CN219532785U - Device for measuring hardness of battery winding core - Google Patents

Abstract

The utility model discloses a device for measuring the hardness of a battery winding core. The measuring device includes a support assembly for positioning a battery core defining a first direction as a thickness direction of the battery core, the battery core having two major surfaces opposite along the first direction and a side surface connected to the major surfaces. The measuring device further comprises a pressing device, the supporting component and the pressing device are oppositely arranged along the first direction, the pressing device is used for being opposite to one main surface of the battery winding core, the pressing device is used for outputting air flow to apply pressure to the battery winding core, and the battery winding core deforms after being subjected to the pressure. The measuring device further comprises a measuring device which is connected with the supporting component and is arranged opposite to the side surface and used for measuring the deformation of the battery winding core under the action of pressure. Through the mode, the technical scheme of the utility model can accurately measure the deformation of the battery winding core under the action of pressure so as to more accurately judge whether the hardness of the battery winding core meets the requirement.

Description

Device for measuring hardness of battery winding core

Technical Field

The utility model relates to the technical field of batteries, in particular to a device for measuring hardness of a battery winding core.

Background

Along with the increasing requirement of environment protection, the new energy industry is vigorously developed, and the battery is the heart of the new energy automobile, and the battery used by the existing new energy automobile comprises a lithium ion battery or a sodium ion battery and the like. In a square aluminum-shell battery, the battery generally comprises at least one winding core, wherein the winding core is obtained by sequentially superposing a positive plate, a diaphragm and a negative plate and then winding, and the winding core obtained by winding is required to be subjected to hot pressing to increase the hardness of the winding core, so that the electrochemical performance and the processing performance of the winding core are improved. At present, the hardness test of the winding core is not unified, and the hardness of the winding core is usually determined by detecting the hardness of the winding core in a mode of manually checking the deformation quantity of the winding core by eyes or by monitoring the change of the thickness of the winding core to reflect the hot-pressing effect of the winding core. This means that the current core hardness test mode is inefficient and is greatly affected by human factors, resulting in lower accuracy of the test results.

Disclosure of Invention

The utility model provides a device for measuring the hardness of a battery winding core, which can improve the measurement accuracy of the hardness of the battery winding core.

The utility model provides a device for measuring hardness of a battery winding core. The measuring device includes a support assembly for positioning a battery core defining a first direction as a thickness direction of the battery core, the battery core having two major surfaces opposite along the first direction and a side surface connected to the major surfaces. The measuring device further comprises a pressing device, the supporting component and the pressing device are oppositely arranged along the first direction, the pressing device is used for being opposite to one main surface of the battery winding core, the pressing device is used for outputting air flow to apply pressure to the battery winding core, and the battery winding core deforms after being subjected to the pressure. The measuring device further comprises a measuring device which is connected with the supporting component and is arranged opposite to the side surface and used for measuring the deformation of the battery winding core under the action of pressure.

In one embodiment of the utility model, the battery winding core can flex under the action of pressure; the measuring apparatus includes: the camera is used for acquiring deflection variation of the battery winding core in the first direction so as to acquire deformation according to the deflection variation.

In an embodiment of the utility model, the camera is used for acquiring deflection variation of the main surface of the battery winding core facing away from the pressing device in the first direction.

In an embodiment of the present utility model, a second direction and a third direction are defined, and the first direction, the second direction and the third direction are perpendicular to each other; the support assembly includes: the base is connected with the measuring equipment; the first guide piece is arranged on the base and extends along the second direction; the second guide piece is arranged on the first guide piece and can move relative to the first guide piece along a second direction, and the second guide piece extends along a third direction; and the support piece is arranged on the second guide piece and can move relative to the second guide piece along the third direction, and the support piece is used for placing the battery winding core.

In one embodiment of the present utility model, the support assembly includes two first guide members spaced apart along the third direction; the support component comprises two second guide pieces which are distributed at intervals along a second direction, and the second guide pieces are respectively connected with the first guide pieces; the battery winding core is provided with four corners, two supporting pieces are arranged on each second guiding piece, and the supporting pieces on each second guiding piece are respectively used for supporting different corners of the battery winding core so as to support the battery winding core in a matched mode.

In one embodiment of the utility model, the support comprises: a support part arranged on the second guide member; the limiting part is arranged on the supporting part; wherein, the limit part is provided with a limit groove; the supporting part is used for supporting the battery winding core, and the limiting groove is used for accommodating the corner part of the battery winding core.

