Battery cell thickness measuring device

Abstract

The invention discloses a battery cell thickness measuring device, and relates to the field of assembled battery manufacturing. The battery cell thickness measuring device comprises a base frame, an extrusion mechanism, a pressure detection piece, a thickness detection assembly and a control part. A stop plate is arranged on the base frame, and an extrusion position for placing a battery cell piece is formed between the movable frame and the stop plate; in the thickness measuring stage, the moving frame is driven by the driving piece to move so as to act on the battery cell piece in an extruding mode, the pressure detection piece obtains extruding force data of the extruding mechanism acting on the battery cell piece, the control part receives the extruding force data, and after the extruding force data reaches the specified extruding force, the extruding mechanism is operated to stop the extruding effect on the battery cell piece. And displacement data of the detection end is obtained by the displacement detection piece, and the actual thickness of the battery core piece under the action of the extrusion force is reflected. According to the automatic thickness measurement configuration established by the invention, the actual thickness of the battery core piece in a specified extrusion force state can be quickly obtained, so that the stack length of the assembled battery is favorably determined, and a reference is provided for subsequent manufacturing.

Description

Technical Field

[0001] The invention relates to the field of assembled battery manufacturing, and in particular to a battery cell thickness measuring device. Background Art

[0002] With the rapid development of the new energy industry, the market demand for processed and assembled battery packs is increasing. In the production and manufacturing of battery packs, the extrusion force and stacking length of the module have always been important control indicators in the manufacturing stage of battery packs, so the thickness detection of the incoming battery cells is particularly important.

[0003] Currently, the traditional vernier caliper can be used to measure the thickness, but it can only measure the normal thickness of the battery cell in its natural state. Since the battery cell will be affected by the adjacent stacked battery cells and the battery outer packaging during the manufacturing process of the assembled battery, it is impossible to obtain the actual thickness of the battery cell, resulting in difficulty in effectively determining the stacking length of the assembled battery. Summary of the invention

[0004] In order to solve the technical problems raised by the above background technology, the present invention provides a battery thickness measuring device, comprising:

[0005] A base frame having a stop plate;

[0006] An extrusion mechanism is arranged on the base frame, the extrusion mechanism comprises a driving member and a moving frame, the moving frame is arranged at the driving end of the driving member, the driving member is suitable for driving the moving frame to move toward the stop plate, and an extrusion position suitable for placing the battery core is arranged between the moving frame and the stop plate;

[0007] A pressure detection member, arranged on the extrusion mechanism, and used to detect the extrusion force data of the extrusion mechanism on the battery core;

[0008] A thickness detection assembly, comprising at least one displacement detection member, wherein the displacement detection member is mounted on the extrusion mechanism, and a detection end of the displacement detection member is arranged on an end surface of the movable frame facing the stop plate;

[0009] And a control component, the control component and the pressure detection component are electrically connected, and the control component and the displacement detection component are electrically connected.

[0010] As a preferred technical solution, the extrusion mechanism also includes a transmission member, a first bracket and a second bracket, the transmission member and the driving member are fixedly connected, the first bracket is fixedly arranged on the base frame, the second bracket and the movable frame are movably arranged, the second bracket is arranged on the transmission side of the transmission member, the second bracket and the base frame are slidably configured, and the second bracket is arranged between the movable frame and the first bracket; the driving member is suitable for driving the transmission member to cause the second bracket to move closer to the movable frame so that the movable frame moves toward the stop plate, and the detection end of the pressure detection member is arranged on the end surface of the movable frame facing the second bracket or on the end surface of the second bracket facing the movable frame.

[0011] As a preferred technical solution, the extrusion mechanism further includes at least two guide shafts, any two guide shafts are arranged at intervals, the guide shafts and the first bracket are slidably configured, the guide shafts and the second bracket are slidably configured, and the guiding direction of the guide shafts is arranged parallel to the moving direction of the moving bracket;

[0012] The movable frame comprises a pressure plate and a connecting plate. The pressure plate and the stop plate are arranged at intervals. The connecting plate is fixedly connected to the ends of all the guide shafts away from the first bracket.

[0013] As a preferred technical solution, the extrusion mechanism further includes a linear bearing, the linear bearing is configured corresponding to the guide shaft, and the guide shaft slides through the linear bearing; and / or

[0014] The extrusion mechanism further comprises a track member and a moving seat, wherein the track member is fixedly connected to the base frame, the moving seat is slidably arranged on the upper end of the track member, and the second bracket is fixedly connected to the moving seat.

