Exhaust auxiliary tool for battery cell packaging

Abstract

The utility model provides an exhaust auxiliary tool for packaging a battery cell. The exhaust auxiliary tool comprises a tool main body with a bearing surface, pressing plates respectively arranged on two opposite sides of the bearing surface, an angle adjusting unit and a position adjusting unit, a placing space for placing a to-be-packaged battery cell is formed between the two pressing plates and the bearing surface; the angle adjusting units are arranged between the pressing plates and the tool body and used for adjusting the inclination angles of the pressing plates. The position adjusting unit is arranged between at least one pressing plate and the tool body and used for adjusting the distance between the two pressing plates so that the battery cell can be extruded. According to the exhaust auxiliary tool for packaging the battery cell, the inclination angle of each pressing plate is adjusted through the angle adjusting unit, and the distance between the two pressing plates is adjusted through the position adjusting unit, so that the extrusion of the battery cell is facilitated, the fitting degree of electrolyte and a pole group is better, the problems of interface black spots, lithium precipitation and the like are reduced, and the production efficiency is improved. Therefore, the packaging quality of the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to an exhaust auxiliary tooling for battery cell packaging. Background Art

[0002] As people's environmental awareness increases and the world's energy crisis intensifies, the research and application of clean and renewable energy have received more and more attention. Compared with hydrogen energy and sodium electricity, the development and manufacturing of lithium-ion batteries are more mature, among which soft-pack batteries have been widely developed due to their good safety performance, light weight, and flexible design.

[0003] Soft-pack batteries need to be evacuated before final sealing. The outside will be covered with an aluminum-plastic film, and a certain amount of electrolyte will be added into the aluminum-plastic film. The electrolyte will infiltrate the battery cells. Currently, the battery cells are generally placed vertically in the Degas final sealing cavity. At this time, the free electrolyte gathers at the bottom of the battery cells. Due to the parallelism tolerance of the Degas splint, there is no uniform pressure on the battery cells, resulting in uneven force on a large surface of the battery cells, which leads to loose fitting of the electrode groups. Therefore, it is more likely to produce abnormal problems such as black spots and lithium precipitation, resulting in poor packaging quality of the battery cells. Utility Model Content

[0004] In view of this, the utility model aims to provide an exhaust auxiliary tooling for battery cell packaging, so as to improve the quality of battery cell packaging.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An exhaust auxiliary tool for battery cell packaging, comprising a tool body having a supporting surface, pressing plates respectively arranged on two opposite sides of the supporting surface, an angle adjustment unit and a position adjustment unit;

[0007] A placement space for placing the battery cells to be packaged is formed between the two pressing plates and the supporting surface;

[0008] The angle adjustment unit is respectively arranged between each of the pressing plates and the tooling body, and is used to adjust the inclination angle of the pressing plate;

[0009] The position adjustment unit is disposed between at least one of the pressing plates and the tooling body, and is used to adjust the distance between the two pressing plates so as to squeeze the battery cell.

[0010] Furthermore, the angle adjustment unit includes two screws arranged at intervals in the upper and lower parts; each of the screws passes through the tooling body and is screwed connected to the tooling body, and one end of each of the screws is hingedly connected to the pressure plate on the same side. When external force drives the screw to rotate, the inclination angle of the pressure plate can be adjusted.

[0011] Furthermore, it also includes at least one rotation driving unit, wherein a power output end of the rotation driving unit is connected to the screw rod for driving the screw rod to rotate.

[0012] Furthermore, the position adjustment unit includes an adjustment rod slidably arranged on the tooling body; one end of the adjustment rod is hingedly connected to the pressure plate on the same side, and when an external force drives the adjustment rod to slide, the distance between the two pressure plates is adjustable.

[0013] Furthermore, it also includes at least one linear drive unit, and the power output end of the linear drive unit is connected to the adjustment rod to drive the adjustment rod to slide.