In an embodiment of the utility model, the measuring device further comprises: the adjusting bracket is used for adjusting the distance between the pressing device and the supporting component.

In an embodiment of the utility model, the pressurizing device comprises at least two air outlets for outputting the air flow, wherein the at least two air outlets are arranged in an array.

In one embodiment of the present utility model, the sum of the orthographic projection areas of the air outlets on the plane of the main surface is greater than or equal to 1/3 of the area of the main surface.

In one embodiment of the utility model, the air outlet is circular or oval.

The beneficial effects of the utility model are as follows: different from the prior art, the utility model provides a device for measuring the hardness of a battery winding core. The support component of the measuring device is used for placing the battery winding core. The pressing device of the measuring device is arranged opposite to the supporting component, the pressing device is used for outputting air flow to apply pressure to the battery winding core, and the battery winding core deforms after being subjected to the pressure. The measuring device of the measuring device is used for measuring the deformation of the battery winding core under the action of pressure so as to determine whether the hardness of the battery winding core meets the requirement or not according to the deformation. In other words, the measuring device measures the deformation of the battery winding core under the action of the pressure exerted by the air flow output by the pressure applying device, so that the measuring accuracy of the hardness of the battery winding core can be improved, whether the hardness of the battery winding core meets the requirement or not can be accurately judged, and the mode of detecting the hardness of the winding core by manual visual inspection and monitoring of the thickness of the winding core in the prior art is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a battery core according to an embodiment of the present utility model;

FIG. 2 is a schematic top view of the battery core of FIG. 1;

FIG. 3 is a schematic view of an embodiment of a device for measuring hardness of a battery core according to the present utility model;

FIG. 4 is a schematic top view of the support assembly and battery core of the measuring device shown in FIG. 3;

FIG. 5 is a schematic view of the structure of the support member of the support assembly of FIG. 4;

FIG. 6 is a schematic view of one embodiment of the cell winding deflection of the present utility model;

FIG. 7 is a schematic view of an embodiment of a bottom view of the pressing apparatus of the measuring device of FIG. 3;

FIG. 8 is a schematic view of a battery core and pressing apparatus of the present utility model;

fig. 9 is a schematic view of another embodiment of a bottom view of the pressing apparatus in the measuring device shown in fig. 3.

Reference numerals illustrate:

10 a measuring device; 11 a support assembly; a 111 base; 112 a first guide; 113 a second guide; 114 a support; 1141 a support; 1142 a limit part; 1143 a limit groove; 115 a first fastener; 116 a second fastener; 12 a pressing device; a 121 outlet; 13 measuring equipment; 14 adjusting the bracket; 141 connection parts; 142 mounting portions; 20 battery winding cores; 21 major surfaces; 22 side surfaces.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper", "lower", "left" and "right" are generally used to refer to the directions of the upper, lower, left and right sides of the device in actual use or operation, and are specifically shown in the drawings.

The utility model provides a device for measuring the hardness of a battery winding core, which is described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In order to solve the technical problem of lower measurement accuracy of the hardness of the battery winding core in the prior art, an embodiment of the utility model provides a device for measuring the hardness of the battery winding core. The measuring device includes a support assembly for positioning a battery core defining a first direction as a thickness direction of the battery core, the battery core having two major surfaces opposite along the first direction and a side surface connected to the major surfaces. The measuring device further comprises a pressing device, the supporting component and the pressing device are oppositely arranged along the first direction, the pressing device is used for being opposite to one main surface of the battery winding core, the pressing device is used for outputting air flow to apply pressure to the battery winding core, and the battery winding core deforms after being subjected to the pressure. The measuring device further comprises a measuring device which is connected with the supporting component and is arranged opposite to the side surface and used for measuring the deformation of the battery winding core under the action of pressure. As will be described in detail below.

Referring to fig. 1, 2 and 3, fig. 1 is a schematic structural diagram of an embodiment of a battery core according to the present utility model, fig. 2 is a schematic structural diagram of a top view of the battery core shown in fig. 1, and fig. 3 is a schematic structural diagram of an embodiment of a device for measuring hardness of the battery core according to the present utility model.

In one embodiment, the measuring device 10 is used to measure the hardness of the battery core 20. A first direction (as indicated by arrow Z in fig. 1, the same applies hereinafter) is defined as the thickness direction of the battery core 20. The battery core 20 has two main surfaces 21 opposite in the first direction and side surfaces 22 connected to the main surfaces 21. The battery cell 20 may have a rectangular parallelepiped-like configuration, i.e., the battery cell 20 has four corners.