[0015] As a preferred technical solution, the extrusion mechanism also includes a sliding member and a guide sleeve, the sliding member and the second bracket are fixedly connected, the transmission member and the sliding member are transmission configured, the guide sleeve and the first bracket are fixedly connected, and the guide sleeve and the transmission member are rotationally configured.

[0016] As a preferred technical solution, the driving member is configured as a driving hand wheel or a driving control motor, the transmission member is configured as a T-type screw rod member, and the sliding member is configured as a sliding bearing seat.

[0017] As a preferred technical solution, the thickness detection component includes a first displacement detection member, a second displacement detection member and a third displacement detection member which are arranged at intervals; the first displacement detection member, the second displacement detection member and the third displacement detection member have different detection heights, the detection end of the first displacement detection member is suitable for being set in the upper area of ​​the end surface of the moving frame, the detection end of the second displacement detection member is suitable for being set in the middle area of ​​the end surface of the moving frame, and the detection end of the third displacement detection member is suitable for being set in the lower area of ​​the end surface of the moving frame.

[0018] As a preferred technical solution, all the displacement detection members are configured as mechanical displacement sensors; and / or

[0019] Any displacement detection member is equipped with a probe and at least one elastic pin, the probe and the elastic pin are respectively protruding from the end surface of the movable frame toward the stop plate, and the elastic pin is arranged in the vicinity of the probe.

[0020] As a preferred technical solution, the control component includes a human-machine interface screen and a pressure controller, the human-machine interface screen is used to display the extrusion pressure data and the thickness data of the battery core, the pressure controller is electrically connected to the pressure detection component, and the pressure controller is electrically connected to the human-machine interface screen.

[0021] As a preferred technical solution, the control component further includes an extrusion pressure indicator light and a power indicator light arranged at intervals, the extrusion pressure indicator light is electrically connected to the pressure controller, and the power indicator light is suitable for displaying the power-on status of the control component; and / or

[0022] The control component further comprises a power socket and a wire outlet, wherein the power socket is arranged on the box of the control component, and the wire outlet is used for connecting and wiring the wire harness, and the wire outlet is arranged on the box of the control component.

[0023] The technical solution provided by the present invention has the following advantages:

[0024] 1. The battery cell thickness measuring device provided by the present invention comprises a base frame, an extrusion mechanism, a pressure detection member, a thickness detection assembly and a control component, wherein the base frame has a stop plate; the extrusion mechanism is arranged on the base frame, the extrusion mechanism comprises a driving member and a movable frame, the movable frame is arranged at the driving end of the driving member, the driving member is suitable for driving the movable frame to move toward the stop plate, and an extrusion position suitable for placing the battery cell is arranged between the movable frame and the stop plate; the pressure detection member is arranged on the extrusion mechanism, and the pressure detection member is used to detect the extrusion force data of the extrusion mechanism acting on the battery cell; the thickness detection assembly comprises at least one displacement detection member, the displacement detection member is installed on the extrusion mechanism, and the detection end of the displacement detection member is arranged on the end surface of the movable frame facing the stop plate; the control component and the pressure detection member are electrically connected, and the control component and the displacement detection member are electrically connected.

[0025] The battery cell thickness measuring device of this structure is provided with a stop plate on the base frame, and an extrusion position suitable for placing the battery cell is formed between the moving frame of the extrusion mechanism and the stop plate; in the thickness measuring stage, the moving frame is driven to move by the driving member to extrude the battery cell, and the extrusion force data of the extrusion mechanism on the battery cell is obtained by the pressure detection member, and the extrusion force data is received by the control member. After the extrusion force data reaches the specified extrusion force, the extrusion mechanism is operated to stop the extrusion of the battery cell; the displacement detection member obtains the displacement data of the detection end, which reflects the actual thickness of the battery cell under the extrusion force. The automatic thickness measurement configuration established by the present invention can quickly obtain the actual thickness of the battery cell under the specified extrusion force state, which is conducive to determining the stacking length of the assembled battery and providing a reference for subsequent manufacturing. The present invention solves the problem of measuring the thickness of the battery cell under the specified extrusion force. In terms of operation, it can flexibly configure the extrusion force on the battery cell, is easy to operate, and can improve the efficiency of detecting the thickness of the battery cell.

