CN214893117U

CN214893117U - Battery deformation measuring system

Info

Publication number: CN214893117U
Application number: CN202120591692.7U
Authority: CN
Inventors: 卢兰光; 谢颖晨; 黎瑞和
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-11-26
Anticipated expiration: 2031-03-23

Abstract

The application relates to a battery deformation measurement system. The battery deformation measuring system comprises a first shell, a moving device and a detecting device. The first housing encloses a first space. The first housing includes opposing first and second inner surfaces. The second inner surface is used for placing a battery to be tested. The mobile device is accommodated in the first space and is arranged on the first inner surface. The detection device is accommodated in the first space and is arranged on the mobile device. The moving device is used for driving the detection device to move so as to detect the deformation quantity of the surface of the battery to be detected, which is close to the detection device. The detection device is arranged on the mobile device. The moving device can be used for driving the detection device to move from one end of the battery to be detected to the other end of the battery to be detected so as to detect the deformation quantity of the surface of the battery to be detected, which is close to the detection device. The battery deformation measurement system can detect the deformation quantity of the battery to be detected, and the detection precision is improved.

Description

Battery deformation measuring system

Technical Field

The application relates to the technical field of batteries, in particular to a battery deformation measuring system.

Background

During the charging and discharging processes of the battery, chemical reactions occur inside the battery. When the battery is subjected to abuse conditions, such as overcharge, overheating, short-circuiting, etc., the reaction inside the battery is accelerated, and a large amount of gas and heat are generated. The pressure inside the battery increases, causing structural deformation of the battery. By monitoring the deformation of the battery, the state of the battery can be known. The deformation amount is different in different regions of the battery. The problem to be solved is how to improve the detection precision of the deformation quantity of the surface of the battery, because the deformation quantity of one point or a plurality of points of the battery is not enough to know the internal reaction state of the battery.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a battery strain measurement system for solving the problem of how to improve the detection accuracy of the battery surface strain amount.

A battery deformation measuring system comprises a first shell, a moving device and a detecting device. The first housing encloses a first space. The first housing includes opposing first and second inner surfaces. The second inner surface is used for placing a battery to be tested. The mobile device is accommodated in the first space and is arranged on the first inner surface. The detection device is accommodated in the first space, and the detection device is arranged on the mobile device. The moving device is used for driving the detection device to move so as to detect the deformation quantity of the surface of the battery to be detected, which is close to the detection device.

In one embodiment, the mobile device includes a mounting table, a rail, and a power assembly. The mounting table is disposed on the first inner surface. The guide rail is arranged on the surface of the mounting table far away from the first inner surface. The guide rail extends in a first direction. The detection device is arranged on the guide rail.

The power assembly is arranged on the mounting table. The power assembly is in transmission connection with the detection device and is used for driving the detection device to move along the first direction.

In one embodiment, the moving means further comprises a slider. The sliding block is movably connected with the guide rail. The slider sets up in power component's output. The detection device is arranged on the sliding block.

In one embodiment, the moving means further comprises opposing first and second baffles. The first baffle and the second baffle are arranged on the mounting table. The first baffle is arranged at one end of the guide rail. The second baffle is arranged at the other end of the guide rail, and the first baffle and the second baffle are respectively arranged at two sides of the sliding block.

In one embodiment, the power assembly includes a motor and a lead screw. The motor is arranged on one side of the first baffle plate, which is far away from the second baffle plate. The lead screw is arranged between the first baffle and the second baffle, and the extending direction of the lead screw is the same as that of the guide rail. One end of the lead screw is connected with an output shaft of the motor. The other end of the lead screw is connected with the sliding block.

In one embodiment, the battery deformation measuring system further comprises a manual adjusting device. The manual adjusting device is arranged on the motor. The manual adjusting device is connected with the motor. The manual adjusting device adjusts the position of the lead screw by manually adjusting the rotating angle of the output shaft of the motor.

In one embodiment, the detection device includes a detection housing, a laser transmitter, a laser receiver, and a signal processor. The detection shell is arranged on the sliding block. The detection shell surrounds to form a second space, and a first opening and a second opening are formed in the surface, close to the second inner surface, of the detection shell. The laser emitter is accommodated in the second space. And the emission port of the laser emitter is clamped in the first opening. The laser transmitter is used for transmitting laser towards the battery to be tested through the transmitting port. The laser receiver is accommodated in the second space. And the lighting port of the laser receiver is clamped at the second opening. The laser receiver is used for receiving the laser reflected by the battery to be tested through the daylight opening and generating a deformation signal according to the received reflected laser. The signal processor is connected with the laser receiver. And the signal processor is used for receiving the deformation signal and obtaining the deformation quantity of the battery according to the deformation signal.

