate 523 is erected on at least two first sliding rails 511 arranged at intervals, and the mounting plate 523 is in a suspended state between the first sliding rails 511. The reinforcing structure 5231 is disposed at the suspended portion of the mounting plate 523, the reinforcing structure 5231 may be formed by gradually increasing the thickness from the connection portion of the mounting plate 523 and the first sliding rail 511 to the middle portion of the mounting plate 523 in the second direction, and the reinforcing structure 5231 may be in an arch shape protruding toward the base 40.

In this way, by providing the reinforcing structure 5231 on the side of the mounting plate 523 facing the base 40, the strength of the second adjusting mechanism 52 is increased, so that the second slide rail 521 is kept straight, thereby ensuring the overall stability and the adjusting accuracy of the adjusting device 50. In addition, the reinforcing structure 5231 is disposed on a side of the mounting plate 523 away from the second slide rail 521, so as to avoid interfering with the movement of the bracket 60.

Referring to fig. 5 and 8, in some embodiments, the number of the first sliding rails 511 is at least two, the at least two first sliding rails 511 are arranged in parallel and at intervals along the second direction, and the mounting plate 523 is mounted on the at least two first sliding rails 511.

Specifically, the number of the first sliding rails 511 may be two, three, four, six, eight, or the like. The number of the first sliding rails 511 is two, and the two first sliding rails 511 are arranged in parallel and spaced along the second direction, and may be disposed on two opposite sides of the base 40 along the second direction. The mounting plate 523 may be mounted on the two first slide rails 511.

In another example, the number of the first sliding rails 511 is four, and the four first sliding rails 511 may be divided into two groups, and two first sliding rails 511 of the same group are disposed at the same side in the first direction of the support platform 80. The first sliding rails 511 on the same side of the support platform 80 are disposed opposite to each other along the second direction. In this embodiment, the number of the mounting plates 523 is two, and the two mounting plates 523 are respectively disposed on two sides of the supporting platform 80 along the first direction and are mounted on two first sliding rails 511 on the same side of the supporting platform 80. Further, the four first sliding rails 511 may be disposed on two opposite sides of the base 40 along the second direction, and the two first sliding rails 511 disposed on the same side of the base 40 extend along the same straight line in the first direction.

In this way, the at least two first sliding rails 511 are arranged in parallel and at intervals along the second direction, and the mounting plate 523 is erected on the first sliding rails 511 arranged in parallel and at intervals along the first direction, so that the flatness and stability of the mounting plate 523 are increased.

Referring to fig. 9 and 10, fig. 9 is a schematic structural view of a force applying device 70 according to an embodiment of the present application, and fig. 10 is an exploded structural view of the force applying device 70 according to an embodiment of the present application, in which an actuating mechanism 73 is omitted. In some embodiments, the force application device 70 includes a locking member 71, the locking member 71 being located at an end of the force application device 70 in the third direction, the locking member 71 being configured to couple with the battery 200.

Specifically, the locking member 71 may have a columnar shape and include two end faces opposed in the third direction. The end of the locking member 71 remote from the bracket 60 in the third direction may be provided with an internal thread and be locked with the battery 200 to be tested by screw connection. The connection position of the battery 200 to be tested and the locking member 71 is the application point of the force applied by the force application device 70 to the battery 200. The positions of the force application points correspond one-to-one to the positions of the locking members 71, i.e. the positions of the force application means 70. When the force application device 70 applies a force in the third direction to the battery 200, the battery 200 may deform or displace at the point of application. Since the locking member 71 is firmly connected to the battery 200, the locking member 71 is synchronously displaced with the corresponding point of application of force on the battery 200.

In some embodiments, the test device 2000 includes a plurality of force applying devices 70, and by adjusting the positions of the force applying devices 70 in the first direction and the second direction to correspond to the positions of the battery 200 to be tested under the actual driving condition, and further applying a force to the connection between the locking member 71 and the battery 200 according to the magnitude and the direction of the force applied under the driving condition in the corresponding positions, the test device 2000 can simulate the situation that the battery 200 is subjected to the torsion force under the actual driving condition.

