Pressure acquisition assembly and pressure calibration device for battery cell formation

Abstract

The utility model discloses a pressure acquisition assembly and a pressure calibration device for battery cell formation. The pressure acquisition assembly comprises a first stress part, a second stress part and a pressure sensor, wherein the first stress part and the second stress part are arranged in an overlapped manner; the pressure sensor is arranged between the first stress part and the second stress part; a protruding part extending in the direction from the first stress plane to the second stress plane is arranged on one side of the first stress piece, the protruding part is located between the first stress plane and the second stress plane, and a distance is at least formed between the protruding part and the second stress plane. And a positioning piece is detachably connected to the protruding part. When the pressure acquisition assembly is inserted into the preset position of the pressurization formation equipment, the upper surface of the protruding part is lower than the upper surface of the second stress part, so that the protruding part does not interfere with the pressure sensor between the second stress part and the first stress part, and normal work of the pressure sensor is facilitated. When the pressure acquisition assembly is inserted into a preset position of the pressurization formation equipment, the positioning piece abuts against the preset position so as to limit the insertion depth of the pressure acquisition assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field generally, especially a pressure collection subassembly and pressure calibration device for electric core formation. BACKGROUND

[0002] In the soft package battery process, the electric core needs to be pressurized and formed. The size of the formation pressure directly affects the performance and quality of the battery. In order to ensure the accuracy of pressure test, it is necessary to use calibration device to calibrate the pressure of formation equipment regularly.

[0003] In related technology, the pressurized formation equipment includes vertical pressurized formation equipment and horizontal pressurized formation equipment. The vertical pressurized formation equipment needs to be equipped with corresponding pressure calibration device, and the horizontal pressurized formation equipment needs to be equipped with corresponding pressure calibration device.

[0004] However, the above-mentioned pressure calibration device lacks compatibility and cannot be applied to vertical pressurized formation equipment and horizontal pressurized formation equipment at the same time. INVENTION CONTENTS

[0005] The application expects to provide a pressure collection subassembly and a pressure calibration device for electric core formation, which at least has compatibility and can be applied to vertical pressurized formation equipment and horizontal pressurized formation equipment.

[0006] The utility model provides a pressure collection subassembly, which comprises: a first force receiving member and a second force receiving member arranged in a stack, and a pressure sensor arranged between the first force receiving member and the second force receiving member.

[0007] The first force receiving member comprises a first force receiving plane facing away from the second force receiving member, the second force receiving member comprises a second force receiving plane facing away from the first force receiving member, and the first force receiving plane and the second force receiving plane are arranged in parallel.

[0008] One side of the first force receiving member is provided with a protruding part extending in the direction from the first force receiving plane to the second force receiving plane.

[0009] A positioning member can be detachably connected to the protruding part. The positioning member extends in a direction perpendicular to the first force receiving plane and at least protrudes from one of the first force receiving plane and the second force receiving plane.

[0010] As an implementation manner, the positioning member comprises a connecting shaft and a positioning rotating sleeve. The positioning rotating sleeve is sleeved on the connecting shaft and can rotate.

[0011] As an implementation manner, a plurality of positioning members are provided. The plurality of positioning members are symmetrically arranged about the protruding part.

[0012] As an implementation manner, a handle is arranged on the surface of the second force receiving member or the first force receiving member away from the protruding portion, and the handle is rotationally connected with the protruding portion to enable the handle to rotate relative to the protruding portion and hover at a preset position.

[0013] As an implementation manner, a hinge member is further arranged, which is connected with the protruding portion and hinged and frictionally connected with the handle.

[0014] As an implementation manner, an electric connector is further arranged, and the electric connector and the handle are arranged on the same side of the protruding portion.

[0015] As an implementation manner, the first force receiving member is integrally formed with the protruding portion or is separately connected with the protruding portion.

[0016] As an implementation manner, a mounting groove is arranged on any one of the surface of the first force receiving member close to the second force receiving member and the surface of the second force receiving member close to the first force receiving member, and the pressure sensor is mounted in the mounting groove.

[0017] As an implementation manner, the protruding portion is located between the first force receiving plane and the second force receiving plane and has a spacing with at least the second force receiving plane.