In one embodiment, the laser emitted by the laser emitter is a line laser. The extending direction of the linear laser is perpendicular to the extending direction of the guide rail.

In one embodiment, the laser plane formed by the laser emitted by the laser emitter forms an acute angle with the second inner surface.

In one embodiment, the battery deformation measurement system further comprises an adapter plate. The adapter plate is arranged on the surface, close to the second inner surface, of the sliding block. The detection device is arranged on the surface of the adapter plate far away from the sliding block.

In one embodiment, the detection device comprises an indicator light. The indicator light is arranged on the detection shell. The indicator light is connected with the signal processor. The indicating lamp is used for indicating the working state of the detection device.

The battery deformation measurement system that this application embodiment provided includes first casing, mobile device and detection device. The first housing encloses a first space. The first housing includes opposing first and second inner surfaces. The second inner surface is used for placing a battery to be tested. The mobile device is accommodated in the first space and is arranged on the first inner surface. The detection device is accommodated in the first space, and the detection device is arranged on the mobile device. The moving device is used for driving the detection device to move so as to detect the deformation quantity of the surface of the battery to be detected, which is close to the detection device. The first housing functions to support the moving device and the detecting device. The detection device is arranged on the mobile device. The mobile device can be used for driving the detection device to move from one end of the battery to be detected to the other end of the battery to be detected so as to detect the deformation quantity of the surface of the battery to be detected, wherein the deformation quantity is close to the detection device. The battery deformation measurement system can detect the deformation quantity of the battery to be detected, which faces to the whole surface of the detection device, and improves the detection precision.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery deformation measurement system provided in an embodiment of the present application;

fig. 2 is a diagram of a relative position of the laser emitted by the detection device toward the battery to be tested according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an interposer provided in an embodiment of the present application.

Reference numerals:

a battery deformation measurement system 10; a first housing 20; a first space 201; a first inner surface 210; a second inner surface 220; a battery 100 to be tested; a moving device 30; a detection device 40; a mounting table 310; a guide rail 320; a first direction a; a slider 330; a power assembly 340; a first baffle 350; a second baffle 360; a motor 341; a lead screw 342; a coupler 343; a fixing member 344; a manual adjustment device 50; a detection housing 410; the second space 411; a first opening 412; the second opening 413; a laser transmitter 420; a laser receiver 430; a signal processor 440; an indicator light 450; a laser plane 101; an adapter plate 60.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

The numbering of the components as such, e.g., "first", "second", etc., is used herein for the purpose of describing the objects only, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, an embodiment of the present application provides a battery deformation measurement system 10, which includes a first housing 20, a moving device 30, and a detection device 40. The first housing 20 encloses a first space 201. The first housing 20 includes opposing first and second

inner surfaces

210 and 220. The second inner surface 220 is used for placing the battery 100 to be tested. The mobile device 30 is received in the first space 201, and the mobile device 30 is disposed on the first inner surface 210. The detecting device 40 is accommodated in the first space 201, and the detecting device 40 is disposed in the moving device 30. The moving device 30 is configured to drive the detecting device 40 to move from one end of the battery 100 to be detected to the other end of the battery 100 to be detected, so as to detect the deformation amount of the surface of the battery 100 to be detected.

The first housing 20 of the battery deformation measuring system 10 provided in the embodiment of the present application plays a role of supporting the moving device 30 and the detecting device 40. The detecting device 40 is disposed on the moving device 30. The moving device 30 is configured to drive the detecting device 40 to move from one end of the battery 100 to be detected to the other end of the battery 100 to be detected, so as to detect the deformation amount of the battery 100 to be detected, which is close to the surface of the detecting device 40. The battery deformation measuring system 10 can detect the deformation amount of the whole surface of the battery 100 to be detected, which faces the detecting device 40, and the detection precision is improved.

The first housing 20 may be a frame structure formed by supporting frames, or a polyhedral structure formed by surrounding a plurality of panels. In one embodiment, the first casing 20 is composed of a top plate, a vertical plate and a bottom plate, and the top plate, the vertical plate and the bottom plate are connected by bolts.