In this way, by providing the locking member 71 at the end of the force application device 70 in the third direction to connect with the battery 200, the force application device 70 is ensured to be stably connected with the battery 200 during the test, and the force applied to the battery 200 in the third direction is maintained.

Referring to fig. 10, in some embodiments, the force application device 70 includes a movable component 72, where the movable component 72 is connected to the locking member 71, and the movable component 72 is configured to compensate for displacement of the locking member 71 in the first direction and/or the second direction when the force application device 70 drives the battery 200 to move in the third direction.

Specifically, when the force application device 70 applies a force to the battery 200 in the third direction, the battery 200 is deformed to generate a certain displacement, for example, the corners of the battery 200 are tilted or curled, so as to drive the locking member 71 to generate displacements in the first direction, the second direction and the third direction. In order to prevent the locking member 71 from being displaced in the first direction and the second direction during the test, the force application device 70 is provided with a movable assembly 72 for driving the locking member 71 to move in the third direction while being displaced in the opposite direction to the curling or tilting of the battery 200, compensating for the displacement of the locking member 71 in the first direction and/or the second direction.

In this manner, the movable assembly 72 compensates for displacement of the locking member 71 in the first direction and/or the second direction when the force application device 70 applies a force to the battery 200, thereby preventing the force application device 70 from being excessively deformed during the test, and protecting the test apparatus 2000.

Referring to fig. 9 and 10, in some embodiments, the movable assembly 72 includes a fixed member 721 and a movable member 722 movably connected to the fixed member 721 through a spherical pair, the movable member 722 is fixedly connected to the locking member 71, and the movable member 722 is configured to compensate for displacement of the locking member 71 in the first direction and/or the second direction when the locking member 71 moves in the third direction.

Specifically, the fixing member 721 may be a nut 7211, and the movable member 722 may be a ball bearing 7222. The ball bearing 7222 includes a plurality of spherical rolling elements arranged around an axial center, and the fixed member 721 is in contact with and connected to the movable member 722 via the spherical rolling elements. The axis of the movable member 722 is vertically disposed along the third direction, and a plurality of spherical pairs are formed between the fixed member 721 and the movable member 722, which are arranged around the axis of the fixed member 721 and are also distributed along the horizontal planes where the first direction and the second direction are located. The movable member 722 is fixedly connected with the locking member 71, and can synchronously move along with the locking member 71 when the locking member 71 moves, and under the condition that the battery 200 curls or tilts, the movable member 722 and the fixed member 721 are extruded in the first direction and the second direction to cause the rolling body to rotate, so that the movable member 722 is driven to move in the opposite direction of the battery 200 curling or tilting through the position change of the spherical pair, and the displacement of the locking member 71 along the first direction and/or the second direction is further compensated.

In this way, the fixed member 721 and the movable member 722 in the movable assembly 72 are movably connected by a spherical pair, and the movable member 722 is fixedly connected with the locking member 71, so that the movable member 722 can drive the locking member 71 to move along the first direction and the second direction relative to the fixed member 721, thereby compensating the displacement of the locking member 71 and the battery 200 in the first direction and/or the second direction.

Referring to fig. 9 and 10, in some embodiments, the fixing member 721 is sleeved outside the movable member 722, and the movable member 722 is sleeved at an end of the locking member 71 away from the battery 200.

Specifically, the movable member 722 and the fixed member 721 may each have a hollow cylindrical or disc shape, and the locking member 71, the movable member 722, and the fixed member 721 are sequentially sleeved from top to bottom in the third direction. The locking member 71, the movable member 722, and the fixed member 721 may be coaxial in the third direction. The movable member 722 is a ball bearing 7222, and the rolling bodies in the ball bearing 7222 may be ends of the locking member 71 away from the battery 200 circumferentially around the locking member 71. The fixing member 721 is a fastening nut 7211, and is sleeved outside the movable member 722 and the end portion of the locking member 71 away from the battery 200. When the force applying device 70 applies a force in the third direction to the battery 200 through the locking member 71, the fixing member 721 forms a centripetal pressing force on the movable member 722 and the locking member 71 to move the movable member 722 and the locking member 71 in the second direction and/or the third direction.

