Battery flatness detection device and system

Abstract

The utility model provides a battery flatness detection device and system. The battery flatness detection device comprises a supporting module and a distance measuring module, the supporting module is used for supporting a target battery to be detected, the distance measuring module comprises a fixed part and a rotating part, the rotating part is rotationally connected to the fixed part and arranged between the fixed part and the supporting module, and a laser distance measuring device is arranged on the side, facing the supporting module, of the rotating part. The laser distance measuring device is used for carrying out laser distance measurement on the target battery so as to determine the flatness of the target battery. According to the utility model, the laser range finding device is arranged on the rotating part of the range finding module, so that the laser range finding device can carry out laser range finding on different positions of the target battery in the rotating process, and then the flatness of the target battery is determined; the detection cost of the flatness of the battery is lower, and the detection device of the flatness of the battery is simpler in structure and easy to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field, concretely relates to a kind of detection device and system of battery flatness. BACKGROUND

[0002] In the battery pack production process, battery needs to be laser welded with connecting sheet and is grouped processing, laser welding process is high frequency used, and welding quality can affect the reliability of entire battery system.In many factors influencing welding quality, the flatness of battery surface welding area is one of the significant factors.To ensure the high yield of laser welding process step, the flatness of battery surface welding area is detected before welding.

[0003] In related art, three-coordinate detection machine can be used to detect battery flatness, and its principle is to measure three-dimensional parameters of battery on X-axis, Y-axis and Z-axis by three-coordinate detection machine, and then to determine battery flatness after three-dimensional parameters are transmitted to computer for processing and analysis.But the equipment in this detection method is expensive and has high maintenance cost, so that the detection cost of battery flatness is also too high. SUMMARY

[0004] Embodiments of the utility model provide a kind of detection device and system of battery flatness, which can reduce the detection cost of battery flatness.

[0005] In the first aspect, embodiments of the utility model provide a kind of detection device of battery flatness, and the detection device of battery flatness includes:

[0006] Support module for supporting target battery to be detected;

[0007] Distance measuring module includes fixed part and rotating part, and the rotating part is rotatably connected to the fixed part, and the rotating part is arranged between the fixed part and the support module, and the side of the rotating part towards the support module is provided with laser ranging device, and the laser ranging device is used for laser ranging to the target battery to determine the flatness of the target battery.

[0008] In an embodiment, the side of the rotating part towards the support module is slidably connected with sliding piece, and the laser ranging device is fixed on the sliding piece.

[0009] In an embodiment, toothed track is provided on the sliding piece, and the side of the rotating part towards the support module is further provided with transmission gear engaged with the toothed track, and the transmission gear is used to drive the sliding piece to slide relative to the rotating part.

[0010] In an embodiment, the laser ranging device is provided with a plurality of, the sliding piece is provided with a plurality of, and different laser ranging devices are fixed on different sliding pieces.

[0011] In an embodiment, the support module comprises a support base, a first support member and a second support member, the first and second support members are both configured to support the target battery, and the first support member is slidingly connected to the support base, and the second support member is fixed to the support base.

[0012] In an embodiment, the first support member is provided with an opening, and a limiting post is fixed to the support base, the limiting post is at least partially in the opening to limit the sliding of the first support member relative to the support base.

[0013] In an embodiment, the support base comprises a support base upper plate and a support base lower plate, the support base upper plate is rotatably connected to the support base lower plate, and the first support member is slidingly connected to the support base upper plate, and the second support member is fixed to the support base upper plate.

[0014] In an embodiment, the first support member and / or the second support member is a V-shaped support member, and the V-shaped opening of the V-shaped support member faces away from the support base.

[0015] In an embodiment, the battery flatness detection device further comprises a base plate, and the support module and the distance measuring module are both arranged on the base plate.

[0016] In a second aspect, the embodiments of the utility model provide a battery flatness detection system, the battery flatness detection system comprises the battery flatness detection device of any one of the above.