The detection device 40 may be a distance detection device 40 or a position detection device 40. The moving device 30 may move along a straight line or around the battery 100 to be tested.

In one embodiment, the mobile device 30 includes a mounting table 310, a rail 320, and a power assembly 340. The mounting platform 310 is disposed on the first inner surface 210. The guide rail 320 is disposed on a surface of the mounting platform 310 away from the first inner surface 210. The guide rail 320 extends in a first direction a. The detecting device 40 is disposed on the guide rail 320. The power assembly 340 is disposed on the mounting platform 310. The sliding block 330 is disposed on the power assembly 340 and is in transmission connection with the detection device 40. The power assembly 340 is used for driving the detecting device 40 to move along the first direction a.

The mounting stage 310 may be a flat plate structure. The plate structure includes two opposing surfaces, one of which is adapted to engage the first inner surface 210, and the rail 320 engages the other surface of the plate structure. The guide rail 320 may be a linear guide rail 320 or an annular guide rail 320. In one embodiment, the guide rail 320 is a linear guide rail 320 and extends along the first direction a. The slider 330 may move along the guide rail 320. The mounting block 310 may be adhered, welded or bolted to the first housing 20. The projection of the mounting stage 310 toward the first inner surface 210 may be a regular pattern such as a rectangle, a circle, or a square, or may be a pattern formed by splicing a plurality of regular patterns.

In one embodiment, the mobile device 30 further comprises a slider 330. The sliding block 330 is movably connected with the guide rail 320. The sliding block 330 is disposed at the output end of the power assembly 340. The detecting device 40 is disposed on the sliding block 340. The power assembly 340 is configured to drive the sliding block 340 to move along the guide rail 320, so as to drive the detecting device 40 to move along the first direction a. In the working process of the battery deformation measuring system 10, the battery 100 to be measured is disposed on the second inner surface 220, and the battery 100 to be measured extends along the first direction a. The power assembly 340 drives the sliding block 330 and the detecting device 40 to move from one end of the battery 100 to be tested to the other end. In one embodiment, the detecting device 40 collects the distance from the detecting device 40 to the surface of the battery 100 to be tested according to a set frequency. The fluctuation of the surface of the battery 100 can be determined according to the distance to obtain the deformation of the surface of the battery 100.

The existing lithium ion battery deformation measurement scheme is roughly as follows: the thickness gauge is simple in equipment and can only measure large-area deformation; the contact type displacement sensor has higher precision and stress influence, and can only measure a single point; the bilateral contact type displacement sensor has higher precision and stress influence, and can only measure a single point; x-ray, the precision is higher, have damage to the battery; neutron diffraction, the precision is higher, has the damage to the battery. At present, the method for measuring the deformation of the lithium ion battery in the cyclic process is mainly a displacement sensor, but the displacement sensor can only measure the displacement of a certain point or a plurality of points and cannot comprehensively reflect the deformation condition of the surface of the whole battery. This is because the current and voltage distribution is not uniform, and the area of the side reaction cannot be determined, so that the deformation of the battery is not uniform, and it is not reasonable to represent the deformation of the battery by the single-point or overall average deformation in many studies.

In the battery deformation measuring system 10 of the present application, the moving device 30 includes a mounting table 310, a guide rail 320, a slider 330, and a power assembly 340. The power assembly 340 can drive the sliding block 330 and the detecting device 40 to move along the sliding rail. The detection device 40 can move from one end of the battery 100 to be detected to the other end, and the detection device 40 can detect the deformation quantity of the whole surface of the battery 100 to be detected, so that the detection quality is improved.

The top plate of the first housing 20 is preset with bolt holes matched with the mounting table 310, and the first housing 20 and the mounting table 310 are connected more firmly through bolts by means of bolt connection. The moving device 30 is a GCD-203 electric control translation stage.

In one embodiment, the detection device 40 emits laser toward the surface of the battery 100 to be tested, the laser encounters the surface of the battery 100 to be tested and is reflected, and the detection device 40 receives the reflected laser and takes a picture of a receiving window of the reflected laser. And judging the fluctuation condition of the surface of the battery 100 to be measured according to the position of the reflected laser in the picture, and further obtaining the deformation quantity of the surface of the battery 100 to be measured.