[0014] Furthermore, at least one angle detection unit is provided on the tool body, and the angle detection unit is used to detect the inclination angle of the pressing plate on the same side.

[0015] Furthermore, the angle detection unit includes a controller and at least two position sensors electrically connected to the controller respectively; the position sensors are arranged on the tooling body at intervals up and down, and are used to detect the distance information between themselves and the pressure plate, and send the distance information to the controller, and the controller is configured to receive the distance information to obtain the inclination angle of the pressure plate.

[0016] Furthermore, the tooling body is provided with the angle detection unit arranged in one-to-one correspondence with the pressing plate; and / or the position sensor includes a laser sensor.

[0017] Furthermore, the tooling body is in a "U" shape, and has a horizontally arranged transverse part, and vertical parts arranged on both sides of the transverse part; the transverse part has the supporting surface, and the angle adjustment unit and the position adjustment unit are arranged between the vertical part and the pressure plate on the same side.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The exhaust auxiliary tooling for cell packaging described in the utility model adjusts the inclination angle of each pressing plate through the angle adjustment unit, and adjusts the distance between the two pressing plates through the position adjustment unit, which is beneficial to squeezing the cell, so that the electrolyte and the electrode group are better fitted, and is beneficial to reducing the occurrence of interface black spots, lithium precipitation and other problems, thereby improving the quality of cell packaging.

[0020] In addition, the two screws in the angle adjustment unit are screwed to the main body of the tooling. By adjusting the position of the pressure plate, the inclination angle of the pressure plate can be changed, and the setting of the screw is also conducive to improving the accuracy of the pressure plate angle adjustment. The use of a rotary drive unit to drive the screw is conducive to driving the screw to rotate, thereby facilitating the operational convenience of adjusting the angle of the pressure plate and facilitating design implementation. By adjusting the spacing between the pressure plates through the adjustment rod, the battery cells in the placement space can be squeezed so that the pressure plate can fit the surface of the battery cell, which is conducive to the flow of electrolyte to the upper part of the battery cell. The use of a linear drive unit makes the adjustment rod drive the pressure plate more stable, so that the pressure plate can continuously apply pressure to the battery cell. The structure is simple, the operation is convenient, and it is conducive to design implementation.

[0021] In addition, the angle detection unit can obtain the inclination angle of the detection plate, making the angle adjustment of the plate more precise, thereby improving the squeezing effect on the battery cell. By using the combination of a position sensor and a controller, the angle of the platen is converted into the position of the platen for detection, making the detection process simpler, and the structure is simple, which is conducive to design and implementation. Angle detection units are provided on both sides so that more precise angle adjustment can be achieved on both sides. When the adjustment angles on both sides are different, it can be reflected through the angle detection unit; the position sensor uses a laser sensor with a simple structure, which is conducive to design and implementation. The main body of the tooling is "U"-shaped, with a simple structure, easy to arrange and implement, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the exhaust auxiliary tooling for battery cell packaging according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a tool body of an exhaust auxiliary tool for battery cell packaging according to an embodiment of the utility model;

[0025] Description of reference numerals:

[0026] 1. Tool body; 2. Press plate; 5. Battery cell; 7. Screw; 8. Rotary drive unit; 9. Adjustment rod; 10. Linear drive unit; 11. Position sensor;

[0027] 101. horizontal part; 102. vertical part;

[0028] s, supporting surface; t, placement space. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are 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, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" 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 an indirect connection 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 in combination with specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] The present embodiment relates to an exhaust auxiliary tool for cell packaging, which can improve the packaging quality of the cell 5 by adjusting the inclination angle of the pressing plate 2 and fitting it to the surface of the cell 5 .

[0034] In terms of overall structure, the exhaust auxiliary tooling for cell packaging of this embodiment includes a tooling body 1 having a supporting surface s, pressing plates 2 respectively arranged on two opposite sides of the supporting surface s, an angle adjustment unit and a position adjustment unit.