[0026] 2. The battery cell thickness measuring device provided by the present invention, the thickness detection component includes a first displacement detection member, a second displacement detection member and a third displacement detection member which are arranged at intervals; the first displacement detection member, the second displacement detection member and the third displacement detection member have different detection heights, the detection end of the first displacement detection member is suitable for being arranged in the upper area of ​​the end surface of the moving frame, the detection end of the second displacement detection member is suitable for being arranged in the middle area of ​​the end surface of the moving frame, and the detection end of the third displacement detection member is suitable for being arranged in the lower area of ​​the end surface of the moving frame.

[0027] The battery cell thickness measuring device of this structure uses three displacement sensors to measure the thickness data of the upper, middle and lower areas of the battery cell under the action of a specified extrusion pressure, thereby obtaining the thickness difference data of the upper, middle and lower areas of the battery cell, and can check the difference in thickness dimensions of different areas of the battery cell, screen out various size segments within the designed thickness range of the battery cell, and facilitate the classification of the battery cell thickness as a reference for the subsequent manufacturing arrangement and layout of the assembled battery.

[0028] 3. In the battery cell thickness measuring device provided by the present invention, all displacement detection parts are configured as mechanical displacement sensors, and high-precision devices are used. The detection accuracy can be specifically set to ±0.01mm and is not affected by environmental factors such as temperature and light. This setting can refine the displacement detection, improve the displacement detection accuracy, and ensure the accuracy of the device's thickness measurement data for battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of the battery thickness measuring device provided by the present invention;

[0031] Figure 2 A schematic diagram of the structure of the battery cell thickness measuring device provided by the present invention from a top view;

[0032] Figure 3 A schematic diagram of the partial structure of the battery thickness measuring device provided by the present invention;

[0033] Figure 4 A partial three-dimensional schematic diagram of a battery cell thickness measuring device provided by the present invention;

[0034] Figure 5 A schematic diagram of the structure of a control box in the battery thickness measuring device provided by the present invention;

[0035] Description of reference numerals:

[0036] 1-base; 11-base; 12-stop plate;

[0037] 2-extrusion mechanism; 21-driving member; 22-transmission member; 23-sliding member; 24-moving frame; 241-pressure plate; 242-connecting plate; 25-first bracket; 26-second bracket; 27-guide kit; 28-guide shaft; 29-linear bearing; 210-track member; 211-moving seat;

[0038] 3-pressure detection member; 4-thickness detection assembly; 41-first displacement detection member; 42-second displacement detection member; 43-third displacement detection member; 44-probe; 45-elastic pin;

[0039] 5-control components; 51-human-machine interface screen; 52-pressure controller; 53-extrusion pressure indicator light; 54-power indicator light; 55-power socket; 56-wire outlet;

[0040] 6-Battery core components. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, including scheme A, or scheme B, or schemes that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Example

[0045] The present embodiment aims to provide a battery cell thickness measuring device to overcome the problem that the traditional vernier caliper can only measure the normal thickness of the battery cell in its natural state. Since the battery cell will be subjected to the force of the adjacent stacked battery cells and the battery outer packaging during the manufacturing process of the assembled battery, it is impossible to obtain the actual thickness of the battery cell, resulting in a technical problem that it is difficult to effectively determine the stacking length of the assembled battery.

[0046] In this embodiment, if Figures 1 to 5As shown, the battery cell thickness measuring device includes a base frame 1, an extrusion mechanism 2, a pressure detection member 3, a thickness detection assembly 4 and a control component 5, the base frame 1 has a stop plate 12; the extrusion mechanism 2 is arranged on the base frame 1, the extrusion mechanism 2 includes a driving member 21 and a movable frame 24, the movable frame 24 is arranged at the driving end of the driving member 21, the driving member 21 is suitable for driving the movable frame 24 to move toward the stop plate 12, and an extrusion position suitable for placing the battery cell 6 is arranged between the movable frame 24 and the stop plate 12; the pressure detection member 3 is arranged on the extrusion mechanism 2, and the pressure detection member 3 is used to detect the extrusion force data of the extrusion mechanism 2 on the battery cell 6; the thickness detection assembly 4 includes at least one displacement detection member, the displacement detection member is installed on the extrusion mechanism 2, and the detection end of the displacement detection member is arranged on the end face of the movable frame 24 facing the stop plate 12; the control component 5 and the pressure detection member 3 are electrically connected, and the control component 5 and the displacement detection member are electrically connected.