[0017] The embodiments of the utility model have the advantages of:

[0018] In the embodiments of the utility model, the laser distance measuring device is arranged on the rotating part of the distance measuring module, so that the laser distance measuring device can perform laser distance measurement on different positions of the target battery in the rotating process, and then the flatness of the target battery is determined, compared with using a three-coordinate detection machine to detect the battery flatness, the detection cost of the battery flatness is lower, and the structure of the battery flatness detection device is simpler and easier to operate. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0020] Figure 1is an embodiment structural schematic view of the battery flatness detection device provided by the utility model;

[0021] Figure 2 is another embodiment structural schematic view of the battery flatness detection device provided by the utility model;

[0022] Figure 3 is an embodiment structural schematic view of the distance measuring module provided by the utility model;

[0023] Figure 4 is another embodiment structural schematic view of the distance measuring module provided by the utility model;

[0024] Figure 5 is Figure 4 is a detailed structural schematic view of the area A;

[0025] Figure 6 is an embodiment structural schematic view of the target battery provided by the utility model

[0026] Figure 7 is an embodiment structural schematic view of the target battery provided by the utility model

[0027] Figure 8 is an embodiment structural schematic view of the distance measuring module provided by the utility model;

[0028] Figure 9 is an embodiment structural schematic view of the data processing equipment provided by the utility model;

[0029] Figure 10 is an embodiment flow schematic view of the battery flatness detection method provided by the utility model.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 10, support module;11, support seat;111, support seat upper plate;112, support seat lower plate;12, first support piece;121, opening;122, limiting column;13, second support piece;14, sliding rail;20, target battery;21, battery positive pole area;211, first laser ranging track;212, first laser ranging point;22, battery negative pole area;221, second laser ranging track;222, second laser ranging point;30, distance measuring module;31, fixed part;32, rotating part;33, laser ranging device;34, sliding piece;35, support frame;36, toothed track;37, transmission gear;38, wire;40, bottom plate. DETAILED DESCRIPTION

[0032] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, and is not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model.

[0033] In addition, in the utility model, the orientation words such as "up" and "down" are generally used to indicate the up and down of the device in the actual use or working state, and the specific is the drawing direction in the drawing, and "inner" and "outer" are for the outline of the device, and the meaning of "multiple" is two or more than two, unless there is a specific limitation.

[0034] In the related art, in order to ensure the high yield of the laser welding process step between the battery and the connecting piece, the battery welding area flatness is detected before welding, and the qualified products are screened out for laser welding treatment. There are two detection methods for battery flatness, one is to use height gauge detection, that is, to use height gauge to take a certain number of detection points on the welding track of the positive and negative poles of the battery, to calculate the detection value range and to obtain the flatness. However, this detection method has many defects, such as poor detection accuracy, low detection efficiency, test data cannot be automatically recorded, and instrument contact with battery surface is easy to produce scratch. The second detection method is to use three coordinate detection machine to detect, the principle is to measure the three-dimensional parameters of the battery on X axis, Y axis and Z axis by three coordinate detection machine, and then to transmit the three-dimensional parameters to computer for processing and analysis to determine the battery flatness. The defects of this detection method are high equipment price, high maintenance cost and difficult operation, and the cost performance of detecting battery flatness is too low, which is difficult to use on a large scale.

[0035] In order to overcome the above defects, the application provides a battery flatness detection device and system, by setting the laser ranging device on the rotating part of the ranging module, the laser ranging device can perform laser ranging on different positions of the target battery in the rotating process, and then determine the flatness of the target battery. Compared with using three coordinate detection machine to detect the battery flatness, the detection cost of the battery flatness is lower, and the structure of the battery flatness detection device is simpler and easier to operate. For specific scheme, please refer to the following specific description.

[0036] Please refer to Figure 1 and Figure 2 The battery flatness detection device provided by the application comprises a supporting module 10 and a ranging module 30. The supporting module 10 is used for supporting the target battery 20 to be detected, and the ranging module 30 is used for laser ranging on the target battery 20 to determine the flatness of the target battery 20.

[0037] The distance measuring module 30 comprises a fixed part 31 and a rotating part 32, the rotating part 32 is rotatably connected to the fixed part 31 (for example, the rotating part 32 can be rotatably connected to the fixed part 31 through a bearing structure). The rotating part 32 is arranged between the fixed part 31 and the support module 10, and a laser distance measuring device 33 is arranged on the side of the rotating part 32 facing the support module 10. The laser distance measuring device 33 is arranged to face the target battery 20, so as to perform laser distance measurement on the target battery 20, and the distance obtained by laser distance measurement can be used to determine the flatness of the target battery 20. The laser distance measuring device 33 may, for example, be a laser distance sensor, and the laser distance measurement accuracy of the laser distance measuring device 33 may, for example, be ±0.01 mm.