[0018] The utility model also provides a pressure calibration device for electric core formation,

[0019] The pressure display instrument is connected with the pressure acquisition assembly through an electric connection line, and the pressure display instrument is used at least for displaying the pressure value collected by the pressure acquisition assembly.

[0020] When the pressure acquisition assembly is inserted into the preset position of the pressure formation equipment, the upper surface of the protruding portion is lower than the upper surface of the second force receiving member, the protruding portion does not interfere with the pressure sensor between the second force receiving member and the first force receiving member, and the pressure sensor can work normally.

[0021] A positioning member can be detachably connected to the upper surface or the lower surface of the protruding portion, the positioning member extends along a direction perpendicular to the first force receiving plane and protrudes at least from one of the first force receiving plane and the second force receiving plane. When the pressure acquisition assembly is inserted into the preset position of the pressure formation equipment, the positioning member abuts against the a or b end surface of the preset position to limit the insertion depth of the pressure acquisition assembly, so that the first force receiving member and the second force receiving member are completely inserted, and the protruding portion is avoided from being inserted. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0023] Figure 1 A structure schematic view of a first pressure calibration device for cell formation provided by the utility model embodiment;

[0024] Figure 2 A structure schematic view of a second pressure calibration device for cell formation provided by the utility model embodiment;

[0025] Figure 3 A structure schematic view of a pressure acquisition assembly provided by the utility model embodiment;

[0026] Figure 4 A structure schematic view of a first force receiving member and a second force receiving member provided by the utility model embodiment;

[0027] Figure 5 A structure schematic view of a first force receiving member provided by the utility model embodiment;

[0028] Figure 6 A structure schematic view of a first force receiving member and a second force receiving member provided by the utility model embodiment;

[0029] Figure 7 A schematic view of a pressure acquisition assembly in an application scenario provided by the utility model embodiment;

[0030] Pressure acquisition assembly 10, first force receiving member 11, first force receiving plane 111, first wire passing groove 113, first mounting groove 112, second force receiving member 12, second force receiving plane 121, second mounting groove 122, protruding part 13, front surface 131 of protruding part 13, upper surface 132 of protruding part, lower surface 133 of protruding part, positioning member 14, connecting shaft 141, positioning rotating sleeve 142, handle 15, hinged member 16, electric connector 17;

[0031] Pressure display instrument 20, electric connecting line 30. DETAILED DESCRIPTION

[0032] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0033] It should be noted that, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments.

[0034] At least refer to Figures 1-5As shown, the utility model example provides a kind of pressure calibration device for battery formation, including pressure display instrument 20 and pressure acquisition component 10, pressure display instrument 20 is connected with pressure acquisition component 10 by electric connection line 30, and pressure display instrument 20 is at least used to show the pressure value of pressure acquisition component 10 acquisition.

[0035] As Figure 1 As shown, pressure display instrument 20 and pressure acquisition component 10 are independent of each other, and are connected by electric connection line 30.

[0036] Pressure acquisition component 10 is used to be inserted into the preset position of pressurizing formation equipment, for example, vertical pressurizing formation equipment includes battery accommodating cavity, and a plurality of batteries to be pressurized are arranged in the rectangular array in the battery accommodating cavity, and each battery to be pressurized is arranged horizontally.Pressure acquisition component 10 is inserted into the preset position of vertical pressurizing formation equipment to obtain the pressure received by each battery to be pressurized;Horizontal pressurizing formation equipment includes battery accommodating cavity, and a plurality of batteries to be pressurized are arranged in the rectangular array in the battery accommodating cavity, and each battery to be pressurized is arranged vertically.Pressure acquisition component 10 is inserted into the preset position of horizontal pressurizing formation equipment to obtain the pressure received by each battery to be pressurized.