[0047] The battery cell thickness measuring device of this structure is provided with a stop plate 12 on the base frame 1, and an extrusion position suitable for placing the battery cell 6 is formed between the moving frame 24 of the extrusion mechanism 2 and the stop plate 12; in the thickness measuring stage, the moving frame 24 is driven to move by the driving member 21 to extrude the battery cell 6, and the pressure detection member 3 obtains the extrusion force data of the extrusion mechanism 2 on the battery cell 6, and the control member 5 receives the extrusion force data. After the extrusion force data reaches the specified extrusion force, the extrusion mechanism 2 is operated to stop the extrusion of the battery cell 6; the displacement detection member obtains the displacement data of the detection end, which reflects the actual thickness of the battery cell 6 under the extrusion force. Through the automatic thickness measurement configuration established by the present invention, the actual thickness of the battery cell 6 under the specified extrusion force state can be quickly obtained, which is conducive to determining the stacking length of the assembled battery and providing a reference for subsequent manufacturing. The present invention solves the problem of measuring the thickness of the battery cell under the specified extrusion force. In terms of operation, it can flexibly configure the extrusion force on the battery cell 6, is easy to operate, and can improve the detection efficiency of the thickness of the battery cell 6.

[0048] In this embodiment, the cell thickness measuring device can be used to measure the thickness of the square cell 6; the thickness direction can be set to any one of the length direction, width direction, and height direction of the square cell 6. Of course, the cell thickness measuring device can be used to measure the axial thickness of the cylindrical cell 6.

[0049] For the structural design embodiment of the base frame 1:

[0050] For example, in some embodiments, Figure 4As shown, the base frame 1 has a base 11 and a stop plate 12, the base 11 is horizontally arranged, the stop plate 12 is vertically arranged on the base 11, the stop plate 12 is arranged in a side area of ​​the base 11, the extrusion mechanism 2 is arranged in the other side area of ​​the base 11, and the lower space of the stop plate 12 facing the extrusion mechanism 2 is set as the extrusion area, and the driving member 21 in the extrusion mechanism 2 drives the moving frame 24 to approach the stop plate 12, and specifically the space between the moving frame 24 and the stop plate 12 constitutes the extrusion position.

[0051] For example, in some embodiments, a reinforcing rib is provided on the side of the stop plate 12 facing away from the extrusion mechanism 2, and two or more reinforcing ribs are provided. The reinforcing rib is fixedly connected to the stop plate 12, and the bottom side of the reinforcing rib is fixedly connected to the base 11. The reinforcing rib supports the stop plate 12 to ensure that the extrusion mechanism 2 acts on the battery cell 6 stage and maintains the stability of the position of the stop plate 12, which is beneficial to improving the thickness measurement accuracy of the device.

[0052] For example, in some embodiments, a rigid protective plate with a smooth surface is provided on the end surface of the base 11 and the stop plate 12 for contacting the battery cell 6. On the one hand, the rigid protective plate can protect the battery cell 6. On the other hand, the rigid protective plate can well abut the battery cell 6 without causing displacement or deformation, which is beneficial to improving the thickness measurement accuracy of the device.

[0053] For the structural design embodiment of the extrusion mechanism 2:

[0054] For example, in some embodiments, Figure 3 and Figure 4 As shown, the extrusion mechanism 2 further includes a transmission member 22, a first bracket 25 and a second bracket 26. The transmission member 22 and the driving member 21 are fixedly connected, the first bracket 25 is fixedly arranged on the base frame 1, the second bracket 26 and the moving frame 24 are movably arranged, the second bracket 26 is arranged on the transmission side of the transmission member 22, the second bracket 26 and the base frame 1 are slidably arranged, and the second bracket 26 is arranged between the moving frame 24 and the first bracket 25; the driving member 21 is suitable for driving the transmission member 22 to cause the second bracket 26 to move close to the moving frame 24, so that the moving frame 24 moves toward the stop plate 12. In terms of structural setting, the first bracket 25 and the second bracket 26 are arranged at intervals, the first bracket 25 is used as the fixed installation part of the extrusion mechanism 2, and the second bracket 26 is used as the sliding movement part of the extrusion mechanism 2. The first bracket 25 can be fixed on the base 11, and the second bracket 26 is slidably connected with the base 11.

[0055] For example, as a further embodiment, Figure 3 and Figure 4As shown, the extrusion mechanism 2 also includes two or more guide shafts 28, any two guide shafts 28 are arranged at intervals, the guide shaft 28 and the first bracket 25 are slidably configured, the guide shaft 28 and the second bracket 26 are slidably configured, and the guiding direction of the guide shaft 28 is arranged in parallel with the moving direction of the movable frame 24; the guide shaft 28 guides the sliding between the first bracket 25 and the second bracket 26, so that the second bracket 26 drives the movement of the movable frame 24 in the desired direction; it is beneficial to improve the movement accuracy of the movable frame 24, avoid the displacement of the movable frame 24, and cause the extrusion action to deviate and tilt, so as to accurately measure the thickness data of the battery cell 6 under the specified extrusion force.