In this way, the fixing member 721 is sleeved outside the movable member 722, and the movable member 722 is sleeved on the locking member 71, so that the force application device 70 is compact in structure, and space is saved. In addition, such a design is advantageous in that the fixing member 721, the movable member 722, and the locking member 71 are kept coaxial, and the consistency of the force applied by the force applying device 70 and the displacement direction of the battery 200 is ensured.

Referring to fig. 9 and 10, in some embodiments, force device 70 includes an actuator mechanism 73 and a connecting assembly 74, connecting assembly 74 is coupled to a securing member 721, actuator mechanism 73 is mounted to bracket 60 and coupled to connecting assembly 74, and actuator mechanism 73 is configured to provide a third directional force to battery 200 via connecting assembly 74 and locking member 71.

Specifically, the actuating mechanism 73 may be a mechanism or device capable of providing motive force for an electric motor 731, a hydraulic press, an air pump, etc. The locking member 71, the movable member 72, the connection member 74, and the actuating mechanism 73 may be disposed in this order from top to bottom in the third direction, and the actuating mechanism 73 may push or pull the battery 200 connected to the locking member 71 upward or downward in the third direction. The actuating mechanism 73 may be disposed through a through hole in the first support plate 61, and one side of the actuating mechanism 73, which is close to the battery 200, is fixedly connected to the fixing member 721 through the connecting member 74, and may move synchronously with the connecting member 74, the movable member 72 and the locking member 71.

In the case that the number of the force applying devices 70 is plural, the actuating mechanism 73 of each force applying device 70 can independently output different acting forces, so that each force applying device 70 can independently control the displacement magnitude and the displacement speed of the battery 200 at the corresponding force applying point.

In this way, by connecting the actuator 73 to the connection assembly 74, the connection assembly 74 is connected to the fixing member 721, and the fixing member 721 is fixedly connected to the locking member 71, so that the actuator 73 can control the force applying device 70 to apply the force in the third direction to the battery 200.

Referring to fig. 9 and 10, in some embodiments, the connection assembly 74 includes a connection seat 741 and a bearing sleeve 742 connected to the connection seat 741, and the fixing member 721 is fixedly disposed in the bearing sleeve 742, and the connection seat 741 is connected to the actuating mechanism 73.

Specifically, connector 741 includes a connector bracket 7411 and a connector sleeve 7412 fixedly mounted in connector bracket 7411. The connection frame 7411 is fixedly coupled to the third slider 782, and the connection frame 7411 is formed with a hollow installation space in the third direction to accommodate the connection sleeve 7412. One end of the connecting sleeve 7412 is fixedly connected with the connecting frame 7411, the connecting sleeve 7412 can be formed with annular fins to be clamped with the connecting frame 7411, and the other end of the connecting sleeve 7412 is connected with the bearing sleeve 742 or the actuating mechanism 73. The connecting sleeves 7412 may be provided in two, the two connecting sleeves 7412 being arranged in the third direction, the connecting sleeve 7412 located above being connected to the carrier sleeve 742, and the connecting sleeve 7412 located below being connected to the actuating mechanism 73.

The bearing sleeve 742 has a hollow cylindrical structure, and a through hole is formed between both end surfaces in the third direction. The locking member 71, the movable member 722 and the fixed member 721 are sleeved together and mounted in the carrier sleeve 742.

In this way, the connecting seat 741 is connected to the carrier sleeve 742 and the actuator 73, and the fixing member 721 is fixedly disposed in the carrier sleeve 742, so that the connection between the actuator 73 and the connecting member 74 and the fixing member 721 are stabilized, and the actuator 73 can stably apply a force to the battery 200 through the fixing member 721 and the connecting member 74.