[0037] Pressure acquisition component 10 can be inserted into the preset position of vertical pressurizing formation equipment along the horizontal direction;Pressure acquisition component 10 can be inserted into the preset position of horizontal pressurizing formation equipment along the vertical direction.Thus, the pressure calibration device for battery formation has compatibility, which can be applied to vertical pressurizing formation equipment and horizontal pressurizing formation equipment, and improves the utilization rate of the pressure calibration device for battery formation.In addition, since pressure display instrument 20 and pressure acquisition component 10 are independent of each other, compared with the integrated pressure display instrument 20 and pressure acquisition component 10 in the related art, when one of pressure display instrument 20 and pressure acquisition component 10 fails, it is convenient to repair in time;The independently arranged pressure display instrument 20 can not be limited by the calibration position, and the pressure value can be checked at any position, which is convenient for operators.

[0038] Among them, the power supply that can be charged is arranged in pressure display instrument 20.

[0039] As Figure 1 And Figure 3 As shown, at least one end of electric connection line 30 is detachably connected with pressure display instrument 20 or pressure acquisition component 10 through electric connector 17.

[0040] The electric connector 17 is used for transmitting current and signal, and can be a threaded electric connector 17, a clamped electric connector 17, a plug-in electric connector 17, etc. For example, the pressure collection assembly 10 is provided with an aviation female plug, and the electric connecting wire 30 is provided with an aviation male plug, which is connected with the aviation female plug in a plug-in manner, so that the connection is convenient, fast, and suitable for frequent connection.

[0041] In addition, the pressure display instrument 20 comprises a plurality of signal input interfaces, each of which is connected with each pressure collection assembly 10 through the electric connecting wire 30 in a one-to-one manner.

[0042] Reference Figure 2 The operator inserts the plurality of pressure collection assemblies 10 into the preset positions of the pressure forming equipment in sequence, and the pressure display instrument 20 can display the pressure values of the plurality of pressure collection assemblies 10 at the same time, so that the pressure values of the plurality of preset positions can be obtained at the same time, the efficiency of the calibration is improved, and the calibration time is shortened. It should be noted that the pressure display instrument 20 can display the pressure values of seven pressure collection assemblies 10 at the same time.

[0043] As shown in Figures 3-5 , the pressure collection assembly 10 comprises a first force receiving member 11 and a second force receiving member 12 arranged in a stack, and a pressure sensor (not shown) arranged between the first force receiving member 11 and the second force receiving member 12.

[0044] The first force receiving member 11 comprises a first force receiving plane 111 facing away from the second force receiving member 12, as shown in Figure 4 , the first force receiving plane 111 is also the lower surface of the first force receiving member 11. The second force receiving member 12 comprises a second force receiving plane 121 facing away from the first force receiving member 11, as shown in Figure 4 , the second force receiving plane 121 is also the upper surface of the second force receiving member 12. The first force receiving plane 111 and the second force receiving plane 121 are arranged in parallel.

[0045] The front side of the first force receiving member 11 is provided with a protruding portion 13 extending in the direction from the first force receiving plane 111 to the second force receiving plane 121. The protruding portion 13 is integrally formed with the first force receiving member 11, which is convenient to process and low in production cost; or the protruding portion 13 is connected with the first force receiving member 11 in a separate manner. The protruding portion 13 is located between the first force receiving plane 111 and the second force receiving plane 121, and has a spacing with at least the second force receiving plane 121.

[0046] As shown in Figure 3 and Figure 4As shown, the protruding part 13 comprises an upper surface 132 and a lower surface 133, the upper surface 132 is parallel to the lower surface 133, and the upper surface 132 is parallel to the first stress plane 111 and the second stress plane 121. The lower surface 133 of the protruding part 13 is in the same plane as the first stress plane 111 of the first stress member 11, and the upper surface 132 of the protruding part 13 is lower than the upper surface of the second stress member 12, and there is a gap between them.

[0047] As shown in Figure 4 and Figure 5 , the first mounting groove 112 and the first wire passing groove 113 are arranged on the surface of the first stress member 11 close to the second stress member 12, and the first wire passing groove 113 is in communication with the first mounting groove 112. The pressure sensor is mounted in the mounting groove, for example, the pressure sensor can be mounted in the mounting groove by threaded connection, or the pressure sensor can be mounted in the mounting groove by interference fit. One end of the electric connection wire is electrically connected to the pressure sensor, and is led to the pressure display instrument 20 through the first wire passing groove 113.