[0056] For example, in some embodiments, four guide shafts 28 are provided, and the four guide shafts 28 are distributed in a rectangular shape. The four guide shafts 28 jointly guide and position the relative movement between the first bracket 25 and the second bracket 26 to ensure the accuracy of the moving frame 24 along the desired moving direction.

[0057] For example, in some embodiments, Figure 3 As shown, the mobile frame 24 includes a pressure plate 241 and a connecting plate 242. The pressure plate 241 and the stop plate 12 are arranged at intervals, and the connecting plate 242 is fixedly connected to the ends of all guide shafts 28 away from the first bracket 25. The pressure plate 241 is used to abut the end surface of the battery core 6 to apply force and squeeze, and the connecting plate 242 is used to connect the guide shaft 28, and when the second bracket 26 moves toward the mobile frame 24, the connecting plate 242 contacts the second bracket 26 to transmit force.

[0058] For example, in some embodiments, Figure 3 As shown, the extrusion mechanism 2 also includes a linear bearing 29, which is configured corresponding to the guide shaft 28, and the guide shaft 28 slides through the linear bearing 29. In the specific structural setting, the first bracket 25 and the second bracket 26 are respectively installed with linear bearings 29, one guide shaft 28 slides through two linear bearings 29, the two linear bearings 29 are coaxially arranged, and the linear bearing 29 is coaxially arranged with the guide shaft 28; in this setting, the linear bearing 29 slides and positions the guide shaft 28 in a linear direction to improve the motion accuracy between the first bracket 25 and the second bracket 26.

[0059] For example, in some embodiments, Figure 4 As shown, the extrusion mechanism 2 further includes a track member 210 and a moving seat 211. The track member 210 is fixedly connected to the base frame 1, the moving seat 211 is slidably arranged on the upper end of the track member 210, and the second bracket 26 is fixedly connected to the moving seat 211. The track member 210 and the moving seat 211 are correspondingly arranged, and the second bracket 26 is slidably installed on the base 11 of the base frame 1 through the track member 210 and the moving seat 211, so as to improve the accuracy and stability of the second bracket 26 moving toward the moving frame 24.

[0060] For example, in some embodiments, the transmission member 22 is configured as a T-type screw member, and the sliding member 23 is configured as a sliding bearing seat. The T-type screw member is configured as a self-locking screw structure, and by means of self-locking, after the extrusion force on the battery core member 6 is stopped, a constant extrusion force is ensured, the stability of the displacement detection member is maintained, and the accuracy of the actual thickness measurement of the battery core member 6 is improved.

[0061] For example, in some embodiments, Figure 3 and Figure 4 As shown, the extrusion mechanism 2 further includes a sliding member 23 and a guide sleeve 27, the sliding member 23 and the second bracket 26 are fixedly connected, the transmission member 22 and the sliding member 23 are in transmission configuration, the guide sleeve 27 and the first bracket 25 are fixedly connected, and the guide sleeve 27 and the transmission member 22 are in rotation configuration. The guide sleeve 27 is used to guide the axial displacement of the transmission member 22.

[0062] For example, in some embodiments, Figure 3 and Figure 4 As shown, the driving member 21 is configured as a driving hand wheel, and the user directly controls the driving hand wheel to drive the driving transmission member 22 to rotate together, so that the sliding member 23 and the second bracket 26 move toward the moving frame 24, thereby abutting against the displacement of the moving frame 24 toward the stop plate 12 to implement the extrusion of the battery core 6. When the pressure data fed back by the pressure detection member 3 reaches the specified extrusion pressure data, the operation of the driving hand wheel is stopped to stop the extrusion of the battery core 6; and then the displacement detection member obtains the displacement data of the detection end, reflecting the actual thickness of the battery core 6 under the extrusion pressure.

[0063] For example, in some embodiments, the driving member 21 is configured as a driving control motor, and the driving control motor is electrically connected to the control component 5. The control component 5 configures the rotation stroke of the driving control motor to similarly cause the movable frame 24 to move so as to squeeze the battery cell 6. When the pressure data fed back by the pressure detection component 3 reaches the specified extrusion pressure data, the control component 5 automatically stops the power supply output to the driving control motor and brakes to stop squeezing the battery cell 6. The displacement detection component then obtains the displacement data of the detection end, reflecting the actual thickness of the battery cell 6 under the action of the extrusion pressure.