In one embodiment, the measurement device 10 includes a support assembly 11. The support assembly 11 is used to house a battery core 20. The measuring device 10 further comprises a pressing apparatus 12. The support member 11 is disposed opposite to the pressing device 12 in the first direction. The pressurizing device 12 is used for outputting an air flow to apply pressure to the battery winding core 20, and the battery winding core 20 deforms after receiving the pressure. The measuring device 10 further comprises a measuring apparatus 13. The measuring device 13 is connected to the support assembly 11 and is arranged opposite the side surface 22. The measuring device 13 is used for measuring the deformation of the battery winding core 20 under the action of the pressure, so as to determine whether the hardness of the battery winding core 20 meets the requirement or not according to the deformation.

In this way, in this embodiment, the measuring device 13 measures the deformation of the battery core 20 under the pressure exerted by the air flow output by the pressing device 12, that is, measures the hardness of the battery core 20, so that the manner of manually inspecting and monitoring the thickness of the core to detect the hardness of the core in the prior art is avoided, and the accuracy of measuring the hardness of the battery core can be improved.

It is understood that the amount of deformation of the battery core 20 is inversely related to the stiffness of the battery core 20. When the pressure applied to the battery cell 20 is constant, the larger the deformation amount of the battery cell 20, the smaller the hardness of the battery cell 20, and the smaller the deformation amount of the battery cell 20, the larger the hardness of the battery cell 20.

Referring to fig. 4, fig. 4 is a schematic top view of the support assembly and the battery winding core in the measuring device shown in fig. 3.

In an embodiment, a second direction (as indicated by arrow Y in fig. 4, the same applies below) and a third direction (as indicated by arrow X in fig. 3 and 4, the same applies below) are also defined. The first direction, the second direction and the third direction are perpendicular to each other.

The support assembly 11 comprises a base 111, the base 111 being the base carrier of the support assembly 11, wherein the measuring device 13 is connected to the base 111. The support assembly 11 further includes a first guide 112. The first guide 112 is disposed on the base 111, and the first guide 112 extends along the second direction. The support assembly 11 further includes a second guide 113. The second guide 113 is provided on the first guide 112, and the second guide 113 is movable in the second direction relative to the first guide 112. The second guide 113 extends in the third direction. The support assembly 11 further includes a support member 114, the support member 114 is disposed on the second guide member 113, and the support member 114 is capable of moving relative to the second guide member 113 along the third direction. The support 114 is used to place the battery core 20 to support the battery core 20.

The present embodiment moves along the first guide 112 through the second guide 113 to adjust the position of the support 114 on the second guide 113 in the second direction, and then moves along the second guide 113 through the support 114 to adjust the position of the support 114 in the third direction. In this way, the position of the support member 114 in the second direction and the third direction is adjusted, so that the position of the support member 114 can be matched with the dimension specification of the battery winding core 20, and the support member 114 is ensured to reliably support the battery winding core 20, so that the measurement device 13 can measure the deformation of the battery winding core 20.

For example, the first guide member 112 may be a guide rail, etc., and the second guide member 113 is movably disposed on the first guide member 112. Similarly, the second guide 113 may be a guide rail or the like, and the support 114 is movably disposed on the second guide 113.

The support assembly 11 includes two first guide members 112, and the two first guide members 112 are sequentially spaced apart in the third direction. The support assembly 11 includes two second guide members 113, and the two second guide members 113 are sequentially spaced apart in the second direction. The second guide members 113 are respectively disposed on the first guide members 112, that is, one end of the second guide member 113 is disposed on one first guide member 112 of the two first guide members 112, and the other end of the second guide member 113 is disposed on the other first guide member 112 of the two first guide members 112. The two first guides 112 and the two second guides 113 form a "well" structure. The two first guide members 112 and the two second guide members 113 cooperate to raise the battery core 20, and the hollow areas defined by the two first guide members 112 and the two second guide members 113 cooperate to provide a deformation space for the battery core 20.

Two supporting members 114 are provided on each of the second guide members 113. The supporting members 114 on each second guide member 113 are respectively used for supporting different corners of the battery winding core 20 so as to cooperatively support the battery winding core 20. Specifically, two supporting members 114 on one of the second guides 113 are used to support two corners on the same side of the battery core 20, respectively, and two supporting members 114 on the other second guide 113 are used to support two corners on the other side of the battery core 20, respectively.