[0048] Of course, as shown in Figure 6 , the second mounting groove 122 and the second wire passing groove are arranged on the surface of the second stress member 12 close to the first stress member 11, and the pressure sensor is mounted in the second mounting groove 122.

[0049] When the pressure collecting assembly 10 is inserted into the preset position of the pressure forming device, because the upper surface 132 of the protruding part 13 is lower than the upper surface of the second stress member 12, the protruding part 13 does not interfere with the pressure sensor between the second stress member 12 and the first stress member 11, which helps the pressure sensor to work normally. If the upper surface 132 of the protruding part 13 is higher than the upper surface of the second stress member 12, when the pressure collecting assembly 10 is inserted into the preset position of the pressure forming device, the upper surface 132 of the protruding part 13 is also inserted into the preset position of the pressure forming device, then the upper surface 132 of the protruding part 13 has a force on the preset position, which interferes with the normal work of the pressure sensor.

[0050] In addition, the positioning member 14 can be detachably connected to the upper surface 132 or the lower surface 133 of the protruding part 13, the positioning member 14 extends in a direction perpendicular to the first stress plane 111, and at least protrudes from one of the first stress plane 111 and the second stress plane 121.

[0051] As shown in Figure 3 and Figure 4As shown, the positioning member 14 comprises a connecting shaft 141 and a positioning rotating sleeve 142. The connecting shaft 141 is threadedly connected to the upper surface 132 or the lower surface 133 of the protruding portion 13, or the connecting shaft 141 is embeddedly connected to the upper surface 132 or the lower surface 133 of the protruding portion 13. The axis direction of the connecting shaft 141 is perpendicular to the upper surface 132 or the lower surface 133 of the protruding portion 13. The positioning rotating sleeve 142 is sleeved on the connecting shaft 141 and can rotate.

[0052] As shown in Figure 7 When the pressure collecting assembly 10 is inserted into the preset position of the pressurizing forming device, the positioning rotating sleeve 142 of the positioning member 14 abuts against the a or b end surface of the preset position, so as to limit the insertion depth of the pressure collecting assembly 10, so that the first force receiving member 11 and the second force receiving member 12 are completely inserted, and the protruding portion 13 is avoided to be inserted. At the same time, since the positioning rotating sleeve 142 can rotate, the first force receiving member 11 and the second force receiving member 12 can move along the left and right directions, as shown by the arrow in Figure 7 , so that the other preset positions can be calibrated, and the calibration efficiency is improved.

[0053] Further, as shown in Figure 3 , a plurality of positioning members 14 are installed on the pressure collecting assembly 10. Two positioning members 14 are connected on the upper surface 132 of the protruding portion 13, and two positioning members 14 are connected on the lower surface 133 of the protruding portion 13. The two positioning members 14 on the upper surface 132 and the two positioning members 14 on the lower surface 133 are symmetrically arranged about the protruding portion 13. In this way, the first force receiving member 11 and the second force receiving member 12 can slide freely and stably.

[0054] Of course, it can be understood that the four positioning members 14 are removed, and the pressure collecting assembly 10 can be compatible with the pressure calibration of the hot-pressing device, the shell short-circuit test and other full-process pressure devices.

[0055] As an implementation manner, a hand holding member 15 is arranged on the surface of the protruding portion 13 away from the second force receiving member 12 or the first force receiving member 11. The hand holding member 15 is in damping rotation connection with the protruding portion 13, so that the hand holding member 15 can rotate relative to the protruding portion 13 and hover over the preset position.

[0056] As shown in Figure 3 , the hand holding member 15 is connected on the front surface 131 of the protruding portion 13. The hand holding member 15 can be semicircular, semi-elliptical, arched or the like. The hand holding member 15 is connected on the front surface 131 of the protruding portion 13 through two hinged members 16. The hand holding member 15 and the hinged members 16 can be made of carbon steel, stainless steel or the like. A friction area is arranged at the position where the hand holding member 15 contacts the hinged members 16, and a friction area is also arranged at the position where the hinged members 16 contact the hand holding member 15. The friction area can be realized by scratching or groove manner or the like.