[0064] Through the above technical scheme, the movement of the second bracket 26 driven by the sliding member 23 has a first displacement, a second displacement and a third displacement; in the first displacement, the second bracket 26 gradually approaches the movable frame 24, and gradually makes the detection end of the pressure detection member 3 sense the force; in the second displacement, the second bracket 26 abuts against and acts on the movable frame 24 to move toward the battery cell 6; in the third displacement, the second bracket 26 abuts against and acts on the movable frame 24 to squeeze the battery cell 6, and the detection end of the displacement detection member senses the force.

[0065] In a specific embodiment, the detection end of the pressure detection component 3 is arranged on the end face of the mobile frame 24 facing the second bracket 26, and the pressure detection component 3 starts to sense the force after the second bracket 26 displaces and contacts the mobile frame 24. The detection end of the pressure detection component 3 is arranged between the mobile frame 24 and the second bracket 26, and the extrusion force of the extrusion mechanism 2 on the battery cell 6 can be obtained by the force transmission. The detection end of the pressure detection component 3 is placed after the mobile frame 24, and its force transmission and force environment are more stable, and it can better detect and feedback the overall extrusion force of the extrusion mechanism 2 on the battery cell 6. In another specific embodiment, the detection end of the pressure detection component 3 is arranged on the end face of the second bracket 26 facing the mobile frame 24, and the pressure detection component 3 starts to sense the force after the second bracket 26 displaces and contacts the mobile frame 24.

[0066] For the embodiment of the thickness detection of the battery core 6:

[0067] As a preferred embodiment, Figure 4 As shown, the thickness detection component 4 includes a first displacement detection member 41, a second displacement detection member 42 and a third displacement detection member 43 which are arranged at intervals; the first displacement detection member 41, the second displacement detection member 42 and the third displacement detection member 43 have different detection heights, the detection end of the first displacement detection member 41 is suitable for being arranged in the upper area of ​​the end surface of the moving frame 24, the detection end of the second displacement detection member 42 is suitable for being arranged in the middle area of ​​the end surface of the moving frame 24, and the detection end of the third displacement detection member 43 is suitable for being arranged in the lower area of ​​the end surface of the moving frame 24.

[0068] In this way, three displacement sensors are used to measure the thickness data of the upper, middle and lower areas of the battery cell 6 under the action of a specified extrusion pressure, so as to obtain the thickness difference data of the upper, middle and lower areas of the battery cell 6, detect the difference in thickness dimensions of different areas of the battery cell 6, screen out the various size segments within the designed thickness range of the battery cell 6, and facilitate the classification of the thickness of the battery cell 6 as a reference for the subsequent manufacturing arrangement and layout of the assembled battery.

[0069] Of course, more displacement detection components can be provided to detect the thickness of the battery cell 6 in different areas, optimize the number of thickness detections, and improve the accuracy of the actual thickness detection of the battery cell 6, which is beneficial to determine the stacking length of the assembled battery and provide a reference for subsequent manufacturing.

[0070] As a preferred embodiment, all displacement detection components are set as mechanical displacement sensors, using high-precision devices, and their detection accuracy can be specifically set to ±0.01mm, which is not affected by environmental factors such as temperature and light; this setting can refine displacement detection, improve displacement detection accuracy, and ensure the accuracy of the device's thickness measurement data for the battery core 6. Among them, the stroke of the mechanical displacement sensor can be set to 1CM.

[0071] As a preferred embodiment, Figure 3 As shown, any displacement detection member is equipped with a probe 44 and one or more elastic pins 45. The probe 44 and the elastic pin 45 are respectively protruded from the end surface of the movable frame 24 facing the stop plate 12, and the elastic pin 45 is arranged in the vicinity of the probe 44. The probe 44 is configured as an elastic displacement detection end of the displacement detection member, which detects the difference between the theoretical thickness and the actual thickness of the battery core 6 under the action of a specified extrusion force. The elastic pin 45 can be used to protect the probe 44 and make the pressure plate 241 of the movable frame 24 elastically contact and stabilize the battery core 6. A plurality of elastic pins 45 can be arranged around the probe 44.

[0072] In some embodiments, the control component 5 has a box body, which is arranged at the side of the base frame 1 for user operation and control.