In one embodiment, the moving device 30 further includes opposing first and second baffles 350, 360. The first and second shutters 350 and 360 are disposed at the installation stage 310. The first shutter 350 is disposed at one end of the guide rail 320. The second baffle 360 is disposed at the other end of the guide rail 320, and the first baffle 350 and the second baffle 360 are disposed at two sides of the sliding block 330 respectively.

The first and second shutters 350 and 360 serve to limit the total displacement of the slider 330 so that the slider 330 can only move between the two shutters. The first baffle 350 and the second baffle 360 can be regular three-dimensional structures such as a cuboid, a cylinder or a cube, and also can be three-dimensional structures spliced by a plurality of regular three-dimensional structures.

In one embodiment, the power assembly 340 includes a motor 341 and a lead screw 342. The motor 341 is disposed on a side of the first baffle 350 away from the second baffle 360. The motor 341 is also disposed on the mounting table 310. The lead screw 342 is disposed between the first blocking plate 350 and the second blocking plate 360, and an extending direction of the lead screw 342 is the same as an extending direction of the guide rail 320. One end of the screw 342 is connected to an output shaft of the motor 341. The other end of the lead screw 342 is connected to the slider 330. The motor 341 is a power source. The motor 341 outputs power through an output shaft, and then the power is transmitted to the sliding block 330 through the lead screw 342, and the sliding block 330 drives the detection device 40 to move. The rotational direction of the output shaft of the motor 341 determines the rotational direction of the lead screw 342. The rotation direction of the lead screw 342 determines the moving direction of the sliding block 330, thereby affecting the position of the sliding block 330 on the sliding rail. The position of the sliding block 330 on the sliding rail affects the position of the detection device 40, and further affects the position of the surface of the battery 100 to be detected, which is detected by the detection device 40.

In one embodiment, the battery deformation measurement system 10 further includes a coupling 343. One end of the coupling 343 is connected to an output shaft of the motor 341. The other end of the coupling 343 is connected to the lead screw 342. The power of the output shaft of the motor 341 is transmitted to the lead screw 342 through the coupling 343.

In one embodiment, the battery strain measurement system 10 further includes a fixture 344. The fixing member 344 is fixed to the mounting table 310. The center of the fixing member 344 is provided with a through hole. The lead screw 342 passes through the through hole. The fixture 344 also includes a first platform. The coupling 343 is disposed on the first platform. The fixing part 344 can limit the displacement of the screw 342 perpendicular to the axial direction and can fix the coupler 343.

In one embodiment, the battery deformation measurement system 10 further includes a manual adjustment device 50. The manual adjustment device 50 is disposed on the motor 341. The manual adjustment device 50 is connected to the motor 341. The manual adjustment device 50 adjusts the position of the lead screw 342 by manually adjusting the rotation angle of the output shaft of the motor 341. The manual adjusting device 50 is disposed on a side of the motor 341 away from the first blocking plate 350. By manually adjusting the manual adjustment device 50, the rotation angle of the output shaft of the motor 341 can be adjusted, thereby changing the position of the output end of the lead screw 342. The manual adjustment device 50 can be used to initiate the alignment of the measuring position.

Referring to fig. 2, in one embodiment, the detection device 40 includes a detection housing 410, a laser transmitter 420, a laser receiver 430, and a signal processor 440. The detection housing 410 is disposed on the slider 330. The detection housing 410 encloses a second space 411, and a first opening 412 and a second opening 413 are opened on a surface of the detection housing 410 close to the second inner surface 220. The laser transmitter 420 is received in the second space 411. The emitting port of the laser emitter 420 is clamped in the first opening 412. The laser transmitter 420 is configured to transmit laser toward the battery 100 to be tested through the transmission port. The laser receiver 430 is received in the second space 411. The lighting port of the laser receiver 430 is clamped in the second opening 413. The laser receiver 430 is configured to receive the laser reflected by the battery 100 through the daylight opening, and generate a deformation signal according to the received reflected laser. The signal processor 440 is connected to the laser receiver 430. The signal processor 440 is configured to receive the deformation signal and obtain a deformation amount of the battery according to the deformation signal.

In one embodiment, the signal processor 440 may also be connected to the motor 341 and the laser transmitter 420. The signal processor 440 is configured to receive an external command, and control the motor 341 to move and the laser emitter 420 to emit laser according to the external command. The external instructions include operational data of motor 341 and the frequency and power of the laser emission.