Referring to fig. 10, in some embodiments, force device 70 includes a pressure sensor 75, pressure sensor 75 coupled to a connection block 741 and a bearing sleeve 742 for detecting the force applied by actuation mechanism 73 to battery 200.

Specifically, the pressure sensor 75 may be hollow, cylindrical and disc, the bearing sleeve 742 may be sleeved outside the pressure sensor 75, and the connecting sleeve 7412 may be sleeved inside the pressure sensor 75, so that the structure is compact, and the equipment space is saved. When the actuating mechanism 73 generates a force in the third direction, the connection seat 741 first receives the force and transmits the force to the pressure sensor 75 and the movable assembly 72 and the locking member 71 in the bearing sleeve 742, thereby applying the force to the battery 200 through the locking member 71. The pressure sensor 75 is disc-shaped and has a third direction as a central axis, so that the force applied by the actuating mechanism 73 in the third direction can be sensed sufficiently.

In this manner, the connection seat 741 and the bearing sleeve 742 are connected by the pressure sensor 75, so that the acting force applied by the actuating mechanism 73 to the connection assembly 74 is detected immediately, and the stress state of the battery 200 during the test is confirmed.

Referring to fig. 9 and 10, in some embodiments, the force application device 70 includes an elastic component 76, where the elastic component 76 connects the movable member 722 with the connection seat 741, and is configured to apply an elastic force in a third direction to the movable member 722.

Specifically, the elastic assembly 76 includes a structure or device capable of generating an elastic force by elastic deformation. In one example, the elastic assembly 76 includes a tension spring 761 and a tension spring holder 762, and one end of the tension spring 761 in the third direction is connected to the tension spring holder 762 and is installed in the connection holder 741 through the tension spring holder 762. An end of the tension spring 761 remote from the tension spring seat 762 may be connected with the movable member 722. When the actuating mechanism 73 applies a force in the third direction, the tension spring 761 is deformed, and the tension spring 761 can be stretched or compressed in the third direction opposite to the direction in which the actuating mechanism 73 applies a force, while torsion is generated between the movable member 722 and the fixed member 721 to compensate for the offset of the locking member 71. When the actuating mechanism 73 removes the force, the tension spring 761 resumes the deformation, thereby applying an elastic force to the movable member 722 in the third direction opposite to the force applied by the actuating mechanism 73, so that the movable member 722 and the fixed member 721 resume the relative alignment before the compensation displacement.

In this way, the movable member 722 and the connection seat 741 are connected by the elastic member 76, and an elastic force in the third direction is applied to the movable member 722, so that the force application device 70 can be automatically reset after the test is completed and the force application device 70 removes the force applied to the battery 200.

In some embodiments, the force application device 70 includes a third slide rail 781 and a third slider 782 slidably connected to the third slide rail 781, the third slide rail 781 being connected to the bracket 60 and extending in a third direction, the third slider 782 being connected to the connection base 741.

Specifically, the third slide rail 781 is disposed on the second support plate 62, and can be fixedly connected to the second support plate 62 and the third support plate 63 by fasteners such as bolts. The third slide rail 781 extends straight in the third direction, and the third slider 782 slides in the extending direction of the third slide rail 781, that is, in the third direction with respect to the third slide rail 781 and the bracket 60. One side of the third sliding block 782, which is away from the third sliding rail 781, is fixedly connected with the connecting seat 741, and drives the connecting seat 741, the movable assembly 72 arranged on the connecting seat 741 and the locking member 71 to synchronously move with the third sliding block 782 in the third direction.

As such, by the engagement of third slide rail 781 and third slider 782, third slide rail 781 is coupled to bracket 60 and extends in a third direction, and third slider 782 is coupled to coupling seat 741, thereby limiting displacement of force applying device 70 in the third direction when a force is applied to battery 200.

Referring to fig. 4 and 5, in some embodiments, the force application devices 70 are plural, and the plural force application devices 70 are spaced apart.