[0073] As a preferred technical solution, Figure 5 As shown, the control component 5 includes a human-machine interface screen 51 and a pressure controller 52. The human-machine interface screen 51 is used to display the extrusion pressure data and the thickness data of the battery core 6. The pressure controller 52 is electrically connected to the pressure detection component 3, and the pressure controller 52 and the human-machine interface screen 51 are electrically connected.

[0074] Among them, the control component 5 can display the extrusion pressure of the extrusion mechanism 2 on the battery cell 6 through the human-machine interface screen 51, and the user can know the extrusion pressure by reading. After the extrusion pressure reaches the specified extrusion pressure, the extrusion mechanism 2 stops the extrusion effect on the battery cell 6, and maintains the position of the movable frame 24 in the extrusion mechanism 2, and the displacement detection component reflects the actual thickness of the battery cell 6.

[0075] In the specific calculation method, the measured value of the thickness of the battery cell 6 is converted through PLC. Specifically, the actual thickness value of the battery cell = the product thickness setting value - 5mm + the analog value (0-10mm) read by the displacement detection component, wherein the theoretical thickness of the battery cell can be input through the human-machine interface screen 51, and the displacement detection component feeds back the displacement data to the control component 5, which is calculated by the control component 5 and displayed through the human-machine interface screen 51.

[0076] As a further embodiment, Figure 5 As shown, the control component 5 further includes an extrusion pressure indicator light 53 and a power indicator light 54 which are arranged at intervals. The extrusion pressure indicator light 53 is electrically connected to the pressure controller 52, and the power indicator light 54 is suitable for displaying the power-on state of the control component 5. The pressure controller 52 is used to interface with the input of the specified extrusion pressure on the human-machine interface screen 51.

[0077] As a further embodiment, Figure 5As shown, the control component 5 also includes a power socket 55 and a wire outlet 56 . The power socket 55 is arranged on the box of the control component 5 . The wire outlet 56 is used for connecting and wiring the wire harness. The wire outlet 56 is arranged on the box of the control component 5 .

[0078] In the specific operation process: first put the battery cell 6 into the extrusion position, turn on the power socket 55 when the power socket 55 is connected to the voltage, turn on the power socket 55 switch and power on the electrical box, the power indicator light 54 lights up, the human-machine interface screen 51 is actively operated, the pressure controller 52 sets the extrusion force value (0-500kg), and then drives the extrusion mechanism 2 to start extruding the battery cell 6. When the set extrusion force is reached, the extrusion force indicator light 53 of the electrical box lights up, stops driving the hand wheel to rotate, confirms the extrusion force, and fine-tunes it to the set value; when the extrusion mechanism 2 reaches the set extrusion force value, the extrusion force indicator light 53 lights up, and the thickness dimension values ​​of the three positions of the upper, middle and lower areas of the battery cell 6 are displayed on the human-machine interface. When the subsequent test is of the same batch of battery cells 6, the parameters of the pressure controller 52 and the battery cell design thickness value of the human-machine interface screen 51 can be used as input during the first measurement. For subsequent measurements, it is only necessary to replace the battery cell 6, drive the extrusion mechanism 2, make the extrusion force reach the extrusion force data, and then directly read the thickness value.

[0079] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A battery cell thickness measuring device, characterized in that: include: A base frame (1) having a stop plate (12); An extrusion mechanism (2) is arranged on the base frame (1), the extrusion mechanism (2) comprises a driving member (21) and a movable frame (24), the movable frame (24) is arranged at the driving end of the driving member (21), the driving member (21) is suitable for driving the movable frame (24) to move toward the stop plate (12), and an extrusion position suitable for placing the battery core (6) is arranged between the movable frame (24) and the stop plate (12); A pressure detection component (3) is arranged on the extrusion mechanism (2), and the pressure detection component (3) is used to detect extrusion pressure data of the extrusion mechanism (2) acting on the battery core (6); A thickness detection component (4) comprising at least one displacement detection member, the displacement detection member being mounted on the extrusion mechanism (2), the detection end of the displacement detection member being arranged on an end surface of the movable frame (24) facing the stop plate (12); And a control component (5), wherein the control component (5) and the pressure detection component (3) are electrically connected, and the control component (5) and the displacement detection component are electrically connected.