In one embodiment, the detection device 40 employs a Gocator2330 line laser profile sensor.

The detection housing 410 is used to provide a mounting platform and a receiving space for the laser transmitter 420 and the laser receiver 430. In one embodiment, the laser receiver 430 has a photographing function. In the working process of the battery deformation measuring system 10, the motor 341 drives the lead screw 342 to rotate, so as to drive the sliding block 330 and the detecting device 40 to move. The laser transmitter 420 emits laser light toward the surface of the battery 100 to be tested. The surface of the battery 100 to be tested reflects the laser to the laser receiver 430. The laser receiver 430 receives the reflected laser light and takes a picture. When the surface of the battery 100 to be tested is convex, the position where the reflected laser light is incident to the laser receiver 430 is shifted. The degree of the protrusion can be judged by the offset.

In one embodiment, the laser emitted by the laser emitter 420 is a line laser. The extending direction of the in-line laser is perpendicular to the extending direction of the guide rail 320. The extending direction of the linear laser is perpendicular to the first direction a. When the slider 330 moves along the first direction a, the in-line laser also moves along the first direction a. If the surface of the battery 100 to be tested irradiated by the in-line laser is flat, the reflected laser received by the laser receiver 430 is still the in-line laser. If the surface of the battery 100 to be tested irradiated by the linear laser is not flat, the reflected laser received by the laser receiver 430 may be a laser curve or a multi-segment line.

In one embodiment, the laser plane 101 formed by the laser emitted from the laser emitter 420 forms an acute angle with the second inner surface 220. The incident angle of the laser plane 101 is not 0, which ensures that the laser light can be reflected to the laser receiver 430.

In one embodiment, the emitting angle of the laser emitter 420 and the receiving angle of the laser receiver 430 may be adjusted. The included angle between the emission angle of the laser emitter 420 and the surface of the battery 100 to be tested, which is close to the detection device 40, is an acute angle.

Referring to fig. 3, in one embodiment, the battery deformation measuring system 10 further includes an interposer 60. The adapter plate 60 is disposed on a surface of the slider 330 close to the second inner surface 220. The detection device 40 is disposed on a surface of the adapter plate 60 away from the slider 330. The adapter plate 60 is used to connect the detection device 40 and the mounting stage 310. The adapter plate 60 is provided with a plurality of bolt holes. The detection device 40 and the mounting table 310 are connected to the adapter plate 60 by bolts passing through the bolt holes.

In one embodiment, the detection device 40 further includes an I/O connector, a LAN connector, an indicator light 450, and a number plate. The I/O connector, the LAN connector, the indicator light 450, and the number plate are disposed on a first surface of the inspection housing 410, respectively, and the first surface is adjacent to a surface on which the laser transmitter 420 and the laser receiver 430 are disposed. The I/O connector is for connection with the signal processor 440. The I/O connector 10 supports input and output signals. The LAN connector 9 supports power and laser safety signals and is connected to an Ethernet network with a transmission rate of 1000 MB/s.

In one embodiment, the indicator light 450 is coupled to the signal processor 440. The indicator light 450 is used for indicating the working state of the detection device 40.

In one embodiment, the indicator lights 450 include a power indicator light 450, a range indicator light 450, and a laser indicator light 450, the power indicator light 450 turns blue when energized, the range indicator light 450 turns green when the laser receiver 430 detects laser light and the object turns green when within the measurement range, and the laser indicator light 450 turns amber when the laser safety input is activated.

The specific implementation process of the battery deformation measuring system 10 includes:

the battery 100 to be tested is a rectangular soft package battery. The laser receiver 430 is a camera. The laser transmitter 420, camera and target form a triangle. Using a known distance between the laser transmitter 420 and the camera and two known angles. One of the angles depends on the position on the camera where the laser is returned to calculate the distance between the sensor and the target, which translates to the height of the target.