[0035] Among them, a placement space t for placing the battery cell 5 to be packaged is formed between the two pressing plates 2 and the supporting surface s, and the angle adjustment unit is respectively arranged between each pressing plate 2 and the tooling body 1, and is used to adjust the inclination angle of the pressing plate 2. In addition, the position adjustment unit is arranged between at least one of the pressing plates 2 and the tooling body 1, and is used to adjust the distance between the two pressing plates 2 so as to squeeze the battery cell 5.

[0036] The exhaust auxiliary tooling in this embodiment is applied in the process of exhausting and packaging the battery cell 5 to improve the wetting effect of the electrolyte and the exhaust efficiency of the gas in the battery cell 5 .

[0037] The exhaust auxiliary tooling for cell packaging of the present embodiment adjusts the inclination angle of each pressing plate 2 by an angle adjustment unit, and adjusts the distance between the two pressing plates 2 by a position adjustment unit, which is beneficial to squeezing the cell, making the electrolyte and the electrode group fit better, and is beneficial to reducing the occurrence of problems such as interface black spots and lithium deposition, thereby improving the quality of cell 5 packaging.

[0038] Based on the above overall introduction, an exemplary structure of the exhaust auxiliary tooling for battery cell packaging in this embodiment is as follows: Figure 1 and Figure 2 As shown, as the installation carrier of the entire exhaust auxiliary tooling, the tooling body 1 is in a "U" shape, and has a horizontally arranged transverse portion 101, and vertical portions 102 arranged on both sides of the transverse portion 101. Among them, the transverse portion 101 has a supporting surface s, and the angle adjustment unit and the position adjustment unit are arranged between the vertical portion 102 and the pressure plate 2 on the same side. The tooling body 1 is in a "U" shape, with a simple structure, and is conducive to the installation of other components.

[0039] Specifically, the angle adjustment unit includes two screw rods 7 arranged at intervals in the upper and lower parts, and each screw rod 7 passes through the tooling body 1 and is screwed to the tooling body 1, and one end of each screw rod 7 is hinged to the pressing plate 2 on the same side. When the screw rod 7 is driven to rotate by an external force, the inclination angle of the pressing plate 2 can be adjusted. The screw rod 7 of this embodiment is screwed to the tooling body 1, and the spacing between the pressing plate 2 and the vertical part 102 on the same side can be adjusted by driving the screw rod 7 to rotate. In addition, the setting of the screw rod 7 is also conducive to improving the adjustment accuracy of the inclination angle of the pressing plate 2.

[0040] In order to drive the screw 7 to rotate and improve the convenience of adjusting the inclination angle of the pressing plate 2, the exhaust auxiliary tooling in this embodiment also includes at least one rotary drive unit 8, and the power output end of the rotary drive unit 8 is connected to the screw 7 to drive the screw 7 to rotate. In specific implementation, the rotary drive units 8 are respectively arranged in a one-to-one correspondence with the screw 7, so as to improve the convenience of adjusting the angle of the pressing plate 2. The rotary drive unit 8 can adopt a motor in the prior art, which is mature, easy to arrange, and has a good use effect. Of course, the number of rotary drive units 8 can also be adjusted according to usage requirements.

[0041] In addition, as a preferred embodiment, the position adjustment unit of the exhaust tooling for cell packaging in this embodiment includes an adjustment rod 9 slidably arranged on the tooling body 1. Specifically, the adjustment rod 9 is located between the two screw rods 7, and one end of the adjustment rod 9 is hingedly connected to the pressure plate 2 on the same side. When the external force drives the adjustment rod 9 to slide, the distance between the two pressure plates 2 is adjustable. In this embodiment, by adjusting the distance between the pressure plates 2 by the adjustment rod 9, the cell 5 in the placement space t can be squeezed so that the pressure plate 2 can fit the surface of the cell 5, which is conducive to the electrolyte flowing from the bottom of the cell 5 to the upper part.