[0057] The handheld component 15 rotates around the front surface 131 of the protrusion 13 until it reaches a preset position. Due to the frictional engagement between the handheld component 15 and the hinge 16, the handheld component 15 can be suspended at the preset position to facilitate the operator's gripping and to help the first force-bearing component 11 and the second force-bearing component 12 to be inserted into the preset position of the pressurization and formation equipment in a horizontal or vertical direction.

[0058] In addition, the handheld part 15 is connected to the electrical connector 17 on the front surface 131 of the protrusion 13.

[0059] like Figure 3 As shown, the electrical connector 17 is located between the two hinges 16, which makes full use of the space on the front side of the protrusion 13 and helps to shorten the size of the protrusion 13 in the left-right direction. However, when the hand grips the handheld part 15, the electrical connector 17 or the electrical connection cable 30 connected to the electrical connector 17 affects the hand's grip, making it uncomfortable for the operator. In this application, the handheld part 15 can rotate around the front surface 131 of the protrusion 13 and hover at a preset position. The operator can adjust the position of the handheld part 15 to reduce the impact of the electrical connector 17 or the electrical connection cable 30 connected to the electrical connector 17 on the hand, making the operator's grip more comfortable.

[0060] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A pressure acquisition component (10), characterized in that, It includes a first force-bearing component (11) and a second force-bearing component (12) stacked together, and a pressure sensor disposed between the first force-bearing component (11) and the second force-bearing component (12). The first force-bearing member (11) includes a first force-bearing plane (111) that is away from the second force-bearing member (12), and the second force-bearing member (12) includes a second force-bearing plane (121) that is away from the first force-bearing member (11). The first force-bearing plane (111) and the second force-bearing plane (121) are arranged parallel to each other. The first force-bearing member (11) has a protrusion (13) on one side extending in the direction from the first force-bearing plane (111) to the second force-bearing plane (121). A positioning member (14) is detachably connected to the protrusion (13). The positioning member (14) extends in a direction perpendicular to the first force plane (111) and protrudes from at least one of the first force plane (111) and the second force plane (121).

2. The pressure acquisition component (10) according to claim 1, characterized in that, The positioning component (14) includes a connecting shaft (141) and a positioning rotating sleeve (142). The positioning rotating sleeve (142) is fitted onto the connecting shaft (141) and is capable of rotating.

3. The pressure acquisition component (10) according to claim 2, characterized in that, The facility is provided with a plurality of positioning elements (14), which are symmetrically arranged about the protrusion (13).

4. The pressure acquisition component (10) according to claim 1, characterized in that, A handle (15) is provided on the surface of the protrusion (13) facing away from the second force-bearing member (12) or the first force-bearing member (11). The handle (15) is damped and rotatably connected to the protrusion (13) so that the handle (15) can rotate relative to the protrusion (13) and hover at a preset position.

5. The pressure acquisition component (10) according to claim 4, characterized in that, It also includes a hinge (16) connected to the protrusion (13), the hinge (16) being hinged to and frictionally engaged with the handle (15).

6. The pressure acquisition component (10) according to claim 4 or 5, characterized in that, It also includes an electrical connector (17). The electrical connector (17) and the handle (15) are connected to the same side of the protrusion (13).

7. The pressure acquisition component (10) according to any one of claims 1-5, characterized in that, The first force-bearing member (11) and the protrusion (13) are integrally formed.

8. The pressure acquisition component (10) according to any one of claims 1-5, characterized in that, A mounting groove is provided on either the surface of the first force-bearing member (11) near the second force-bearing member (12) or the surface of the second force-bearing member (12) near the first force-bearing member (11), and the pressure sensor is mounted in the mounting groove.

9. The pressure acquisition component (10) according to any one of claims 1-5, characterized in that, The protrusion (13) is located between the first force-bearing plane (111) and the second force-bearing plane (121), and has a distance from the second force-bearing plane (121).

10. A pressure calibration device for cell formation, comprising a pressure display (20) and a pressure acquisition component (10) according to any one of claims 1-9. The pressure display (20) is connected to the pressure acquisition component (10) via an electrical connection line (30), and the pressure display (20) is used to display at least the pressure value acquired by the pressure acquisition component (10).

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