The camera observes the laser light reflected from the target point cloud of the battery under test 100, and the laser transmitter 420 emits line laser light to generate a laser profile. The power indicator 450 turns blue when energized, the range indicator 450 turns green when the camera detects laser light and the target object is within the measurement range, and the laser indicator 450 turns amber when laser safety input is activated. The laser scanning line is actually composed of a plurality of points, and is arranged in the y-axis direction, and the y-axis is perpendicular to the first direction a. The laser scanner can record the height of each point on the intersecting line of the laser scanning line and the battery 100 to be tested in real time, namely the thickness of the battery 100 to be tested at the point. During the measurement, the intersection line moves once along the length of the battery 100 to be measured. The signal processor 440 may obtain a two-dimensional matrix corresponding to the thickness data of each point on the entire surface of the battery 100 to be tested. In order to measure the change rule of the deformation of the battery 100 to be measured along with the time, the laser scanning line can move back and forth, and a battery boundary identification method is used. The huge two-dimensional matrix obtained by back scanning can be divided, and each divided two-dimensional matrix can represent the profile data of the battery 100 to be tested at a certain time point. The two-dimensional matrixes are stacked into a three-dimensional matrix, and the change rule of the outline of the battery 3 along with time can be obtained. Laser transmitter 420 projects a laser line onto the battery under test and the camera captures the laser light reflected from the target from an angle. The camera captures the profile of the target where the laser line is projected, i.e. the surface displacement signal, for each exposure. The object to be detected is in a static state, the moving device 30 is used for driving the detecting device 40 to perform reciprocating scanning, and the overall contour of the surface of the object and the change rule of the surface displacement signal along with time can be obtained.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A battery strain measurement system, comprising:

the first shell surrounds to form a first space, and comprises a first inner surface and a second inner surface which are opposite, and the second inner surface is used for placing a battery to be tested;

the mobile device is accommodated in the first space and is arranged on the first inner surface;

the detection device is accommodated in the first space and is arranged on the mobile device, and the mobile device is used for driving the detection device to move so as to detect the deformation quantity of the surface of the battery to be detected.

2. The battery deformation measurement system according to claim 1, wherein the moving means includes:

a mounting table disposed on the first inner surface;

the guide rail is arranged on the surface, far away from the first inner surface, of the mounting table, extends along a first direction, and the detection device is arranged on the guide rail;

the power assembly is arranged on the mounting table and is in transmission connection with the detection device, and the power assembly is used for driving the detection device to move along the first direction.

3. The battery deformation measurement system according to claim 2, wherein the moving means includes:

the slider with guide rail swing joint, the slider set up in power component's output, detection device set up in the slider.

4. The battery strain measurement system of claim 3, wherein the moving means further comprises:

the first baffle and the second baffle are opposite, the first baffle and the second baffle are arranged on the mounting table, the first baffle is arranged at one end of the guide rail, the second baffle is arranged at the other end of the guide rail, and the first baffle and the second baffle are respectively arranged on two sides of the sliding block.

5. The battery strain measurement system of claim 4, wherein the power assembly comprises:

the motor is arranged on one side, far away from the second baffle plate, of the first baffle plate;

the lead screw is arranged between the first baffle and the second baffle and extends along the first direction, one end of the lead screw is connected with an output shaft of the motor, and the other end of the lead screw is connected with the sliding block.

6. The battery strain measurement system of claim 5, further comprising:

and the manual adjusting device is arranged on the motor and connected with the motor, and is used for adjusting the rotating angle of an output shaft of the motor so as to adjust the position of the lead screw.

7. The battery deformation measurement system according to claim 3, wherein the detection means includes:

the detection shell is arranged on the sliding block, a second space is formed by the detection shell in an enclosing mode, and a first opening and a second opening are formed in the surface, close to the second inner surface, of the detection shell;

the laser emitter is accommodated in the second space, an emitting port of the laser emitter is clamped in the first opening, and the laser emitter is used for emitting laser towards the battery to be tested through the emitting port;

the laser receiver is accommodated in the second space, a lighting port of the laser receiver is clamped in the second opening, and the laser receiver is used for receiving laser reflected by the battery to be tested through the lighting port and generating a deformation signal according to the received reflected laser;

and the signal processor is connected with the laser receiver and used for receiving the deformation signal and obtaining the deformation quantity of the battery according to the deformation signal.

8. The battery deformation measurement system according to claim 7, wherein the laser emitted by the laser emitter is an in-line laser, and the extending direction of the in-line laser is perpendicular to the extending direction of the guide rail.

9. The battery deformation measurement system of claim 7, wherein the laser emitter emits laser light that forms a laser plane that forms an acute angle with the second inner surface.

10. The battery strain measurement system of claim 3, further comprising:

the adapter plate is arranged on the surface, close to the second inner surface, of the sliding block, and the detection device is arranged on the surface, far away from the sliding block, of the adapter plate.