[0038] The rotating part 32 can rotate 360° relative to the fixed part 31, so that the laser distance measuring device 33 also rotates with the rotating part 32, thereby enabling laser distance measurement to be performed on multiple different positions on the target battery 20, and the distances between the laser distance measuring device 33 and the multiple different positions on the target battery 20 are obtained. According to the distances between the laser distance measuring device 33 and the multiple different positions on the target battery 20, the flatness of the target battery 20 can be determined, for example, the difference between the maximum value and the minimum value of the distances between the laser distance measuring device 33 and the multiple different positions on the target battery 20 can be taken as the flatness of the target battery 20.

[0039] In some embodiments of the present application, the rotating manner of the rotating part 32 is exemplified. Specifically, the rotation axis of the rotating part 32 relative to the fixed part 31 can be perpendicular to the surface of the rotating part 32 facing the support module 10 and passes through the center point of the surface of the rotating part 32 facing the support module 10. In this way, when the target battery 20 has been aligned with the rotating part 32 (for example, the surface of the target battery 20 facing the rotating part 32 is parallel to the surface of the rotating part 32 facing the support module 10), if the rotating part 32 rotates around the rotation axis, the difference between the distances between the laser distance measuring device 33 and the multiple different positions on the target battery 20 will be affected by the flatness of the surface of the target battery 20 facing the rotating part 32, thereby enabling the flatness of the surface of the target battery 20 facing the rotating part 32 to be calculated more simply and conveniently.

[0040] In some embodiments of the present application, please refer to Figure 3 and Figure 4, the rotating part 32 is slidably connected with a sliding part 34 on the side facing the supporting module 10, that is, the sliding part 34 can slide relative to the rotating part 32 towards the surface of the supporting module 10. The laser ranging device 33 is fixed on the sliding part 34, so that the laser ranging device 33 can also slide relative to the rotating part 32 towards the surface of the supporting module 10, thereby changing the position of the laser ranging device 33, so that the laser ranging position on the target battery 20 also changes. Therefore, the battery flatness detection personnel can control the sliding of the sliding part 34 based on the actual needs to change the position on the target battery 20 where laser ranging is desired, so that the battery flatness detection is more simple and convenient.

[0041] In some embodiments of the present application, the sliding connection mode of the sliding part 34 is exemplified. Specifically, the side of the rotating part 32 facing the supporting module 10 can be provided with a sliding groove (not shown in the figure), and the side of the sliding part 34 facing the rotating part 32 is provided with a protrusion (not shown in the figure), which is arranged in the sliding groove to limit the sliding direction of the sliding part 34 along the sliding groove.

[0042] In some embodiments of the present application, the driving force of the sliding part 34 when sliding is exemplified. Specifically, referring to Figure 5 , the sliding part 34 is provided with a toothed track 36 (for example, the adjacent side of the side of the sliding part 34 facing the supporting module 10 is provided with a toothed track 36). The side of the rotating part 32 facing the supporting module 10 is also provided with a transmission gear 37 engaged with the toothed track 36, and the transmission gear 37 is used to drive the sliding part 34 to slide relative to the rotating part 32. For example, by controlling the rotation of the transmission gear 37, the engagement of the transmission gear 37 with the toothed track 36 can make the sliding part 34 move, thereby sliding relative to the surface of the rotating part 32 towards the surface of the supporting module 10. In this way, by setting the rotation control parameters of the transmission gear 37, the sliding of the sliding part 34 can be controlled, and the laser ranging trajectory of the laser ranging device 33 can be adjusted.

[0043] In some embodiments of the present application, referring to Figure 5 , the end of the laser ranging device 33 away from the supporting module 10 is also embedded into the accommodating cavity (not shown in the figure) of the sliding part 34, and is electrically connected with a wire 38 in the accommodating cavity. The wire 38 is used for power supply, data transmission (such as transmitting the distance obtained by laser ranging) and the like of the laser ranging device 33.