In this embodiment, the second guide members 113 are moved along the first guide members 112 to adjust the positions of the support members 114 on the second guide members 113 in the second direction, and then the support members 114 are moved along the corresponding second guide members 113 to adjust the positions of the support members 114 in the third direction, so that the positions of the four support members 114 correspond to the four corners of the battery winding core 20, and each support member 114 can reliably support the corresponding corner of the battery winding core 20, that is, the positions of the support members 114 can match the size specification of the battery winding core 20.

Further, referring to fig. 5, the supporting member 114 includes a supporting portion 1141 and a limiting portion 1142. The supporting portion 1141 is disposed on the second guide 113, and the limiting portion 1142 is disposed on the supporting portion 1141. The limiting portion 1142 is recessed in a direction perpendicular to the first direction to form a limiting groove 1143. The supporting portion 1141 is used for supporting the battery core 20, and the limiting groove 1143 is used for accommodating a corner portion of the battery core 20.

Further, the support assembly 11 also includes a first fastener 115. After adjusting the position of the second guide 113 on the first guide 112, the relative position between the first guide 112 and the second guide 113 is fixed by the first fastener 115. The support assembly 11 also includes a second fastener 116. After adjusting the position of the support 114 on the second guide 113, the relative position between the support 114 and the second guide 113 is fixed by the second fastener 116.

Of course, in other embodiments of the present utility model, the number of first guides 112 and the number of second guides 113 may be one. It is understood that the first guide members 112 on both sides of the battery cell 20 in fig. 4 may be connected in a unitary structure by a cross beam or the like when the number of the first guide members 112 is one, and similarly the second guide members 113 on both sides of the battery cell 20 in fig. 4 may be connected in a unitary structure by a cross beam or the like when the number of the second guide members 113 is one.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating an embodiment of the battery winding core bending deformation condition according to the present utility model.

In one embodiment, the battery core 20 is capable of undergoing flexural deformation under pressure. The measuring device 13 of this embodiment measures the deflection variation of the battery core 20 under the pressure exerted by the air flow output by the pressure applying device 12, so as to obtain the above-mentioned deformation according to the deflection variation, and further obtain the hardness of the battery core 20. The definition of deflection is within the understanding of those skilled in the art, and will not be described in detail herein.

Specifically, when the measuring device 10 is properly placed, the support member 11 is positioned under the pressing apparatus 12, and the pressing apparatus 12 outputs a gas flow downward to apply pressure to the battery cells 20 on the support member 11. The measuring device 13 comprises a camera 131. The camera 131 is connected to the base 111. The camera 131 is configured to obtain a deflection variation of the battery core 20 in the first direction (as shown by Δy in fig. 6, the same applies below), so as to obtain the deformation according to the deflection variation, and determine whether the hardness of the battery core 20 meets the requirement according to the deformation. The present embodiment characterizes the deformation amount of the battery winding core 20 by the amount of deflection change of the battery winding core 20 in the first direction. The amount of deflection change of the battery core 20 is inversely related to the stiffness of the battery core 20. When the pressure applied to the battery core 20 is constant, the larger the deflection change amount of the battery core 20 is, the smaller the hardness of the battery core 20 is, and the smaller the deflection change amount of the battery core 20 is, the larger the hardness of the battery core 20 is. . Specifically, a deformation threshold may be set, and when the value of the deflection change Δy is smaller than or equal to the deformation threshold, the hardness of the battery winding core 20 is considered to meet the requirement. The deformation threshold can be set according to different products.

Further, the camera 131 is used to acquire the amount of deflection change of the battery core 20 in the first direction away from the main surface 21 of the pressing apparatus 12, as shown in fig. 6. The camera 131 acquires the deflection variation of the main surface 21 in the first direction by acquiring images of the main surface 21 before and after being pressed and by comparing the images of the main surface 21 before and after being pressed. In this embodiment, the deflection variation of the battery winding core 20 in the first direction is represented by the deflection variation of the main surface 21 of the battery winding core 20 facing away from the pressing device 12 in the first direction, so as to obtain the deformation of the battery winding core 20 according to the deflection variation of the main surface 21 in the first direction, and further determine whether the hardness of the battery winding core 20 meets the requirement according to the deformation. Alternatively, the picture obtained before compression and the picture obtained after compression may be imported into a computer device, and the coordinates of the main surface 21 of the picture before compression and the coordinates of the main surface 21 of the picture after compression in the first direction are measured respectively by means of a drawing tool such as PS or CAD, and the coordinate values of the two are subjected to a difference operation to obtain the coordinates of the main surface 21 in the first direction; or printing out two pictures before and after being pressed, which are obtained by shooting, and directly measuring through a ruler.