[0042] It is understandable that when the battery cell 5 is placed vertically in the placement space t, free electrolyte accumulates at the bottom of the battery cell 5 , and when the pressure plate 2 applies pressure to the battery cell 5 , the electrolyte is squeezed and flows to the upper part of the battery cell 5 , thereby infiltrating the upper part of the battery cell 5 .

[0043] Moreover, as a preferred implementation form, the exhaust auxiliary tooling for cell packaging of this embodiment also includes at least one linear drive unit 10, and the power output end of the linear drive unit 10 is connected to the adjusting rod 9, which is used to drive the adjusting rod 9 to slide. Here, the linear drive unit 10 is used to make the driving of the adjusting rod 9 on the pressing plate 2 more stable, so that the pressing plate 2 can continuously apply pressure to the battery cell 5. The structure is simple, the operation is convenient, and it is conducive to design and implementation. Preferably, the linear drive unit 10 in this embodiment can be a cylinder, which can apply continuous pressure to the pressing plate 2 to meet the exhaust requirements during the packaging process of the battery cell 5.

[0044] As a preferred embodiment, at least one angle detection unit is provided on the tooling body 1 of the exhaust auxiliary tooling for battery cell packaging in this embodiment. The angle detection unit is used to detect the inclination angle of the pressure plate 2 on the same side. The angle detection unit can intuitively detect the inclination angle of the pressure plate 2, so that the angle adjustment of the pressure plate 2 is more precise, so as to achieve the effect of fully fitting the surface of the battery cell 5.

[0045] Furthermore, as a preferred embodiment, the angle detection unit of the exhaust auxiliary tooling for battery cell packaging of this embodiment includes a controller and at least two position sensors 11 electrically connected to the controller. The position sensors 11 are arranged on the tooling body 1 at intervals up and down, and are used to detect the distance information between the position sensor 11 and the pressing plate 2, and send the distance information to the controller, and the controller is configured to receive the distance information and obtain the inclination angle of the pressing plate 2.

[0046] In this embodiment, the upper and lower position sensors 11 detect the distance between themselves and the pressing plate 2, and the tilt angle of the pressing plate 2 can be obtained by simple calculation of the controller. The controller here can be a PLC controller in the prior art. The position sensor 11 is used in combination with the controller to convert the angle of the pressing plate 2 into the position of the pressing plate 2 for detection, making the detection process simpler, and the structure is simple, which is conducive to design and implementation.

[0047] Preferably, the position sensor 11 in this embodiment includes a laser sensor, and each laser sensor is arranged corresponding to the pressing plate 2 on the same side to facilitate the detection of the spacing between the pressing plates 2. The laser sensor in the prior art can meet the demand for measuring the position of the pressing plate 2, has a simple structure, and is easy to design and implement.

[0048] In addition, the tool body 1 of the exhaust auxiliary tool for battery cell packaging in this embodiment is provided with an angle detection unit arranged one-to-one corresponding to the pressure plate 2, that is, the angle of each pressure plate 2 can be detected by the angle detection device, which is conducive to improving the angle adjustment efficiency of the pressure plate 2.

[0049] As a preferred embodiment, the spacing between the two pressing plates 2 in the use state is gradually increased from bottom to top, so that the spacing at the bottom of the two pressing plates 2 is smaller, so that when the battery cell 5 is squeezed, the electrolyte in the bag can flow upward, which is beneficial to improve the infiltration efficiency of the electrolyte; and through the squeezing of the pressing plate 2, the electrode group is fully infiltrated with the electrolyte, reducing the probability of problems such as interface black spots and lithium precipitation, thereby improving the packaging quality of the battery cell 5.