Specifically, the point of application of the torsion force to the battery 200 to be tested under the running condition can be known through simulation or in the test of the vehicle 1000 actually carrying the battery 200. The points of application of torsional forces to battery 200 during driving conditions may be one, two, three, four, six, eight, or more than eight. The number of the force applying devices 70 is plural and is the same as the number of points of application of torsion force to the battery 200 under the running condition, and each force applying device 70 may be disposed corresponding to one point of application. The brackets 60 are in one-to-one correspondence with the force application devices 70, and the force application devices 70 are arranged on the same or different second slide rails 521 at intervals along the first direction and the second direction through the brackets 60.

In one example, the number of the second slide rails 521 is four, wherein two second slide rails 521 are disposed on the same side of the support platform 80, and the other two second slide rails 521 are disposed on the other side of the support platform 80 along the first direction. The second slide rails 521 disposed on the same side of the support platform 80 are juxtaposed and spaced apart a small distance. The bracket 60 may be erected on two second slide rails 521 on the same side of the support platform 80, the first support plate 61 is connected to the two second slide rails 521, the through hole of the first support plate 61 is formed between the two second slide rails 521 on the same side, and the actuating mechanism 73 may pass through the middle of the two second slide rails 521. The same bracket 60 is connected through the two second slide rails 521, so that the flatness and stability of the bracket 60 are enhanced. Further, a plurality of brackets 60 and force applying devices 70 may be provided on the two second slide rails 521 on the same side.

In the case where the number of the force applying devices 70 and the brackets 60 is plural, the number of the second driving assemblies 54 is the same as the number of the force applying devices 70, and each bracket 60 is individually connected to one set of the second driving assemblies 54.

In this way, the force applied to the battery 200 by the force application device 70 can simulate the actual stress condition of the battery 200 under the driving condition by the plurality of force application devices 70 at intervals, so that the reliability of the test result is improved.

Referring again to fig. 4, in some embodiments, the testing apparatus 2000 further includes a support platform 80, the support platform 80 is disposed on the base 40, the adjusting device 50 and the stand 60 are distributed on one side of the support platform 80, and the support platform 80 is used for placing the battery 200.

Specifically, the support platform 80 includes a support base 81 and a support plate 82 coupled to the support base 81. The supporting seat 81 may be rectangular or square, and is fixedly connected with the base 40, and an end surface of the supporting seat 81 facing away from the base 40 may be higher than the base 40 by a certain distance along the third direction. The height of the support base 81 above the base 40 may be approximately the height of the locking member 71 of the force application device 70 above the base 40.

The support plate 82 is provided on an end surface of the support base 81 facing away from the base 40, and is used for placing the battery 200. The support plate 82 is coupled to a third drive assembly 84, and the third drive assembly 84 is configured to drive the support plate 82 in the first direction and/or the second direction relative to the battery 200. The support plate 82 is provided with a plurality of guide grooves 83, the guide grooves 83 are spaced apart in the first direction and/or the second direction, and the guide grooves 83 are used for limiting the direction and distance of the relative movement when the battery 200 and the support plate 82 generate relative movement.

The battery 200 is placed on the support platform 80 before the test device 2000 tests the battery 200. The position of the force application device 70 in the first direction and the second direction is then adjusted and the locking member 71 is locked with the battery 200. The support platform 80 is then disengaged from the battery 200, and the battery 200 is kept in motion and tested for torsional strength solely by the force applied by the force application device 70.

In this way, the adjusting device 50 and the bracket 60 are distributed on one side of the supporting platform 80 through the supporting platform 80 arranged on the base 40, so that when the battery 200 to be tested is placed on the supporting platform 80, the adjusting device 50 can adjust the application point of the application force applied by the application device 70 to the battery 200 according to the actual size of the battery 200, the operation is convenient, and the application position is more accurate.

In a second aspect, the present application provides a battery testing method implemented using the testing apparatus 2000 of any of the above embodiments.