Of course, in other embodiments of the present utility model, the camera 131 may also be configured to obtain the deflection variation of other positions of the battery core 20 in the first direction, for example, the main surface 21 of the battery core 20 facing the pressing apparatus 12, etc., so as to obtain the deflection variation of the battery core 20 in the first direction, which is not limited herein.

Please continue to refer to fig. 1. In one embodiment, the measurement device 10 further includes an adjustment bracket 14. The pressing device 12 is provided on an adjustment bracket 14, and the adjustment bracket 14 is used to adjust the distance between the pressing device 12 and the support assembly 11. When the air pressure of the air flow output by the pressing device 12 is fixed, the distance between the pressing device 12 and the supporting component 11 is adjusted by the adjusting bracket 14, so as to adjust the pressure of the air flow output by the pressing device 12 to the battery winding core 20. The pressure applied to the battery winding core 20 by the air flow output by the pressure applying device 12 is adjusted to make the pressure within a reasonable range, so that the battery winding core 20 can be caused to generate enough deformation to be measured by the measuring device 13, and the pressure is not excessively large to cause irreversible damage to the battery winding core 20.

Of course, in other embodiments of the present utility model, the distance between the pressing device 12 and the supporting member 11 may be kept constant, and the pressure of the air flow outputted from the pressing device 12 is adjusted by adjusting the air pressure of the air flow outputted from the pressing device 12, so as to adjust the pressure of the air flow outputted from the pressing device 12 applied to the battery core 20, which is not limited herein.

Further, the adjusting bracket 14 includes two oppositely disposed connection portions 141 and a mounting portion 142. Opposite ends of each connecting portion 141 are respectively connected to the base 111 and the mounting portion 142, and the mounting portion 142 is provided so as to straddle the connecting portion 141 in a beam form. The pressing device 12 is provided to the mounting portion 142.

Alternatively, the connection part 141 may be designed as a telescopic rod, and the connection part 141 is telescopic to adjust the height of the mounting part 142, thereby adjusting the height of the pressing device 12; alternatively, the mounting portion 142 is slidably connected to the connecting portion 141, that is, the mounting portion 142 can slide up and down along the connecting portion 141 to adjust the height of the mounting portion 142 and thus the height of the pressing device 12, which is not limited herein.

Referring to fig. 7 to 9, fig. 7 is a schematic diagram illustrating an embodiment of a bottom view structure of a pressing device in the measuring apparatus shown in fig. 3, fig. 8 is a schematic diagram illustrating a projection of a battery winding core and the pressing device according to the present utility model, and fig. 9 is a schematic diagram illustrating another embodiment of a bottom view structure of the pressing device in the measuring apparatus shown in fig. 3.

In one embodiment, the pressure applicator 12 includes at least two air outlets 121. The air outlet 121 is used for outputting air flow, and the air flow output by the air outlet 121 acts on the battery winding core 20 to apply the pressure to the battery winding core 20. The at least two air outlets 121 are arranged in an array manner, so that the pressing device 12 can apply relatively uniform pressure to different positions of the battery winding core 20 through the at least two air outlets 121, and further, the deformation of the battery winding core 20 can more accurately reflect the overall hardness of the battery winding core 20, and the measurement accuracy of the hardness of the battery winding core can be further improved. Fig. 7 shows a case where the air outlet area of the single air outlet 121 is small but the number is large, and fig. 9 shows a case where the air outlet area of the single air outlet 121 is large but the number is small.

In particular, considering that the device applied to the hardness test of the winding core in the market at present can only test the single-point position or the local position on the winding core, the limitation exists, and the integral hardness condition of the winding core can not be accurately reflected. However, the hardness of different positions (such as edge position, middle position, etc.) on the battery winding core 20 generally varies, especially for large-capacity and large-size battery winding cores 20 used in the power and energy storage fields, and the transportation of the battery winding core 20 before the battery winding core is put into the shell needs a manipulator to grasp a large surface of the battery winding core 20, so how to accurately evaluate the overall hardness of the battery winding core 20 is a technical problem to be solved.