2. The battery cell thickness measuring device according to claim 1, characterized in that: The extrusion mechanism (2) further comprises a transmission member (22), a first bracket (25) and a second bracket (26); the transmission member (22) and the driving member (21) are fixedly connected; the first bracket (25) is fixedly arranged on the base frame (1); the second bracket (26) and the movable frame (24) are movably arranged; the second bracket (26) is arranged on the transmission side of the transmission member (22); the second bracket (26) and the base frame (1) are slidably arranged; the second bracket (26) is arranged between the movable frame (24) and the first bracket (25); the driving member (21) is suitable for driving the transmission member (22) to cause the second bracket (26) to move close to the movable frame (24) so ​​that the movable frame (24) moves toward the stop plate (12); the detection end of the pressure detection member (3) is arranged on the end surface of the movable frame (24) facing the second bracket (26) or on the end surface of the second bracket (26) facing the movable frame (24).

3. The battery cell thickness measuring device according to claim 2, characterized in that: The extrusion mechanism (2) further comprises at least two guide shafts (28), any two guide shafts (28) are arranged at intervals, the guide shafts (28) and the first bracket (25) are slidably arranged, the guide shaft (28) and the second bracket (26) are slidably arranged, and the guiding direction of the guide shaft (28) and the moving direction of the moving bracket (24) are arranged in parallel; The movable frame (24) comprises a pressure plate (241) and a connecting plate (242); the pressure plate (241) and the stop plate (12) are arranged at intervals; and the connecting plate (242) and the ends of all the guide shafts (28) away from the first bracket (25) are fixedly connected.

4. The battery cell thickness measuring device according to claim 3, characterized in that: The extrusion mechanism (2) further comprises a linear bearing (29), wherein the linear bearing (29) is configured corresponding to the guide shaft (28), and the guide shaft (28) slides through the linear bearing (29); and / or The extrusion mechanism (2) further comprises a track member (210) and a movable seat (211); the track member (210) is fixedly connected to the base frame (1); the movable seat (211) is slidably arranged on the upper end of the track member (210); and the second bracket (26) and the movable seat (211) are fixedly connected.

5. The battery cell thickness measuring device according to claim 2, characterized in that: The extrusion mechanism (2) further comprises a sliding member (23) and a guide sleeve (27); the sliding member (23) and the second bracket (26) are fixedly connected; the transmission member (22) and the sliding member (23) are in a transmission configuration; the guide sleeve (27) and the first bracket (25) are fixedly connected; and the guide sleeve (27) and the transmission member (22) are in a rotation configuration.

6. The battery thickness measuring device according to claim 5, characterized in that: The driving member (21) is configured as a driving hand wheel or a driving control motor, the transmission member (22) is configured as a T-type screw rod member, and the sliding member (23) is configured as a sliding bearing seat.

7. The battery cell thickness measuring device according to any one of claims 1 to 6, characterized in that: The thickness detection component (4) comprises a first displacement detection member (41), a second displacement detection member (42) and a third displacement detection member (43) which are arranged at intervals; the first displacement detection member (41), the second displacement detection member (42) and the third displacement detection member (43) have different detection heights; the detection end of the first displacement detection member (41) is suitable for being arranged in the upper area of ​​the end surface of the moving frame (24); the detection end of the second displacement detection member (42) is suitable for being arranged in the middle area of ​​the end surface of the moving frame (24); and the detection end of the third displacement detection member (43) is suitable for being arranged in the lower area of ​​the end surface of the moving frame (24).

8. The battery cell thickness measuring device according to claim 7, characterized in that: All the displacement detection elements are configured as mechanical displacement sensors; and / or Any displacement detection member is provided with a probe (44) and at least one elastic pin (45), wherein the probe (44) and the elastic pin (45) are respectively protruded from the end surface of the movable frame (24) facing the stop plate (12), and the elastic pin (45) is arranged in the vicinity of the probe (44).

9. The battery cell thickness measuring device according to any one of claims 1 to 6, characterized in that: The control component (5) comprises a human-machine interface screen (51) and a pressure controller (52); the human-machine interface screen (51) is used to display the extrusion pressure data and the thickness data of the battery core (6); the pressure controller (52) is electrically connected to the pressure detection component (3); and the pressure controller (52) is electrically connected to the human-machine interface screen (51).

10. The battery cell thickness measuring device according to claim 9, characterized in that: The control component (5) further comprises an extrusion pressure indicator light (53) and a power indicator light (54) which are arranged at intervals, the extrusion pressure indicator light (53) being electrically connected to the pressure controller (52), and the power indicator light (54) being suitable for displaying the power-on state of the control component (5); and / or The control component (5) further comprises a power socket (55) and a wire outlet (56); the power socket (55) is arranged on the box of the control component (5); the wire outlet (56) is used for connecting and wiring a wire harness; the wire outlet (56) is arranged on the box of the control component (5).

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