Referring to fig. 11, the battery testing method according to the embodiment of the application includes the following steps:

Step S10, controlling the force application device 70 to apply a force to the battery 200;

Step S20, obtaining displacement data of the battery 200;

Step S30, acquiring the acting force applied by the force application device 70 to the battery 200;

step S40, determining the torsion strength test result of the battery 200 according to the corresponding relationship between the displacement data and the applied force.

In step S10, the actuating mechanism 73 is connected to the CPU and the PLC controller through the ethernet interface, and by inputting the magnitude and direction of the force that the battery 200 may receive under the actual driving condition to the CPU and/or the PLC controller, the actuating mechanism 73 is controlled to apply a force that can simulate the stress condition under the driving condition to the battery 200 to be tested. In some embodiments, force application device 70 may also apply a regularly varying force to battery 200, for example, by controlling force application device 70 to apply a progressively increasing pressure to battery 200 in a third direction.

In some embodiments, different force application devices 70 may be controlled individually by different actuation mechanisms 73 to apply different forces at different points of application. For example, two force application devices 70 located on the same side of the support platform 80 apply opposite compressive and tensile forces in a third direction to the two corners of the side of the battery 200, respectively, and the torsional strength of the battery 200 at that side is tested.

In step S20, the battery 200 deforms under tension or pressure, and the point of application of the force is displaced in the same direction as the direction in which the force application device 70 applies the force. Displacement data in the third direction generated at the point of application of the force by the force application device 70 after the battery 200 is subjected to the force application is detected by the displacement sensor.

In step S30, the force application device 70 may transmit the force data actually applied to the battery under test 200 to the PLC controller through the actuating mechanism 73, and the PLC controller transmits the force data actually applied to the battery under test 200 by the force application device 70 to the CPU. The actual force data applied to the battery under test 200 may include the location of the point of application, the magnitude and direction of the force, and the time the force was applied.

In step S40, the relationship between the displacement data and the applied force is obtained by combining the relationship between the displacement data and time of the same point of application and the relationship between the applied force and time of the force application device 70, so as to be intuitively judged by the tester.

In some embodiments, the predetermined displacement allowed to occur in the power cell 200 under the torsional force may be determined according to the torsional strength that the cell 200 needs to achieve when actually driving. If the displacement data of the tested battery 200 when the applied force reaches or exceeds the applied force of the battery 200 under the actual driving condition is smaller than or equal to the preset displacement, the tested battery 200 is determined to pass the torsional strength test. If the displacement data of the tested battery 200 when the applied force reaches or exceeds the applied force of the battery 200 under the actual driving condition is greater than the preset displacement, it is determined that the tested battery 200 fails the torsional strength test.

The battery testing method according to the second aspect of the present application is implemented by using the testing apparatus 2000 according to the first aspect of the present application, so that the battery testing method has all the advantages of the testing apparatus 2000, and has high testing reliability and good compatibility with batteries 200 of different sizes.

Referring to fig. 12, in some embodiments, the battery testing method further comprises:

Step S50, the size and the direction of the acting force of the battery 200 under the driving working condition are obtained;

step S60, controlling the force application device 70 to apply the force with the same magnitude and direction as the force applied by the battery 200 under the driving condition;

step S70, obtaining noise decibels generated by the battery 200;

step S80, determining the torsion strength test result of the battery 200 according to the noise decibel generated by the battery 200.

In step S50, the magnitude and direction of the applied force of the battery 200 under the driving condition may be obtained through a driving test or simulation of the vehicle 1000 on which the battery 200 to be tested is mounted. The force obtained in step S50 refers to the compressive or tensile force that the battery 200 receives in the third direction, that is, the force that can cause the battery 200 to twist. Step S50 may be performed before step S10.

In step S60, the magnitude and direction of the applied force of the battery 200 under the driving condition are input by the CPU, and then the magnitude and direction of the applied force required to be applied at each application point in a single test can be transmitted to the corresponding application device 70 of the application point by the PLC controller, so that the application device 70 is controlled to apply the applied force with the same magnitude and direction as those under the driving condition to the corresponding application point of the tested battery 200, and the stress condition of the battery 200 under the driving condition is simulated. Step S10 and step S60 may be performed synchronously.