In view of this, as shown in fig. 8, each air outlet 121 of the present embodiment has an orthographic projection S on a plane where the main surface 21 of the battery core 20 is located. The sum of the orthographic projection areas of the respective air outlets 121 on the plane of the main surface 21 is greater than or equal to 1/3 of the area of the main surface 21. The shape of the air outlet 121 is circular or elliptical, and can well homogenize the blown air.

Through the above manner, the air flow output by each air outlet 121 on the pressure applying device 12 can completely cover the main surface 21 of the battery winding core 20, so that the acting surface of the air flow output by the pressure applying device 12 on the battery winding core 20 has a larger area, and thus, the deformation quantity of the battery winding core 20 can reflect the integral hardness of the battery winding core 20 as accurately as possible, and the measurement accuracy of the hardness of the battery winding core can be further improved.

It should be noted that, considering the situation that the air flows output by the air outlets 121 of the pressing device 12 diverge, the present embodiment allows the sum of the orthographic projection areas of each air outlet 121 on the plane where the main surface 21 is located to be smaller than the area of the main surface 21, the air flow output by each air outlet 121 can still completely cover the main surface 21 of the battery core 20, so as to apply relatively uniform pressure to each position of the main surface 21, and further, the deformation amount of the battery core 20 can reflect the hardness of the battery core 20 more accurately, and further, the measurement accuracy of the hardness of the battery core can be improved.

The above describes the device for measuring the hardness of the battery winding core provided by the utility model in detail, and specific examples are applied to illustrate the principle and the implementation mode of the utility model, and the above examples are only used for helping to understand the method and the core idea of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.

Claims (10)

1. A device for measuring hardness of a battery winding core, the device comprising:

a support assembly for positioning a battery core defining a first direction as a thickness direction of the battery core, the battery core having two major surfaces opposite along the first direction and a side surface connected to the major surfaces;

the support component is arranged opposite to the pressing device along the first direction, the pressing device is used for being opposite to one main surface of the battery winding core, the pressing device is used for outputting air flow to apply pressure to the battery winding core, and the battery winding core deforms after being subjected to the pressure; and

and the measuring equipment is connected with the supporting component and is arranged opposite to the side surface and is used for measuring the deformation of the battery winding core under the action of pressure.

2. The measuring device according to claim 1, wherein,

the battery winding core can flex and deform under the action of the pressure;

the measuring device includes:

the camera is used for acquiring deflection variation of the battery winding core in the first direction so as to acquire the deformation according to the deflection variation.

3. The measuring device according to claim 2, wherein,

the camera is used for acquiring deflection variation of the main surface of the battery winding core, which deviates from the pressing equipment, in the first direction.

4. The measuring device according to claim 1, wherein,

defining a second direction and a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other;

the support assembly includes:

the measuring equipment is connected with the base;

the first guide piece is arranged on the base and extends along the second direction;

the second guide piece is arranged on the first guide piece and can move relative to the first guide piece along the second direction, and the second guide piece extends along the third direction; and

the support piece is arranged on the second guide piece and can move along the third direction relative to the second guide piece, and the support piece is used for placing the battery winding core.

5. The measuring apparatus according to claim 4, wherein,

the support assembly comprises two first guide pieces which are distributed at intervals along the third direction;

the support assembly comprises two second guide pieces which are distributed at intervals along the second direction, and the second guide pieces are respectively connected with the first guide pieces;

the battery winding core is provided with four corners, two supporting pieces are arranged on each second guiding piece, and the supporting pieces on each second guiding piece are respectively used for supporting different corners of the battery winding core so as to support the battery winding core in a matched mode.

6. The measuring apparatus according to claim 4, wherein,

the support includes:

a support part provided to the second guide; and

the limiting part is arranged on the supporting part;

wherein, the limit part is provided with a limit groove; the supporting part is used for supporting the battery winding core, and the limiting groove is used for accommodating the corner of the battery winding core.

7. The measuring device according to claim 1, wherein,

the measuring device further includes:

the adjusting bracket is used for adjusting the distance between the pressing device and the supporting component.

8. The measuring device according to claim 1, wherein,

the pressurizing equipment comprises at least two air outlets, wherein the air outlets are used for outputting the air flow, and the at least two air outlets are arranged in an array mode.

9. The measuring device of claim 8, wherein the measuring device comprises a sensor,

the sum of the orthographic projection areas of the air outlets on the plane of the main surface is greater than or equal to 1/3 of the area of the main surface.

10. The measurement device of claim 8, wherein the air outlet is circular or oval.