[0044] In some embodiments of the present application, the laser ranging device 33 is provided with a plurality of laser ranging devices 33, and the sliding part 34 is also provided with a plurality of sliding parts 34, for example Figure 5 two laser ranging devices 33 and two sliding parts 34 are provided in Figure 6 the plurality of laser ranging devices 33 are used to simultaneously perform laser ranging on different positions of the target battery 20, for exampleAs shown, when the target battery 20 is a 46110 type ternary power battery (the range of the battery positive electrode area 21 is diameter 0mm-diameter 20mm, the range of the weldable area in the battery positive electrode area 21 is diameter 6mm-diameter 14mm, the range of the battery negative electrode area 22 is diameter 21mm-diameter 46mm, and the range of the weldable area in the battery negative electrode area 22 is diameter 24mm-diameter 40mm), the battery positive electrode area 21 and the battery negative electrode area 22 can be simultaneously arranged on the side of the target battery 20 facing the rotating part 32, and the battery negative electrode area 22 is arranged around the battery positive electrode area 21. At this time, the laser ranging of the battery negative electrode area 22 can be performed by using at least one laser ranging device 33, and the laser ranging of the battery positive electrode area 21 can be simultaneously performed by using another at least one laser ranging device 33, so as to improve the detection efficiency of the battery flatness. Moreover, referring to Figure 5 , the side of the rotating part 32 facing the support module 10 is slidingly connected with a plurality of sliding members 34, and different laser ranging devices 33 are fixed on different sliding members 34. In this way, by setting the rotation control parameters of the transmission gears 37 of each sliding member 34, the positions of the laser ranging devices 33 can be controlled respectively, so that the adjustment of the plurality of different laser ranging positions on the target battery 20 is more simple and convenient. For example, a part of the laser ranging positions on the target battery 20 can be adjusted to the battery positive electrode area 21, and another part of the laser ranging positions on the target battery 20 can be adjusted to the battery negative electrode area 22.

[0045] In some embodiments of the present application, referring to Figure 7 , the first laser ranging track 211 in the battery positive electrode area 21 is a circular track (for example, a circular track with a diameter of 10mm), which can include a plurality of first laser ranging points 212 (for example, 4-36 first laser ranging points 212). The plurality of first laser ranging points 212 are arranged at intervals in the circular track, for example, 8 first laser ranging points 212 are distributed at equal intervals in the circular track, and the adjacent first laser ranging points 212 are spaced apart by 45°. Similarly, the second laser ranging track 221 in the battery negative electrode area 22 is also a circular track (for example, a circular track with a diameter of 35mm), which can include a plurality of second laser ranging points 222 (for example, 4-36 second laser ranging points 222). The plurality of second laser ranging points 222 are arranged at intervals in the circular track, for example, 8 second laser ranging points 222 are distributed at equal intervals in the circular track, and the adjacent second laser ranging points 222 are spaced apart by 45°. It can be seen that the first laser ranging track 211 in the battery positive electrode area 21 and the second laser ranging track 221 in the battery negative electrode area 22 can be obtained by rotating the rotating part 32.

[0046] In some embodiments of the present application, referring to Figure 8The detailed structure of the support module 10 is exemplified. Specifically, the support module 10 comprises a support base 11, a first support 12 and a second support 13, both of which are used to support the target battery 20, for example, the first support 12 can be used as one support point of the target battery 20, and the second support 13 can be used as another support point of the target battery 20, so as to support the target battery 20. In addition, the first support 12 is slidingly connected to the support base 11 (for example, the first support 12 can slide towards the second support 13 or slide away from the second support 13), and the second support 13 is fixed to the support base 11, so that when the first support 12 slides, the first support 12 can be displaced relative to the second support 13, thereby changing the position of the support point of the first support 12, so that the support module 10 can adapt to target batteries 20 of different lengths. For example, the first support 12 can be controlled to slide away from the second support 13, so that the distance between the support point of the first support 12 and the support point of the second support 13 can adapt to a target battery 20 with a longer length. For another example, the first support 12 can be controlled to slide towards the second support 13, so that the distance between the support point of the first support 12 and the support point of the second support 13 can adapt to a target battery 20 with a shorter length.

[0047] In some embodiments of the present application, the surface of the first support 12 and / or the second support 13 is an insulating surface formed by insulating treatment to avoid contact with the battery and conduct electricity.

[0048] In some embodiments of the present application, the sliding connection mode of the first support 12 is exemplified. Specifically, referring to Figure 8 , the support base 11 is fixed with a sliding rail 14, and the side of the first support 12 facing the support base 11 is provided with a groove (not shown in the figure), and the sliding rail 14 is arranged in the groove to limit the sliding of the first support 12 along the direction of the sliding rail 14.