In step S70, the noise decibel generated by the battery 200 after the displacement generated by the applied force is detected by the decibel meter. Step S70 may be performed after step S10 or step S60, and may be performed in synchronization with step S20, step S30, or step S40. In other embodiments, step S70 may be performed before or after step S20 and before step S40.

In step S80, when the battery 200 is displaced by the force, that is, deformed, the battery end cover 30 may deviate from the housing greatly, which may cause abnormal rattling of the vehicle 1000 during driving, so that it is necessary to detect the noise db generated after the torsional strength test of the battery 200 and determine whether the battery 200 passes the torsional strength test according to the noise db.

In this way, the force condition of the battery 200 under the driving working condition is obtained, and the force application device 70 is controlled to apply the acting force with the same magnitude and direction as those under the driving working condition to the battery 200, so that the driving working condition is simulated for testing, and the reliability of the testing result is ensured. The noise decibels generated in the test process of the battery 200 are obtained, and the test result is determined through the noise decibels, so that the battery 200 is ensured not to cause noise interference under the running working condition.

Referring to fig. 13, in some embodiments, determining the torsional strength test result of the battery 200 according to the noise decibels generated by the battery 200 includes:

Step S81, if the noise decibel generated by the battery 200 is higher than the preset decibel, determining that the torsional strength test of the battery 200 is not passed;

In step S82, if the noise db generated by the battery 200 is less than or equal to the preset db, it is determined that the torsional strength test of the battery 200 is passed.

Specifically, the preset decibels are decibel values of abnormal rattle that can be recognized by the occupants and drivers of the vehicle 1000 during running of the vehicle 1000.

In step S81, if the noise db generated by the battery 200 is higher than the preset db, it can be inferred that the tested battery 200 will generate larger deformation and deflection due to insufficient torsional strength during the running of the vehicle 1000, and thus generate abnormal rattling to cause the road test of the vehicle 1000 to fail.

In step S82, if the noise db generated by the battery 200 is less than or equal to the preset db, it can be inferred that the torsion strength of the tested battery 200 is sufficient during the running of the vehicle 1000, the deformation and the deflection generated by the battery 200 when the battery is subjected to the torsion force are small, and no abnormal rattle is generated, or the noise db generated is low enough to be recognized as abnormal rattle, so that the vehicle 1000 can pass the road test smoothly.

In this way, when the noise decibel generated by the battery 200 is higher than the preset decibel, it is determined that the torsional strength test of the battery 200 is not passed, and when the noise decibel generated by the battery 200 is smaller than or equal to the preset decibel, it is determined that the torsional strength test of the battery 200 is passed, so that the noise generated by the battery 200 in the actual driving process is lower than the noise standard identified by the human ear, and the driving experience is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A test apparatus for testing torsional strength of a battery, the test apparatus comprising:

a base;

the adjusting device is arranged on the base;

the support is arranged on the adjusting device and used for driving the support to move along a first direction and a second direction; and

The force application device is arranged on the bracket and is used for being connected with the battery and applying force to the battery along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The test apparatus of claim 1, wherein the adjustment device comprises a first adjustment mechanism and a second adjustment mechanism disposed on the first adjustment mechanism, the first adjustment mechanism disposed on the base and configured to drive the second adjustment mechanism to move in the first direction to drive the support to move in the first direction, the second adjustment mechanism configured to drive the support to move in the second direction.

3. The test apparatus of claim 2, wherein the first adjustment mechanism comprises a first slide rail and a first slider slidingly disposed on the first slide rail, the first slide rail extending in the first direction, the second adjustment mechanism being secured to the first slider.

4. A test apparatus according to claim 3, wherein the second adjustment mechanism comprises a mounting plate, a second slide rail and a second slider slidingly disposed on the second slide rail, the second slide rail being disposed on the mounting plate and extending in the second direction, the bracket being secured to the second slider.