[0050] When the exhaust auxiliary tooling in this embodiment is used, the thickness of the bottom of the battery cell 5 is measured in advance to obtain the thickness data of the bottom of the battery cell 5, and the inclination angle of the pressing plate 2 is adjusted by the screw 7 according to the thickness data of the bottom of the battery cell 5, so that the bottom of the pressing plate 2 is closer to the bottom of the battery cell 5, and the pressing plate 2 presents a shape with the top tilted outward. Then, the air in the bag of the battery cell is evacuated, and the position of the pressing plate 2 is adjusted by the position adjustment unit. The pressing plate 2 is attached to the surface of the battery cell 5 and applies pressure to the surface of the battery cell 5, so that the electrolyte at the bottom of the battery cell 5 moves upward under the squeeze, and the upper part of the battery cell 5 is infiltrated, so that the battery cell 5 is fully infiltrated by the electrolyte, and the packaging quality of the battery cell 5 is improved.

[0051] It should be noted that, when the position adjustment unit adjusts the position of the pressing plate 2 , the angle adjustment unit moves together with the position adjustment unit while maintaining the angle of the pressing plate 2 , to ensure that the inclination angle of the pressing plate 2 does not change while the pressing plate 2 is squeezing the battery cell 5 .

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust auxiliary tool for battery cell packaging, characterized in that: It comprises a tooling body having a supporting surface, pressing plates respectively arranged on two opposite sides of the supporting surface, an angle adjustment unit and a position adjustment unit; A placement space for placing the battery cells to be packaged is formed between the two pressing plates and the supporting surface; The angle adjustment unit is respectively arranged between each of the pressing plates and the tooling body, and is used to adjust the inclination angle of the pressing plate; The position adjustment unit is arranged between at least one of the pressing plates and the tooling body, and is used to adjust the distance between the two pressing plates so as to squeeze the battery core.

2. The exhaust auxiliary tooling for battery cell packaging according to claim 1, characterized in that: The angle adjustment unit includes two screws spaced apart from each other. Each of the screw rods passes through the tooling body and is threadedly connected to the tooling body, and one end of each of the screw rods is hingedly connected to the pressure plate on the same side. When an external force drives the screw rod to rotate, the inclination angle of the pressure plate is adjustable.

3. The exhaust auxiliary tooling for battery cell packaging according to claim 2, characterized in that: It also includes at least one rotation driving unit, wherein a power output end of the rotation driving unit is connected to the screw rod for driving the screw rod to rotate.

4. The exhaust auxiliary tooling for battery cell packaging according to claim 1, characterized in that: The position adjustment unit includes an adjustment rod slidably arranged on the tooling body; One end of the adjusting rod is hingedly connected to the pressing plate on the same side, and when the adjusting rod is driven to slide by external force, the distance between the two pressing plates can be adjusted.

5. The exhaust auxiliary tooling for battery cell packaging according to claim 4, characterized in that: It also includes at least one linear drive unit, a power output end of the linear drive unit is connected to the adjustment rod, and is used to drive the adjustment rod to slide.

6. The exhaust auxiliary tooling for battery cell packaging according to claim 1, characterized in that: At least one angle detection unit is disposed on the tool body, and the angle detection unit is used to detect the inclination angle of the pressing plate on the same side.

7. The exhaust auxiliary tooling for battery cell packaging according to claim 6, characterized in that: The angle detection unit includes a controller, and at least two position sensors electrically connected to the controller respectively; The position sensor is arranged on the tooling body at intervals up and down, and is used to detect the distance information between itself and the pressure plate, and send the distance information to the controller. The controller is configured to receive the distance information and obtain the inclination angle of the pressure plate.

8. The exhaust auxiliary tooling for battery cell packaging according to claim 7, characterized in that: The tool body is provided with the angle detection units arranged in one-to-one correspondence with the pressing plates; and / or, The position sensor includes a laser sensor.

9. The exhaust auxiliary tooling for battery cell packaging according to any one of claims 1 to 8, characterized in that: The tool body is in a "U" shape, and has a horizontally arranged transverse portion, and vertical portions arranged on both sides of the transverse portion; The transverse portion has the supporting surface, and the angle adjustment unit and the position adjustment unit are arranged between the vertical portion and the pressing plate on the same side.

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