[0049] In some embodiments of the present application, referring to Figure 8 , the first support 12 and the second support 13 can be both slidingly connected to the support base 11, so that by controlling at least one of the first support 12 and the second support 13 to slide, the distance between the first support 12 and the second support 13 can be changed to adapt to target batteries 20 of different lengths.

[0050] In some embodiments of the present application, referring to Figure 8The first support 12 is provided with an opening 121, which can be a through hole, for example a round rectangular through hole. A limiting post 122 is fixed on the support base 11 and at least partially in the opening 121 to limit the sliding of the first support 12 relative to the support base 11, so as to avoid the first support 12 from sliding too much relative to the support base 11 and beyond the range of the support base 11. The limiting post 122 can be a bolt, at least a part of which is fixed in a threaded hole in the support base 11 by threads.

[0051] In some embodiments of the present application, referring to Figure 8 The support base 11 includes a support base upper plate 111 and a support base lower plate 112, and the support base upper plate 111 is rotationally connected to the support base lower plate 112 (for example, through a bearing structure). Thus, the support base upper plate 111 can rotate 360° relative to the support base lower plate 112 (the rotation axis can be perpendicular to the upper surface of the support base upper plate 111 and pass through the center point of the upper surface of the support base upper plate 111). The first support 12 is slidingly connected to the support base upper plate 111, and the second support 13 is fixed to the support base upper plate 111. Thus, when the support base upper plate 111 rotates, the first support 12 and the second support 13 also rotate with the support base upper plate 111, so that the target battery 20 supported by the first support 12 and the second support 13 can also rotate. Thus, by controlling the rotation of the support base upper plate 111, the target battery 20 can be adjusted to be aligned with the rotating part 32 (for example, the surface of the target battery 20 facing the rotating part 32 is parallel to the surface of the rotating part 32 facing the support module 10), so that the detection of the flatness of the battery is more simple and convenient.

[0052] In some embodiments of the present application, referring to Figure 8 The first support 12 and / or the second support 13 are V-shaped supports, and the V-shaped opening of the V-shaped support faces away from the support base 11. Thus, by placing the target battery 20 in the V-shaped opening, the target battery 20 can be supported. Moreover, since the V-shaped opening gradually increases away from the support base 11, it can be adapted to target batteries 20 of various sizes (for example, battery diameters).

[0053] In some embodiments of the present application, the first support 12 and / or the second support 13 can also be U-shaped supports, and the U-shaped opening of the U-shaped support faces away from the support base 11, which can also support the target battery 20.

[0054] In some embodiments of the present application, referring to Figure 1 and Figure 2The battery flatness detection device further comprises a bottom plate 40, and the supporting module 10 and the distance measuring module 30 are fixed on the bottom plate 40, so that the supporting module 10 and the distance measuring module 30 are connected to form an integral whole through the bottom plate 40, and the detection of the battery flatness is more simple and convenient.

[0055] In some embodiments of the present application, referring to Figure 3 and Figure 4 The distance measuring module 30 further comprises a support frame 35, and the fixing part 31 is fixed on the support frame 35, and the support frame 35 is fixed on the bottom plate 40.

[0056] In some embodiments of the present application, the fixing of any structure in any of the above embodiments can be achieved by screwing, thread cooperation between screw holes. Of course, other ways can also be used to achieve the fixing of the structure, which are not limited herein.

[0057] In some embodiments of the present application, the battery flatness detection system provided by the embodiments of the present application comprises the battery flatness detection device in any of the embodiments. The battery flatness detection system has all the beneficial effects of the above-mentioned battery flatness detection device, which will not be described herein again.

[0058] In some embodiments of the present application, the battery flatness detection system can further comprise a data processing device, and the data processing device is configured to determine the flatness of the target battery according to the distance obtained by the laser distance measuring device. Referring to Figure 9 The data processing device can specifically comprise a processor, a memory, a communication interface, an input / output interface, etc., and the processor, the memory, the communication interface, the input / output interface, etc. are connected through a bus to realize the function of determining the flatness of the target battery. For example, the data processing device can be a computer (Personal Computer, PC) or other intelligent device.

[0059] In some embodiments of the present application, referring to Figure 10 Based on the battery flatness detection device or the battery flatness detection system, a battery flatness detection method is further provided, which specifically comprises the following steps:

[0060] S1: placing the target battery in a preset temperature (for example, 20±2℃) and a preset humidity (for example, 50±10% relative humidity) environment for a preset time (for example, 4 hours).