5. The test apparatus of claim 4, wherein the adjustment device comprises a first drive assembly mounted on the base and coupled to the mounting plate, the first drive assembly for driving movement of the mounting plate to move the second adjustment mechanism in the first direction.

6. The test apparatus of claim 5, wherein the adjustment device comprises a second drive assembly mounted on the mounting plate, the second drive assembly coupled to the carriage, the second drive assembly configured to drive the carriage to move in the second direction.

7. The test apparatus of claim 4, wherein a side of the mounting plate facing the base is provided with a reinforcing structure.

8. The test apparatus of claim 4, wherein the number of first slide rails is at least two, the at least two first slide rails are arranged in parallel and at intervals along the second direction, and the mounting plate is mounted on the at least two first slide rails.

9. The test apparatus of claim 1, wherein the force application device comprises a locking member located at an end of the force application device in the third direction, the locking member for connection with the battery.

10. The test apparatus of claim 9, wherein the force application device comprises a movable assembly coupled to the locking member, the movable assembly configured to compensate for displacement of the locking member in the first direction and/or the second direction when the force application device drives the battery to move in the third direction.

11. The test device of claim 10, wherein the movable assembly comprises a fixed member and a movable member movably connected to the fixed member via a spherical pair, the movable member being fixedly connected to the locking member, the movable member being configured to compensate for displacement of the locking member in the first direction and/or the second direction when the locking member is moved in the third direction.

12. The test apparatus of claim 11, wherein the stationary member is disposed outside the movable member, and the movable member is disposed at an end of the locking member remote from the battery.

13. The test apparatus of claim 11, wherein the force applying device comprises an actuating mechanism and a connecting assembly, the connecting assembly being coupled to the fixture, the actuating mechanism being mounted on the bracket and coupled to the connecting assembly, the actuating mechanism being configured to provide the third directional force to the battery via the connecting assembly and the locking member.

14. The test apparatus of claim 13, wherein the connection assembly comprises a connection block and a carrier sleeve coupled to the connection block, the fixture being fixedly disposed in the carrier sleeve, the connection block being coupled to the actuation mechanism.

15. The test apparatus of claim 14, wherein the force applying means comprises a pressure sensor connecting the connection seat and the carrier sleeve and adapted to detect the force applied by the actuation mechanism to the battery.

16. The test apparatus of claim 14, wherein the force application device comprises an elastic assembly connecting the movable member and the connection seat and adapted to apply an elastic force in the third direction to the movable member.

17. The test apparatus of claim 14, wherein the force application device comprises a third slide rail and a third slider slidably coupled to the third slide rail, the third slide rail coupled to the bracket and extending in the third direction, the third slider coupled to the connection block.

18. The test apparatus of claim 1, wherein the number of force applying devices is plural, and the plurality of force applying devices are spaced apart.

19. The test apparatus of claim 1, further comprising a support platform disposed on the base, the adjustment device and the bracket being distributed on one side of the support platform, the support platform being configured to hold the battery.

20. A battery testing method, characterized in that the battery testing method is implemented with the testing apparatus of any one of claims 1 to 19, the battery testing method comprising:

Controlling the force application device to apply a force to the battery;

Acquiring displacement data of the battery;

Acquiring acting force applied by the force application device to the battery;

21. The battery testing method of claim 20, further comprising:

Acquiring the size and direction of acting force of the battery under a driving condition;

controlling the force application device to apply acting force with the same magnitude and direction as those of the running working condition to the battery;

acquiring noise decibels generated by the battery;

and determining a torsional strength test result of the battery according to the noise decibel generated by the battery.

22. The method of claim 21, wherein determining the torsional strength test result of the battery based on the noise decibels generated by the battery comprises:

if the noise decibel generated by the battery is higher than a preset decibel, determining that the torsional strength test of the battery is not passed;

And if the noise decibel generated by the battery is smaller than or equal to the preset decibel, determining that the torsional strength test of the battery is passed.