[0061] S2: adjusting and correcting the battery flatness detection device according to the size of the target battery.

[0062] S3: setting detection parameters according to the first laser distance measuring track in the positive electrode area of the battery, the second laser distance measuring track in the negative electrode area of the battery, the number of first laser distance measuring points, the number of second laser distance measuring points and the test speed.

[0063] S4: Turn on the detection device of the battery flatness, and place the target battery on the support module by using a mechanical arm or manual method.

[0064] S5: The ranging module detects the flatness of the target battery to obtain the positive electrode flatness and the negative electrode flatness of the target battery.

[0065] In some embodiments of the present application, after step S5, step S6 can also be included. Step S6 can include: comparing the positive electrode flatness with a preset positive electrode flatness qualified threshold (for example, 0.1 mm), and comparing the negative electrode flatness with a preset negative electrode flatness qualified threshold (for example, 0.2 mm), so as to determine whether the target battery is a qualified product or an unqualified product, thereby realizing automatic classification of the target battery after the flatness detection.

[0066] As can be seen from the above embodiments, compared with the height gauge detection method, the battery flatness detection device and system of the present application have the characteristics of high detection precision, high automation degree, high detection efficiency and recordable detection data, and the battery flatness detection device does not contact the area of the target battery surface to be detected, and does not scratch the target battery to affect the subsequent welding process. Compared with the three-coordinate detection machine detection method, the battery flatness detection device and system of the present application have the characteristics of simple structure, easy operation and low cost, and are suitable for large-scale use in the production line. In addition, the battery flatness detection device of the present application is universal and suitable for batteries of different sizes.

[0067] The embodiments of the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above embodiment description is only used to help understand the structure of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A battery flatness detection device, characterized by, The battery flatness detection device comprises: a support module for supporting a target battery to be detected; a distance measuring module comprising a fixed part and a rotating part, the rotating part being rotatably connected to the fixed part, the rotating part being arranged between the fixed part and the support module, and a laser distance measuring device being arranged on a side of the rotating part facing the support module, the laser distance measuring device being used for laser distance measurement on the target battery to determine the flatness of the target battery.

2. The battery flatness detecting apparatus according to claim 1, wherein The rotating part is slidingly connected with a sliding piece on the side thereof facing the support module, and the laser distance measuring device is fixed on the sliding piece.

3. The apparatus for detecting flatness of a battery as claimed in claim 2, wherein A toothed track is arranged on the sliding piece, and a transmission gear meshing with the toothed track is further arranged on the side of the rotating part facing the support module, the transmission gear being used for driving the sliding piece to slide relative to the rotating part.

4. The apparatus for detecting flatness of a battery as claimed in claim 2, wherein A plurality of laser distance measuring devices are arranged, and a plurality of sliding pieces are arranged, and different laser distance measuring devices are fixed on different sliding pieces.

5. The apparatus for detecting flatness of a battery as claimed in claim 1, wherein The support module comprises a support seat, a first support piece and a second support piece, the first support piece and the second support piece are both used for supporting the target battery, and the first support piece is slidingly connected to the support seat, and the second support piece is fixed to the support seat.

6. The apparatus for detecting flatness of a battery as claimed in claim 5, wherein The first support piece is provided with an opening, and a limiting column is fixed on the support seat, the limiting column being at least partially in the opening to limit the sliding of the first support piece relative to the support seat.

7. The apparatus for detecting flatness of a battery as claimed in claim 5, wherein The support seat comprises an upper support seat plate and a lower support seat plate, the upper support seat plate being rotatably connected to the lower support seat plate, and the first support piece being slidingly connected to the upper support seat plate, and the second support piece being fixed to the upper support seat plate.

8. The apparatus for detecting flatness of a battery as claimed in claim 5, wherein The first support piece and / or the second support piece is a V-shaped support piece, and the V-shaped opening of the V-shaped support piece faces away from the support seat.

9. The apparatus for detecting flatness of a battery as claimed in any one of claims 1 to 8, wherein The battery flatness detection device further comprises a bottom plate, and the support module and the distance measuring module are arranged on the bottom plate.

10. A battery flatness detection system, comprising: The battery flatness detection system comprises the battery flatness detection device according to any one of claims 1 to 9.

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